BUG: sleeping function called from invalid context at kernel/workqueue.c:3414 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 11961, name: syz.3.2029 preempt_count: 100, expected: 0 RCU nest depth: 1, expected: 0 3 locks held by syz.3.2029/11961: #0: ffff88801b3e27a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] #0: ffff88801b3e27a0 (&mm->mmap_lock){++++}-{3:3}, at: __mm_populate+0x183/0x390 mm/gup.c:1675 #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: filemap_get_entry+0xce/0x3f0 mm/filemap.c:1849 #2: ffffc90000007be0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:419 [inline] [] handle_softirqs+0x101/0x820 kernel/softirq.c:554 CPU: 0 PID: 11961 Comm: syz.3.2029 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 __might_resched+0x48d/0x5f0 kernel/sched/core.c:10212 start_flush_work kernel/workqueue.c:3414 [inline] __flush_work+0x10f/0xac0 kernel/workqueue.c:3474 __cancel_work_timer+0x3f8/0x560 kernel/workqueue.c:3562 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:694 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x570/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x27d/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5760 Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc9000c31f460 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: f77e3d1066a62800 RDX: 0000000000000000 RSI: ffffffff8acade60 RDI: ffffffff8b1d3ba0 RBP: ffffc9000c31f568 R08: dffffc0000000000 R09: 1ffffffff223d6a0 R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: 1ffff92001863e98 R13: ffffffff8d1320e0 R14: 0000000000000246 R15: dffffc0000000000 rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock include/linux/rcupdate.h:786 [inline] filemap_get_entry+0xea/0x3f0 mm/filemap.c:1849 shmem_get_folio_gfp+0x2a4/0x2b40 mm/shmem.c:1975 shmem_fault+0x1b8/0x820 mm/shmem.c:2248 __do_fault+0x13b/0x4d0 mm/memory.c:4244 do_read_fault mm/memory.c:4638 [inline] do_fault mm/memory.c:4775 [inline] do_pte_missing mm/memory.c:3689 [inline] handle_pte_fault mm/memory.c:5047 [inline] __handle_mm_fault mm/memory.c:5188 [inline] handle_mm_fault+0x3945/0x4a50 mm/memory.c:5353 faultin_page mm/gup.c:868 [inline] __get_user_pages+0x604/0x1580 mm/gup.c:1167 populate_vma_page_range+0x2c1/0x380 mm/gup.c:1593 __mm_populate+0x260/0x390 mm/gup.c:1696 mm_populate include/linux/mm.h:3383 [inline] vm_mmap_pgoff+0x2da/0x3f0 mm/util.c:561 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb5b839e159 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:00007fb5b65f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fb5b8625fa0 RCX: 00007fb5b839e159 RDX: b635773f06ebbee6 RSI: 0000000000b36000 RDI: 0000200000000000 RBP: 00007fb5b843506b R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb5b8626038 R14: 00007fb5b8625fa0 R15: 00007fff37ea74f8 ============================= WARNING: suspicious RCU usage syzkaller #0 Tainted: G W ----------------------------- kernel/rcu/srcutree.c:1377 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 3 locks held by syz.3.2029/11961: #0: ffff88801b3e27a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] #0: ffff88801b3e27a0 (&mm->mmap_lock){++++}-{3:3}, at: __mm_populate+0x183/0x390 mm/gup.c:1675 #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: filemap_get_entry+0xce/0x3f0 mm/filemap.c:1849 #2: ffffc90000007be0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698 stack backtrace: CPU: 0 PID: 11961 Comm: syz.3.2029 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 lockdep_rcu_suspicious+0x1e1/0x300 kernel/locking/lockdep.c:6733 __synchronize_srcu+0x150/0x3d0 kernel/rcu/srcutree.c:1373 wakeup_source_remove drivers/base/power/wakeup.c:198 [inline] wakeup_source_unregister+0x116/0x190 drivers/base/power/wakeup.c:242 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:77 device_release+0xbc/0x1e0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x21b/0x450 lib/kobject.c:737 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x570/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x27d/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5760 Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc9000c31f460 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: f77e3d1066a62800 RDX: 0000000000000000 RSI: ffffffff8acade60 RDI: ffffffff8b1d3ba0 RBP: ffffc9000c31f568 R08: dffffc0000000000 R09: 1ffffffff223d6a0 R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: 1ffff92001863e98 R13: ffffffff8d1320e0 R14: 0000000000000246 R15: dffffc0000000000 rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock include/linux/rcupdate.h:786 [inline] filemap_get_entry+0xea/0x3f0 mm/filemap.c:1849 shmem_get_folio_gfp+0x2a4/0x2b40 mm/shmem.c:1975 shmem_fault+0x1b8/0x820 mm/shmem.c:2248 __do_fault+0x13b/0x4d0 