INFO: task syz.3.180:6176 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.180 state:D stack:22640 pid:6176 tgid:6174 ppid:5351 flags:0x00004004
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
io_schedule+0x8d/0x110 kernel/sched/core.c:9043
folio_wait_bit_common+0x882/0x12b0 mm/filemap.c:1307
release_metapage+0x8c/0x870 fs/jfs/jfs_metapage.c:764
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0xb1d/0x1050 fs/jfs/jfs_metapage.c:644
dtSplitPage+0x8e7/0x3ed0 fs/jfs/jfs_dtree.c:1468
dtSplitUp fs/jfs/jfs_dtree.c:1089 [inline]
dtInsert+0x1500/0x6b00 fs/jfs/jfs_dtree.c:868
jfs_mkdir+0x7fb/0xb90 fs/jfs/namei.c:270
vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4137
do_mkdirat+0x264/0x3a0 fs/namei.c:4160
__do_sys_mkdirat fs/namei.c:4175 [inline]
__se_sys_mkdirat fs/namei.c:4173 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4173
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: 0033:0x7f40bc775bd9
RSP: 002b:00007f40bd465048 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f40bc903f60 RCX: 00007f40bc775bd9
RDX: 0000000000000000 RSI: 0000000020000340 RDI: ffffffffffffff9c
RBP: 00007f40bc7e4aa1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f40bc903f60 R15: 00007fffb6a0a508
Showing all locks held in the system:
4 locks held by kworker/0:0/8:
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/u8:3/51:
4 locks held by kworker/u8:4/61:
#0: ffff88801aef9148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
#0: ffff88801aef9148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc900015d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
#1: ffffc900015d7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2: ffff88802e5e00e0 (&type->s_umount_key#99){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff88805b80e788 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 fs/jfs/inode.c:102
4 locks held by kworker/u8:6/1100:
#0: ffff88801aef9148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
#0: ffff88801aef9148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc900045ffd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
#1: ffffc900045ffd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2: ffff888061f1e0e0 (&type->s_umount_key#99){++++}-{3:3}, at: super_trylock_shared+0x22/0xf0 fs/super.c:562
#3: ffff888076915e48 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x24a/0x590 fs/jfs/inode.c:102
2 locks held by getty/4839:
#0: ffff88802aceb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
4 locks held by syz.3.180/6176:
#0: ffff88802e5e0420 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805b80eb40 (&type->i_mutex_dir_key#16/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
#1: ffff88805b80eb40 (&type->i_mutex_dir_key#16/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3906
#2: ffff88805b80e788 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_mkdir+0x238/0xb90 fs/jfs/namei.c:233
#3: ffff88805b843008 (&jfs_ip->commit_mutex/1){+.+.}-{3:3}, at: jfs_mkdir+0x253/0xb90 fs/jfs/namei.c:234
4 locks held by syz.2.213/6439:
#0: ffff888061f1e420 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888076916200 (&type->i_mutex_dir_key#16/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline]
#1: ffff888076916200 (&type->i_mutex_dir_key#16/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3906
#2: ffff888076915e48 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_mkdir+0x238/0xb90 fs/jfs/namei.c:233
#3: ffff888076911d88 (&jfs_ip->commit_mutex/1){+.+.}-{3:3}, at: jfs_mkdir+0x253/0xb90 fs/jfs/namei.c:234
1 lock held by syz.2.318/7096:
#0: ffff888061f1e0e0 (&type->s_umount_key#99){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888061f1e0e0 (&type->s_umount_key#99){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
1 lock held by syz-executor/7886:
#0: ffffffff8e3392f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8e3392f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:939
1 lock held by syz.3.570/8729:
#0: ffff88802e5e00e0 (&type->s_umount_key#99){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802e5e00e0 (&type->s_umount_key#99){++++}-{3:3}, at: super_lock+0x196/0x400 fs/super.c:120
3 locks held by syz.2.647/8835:
4 locks held by syz.1.649/8841:
4 locks held by syz.4.645/8870:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-syzkaller #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4518 Comm: syslogd Not tainted 6.10.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:175 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2f/0x90 kernel/kcov.c:304
Code: 8b 04 24 65 48 8b 14 25 80 d4 03 00 65 8b 05 70 a9 6d 7e a9 00 01 ff 00 74 10 a9 00 01 00 00 74 5b 83 ba 1c 16 00 00 00 74 52 <8b> 82 f8 15 00 00 83 f8 03 75 47 48 8b 8a 00 16 00 00 44 8b 8a fc
RSP: 0018:ffffc90003157b58 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: ffff88807b3a1e00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003157c90 R08: ffffffff89449b5c R09: 0000000000000000
R10: ffffc90003157bf8 R11: fffff5200062af81 R12: ffffc90003157be4
R13: 1ffff9200062af70 R14: ffffc90003157d20 R15: ffffc90003157d40
FS: 00007f8790f00380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed00ff8 CR3: 000000007ac7a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
sock_read_iter+0x1dc/0x3e0 net/socket.c:1129
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x9bd/0xbc0 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
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: 0033:0x7f8791054b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff3eb48a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f8791054b6a
RDX: 00000000000000ff RSI: 000055cfd2a77950 RDI: 0000000000000000
RBP: 000055cfd2a77910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f87911f33a3 R11: 0000000000000246 R12: 000055cfd2a779b5
R13: 000055cfd2a77950 R14: 0000000000000000 R15: 00007f8791237a80