INFO: task syz-executor.4:14728 blocked for more than 143 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28496 pid:14728 ppid: 6581 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
rwsem_down_write_slowpath+0xdb7/0x1490 kernel/locking/rwsem.c:1107
__down_write_common kernel/locking/rwsem.c:1262 [inline]
__down_write kernel/locking/rwsem.c:1271 [inline]
down_write_nested+0x171/0x180 kernel/locking/rwsem.c:1628
lock_rename+0x182/0x1a0
do_renameat2+0x75d/0x1450 fs/namei.c:4720
__do_sys_rename fs/namei.c:4825 [inline]
__se_sys_rename fs/namei.c:4823 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:4823
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff37a9c7ae9
RSP: 002b:00007ff377efb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007ff37aadb0e0 RCX: 00007ff37a9c7ae9
RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000020000480
RBP: 00007ff37aa21f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5773760f R14: 00007ff377efb300 R15: 0000000000022000
INFO: task syz-executor.4:14732 blocked for more than 143 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28304 pid:14732 ppid: 6581 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
rwsem_down_read_slowpath+0x541/0x980 kernel/locking/rwsem.c:993
__down_read_common+0xaa/0x450 kernel/locking/rwsem.c:1214
inode_lock_shared include/linux/fs.h:796 [inline]
lookup_slow fs/namei.c:1673 [inline]
walk_component+0x508/0x790 fs/namei.c:1970
lookup_last fs/namei.c:2425 [inline]
path_lookupat+0x19d/0x6c0 fs/namei.c:2449
filename_lookup+0x270/0x640 fs/namei.c:2478
user_path_at_empty+0x40/0x1a0 fs/namei.c:2801
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3328 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount+0x2cd/0x3c0 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff37a9c7ae9
RSP: 002b:00007ff377eda188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff37aadb1a0 RCX: 00007ff37a9c7ae9
RDX: 0000000020000280 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 00007ff37aa21f25 R08: 00000000200002c0 R09: 0000000000000000
R10: 0000000001000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5773760f R14: 00007ff377eda300 R15: 0000000000022000
INFO: task syz-executor.4:14737 blocked for more than 144 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28208 pid:14737 ppid: 6581 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
rwsem_down_read_slowpath+0x541/0x980 kernel/locking/rwsem.c:993
__down_read_common+0xaa/0x450 kernel/locking/rwsem.c:1214
inode_lock_shared include/linux/fs.h:796 [inline]
lookup_slow fs/namei.c:1673 [inline]
walk_component+0x508/0x790 fs/namei.c:1970
lookup_last fs/namei.c:2425 [inline]
path_lookupat+0x19d/0x6c0 fs/namei.c:2449
filename_lookup+0x270/0x640 fs/namei.c:2478
user_path_at_empty+0x40/0x1a0 fs/namei.c:2801
do_readlinkat+0x11b/0x3b0 fs/stat.c:443
__do_sys_readlinkat fs/stat.c:470 [inline]
__se_sys_readlinkat fs/stat.c:467 [inline]
__x64_sys_readlinkat+0x96/0xb0 fs/stat.c:467
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff37a9c7ae9
RSP: 002b:00007ff377eb9188 EFLAGS: 00000246 ORIG_RAX: 000000000000010b
RAX: ffffffffffffffda RBX: 00007ff37aadb260 RCX: 00007ff37a9c7ae9
RDX: 0000000020000380 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00007ff37aa21f25 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000cf R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5773760f R14: 00007ff377eb9300 R15: 0000000000022000
INFO: task syz-executor.4:14779 blocked for more than 144 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26032 pid:14779 ppid: 6581 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
rwsem_down_read_slowpath+0x541/0x980 kernel/locking/rwsem.c:993
__down_read_common+0xaa/0x450 kernel/locking/rwsem.c:1214
inode_lock_shared include/linux/fs.h:796 [inline]
lookup_slow fs/namei.c:1673 [inline]
walk_component+0x508/0x790 fs/namei.c:1970
lookup_last fs/namei.c:2425 [inline]
path_lookupat+0x19d/0x6c0 fs/namei.c:2449
filename_lookup+0x270/0x640 fs/namei.c:2478
user_path_at_empty+0x40/0x1a0 fs/namei.c:2801
user_path_at include/linux/namei.h:57 [inline]
__do_sys_chdir fs/open.c:489 [inline]
__se_sys_chdir+0xa4/0x2a0 fs/open.c:483
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff37a9c7ae9
RSP: 002b:00007ff377e98188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007ff37aadb320 RCX: 00007ff37a9c7ae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007ff37aa21f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5773760f R14: 00007ff377e98300 R15: 0000000000022000
INFO: task syz-executor.4:14782 blocked for more than 144 seconds.
