INFO: task syz.4.81:6562 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc2-syzkaller-00028-gbe48bcf004f9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.81 state:D stack:24472 pid:6562 tgid:6561 ppid:5831 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
io_schedule+0x81/0xe0 kernel/sched/core.c:7903
folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1317
release_[ 275.802622][ T39] folio_lock include/linux/pagemap.h:1133 [inline]
release_[ 275.802622][ T39] release_metapage+0x103/0xab0 fs/jfs/jfs_metapage.c:870
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0x9a0/0xde0 fs/jfs/jfs_metapage.c:753
dtSplitPage+0x7f8/0x3b20 fs/jfs/jfs_dtree.c:1471
dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline]
dtInsert+0x109b/0x5f40 fs/jfs/jfs_dtree.c:871
jfs_create+0x6c8/0xa80 fs/jfs/namei.c:137
lookup_open fs/namei.c:3708 [inline]
open_last_lookups fs/namei.c:3807 [inline]
path_openat+0x14fd/0x3840 fs/namei.c:4043
do_filp_open+0x1fa/0x410 fs/namei.c:4073
do_sys_openat2+0x121/0x1c0 fs/open.c:1435
do_sys_open fs/open.c:1450 [inline]
__do_sys_openat fs/open.c:1466 [inline]
__se_sys_openat fs/open.c:1461 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1461
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc08c43ebe9
RSP: 002b:00007fc08a6a6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc08c665fa0 RCX: 00007fc08c43ebe9
RDX: 0000000000002040 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fc08c4c1e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc08c666038 R14: 00007fc08c665fa0 R15: 00007ffdf7f1e3c8
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Tainted: G W 6.17.0-rc2-syzkaller-00028-gbe48bcf004f9 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:491
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
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: 5889 Comm: udevd Tainted: G W 6.17.0-rc2-syzkaller-00028-gbe48bcf004f9 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:lock_acquire+0x70/0x360 kernel/locking/lockdep.c:5833
Code: f8 08 0f 83 b8 01 00 00 89 c0 48 0f a3 05 c8 4e 81 0d 73 16 e8 c1 14 09 00 84 c0 75 0d f6 05 f7 57 6b 0d 01 0f 84 d7 01 00 00 <83> 3d c9 5f 81 0d 00 0f 84 f0 00 00 00 48 8b b4 24 90 00 00 00 4c
RSP: 0018:ffffc90004e7f2b0 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: b3e7e34663da9a00
RDX: 0000000000000001 RSI: ffffffff8b620ce0 RDI: ffffffff8b620ca0
RBP: ffffffff8190f54d R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101019faa2 R12: 0000000000000000
R13: ffffffff8d866740 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f8fc3bd2880(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8fc3260000 CR3: 0000000021f82000 CR4: 00000000003526f0
Call Trace:
sched_submit_work kernel/sched/core.c:6999 [inline]
rt_mutex_pre_schedule+0x9c/0x1d0 kernel/sched/core.c:7333
rwbase_write_lock+0x178/0x750 kernel/locking/rwbase_rt.c:250
anon_vma_lock_write include/linux/rmap.h:122 [inline]
__anon_vma_prepare+0x21c/0x4a0 mm/rmap.c:209
__vmf_anon_prepare mm/memory.c:3506 [inline]
vmf_anon_prepare mm/internal.h:432 [inline]
do_anonymous_page mm/memory.c:5050 [inline]
do_pte_missing mm/memory.c:4232 [inline]
handle_pte_fault mm/memory.c:6052 [inline]
__handle_mm_fault mm/memory.c:6195 [inline]
handle_mm_fault+0x2a86/0x3400 mm/memory.c:6364
do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74
Code: d4 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 e9 8f d4 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48
RSP: 0018:ffffc90004e7f7f8 EFLAGS: 00050206
RAX: ffffffff84b4f801 RBX: ffff888056168e00 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffff888056168e00 RDI: 00007f8fc3260000
RBP: ffffc90004e7f948 R08: ffff888056168fff R09: 1ffff1100ac2d1ff
R10: dffffc0000000000 R11: ffffed100ac2d200 R12: 1ffff920009cffaf
R13: 00007f8fc3260000 R14: ffffc90004e7fd88 R15: 0000000000000200
copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline]
copy_to_user_iter lib/iov_iter.c:25 [inline]
iterate_ubuf include/linux/iov_iter.h:30 [inline]
iterate_and_advance2 include/linux/iov_iter.h:300 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x24c/0x16f0 lib/iov_iter.c:185
copy_page_to_iter+0x10c/0x1c0 lib/iov_iter.c:362
copy_folio_to_iter include/linux/uio.h:204 [inline]
filemap_read+0x7c3/0x11a0 mm/filemap.c:2763
blkdev_read_iter+0x311/0x440 block/fops.c:849
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x560/0xa30 fs/read_write.c:572
ksys_read+0x14b/0x260 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8fc3cc0407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc4beceef0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f8fc3bd2880 RCX: 00007f8fc3cc0407
RDX: 0000000000000200 RSI: 00007f8fc3260000 RDI: 0000000000000009
RBP: 0000564e63f7d070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000001f6
R13: 000000000000fe00 R14: 0000564e63f7a6c8 R15: 00007f8fc441639c