INFO: task kworker/u4:1:12 blocked for more than 143 seconds.
Not tainted 6.6.0-rc1-syzkaller-00115-g9fdfb15a3dbf #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:1 state:D stack:24464 pid:12 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x18bd/0x4910 kernel/sched/core.c:6695
schedule+0xbf/0x180 kernel/sched/core.c:6771
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6830
__mutex_lock_common+0xe2b/0x2520 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
hfs_find_init+0x16a/0x1e0
hfs_ext_write_extent+0x128/0x1d0 fs/hfs/extent.c:141
hfs_write_inode+0xb8/0xec0 fs/hfs/inode.c:431
write_inode fs/fs-writeback.c:1456 [inline]
__writeback_single_inode+0x69b/0xf90 fs/fs-writeback.c:1668
writeback_sb_inodes+0x8df/0x11d0 fs/fs-writeback.c:1894
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:1965
wb_writeback+0x45d/0xc50 fs/fs-writeback.c:2072
wb_check_background_flush fs/fs-writeback.c:2142 [inline]
wb_do_writeback fs/fs-writeback.c:2230 [inline]
wb_workfn+0xc67/0xfe0 fs/fs-writeback.c:2257
process_one_work+0x775/0x1110 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0xabb/0x1060 kernel/workqueue.c:2784
kthread+0x2b0/0x340 kernel/kthread.c:388
ret_from_fork+0x44/0x70 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
INFO: task syz-executor.0:5459 blocked for more than 143 seconds.
Not tainted 6.6.0-rc1-syzkaller-00115-g9fdfb15a3dbf #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:25424 pid:5459 ppid:5391 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x18bd/0x4910 kernel/sched/core.c:6695
schedule+0xbf/0x180 kernel/sched/core.c:6771
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6830
__mutex_lock_common+0xe2b/0x2520 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
hfs_find_init+0x16a/0x1e0
hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
hfs_extend_file+0x317/0x1440 fs/hfs/extent.c:401
hfs_bmap_reserve+0xd5/0x3f0 fs/hfs/btree.c:234
__hfs_ext_write_extent+0x22e/0x4f0 fs/hfs/extent.c:121
__hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174
hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
hfs_extend_file+0x340/0x1440 fs/hfs/extent.c:401
hfs_get_block+0x3e0/0xb60 fs/hfs/extent.c:353
__block_write_begin_int+0x551/0x1a20 fs/buffer.c:2107
__block_write_begin fs/buffer.c:2157 [inline]
block_write_begin+0x97/0x1e0 fs/buffer.c:2216
cont_write_begin+0x63f/0x880 fs/buffer.c:2573
hfs_write_begin+0x86/0xd0 fs/hfs/inode.c:58
generic_perform_write+0x317/0x630 mm/filemap.c:3942
generic_file_write_iter+0xab/0x310 mm/filemap.c:4063
call_write_iter include/linux/fs.h:1985 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x77e/0xaf0 fs/read_write.c:584
ksys_write+0x19c/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f61d527cae9
RSP: 002b:00007f61d60890c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f61d539bf80 RCX: 00007f61d527cae9
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00007f61d52c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f61d539bf80 R15: 00007ffe85f058a8
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc1-syzkaller-00115-g9fdfb15a3dbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x494/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x194/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xded/0xe30 kernel/hung_task.c:379
kthread+0x2b0/0x340 kernel/kthread.c:388
ret_from_fork+0x44/0x70 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6630 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller-00115-g9fdfb15a3dbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:__sanitizer_cov_trace_switch+0x4c/0xe0
Code: 0f a3 c1 0f 83 9e 00 00 00 4c 8b 16 4d 85 d2 0f 84 92 00 00 00 4c 8b 04 c5 e8 3c 10 8b 4c 8b 4c 24 20 65 4c 8b 1d 04 ce 76 7e <31> d2 eb 08 48 ff c2 49 39 d2 74 71 4c 8b 74 d6 10 65 8b 05 f4 cd
RSP: 0018:ffffc90004f86ec0 EFLAGS: 00000206
RAX: 0000000000000003 RBX: 0000000000000001 RCX: 000000000000008b
RDX: 0000000000000000 RSI: ffffffff8d19b4e0 RDI: 0000000000000001
RBP: ffffffff8f2a0fe2 R08: 0000000000000005 R09: ffffffff813da499
R10: 0000000000000003 R11: ffff888026c05940 R12: ffffc90004f86fc0
R13: ffffc90004f86fc0 R14: ffffc90004f87010 R15: 1ffff920009f0df8
FS: 00007f6dc50496c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020546000 CR3: 0000000027925000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x1af9/0x2b40 arch/x86/kernel/unwind_orc.c:641
arch_stack_walk+0x142/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
save_stack+0xf6/0x1e0 mm/page_owner.c:128
__reset_page_owner+0x4b/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x8ae/0x9d0 mm/page_alloc.c:2312
free_unref_page+0x33/0x3f0 mm/page_alloc.c:2405
discard_slab mm/slub.c:2116 [inline]
__unfreeze_partials+0x1dc/0x220 mm/slub.c:2655
put_cpu_partial+0x116/0x180 mm/slub.c:2731
__slab_free+0x2b2/0x380 mm/slub.c:3679
qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x147/0x160 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6c/0x3a0 mm/slab.h:762
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc+0x11f/0x2f0 mm/slub.c:3502
kmem_cache_zalloc include/linux/slab.h:710 [inline]
alloc_buffer_head+0x29/0x2a0 fs/buffer.c:3011
folio_alloc_buffers+0x3a5/0x9a0 fs/buffer.c:935
folio_create_empty_buffers+0x36/0x720 fs/buffer.c:1648
ext4_block_write_begin+0x278/0x1540 fs/ext4/inode.c:1024
ext4_da_write_begin+0x5e0/0xa40 fs/ext4/inode.c:2890
generic_perform_write+0x317/0x630 mm/filemap.c:3942
ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299
ext4_file_write_iter+0x1cf/0x1ad0 fs/ext4/file.c:717
call_write_iter include/linux/fs.h:1985 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x77e/0xaf0 fs/read_write.c:584
ksys_write+0x19c/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6dc427cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6dc50490c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6dc439bf80 RCX: 00007f6dc427cae9
RDX: 000000000208e24b RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007f6dc42c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6dc439bf80 R15: 00007fff7f2af588