Not tainted 5.15.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27664 pid:14782 ppid: 6581 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6287
schedule+0x14b/0x210 kernel/sched/core.c:6366
rwsem_down_write_slowpath+0xdb7/0x1490 kernel/locking/rwsem.c:1107
__down_write_common kernel/locking/rwsem.c:1262 [inline]
__down_write kernel/locking/rwsem.c:1271 [inline]
down_write+0x165/0x170 kernel/locking/rwsem.c:1518
inode_lock include/linux/fs.h:786 [inline]
open_last_lookups fs/namei.c:3349 [inline]
path_openat+0x84a/0x3670 fs/namei.c:3558
do_filp_open+0x277/0x4f0 fs/namei.c:3588
do_sys_openat2+0x13b/0x500 fs/open.c:1200
do_sys_open fs/open.c:1216 [inline]
__do_sys_creat fs/open.c:1290 [inline]
__se_sys_creat fs/open.c:1284 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1284
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff37a9c7ae9
RSP: 002b:00007ff377e77188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007ff37aadb3e0 RCX: 00007ff37a9c7ae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 00007ff37aa21f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5773760f R14: 00007ff377e77300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8c91c980 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by kswapd1/262:
5 locks held by kworker/u4:3/986:
1 lock held by in:imklog/6232:
#0: ffff8880784345f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
2 locks held by kworker/u4:1/609:
#0: ffff8880b9d31558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:474
#1: ffff8880b9d1f888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880
2 locks held by syz-executor.4/14723:
2 locks held by syz-executor.4/14728:
#0: ffff88807b9f4460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:376
#1: ffff88806c53e6c0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: lock_rename+0x182/0x1a0
1 lock held by syz-executor.4/14732:
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline]
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline]
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x508/0x790 fs/namei.c:1970
1 lock held by syz-executor.4/14737:
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline]
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline]
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x508/0x790 fs/namei.c:1970
1 lock held by syz-executor.4/14779:
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline]
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline]
#0: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x508/0x790 fs/namei.c:1970
2 locks held by syz-executor.4/14782:
#0: ffff88807b9f4460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:376
#1: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline]
#1: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3349 [inline]
#1: ffff88806c53e6c0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x84a/0x3670 fs/namei.c:3558
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6221 Comm: kworker/1:4 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: 0x0 (wg-crypt-wg1)
RIP: 0010:get_running_cputimer include/linux/sched/cputime.h:87 [inline]
RIP: 0010:account_group_exec_runtime include/linux/sched/cputime.h:172 [inline]
RIP: 0010:update_curr+0x5d6/0xd00 kernel/sched/fair.c:854
Code: 08 00 74 08 48 89 df e8 a8 99 71 00 48 8b 2b 48 8d 9d 90 01 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 8a 04 08 <84> c0 0f 85 1f 01 00 00 83 3b 00 0f 84 c3 fd ff ff 48 8b 1c 24 48
RSP: 0018:ffffc9000d367a18 EFLAGS: 00000802
RAX: 1ffff1100f695100 RBX: ffff88807b4a8810 RCX: dffffc0000000000
RDX: 1ffff92001a6cf2c RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff88807b4a8680 R08: dffffc0000000000 R09: ffffed10173a64a2
R10: ffffed10173a64a2 R11: 0000000000000000 R12: ffff8880b9d31628
R13: 0000005cb3a9563b R14: 1ffff110173a62c5 R15: ffff888088fad690
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5b94390000 CR3: 00000000330af000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
dequeue_entity+0x27/0xcd0 kernel/sched/fair.c:4392
dequeue_task_fair+0x28f/0x1390 kernel/sched/fair.c:5720
dequeue_task kernel/sched/core.c:1996 [inline]
deactivate_task kernel/sched/core.c:2010 [inline]
__schedule+0x63c/0x1460 kernel/sched/core.c:6241
schedule+0x14b/0x210 kernel/sched/core.c:6366
worker_thread+0xfd5/0x1320 kernel/workqueue.c:2465
kthread+0x453/0x480 kernel/kthread.c:319
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 08 00 or %al,(%rax)
2: 74 08 je 0xc
4: 48 89 df mov %rbx,%rdi
7: e8 a8 99 71 00 callq 0x7199b4
c: 48 8b 2b mov (%rbx),%rbp
f: 48 8d 9d 90 01 00 00 lea 0x190(%rbp),%rbx
16: 48 89 d8 mov %rbx,%rax
19: 48 c1 e8 03 shr $0x3,%rax
1d: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
24: fc ff df
27: 8a 04 08 mov (%rax,%rcx,1),%al
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 1f 01 00 00 jne 0x151
32: 83 3b 00 cmpl $0x0,(%rbx)
35: 0f 84 c3 fd ff ff je 0xfffffdfe
3b: 48 8b 1c 24 mov (%rsp),%rbx
3f: 48 rex.W