WARNING: suspicious RCU usage in cancel_delayed_work

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision
7f49902c	assessment-security	DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	WARNING: suspicious RCU usage in cancel_delayed_work_sync	2026/08/15 00:46	2026/08/15 00:46	2026/08/15 01:12	746171ee

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[syzbot] [mmc?] WARNING: suspicious RCU usage in cancel_delayed_work_sync	0 (1)	2026/08/14 15:11

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[syzbot] [mmc?] WARNING: suspicious RCU usage in cancel_delayed_work_sync

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2026/08/14 15:11

============================= WARNING: suspicious RCU usage syzkaller #0 Tainted: G L ----------------------------- kernel/sched/core.c:9159 Illegal context switch in RCU-sched read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz.3.506/7021: #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:237 [inline] #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_common_ioctl+0x419/0x2b80 block/ioctl.c:666 #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline] #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:238 [inline] #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_common_ioctl+0x443/0x2b80 block/ioctl.c:666 #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0x1a6/0x4e0 include/linux/mmzone.h:2270 #3: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 stack backtrace: CPU: 0 UID: 0 PID: 7021 Comm: syz.3.506 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 lockdep_rcu_suspicious.cold+0x4f/0xb1 kernel/locking/lockdep.c:6876 __might_resched+0x2e0/0x330 kernel/sched/core.c:9159 __cancel_work_sync kernel/workqueue.c:4487 [inline] cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x3/0xe0 lib/smp_processor_id.c:13 Code: 65 8b 05 8c d7 c7 08 85 c0 74 04 90 0f 0b 90 e9 53 fc ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 <53> 48 83 ec 08 65 8b 1d 65 95 c7 08 65 f7 05 56 95 c7 08 ff ff ff RSP: 0018:ffffc90003867910 EFLAGS: 00000283 RAX: 0000000000000000 RBX: ffffffff8ede8180 RCX: ffffc90005a81000 RDX: 0000000000080000 RSI: ffffffff8c600300 RDI: ffffffff8c600340 RBP: ffffffff84f847be R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88813fe33020 R13: 0000000000000008 R14: ffffea00002ffe00 R15: ffff888050828f88 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 trace_lock_release include/trace/events/lock.h:68 [inline] lock_release+0x24d/0x310 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:962 [inline] pfn_valid+0x2d3/0x4e0 include/linux/mmzone.h:2280 bvec_try_merge_page+0xd0/0x290 block/bio.c:955 bio_add_page+0x2d4/0x580 block/bio.c:1063 bio_add_folio+0x60/0x90 block/bio.c:1107 __blkdev_issue_zero_pages+0x287/0x4e0 block/blk-lib.c:209 blkdev_issue_zero_pages block/blk-lib.c:231 [inline] blkdev_issue_zeroout+0x3b7/0x630 block/blk-lib.c:312 blk_ioctl_zeroout block/ioctl.c:243 [inline] blkdev_common_ioctl+0x48e/0x2b80 block/ioctl.c:666 blkdev_ioctl+0x43b/0x6f0 block/ioctl.c:791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fef3ef9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fef3fed7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fef3f225fa0 RCX: 00007fef3ef9e0d9 RDX: 0000200000000000 RSI: 000000000000127f RDI: 0000000000000003 RBP: 00007fef3f035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fef3f226038 R14: 00007fef3f225fa0 R15: 00007fffdd8003c8 </TASK> BUG: sleeping function called from invalid context at kernel/workqueue.c:4487 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 7021, name: syz.3.506 preempt_count: 102, expected: 0 RCU nest depth: 0, expected: 0 4 locks held by syz.3.506/7021: #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:237 [inline] #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_common_ioctl+0x419/0x2b80 block/ioctl.c:666 #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline] #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:238 [inline] #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_common_ioctl+0x443/0x2b80 block/ioctl.c:666 #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0x1a6/0x4e0 include/linux/mmzone.h:2270 #3: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 Preemption disabled at: [<ffffffff84f8468f>] rcu_read_lock_sched include/linux/rcupdate.h:935 [inline] [<ffffffff84f8468f>] pfn_valid+0x19f/0x4e0 include/linux/mmzone.h:2270 CPU: 0 UID: 0 PID: 7021 Comm: syz.3.506 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 __might_resched.cold+0x1ec/0x232 kernel/sched/core.c:9197 __cancel_work_sync kernel/workqueue.c:4487 [inline] cancel_delayed_work_sync+0xb8/0xf0 kernel/workqueue.c:4568 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x3/0xe0 lib/smp_processor_id.c:13 Code: 65 8b 05 8c d7 c7 08 85 c0 74 04 90 0f 0b 90 e9 53 fc ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 <53> 48 83 ec 08 65 8b 1d 65 95 c7 08 65 f7 05 56 95 c7 08 ff ff ff RSP: 0018:ffffc90003867910 EFLAGS: 00000283 RAX: 0000000000000000 RBX: ffffffff8ede8180 RCX: ffffc90005a81000 RDX: 0000000000080000 RSI: ffffffff8c600300 RDI: ffffffff8c600340 RBP: ffffffff84f847be R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88813fe33020 R13: 0000000000000008 R14: ffffea00002ffe00 R15: ffff888050828f88 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 trace_lock_release include/trace/events/lock.h:68 [inline] lock_release+0x24d/0x310 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:962 [inline] pfn_valid+0x2d3/0x4e0 include/linux/mmzone.h:2280 bvec_try_merge_page+0xd0/0x290 block/bio.c:955 bio_add_page+0x2d4/0x580 