INFO: task kworker/u8:6:1050 blocked for more than 143 seconds.
Not tainted 6.10.0-rc6-syzkaller-00212-g1dd28064d416 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6 state:D stack:19096 pid:1050 tgid:1050 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-bcachefs-1)
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
__closure_sync+0x259/0x2f0 lib/closure.c:146
closure_sync include/linux/closure.h:194 [inline]
__bch2_write+0x54a5/0x5c40 fs/bcachefs/io_write.c:1506
bch2_write+0x947/0x1670 fs/bcachefs/io_write.c:1634
closure_queue include/linux/closure.h:269 [inline]
closure_call include/linux/closure.h:425 [inline]
bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:460 [inline]
__bch2_writepage+0x1416/0x2b50 fs/bcachefs/fs-io-buffered.c:607
write_cache_pages+0xd0/0x230 mm/page-writeback.c:2613
bch2_writepages+0x14f/0x380 fs/bcachefs/fs-io-buffered.c:650
do_writepages+0x359/0x870 mm/page-writeback.c:2656
__writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1651
writeback_sb_inodes+0x99c/0x1380 fs/fs-writeback.c:1947
__writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2018
wb_writeback+0x495/0xd40 fs/fs-writeback.c:2129
wb_check_old_data_flush fs/fs-writeback.c:2233 [inline]
wb_do_writeback fs/fs-writeback.c:2286 [inline]
wb_workfn+0xba1/0x1090 fs/fs-writeback.c:2314
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz-executor154:5085 blocked for more than 143 seconds.
Not tainted 6.10.0-rc6-syzkaller-00212-g1dd28064d416 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor154 state:D stack:14320 pid:5085 tgid:5085 ppid:5084 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
__closure_sync+0x259/0x2f0 lib/closure.c:146
closure_sync include/linux/closure.h:194 [inline]
__bch2_write+0x54a5/0x5c40 fs/bcachefs/io_write.c:1506
bch2_write+0x947/0x1670 fs/bcachefs/io_write.c:1634
closure_queue include/linux/closure.h:269 [inline]
closure_call include/linux/closure.h:425 [inline]
bch2_writepage_do_io fs/bcachefs/fs-io-buffered.c:460 [inline]
__bch2_writepage+0x1416/0x2b50 fs/bcachefs/fs-io-buffered.c:607
write_cache_pages+0xd0/0x230 mm/page-writeback.c:2613
bch2_writepages+0x14f/0x380 fs/bcachefs/fs-io-buffered.c:650
do_writepages+0x359/0x870 mm/page-writeback.c:2656
filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397
__filemap_fdatawrite_range mm/filemap.c:430 [inline]
file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788
bch2_fsync+0x93/0x130 fs/bcachefs/fs-io.c:197
generic_write_sync include/linux/fs.h:2794 [inline]
bch2_buffered_write fs/bcachefs/fs-io-buffered.c:1128 [inline]
bch2_write_iter+0x262e/0x2840 fs/bcachefs/fs-io-buffered.c:1136
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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: 0033:0x7f950fe0fb59
RSP: 002b:00007ffed502e5b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f950fe0fb59
RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000005
RBP: 00007f950fe945f0 R08: 000055558d9ba4c0 R09: 000055558d9ba4c0
R10: 000055558d9ba4c0 R11: 0000000000000246 R12: 00007ffed502e5e0
R13: 00007ffed502e808 R14: 431bde82d7b634db R15: 00007f950fe5803b
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:6/1050:
#0: ffff888017a82148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
#0: ffff888017a82148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc900043d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
#1: ffffc900043d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2: ffff88807c9260e0 (&type->s_umount_key#44){.+.+}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
1 lock held by klogd/4525:
#0: ffff8880b953e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
2 locks held by getty/4843:
#0: ffff88802a7c40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
1 lock held by syz-executor154/5085:
#0: ffff88807c926420 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2854 [inline]
#0: ffff88807c926420 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-syzkaller-00212-g1dd28064d416 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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 PID: 4525 Comm: klogd Not tainted 6.10.0-rc6-syzkaller-00212-g1dd28064d416 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:lookup_address_in_pgd_attr+0x3f6/0x860 arch/x86/mm/pat/set_memory.c:708
Code: 12 41 81 e4 f8 0f 00 00 49 01 ec 4c 89 e3 48 c1 eb 03 48 b8 00 00 00 00 00 fc ff df 80 3c 03 00 74 08 4c 89 e7 e8 2a fc b5 00 <49> 8b 2c 24 48 89 ee 48 83 e6 9f 31 ff e8 48 95 53 00 48 83 e5 9f
RSP: 0018:ffffc9000310f128 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: 1ffff11002bdc3de RCX: ffff88807ee0bc00
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888015ee1000 R08: ffffffff81429610 R09: 1ffffffff25ee2b2
R10: dffffc0000000000 R11: fffffbfff25ee2b3 R12: ffff888015ee1ef0
R13: 000ffffffffff000 R14: ffff888000000000 R15: ffff88823bd18000
FS: 00007fad3012f380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056072d59d680 CR3: 000000007ea26000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lookup_address_in_pgd arch/x86/mm/pat/set_memory.c:732 [inline]
lookup_address+0xca/0x120 arch/x86/mm/pat/set_memory.c:745
kfence_protect_page arch/x86/include/asm/kfence.h:44 [inline]
kfence_unprotect+0xb3/0x290 mm/kfence/core.c:247
kfence_guarded_alloc+0x3cf/0xcd0 mm/kfence/core.c:435
__kfence_alloc+0x343/0x370 mm/kfence/core.c:1112
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:3986 [inline]
kmem_cache_alloc_node_noprof+0x26f/0x320 mm/slub.c:4045
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:656
alloc_skb include/linux/skbuff.h:1308 [inline]
alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6504
sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2794
unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:1976
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2192
__do_sys_sendto net/socket.c:2204 [inline]
__se_sys_sendto net/socket.c:2200 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2200
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: 0033:0x7fad302919b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff3fef48c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fad302919b5
RDX: 000000000000008b RSI: 0000563c4a1f6120 RDI: 0000000000000003
RBP: 0000563c4a1f1910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007fad3041f212 R14: 00007fff3fef49c8 R15: 0000000000000000
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.923 msecs