INFO: task syz-executor.0:5529 blocked for more than 143 seconds.
Not tainted 6.10.0-next-20240726-syzkaller-13921-g668d33c9ff92 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:20448 pid:5529 tgid:5529 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5239 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6603
__schedule_loop kernel/sched/core.c:6680 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6695
bit_wait+0x12/0xd0 kernel/sched/wait_bit.c:199
__wait_on_bit+0xb0/0x2f0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x1d5/0x260 kernel/sched/wait_bit.c:64
wait_on_bit include/linux/wait_bit.h:76 [inline]
gfs2_glock_wait+0xc7/0x2b0 fs/gfs2/glock.c:1363
gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
__gfs2_lookup+0x11b/0x280 fs/gfs2/inode.c:905
__lookup_slow+0x28c/0x3f0 fs/namei.c:1718
lookup_slow+0x53/0x70 fs/namei.c:1735
walk_component+0x2e1/0x410 fs/namei.c:2039
lookup_last fs/namei.c:2542 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2566
filename_lookup+0x256/0x610 fs/namei.c:2595
user_path_at+0x3a/0x60 fs/namei.c:3002
ksys_umount fs/namespace.c:2033 [inline]
__do_sys_umount fs/namespace.c:2041 [inline]
__se_sys_umount fs/namespace.c:2039 [inline]
__x64_sys_umount+0xf1/0x170 fs/namespace.c:2039
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: 0033:0x7f7337a7f197
RSP: 002b:00007ffe5f064ab8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f7337ac93b9 RCX: 00007f7337a7f197
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe5f064b70
RBP: 00007ffe5f064b70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe5f065c60
R13: 00007f7337ac93b9 R14: 0000555557376430 R15: 0000000000000002
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e937a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6695
2 locks held by getty/4981:
#0: ffff88802ae8d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
1 lock held by syz-executor.0/5529:
#0: ffff888011ea87f8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:809 [inline]
#0: ffff888011ea87f8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1734
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-next-20240726-syzkaller-13921-g668d33c9ff92 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
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: 4669 Comm: klogd Not tainted 6.10.0-next-20240726-syzkaller-13921-g668d33c9ff92 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:lock_acquire+0x2a9/0x550 kernel/locking/lockdep.c:5826
Code: 66 43 c7 44 25 15 00 00 43 c6 44 25 17 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 00 01 00 00 0f 85 95 02 00 00 48 8d 65 d8 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 65 8b 05 02 d9 92 7e 85
RSP: 0018:ffffc9000301f698 EFLAGS: 00000246
RAX: ea3d3fe03ba0fe00 RBX: ffff88807d8bbc2c RCX: ea3d3fe03ba0fe00
RDX: dffffc0000000000 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c607cc0
RBP: ffffc9000301f6b8 R08: ffffffff93737817 R09: 1ffffffff26e6f02
R10: dffffc0000000000 R11: fffffbfff26e6f03 R12: 1ffff92000603eb4
R13: dffffc0000000000 R14: ffffc9000301f5c0 R15: 0000000000000246
FS: 00007f8b5225d380(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559a6248b600 CR3: 000000007d4c0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__fs_reclaim_acquire mm/page_alloc.c:3823 [inline]
fs_reclaim_acquire+0x88/0x140 mm/page_alloc.c:3837
might_alloc include/linux/sched/mm.h:334 [inline]
slab_pre_alloc_hook mm/slub.c:3939 [inline]
slab_alloc_node mm/slub.c:4017 [inline]
__do_kmalloc_node mm/slub.c:4157 [inline]
__kmalloc_node_track_caller_noprof+0xab/0x440 mm/slub.c:4177
kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:674
alloc_skb include/linux/skbuff.h:1320 [inline]
alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6526
sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2815
unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:2030
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2204
__do_sys_sendto net/socket.c:2216 [inline]
__se_sys_sendto net/socket.c:2212 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2212
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: 0033:0x7f8b523bf9b5
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:00007ffca70e6c48 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f8b523bf9b5
RDX: 000000000000004c RSI: 000055b1be5c42d0 RDI: 0000000000000003
RBP: 000055b1be5bf910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f8b5254d212 R14: 00007ffca70e6d48 R15: 0000000000000000