block/bio.c:1063 bio_add_folio+0x60/0x90 block/bio.c:1107 __blkdev_issue_zero_pages+0x287/0x4e0 block/blk-lib.c:209 blkdev_issue_zero_pages block/blk-lib.c:231 [inline] blkdev_issue_zeroout+0x3b7/0x630 block/blk-lib.c:312 blk_ioctl_zeroout block/ioctl.c:243 [inline] blkdev_common_ioctl+0x48e/0x2b80 block/ioctl.c:666 blkdev_ioctl+0x43b/0x6f0 block/ioctl.c:791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fef3ef9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fef3fed7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fef3f225fa0 RCX: 00007fef3ef9e0d9 RDX: 0000200000000000 RSI: 000000000000127f RDI: 0000000000000003 RBP: 00007fef3f035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fef3f226038 R14: 00007fef3f225fa0 R15: 00007fffdd8003c8 </TASK> ============================= WARNING: suspicious RCU usage syzkaller #0 Tainted: G W L ----------------------------- kernel/rcu/srcutree.c:1483 Illegal synchronize_srcu() in same-type SRCU (or in RCU) read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz.3.506/7021: #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:237 [inline] #0: ffff8880248b7ae8 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_common_ioctl+0x419/0x2b80 block/ioctl.c:666 #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:1079 [inline] #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: blk_ioctl_zeroout block/ioctl.c:238 [inline] #1: ffff8880248b7c80 (mapping.invalidate_lock){++++}-{4:4}, at: blkdev_common_ioctl+0x443/0x2b80 block/ioctl.c:666 #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: rcu_read_lock_sched include/linux/rcupdate.h:938 [inline] #2: ffffffff8ede8180 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0x1a6/0x4e0 include/linux/mmzone.h:2270 #3: ffffc90000007ca0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11f/0x610 kernel/time/timer.c:1745 stack backtrace: CPU: 0 UID: 0 PID: 7021 Comm: syz.3.506 Tainted: G W L syzkaller #0 PREEMPT(full) Tainted: [W]=WARN, [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 lockdep_rcu_suspicious.cold+0x4f/0xb1 kernel/locking/lockdep.c:6876 __synchronize_srcu+0x29d/0x300 kernel/rcu/srcutree.c:1483 wakeup_source_remove drivers/base/power/wakeup.c:201 [inline] wakeup_source_unregister.part.0+0x12c/0x540 drivers/base/power/wakeup.c:237 wakeup_source_unregister+0x1f/0x30 drivers/base/power/wakeup.c:236 mmc_host_classdev_release+0x42/0x120 drivers/mmc/core/host.c:69 device_release+0xd2/0x270 drivers/base/core.c:2636 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1f7/0x640 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3880 vub300_delete drivers/mmc/host/vub300.c:379 [inline] kref_put include/linux/kref.h:65 [inline] vub300_inactivity_timer_expired drivers/mmc/host/vub300.c:747 [inline] vub300_inactivity_timer_expired+0x42f/0x550 drivers/mmc/host/vub300.c:742 call_timer_fn+0x19a/0x610 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers+0x757/0xb00 kernel/time/timer.c:2374 __run_timer_base kernel/time/timer.c:2386 [inline] __run_timer_base kernel/time/timer.c:2378 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2395 run_timer_softirq+0x1a/0x50 kernel/time/timer.c:2405 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_preemption_disabled+0x3/0xe0 lib/smp_processor_id.c:13 Code: 65 8b 05 8c d7 c7 08 85 c0 74 04 90 0f 0b 90 e9 53 fc ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 <53> 48 83 ec 08 65 8b 1d 65 95 c7 08 65 f7 05 56 95 c7 08 ff ff ff RSP: 0018:ffffc90003867910 EFLAGS: 00000283 RAX: 0000000000000000 RBX: ffffffff8ede8180 RCX: ffffc90005a81000 RDX: 0000000000080000 RSI: ffffffff8c600300 RDI: ffffffff8c600340 RBP: ffffffff84f847be R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88813fe33020 R13: 0000000000000008 R14: ffffea00002ffe00 R15: ffff888050828f88 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:752 trace_lock_release include/trace/events/lock.h:68 [inline] lock_release+0x24d/0x310 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:962 [inline] pfn_valid+0x2d3/0x4e0 include/linux/mmzone.h:2280 bvec_try_merge_page+0xd0/0x290 block/bio.c:955 bio_add_page+0x2d4/0x580 block/bio.c:1063 bio_add_folio+0x60/0x90 block/bio.c:1107 __blkdev_issue_zero_pages+0x287/0x4e0 block/blk-lib.c:209 blkdev_issue_zero_pages block/blk-lib.c:231 [inline] blkdev_issue_zeroout+0x3b7/0x630 block/blk-lib.c:312 blk_ioctl_zeroout block/ioctl.c:243 [inline] blkdev_common_ioctl+0x48e/0x2b80 block/ioctl.c:666 blkdev_ioctl+0x43b/0x6f0 block/ioctl.c:791 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fef3ef9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fef3fed7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fef3f225fa0 RCX: 00007fef3ef9e0d9 RDX: 0000200000000000 RSI: 000000000000127f RDI: 0000000000000003 RBP: 00007fef3f035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fef3f226038 R14: 00007fef3f225fa0 R15: 00007fffdd8003c8 </TASK> ODEBUG: object ffffc90000007a70 is NOT on stack ffffc90003860000, but annotated. ====================================================== ---------------- Code disassembly (best guess): 0: 65 8b 05 8c d7 c7 08 mov %gs:0x8c7d78c(%rip),%eax # 0x8c7d793 7: 85 c0 test %eax,%eax 9: 74 04 je 0xf b: 90 nop c: 0f 0b ud2 e: 90 nop f: e9 53 fc ff ff jmp 0xfffffc67 14: 0f 1f 00 nopl (%rax) 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 41 54 push %r12 29: 55 push %rbp * 2a: 53 push %rbx <-- trapping instruction 2b: 48 83 ec 08 sub $0x8,%rsp 2f: 65 8b 1d 65 95 c7 08 mov %gs:0x8c79565(%rip),%ebx # 0x8c7959b 36: 65 gs 37: f7 .byte 0xf7 38: 05 56 95 c7 08 add $0x8c79556,%eax 3d: ff (bad) 3e: ff (bad) 3f: ff .byte 0xff

