INFO: task syz.3.24:6054 blocked for more than 143 seconds.
Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.24 state:D stack:18960 pid:6054 tgid:6045 ppid:5844 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
io_schedule+0x8d/0x110 kernel/sched/core.c:7683
folio_wait_bit_common+0x839/0xee0 mm/filemap.c:1309
folio_wait_writeback+0xb0/0x100 mm/page-writeback.c:3173
__filemap_fdatawait_range+0x17c/0x2b0 mm/filemap.c:533
filemap_write_and_wait_range+0x2d1/0x3a0 mm/filemap.c:694
bch2_write_invalidate_inode_pages_range+0x82/0x120 fs/bcachefs/fs-io-pagecache.c:61
bchfs_fcollapse_finsert+0x282/0x630 fs/bcachefs/fs-io.c:587
bch2_fallocate_dispatch+0x3c9/0x540
vfs_fallocate+0x623/0x7a0 fs/open.c:338
ksys_fallocate fs/open.c:362 [inline]
__do_sys_fallocate fs/open.c:367 [inline]
__se_sys_fallocate fs/open.c:365 [inline]
__x64_sys_fallocate+0xbc/0x110 fs/open.c:365
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9cfb185d29
RSP: 002b:00007f9cfbedd038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f9cfb376160 RCX: 00007f9cfb185d29
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000000000000000b
RBP: 00007f9cfb201b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9cfb376160 R15: 00007ffdbd8f47d8
Showing all locks held in the system:
2 locks held by kworker/u8:0/11:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffff8880b8628948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by getty/5595:
#0: ffff8880355d90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz.3.24/6053:
#0: ffff888028cda420 (sb_writers#16){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3012 [inline]
#0: ffff888028cda420 (sb_writers#16){.+.+}-{0:0}, at: vfs_writev+0x2d6/0xbc0 fs/read_write.c:1048
2 locks held by syz.3.24/6054:
#0: ffff888028cda420 (sb_writers#16){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3012 [inline]
#0: ffff888028cda420 (sb_writers#16){.+.+}-{0:0}, at: vfs_fallocate+0x59d/0x7a0 fs/open.c:337
#1: ffff88807cf48148 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: inode_lock include/linux/fs.h:863 [inline]
#1: ffff88807cf48148 (&sb->s_type->i_mutex_key#23){++++}-{4:4}, at: bch2_fallocate_dispatch+0x1e2/0x540 fs/bcachefs/fs-io.c:800
3 locks held by kworker/1:7/6740:
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000434fc60 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc9000434fc60 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffff88804a779240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x2d1/0x4130 drivers/net/netdevsim/fib.c:1490
1 lock held by syz-executor/7385:
#0: ffff88804e58a0e0 (&type->s_umount_key#110){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804e58a0e0 (&type->s_umount_key#110){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804e58a0e0 (&type->s_umount_key#110){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz-executor/8142:
#0: ffffffff8e93d278 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:302 [inline]
#0: ffffffff8e93d278 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:996
2 locks held by syz.7.364/8466:
#0: ffff88806cea60e0 (&type->s_umount_key#87/1){+.+.}-{4:4}, at: alloc_super+0x221/0x9d0 fs/super.c:344
#1: ffffffff8e7e2e88 (wq_pool_mutex){+.+.}-{4:4}, at: apply_wqattrs_lock kernel/workqueue.c:5170 [inline]
#1: ffffffff8e7e2e88 (wq_pool_mutex){+.+.}-{4:4}, at: __alloc_workqueue+0xa55/0x1f20 kernel/workqueue.c:5724
1 lock held by syz.8.366/8474:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8474 Comm: syz.8.366 Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:jhash2 include/linux/jhash.h:127 [inline]
RIP: 0010:hash_stack lib/stackdepot.c:514 [inline]
RIP: 0010:stack_depot_save_flags+0x7b/0x940 lib/stackdepot.c:614
Code: 00 89 6c 24 10 89 5c 24 04 43 8d 34 09 46 8d 34 cd 7b 71 f5 75 83 fe 04 72 75 44 89 f3 44 89 f0 4c 8b 44 24 08 4c 89 c2 03 02 <03> 5a 04 44 03 72 08 44 89 f7 c1 c7 04 44 29 f0 31 c7 41 01 de 29
RSP: 0018:ffffc90000a18840 EFLAGS: 00000213
RAX: 0000000046d630c2 RBX: 000000008461d718 RCX: 000000002c1ece3d
RDX: ffffc90000a18904 RSI: 0000000000000005 RDI: 00000000b4720c48
RBP: 00000000dc054f08 R08: ffffc90000a188b0 R09: 000000000000000d
R10: dffffc0000000000 R11: fffffbfff203563f R12: ffff88801ac418c0
R13: ffff8880332b4280 R14: 00000000f4a4ab6e R15: ffffc90000a188b0
FS: 00007f51065266c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffa5387098 CR3: 0000000033cae000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_save_stack mm/kasan/common.c:48 [inline]
kasan_save_track+0x51/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2353 [inline]
slab_free mm/slub.c:4609 [inline]
kfree+0x196/0x430 mm/slub.c:4757
security_task_free+0xa4/0x1a0 security/security.c:3181
__put_task_struct+0xf9/0x290 kernel/fork.c:978
put_task_struct include/linux/sched/task.h:144 [inline]
delayed_put_task_struct+0x125/0x300 kernel/exit.c:227
rcu_do_batch kernel/rcu/tree.c:2546 [inline]
rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline]
RIP: 0010:vprintk_emit+0x700/0xa10 kernel/printk/printk.c:2431
Code: 00 e8 f4 c7 20 00 4c 8d bc 24 a0 00 00 00 4d 85 e4 75 07 e8 e2 c7 20 00 eb 06 e8 db c7 20 00 fb 49 bc 00 00 00 00 00 fc ff df <48> c7 c7 60 37 81 8e 31 f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00
RSP: 0018:ffffc9000c0fefc0 EFLAGS: 00000246
RAX: ffffffff819e5c45 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90013fb0000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000c0ff0d0 R08: ffffffff819e5c1e R09: 1ffffffff285af21
R10: dffffc0000000000 R11: fffffbfff285af22 R12: dffffc0000000000
R13: 1ffff9200181fdfc R14: ffffffff819e5a80 R15: ffffc9000c0ff060
_printk+0xd5/0x120 kernel/printk/printk.c:2457
set_capacity_and_notify+0x1ae/0x240 block/genhd.c:86
loop_set_size+0x44/0xb0 drivers/block/loop.c:232
loop_configure+0x9ec/0xeb0 drivers/block/loop.c:1101
lo_ioctl+0x846/0x1f50
blkdev_ioctl+0x57d/0x6a0 block/ioctl.c:693
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f510578592b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f5106525dc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f510578592b
RDX: 0000000000000003 RSI: 0000000000004c00 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000054f2
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f5106525ef0 R14: 00007f5106525eb0 R15: 00007f50fb000000