mm/memory.c:4244 do_read_fault mm/memory.c:4638 [inline] do_fault mm/memory.c:4775 [inline] do_pte_missing mm/memory.c:3689 [inline] handle_pte_fault mm/memory.c:5047 [inline] __handle_mm_fault mm/memory.c:5188 [inline] handle_mm_fault+0x3945/0x4a50 mm/memory.c:5353 faultin_page mm/gup.c:868 [inline] __get_user_pages+0x604/0x1580 mm/gup.c:1167 populate_vma_page_range+0x2c1/0x380 mm/gup.c:1593 __mm_populate+0x260/0x390 mm/gup.c:1696 mm_populate include/linux/mm.h:3383 [inline] vm_mmap_pgoff+0x2da/0x3f0 mm/util.c:561 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb5b839e159 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:00007fb5b65f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fb5b8625fa0 RCX: 00007fb5b839e159 RDX: b635773f06ebbee6 RSI: 0000000000b36000 RDI: 0000200000000000 RBP: 00007fb5b843506b R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb5b8626038 R14: 00007fb5b8625fa0 R15: 00007fff37ea74f8 BUG: sleeping function called from invalid context at kernel/rcu/srcutree.c:1381 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 11961, name: syz.3.2029 preempt_count: 100, expected: 0 RCU nest depth: 1, expected: 0 3 locks held by syz.3.2029/11961: #0: ffff88801b3e27a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:146 [inline] #0: ffff88801b3e27a0 (&mm->mmap_lock){++++}-{3:3}, at: __mm_populate+0x183/0x390 mm/gup.c:1675 #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #1: ffffffff8d1320e0 (rcu_read_lock){....}-{1:2}, at: filemap_get_entry+0xce/0x3f0 mm/filemap.c:1849 #2: ffffc90000007be0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xd2/0x540 kernel/time/timer.c:1698 Preemption disabled at: [] softirq_handle_begin kernel/softirq.c:419 [inline] [] handle_softirqs+0x101/0x820 kernel/softirq.c:554 CPU: 0 PID: 11961 Comm: syz.3.2029 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 __might_resched+0x48d/0x5f0 kernel/sched/core.c:10212 __synchronize_srcu+0x197/0x3d0 kernel/rcu/srcutree.c:1381 wakeup_source_remove drivers/base/power/wakeup.c:198 [inline] wakeup_source_unregister+0x116/0x190 drivers/base/power/wakeup.c:242 mmc_host_classdev_release+0x47/0x100 drivers/mmc/core/host.c:77 device_release+0xbc/0x1e0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x21b/0x450 lib/kobject.c:737 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x570/0x810 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x27d/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5760 Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc9000c31f460 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: f77e3d1066a62800 RDX: 0000000000000000 RSI: ffffffff8acade60 RDI: ffffffff8b1d3ba0 RBP: ffffc9000c31f568 R08: dffffc0000000000 R09: 1ffffffff223d6a0 R10: dffffc0000000000 R11: fffffbfff223d6a1 R12: 1ffff92001863e98 R13: ffffffff8d1320e0 R14: 0000000000000246 R15: dffffc0000000000 rcu_lock_acquire include/linux/rcupdate.h:334 [inline] rcu_read_lock include/linux/rcupdate.h:786 [inline] filemap_get_entry+0xea/0x3f0 mm/filemap.c:1849 shmem_get_folio_gfp+0x2a4/0x2b40 mm/shmem.c:1975 shmem_fault+0x1b8/0x820 mm/shmem.c:2248 __do_fault+0x13b/0x4d0 mm/memory.c:4244 do_read_fault mm/memory.c:4638 [inline] do_fault mm/memory.c:4775 [inline] do_pte_missing mm/memory.c:3689 [inline] handle_pte_fault mm/memory.c:5047 [inline] __handle_mm_fault mm/memory.c:5188 [inline] handle_mm_fault+0x3945/0x4a50 mm/memory.c:5353 faultin_page mm/gup.c:868 [inline] __get_user_pages+0x604/0x1580 mm/gup.c:1167 populate_vma_page_range+0x2c1/0x380 mm/gup.c:1593 __mm_populate+0x260/0x390 mm/gup.c:1696 mm_populate include/linux/mm.h:3383 [inline] vm_mmap_pgoff+0x2da/0x3f0 mm/util.c:561 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fb5b839e159 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:00007fb5b65f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fb5b8625fa0 RCX: 00007fb5b839e159 RDX: b635773f06ebbee6 RSI: 0000000000b36000 RDI: 0000200000000000 RBP: 00007fb5b843506b R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb5b8626038 R14: 00007fb5b8625fa0 R15: 00007fff37ea74f8 ODEBUG: object ffffc900000079c0 is NOT on stack ffffc9000c318000, but annotated. ====================================================== ---------------- Code disassembly (best guess): 0: f7 84 24 80 00 00 00 testl $0x200,0x80(%rsp) 7: 00 02 00 00 b: 43 c6 44 3c 04 f8 movb $0xf8,0x4(%r12,%r15,1) 11: 0f 85 f0 00 00 00 jne 0x107 17: 41 f7 c6 00 02 00 00 test $0x200,%r14d 1e: 74 01 je 0x21 20: fb sti 21: 48 c7 44 24 60 0e 36 movq $0x45e0360e,0x60(%rsp) 28: e0 45 * 2a: 4b c7 04 3c 00 00 00 movq $0x0,(%r12,%r15,1) <-- trapping instruction 31: 00 32: 43 c7 44 3c 08 00 00 movl $0x0,0x8(%r12,%r15,1) 39: 00 00 3b: 65 gs 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 04 25 add $0x25,%al