Crashes (104):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Assets (help?)	Manager	Title
2026/08/17 14:09	upstream	8d3ae59288f1	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 17:33	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5704a4065c2c	587f6b29	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 15:01	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5704a4065c2c	587f6b29	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 10:04	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5704a4065c2c	316d9396	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 06:12	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5704a4065c2c	316d9396	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/09/01 05:41	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5704a4065c2c	316d9396	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 23:39	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	cee9395acd80	316d9396	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 17:03	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	cee9395acd80	316d9396	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 08:44	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/31 02:37	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 22:33	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 14:06	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 12:24	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 11:20	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/30 08:58	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 21:16	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 14:23	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 13:02	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/29 03:49	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	2f52988a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/28 16:23	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	e2fa417d	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/28 09:34	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	e2fa417d	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 18:56	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	69a01293	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 13:21	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	69a01293	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 09:49	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	a2b77b9e	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 07:11	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	a2b77b9e	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/27 00:34	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	a2b77b9e	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 21:29	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	a2b77b9e	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 16:26	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	45c13f3f9e3b	a2b77b9e	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 03:53	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	6a91adb4	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/26 01:38	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	6a91adb4	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 23:23	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	a9a1fc32	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 20:48	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	a9a1fc32	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 17:28	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	a9a1fc32	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 14:01	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	a9a1fc32	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/25 11:06	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	614e416a	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/24 20:18	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	b55bd4c3	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/24 18:00	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	b55bd4c3	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/24 16:39	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	b55bd4c3	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/24 12:21	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	b55bd4c3	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/24 09:50	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/24 04:46	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/23 14:54	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/23 12:00	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/23 10:34	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/23 04:41	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/22 21:00	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e1e6e541c5c9	1e72964b	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/14 16:56	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	bdab5605259b	6f9b3e89	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/14 05:43	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	05abeffcc27e	b13552fe	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync
2026/08/13 20:33	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5d5fd841c346	b13552fe	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci2-upstream-usb	WARNING: suspicious RCU usage in cancel_delayed_work_sync

Crashes (104):

Assets (help?)

2026/08/17 14:09

upstream