INFO: task syz.4.753:8975 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller-00048-gc62f4b82d571 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.753 state:D stack:24616 pid:8975 tgid:8975 ppid:5853 task_flags:0x400040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x6ff/0xa50 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
filemap_fault+0x9bd/0x13d0 mm/filemap.c:3409
__do_fault+0x135/0x390 mm/memory.c:5098
do_shared_fault mm/memory.c:5582 [inline]
do_fault mm/memory.c:5656 [inline]
do_pte_missing mm/memory.c:4160 [inline]
handle_pte_fault+0xfcc/0x61c0 mm/memory.c:5997
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f4f1a955ebc
RSP: 002b:00007f4f1acdfb88 EFLAGS: 00010202
RAX: 0000200000000080 RBX: 0000000000000004 RCX: 8000000000000011
RDX: 0000000000000011 RSI: 00007f4f1a4000b2 RDI: 0000200000000080
RBP: 00007f4f1abb7ba0 R08: 00007f4f1a800000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f4f1abb616c
R13: 00007f4f1abb6160 R14: fffffffffffffffe R15: 00007f4f1acdfca0
INFO: task syz.0.775:9073 blocked for more than 144 seconds.
Not tainted 6.15.0-rc2-syzkaller-00048-gc62f4b82d571 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.775 state:D stack:24936 pid:9073 tgid:9073 ppid:5855 task_flags:0x440040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x6ff/0xa50 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
do_sync_mmap_readahead+0x3e6/0x6c0 mm/filemap.c:-1
filemap_fault+0x763/0x13d0 mm/filemap.c:3402
__do_fault+0x135/0x390 mm/memory.c:5098
do_shared_fault mm/memory.c:5582 [inline]
do_fault mm/memory.c:5656 [inline]
do_pte_missing mm/memory.c:4160 [inline]
handle_pte_fault+0xfcc/0x61c0 mm/memory.c:5997
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ff918054b33
RSP: 002b:00007ff9184dfb50 EFLAGS: 00010246
RAX: 0000200000000400 RBX: 0000000000000002 RCX: 0000000000000000
RDX: 0000000000000018 RSI: 0000000000000000 RDI: 00005555695043c8
RBP: 00007ff9184dfc58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007ff9183b608c
R13: 00007ff9183b6080 R14: fffffffffffffffe R15: 00007ff9184dfca0
Showing all locks held in the system:
6 locks held by kworker/0:1/10:
#0: ffff888144ed9148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff888144ed9148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc900000f7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900000f7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffff8880284f3198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#2: ffff8880284f3198 (&dev->mutex){....}-{4:4}, at: hub_event+0x200/0x50f0 drivers/usb/core/hub.c:5859
#3: ffff8880415bd198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff8880415bd198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x90/0x530 drivers/base/dd.c:1005
#4: ffff8880399ec160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#4: ffff8880399ec160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x90/0x530 drivers/base/dd.c:1005
#5: ffffffff8ebe4110 (umhelper_sem){++++}-{4:4}, at: usermodehelper_read_trylock+0x142/0x300 kernel/umh.c:214
1 lock held by khungtaskd/31:
#0: ffffffff8ed3dfa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3dfa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3dfa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
4 locks held by kworker/u8:5/1150:
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88801bef6148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x990/0x18e0 kernel/workqueue.c:3319
#1: ffffc90003c27c60 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90003c27c60 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
#2: ffffffff900f0a50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x17c/0xd60 net/core/net_namespace.c:608
#3: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
2 locks held by getty/5594:
#0: ffff88814da2b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036e32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
4 locks held by udevd/5847:
#0: ffff888038f3c418 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb4/0xda0 fs/seq_file.c:182
#1: ffff88803c5bc488 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff888028c6be18 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff8880415bd198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#3: ffff8880415bd198 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2730
4 locks held by kworker/u8:12/7925:
2 locks held by syz.3.712/8797:
2 locks held by syz.4.753/8975:
#0: ffff8880313f7948 (vm_lock){++++}-{0:0}, at: do_user_addr_fault arch/x86/mm/fault.c:1328 [inline]
#0: ffff8880313f7948 (vm_lock){++++}-{0:0}, at: handle_page_fault arch/x86/mm/fault.c:1480 [inline]
#0: ffff8880313f7948 (vm_lock){++++}-{0:0}, at: exc_page_fault+0x17d/0x920 arch/x86/mm/fault.c:1538
#1: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#1: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x9bd/0x13d0 mm/filemap.c:3409
1 lock held by syz.0.775/9073:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.1.807/9196:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.7.844/9326:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.5.862/9390:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.5.862/9391:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.5.862/9393:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:912 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: blkdev_fallocate+0x210/0x490 block/fops.c:839
1 lock held by syz.9.1012/10107:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.2.1024/10152:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
1 lock held by syz.6.1029/10166:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_order+0x45e/0xca0 mm/readahead.c:491
2 locks held by syz.0.1087/10417:
#0: ffff88807bac1fe0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline]
#0: ffff88807bac1fe0 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1812 [inline]
#0: ffff88807bac1fe0 (&mm->mmap_lock){++++}-{4:4}, at: faultin_page_range+0x392/0x850 mm/gup.c:1981
#1: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:922 [inline]
#1: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x66b/0x13d0 mm/filemap.c:3390
1 lock held by syz.0.1087/10421:
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:912 [inline]
#0: ffff888148d1a040 (mapping.invalidate_lock#2){++++}-{4:4}, at: blkdev_fallocate+0x210/0x490 block/fops.c:839
1 lock held by syz.4.1110/10490:
#0: ffff8880284f3198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
#0: ffff8880284f3198 (&dev->mutex){....}-{4:4}, at: usbdev_open+0x155/0x790 drivers/usb/core/devio.c:1054
2 locks held by syz.3.1113/10505:
#0: ffffffff8f890ca0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8f890ca0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8f890ca0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:570
#1: ffffffff8ed43380 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3774
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00048-gc62f4b82d571 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7918 Comm: kworker/u8:10 Not tainted 6.15.0-rc2-syzkaller-00048-gc62f4b82d571 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lock_acquire+0x167/0x2f0 arch/x86/include/asm/irqflags.h:-1
Code: c7 44 24 10 00 00 00 00 9c 8f 44 24 10 f7 44 24 10 00 02 00 00 0f 85 fd 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 65 48 8b 45 00 <48> 3b 44 24 38 0f 85 72 01 00 00 48 83 c4 40 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90003947a38 EFLAGS: 00000206
RAX: ae0dc497fe5e2b00 RBX: ffffffff8ed3dfa0 RCX: ae0dc497fe5e2b00
RDX: 0000000000000000 RSI: ffffffff8e4fde39 RDI: ffffffff8ca1b760
RBP: ffffffff9368d020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000002 R14: 0000000000000246 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124f93000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558d8695c8 CR3: 0000000033376000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245