INFO: task syz-executor850:6551 blocked for more than 143 seconds.
Not tainted 5.15.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor850 state:D stack:25584 pid: 6551 ppid: 6532 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]
lock_mount+0x6a/0x2f0 fs/namespace.c:2242
do_new_mount_fc fs/namespace.c:2931 [inline]
do_new_mount fs/namespace.c:2990 [inline]
path_mount+0x22c7/0x2c30 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount+0x308/0x3c0 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: 0033:0x7f1d36799a2a
RSP: 002b:00007f1d3673d078 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1d3673d0d0 RCX: 00007f1d36799a2a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1d3673d090
RBP: 0000000000000003 R08: 00007f1d3673d0d0 R09: 00007f1d3673d6bc
R10: 0000000000000000 R11: 0000000000000286 R12: 00007f1d3673d090
R13: 0000000020000248 R14: 0000000000000003 R15: 0000000000000004
INFO: task syz-executor850:6570 blocked for more than 144 seconds.
Not tainted 5.15.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor850 state:D stack:27960 pid: 6570 ppid: 6532 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: 0033:0x7f1d36798599
RSP: 002b:00007f1d366fb208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f1d368153e8 RCX: 00007f1d36798599
RDX: 00007f1d366fb700 RSI: 405fa033c806de61 RDI: 0000000020000040
RBP: 00007f1d368153e0 R08: 00007f1d366fb700 R09: 0000000000000000
R10: 00007f1d366fb700 R11: 0000000000000246 R12: 00007f1d368153ec
R13: 00007ffee438344f R14: 00007f1d366fb300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91c8c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by kswapd0/262:
1 lock held by kswapd1/263:
1 lock held by in:imklog/6211:
#0: ffff888079dfa0f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
1 lock held by syz-executor850/6562:
1 lock held by syz-executor850/6557:
1 lock held by syz-executor850/6558:
1 lock held by syz-executor850/6563:
1 lock held by syz-executor850/6561:
1 lock held by syz-executor850/6551:
#0: ffff88806af08c30 (&type->i_mutex_dir_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:786 [inline]
#0: ffff88806af08c30 (&type->i_mutex_dir_key#7){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2242
1 lock held by syz-executor850/6570:
#0: ffff88806af08c30 (&type->i_mutex_dir_key#7){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:796 [inline]
#0: ffff88806af08c30 (&type->i_mutex_dir_key#7){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline]
#0: ffff88806af08c30 (&type->i_mutex_dir_key#7){++++}-{3:3}, at: walk_component+0x508/0x790 fs/namei.c:1970
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc5-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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6562 Comm: syz-executor850 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:validate_chain+0x0/0x8240 kernel/locking/lockdep.c:3745
Code: 48 c7 c1 98 39 dc 8d 80 e1 07 80 c1 03 38 c1 7c 81 48 c7 c7 98 39 dc 8d e8 fd 02 69 00 e9 70 ff ff ff e8 93 62 94 08 0f 1f 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 02
RSP: 0018:ffffc90002e8ef58 EFLAGS: 00000082
RAX: 1ffffffff1ed07c4 RBX: 00000000000002c4 RCX: e511bf3370b91992
RDX: 0000000000000000 RSI: ffff88801d2526c8 RDI: ffff88801d251c80
RBP: ffffc90002e8f0b0 R08: dffffc0000000000 R09: fffffbfff1fa37e4
R10: fffffbfff1fa37e4 R11: 0000000000000000 R12: ffff88801d251c80
R13: ffff88801d2526c8 R14: ffffffff8f683e20 R15: e511bf3370b91992
FS: 00007f1d3671c700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f59e0609b04 CR3: 0000000072681000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1382/0x2b00 kernel/locking/lockdep.c:5015
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
__raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:363 [inline]
__find_get_block_slow+0xdf/0x6e0 fs/buffer.c:206
__find_get_block+0x37d/0xc60 fs/buffer.c:1308
__getblk_slow fs/buffer.c:1037 [inline]
__getblk_gfp+0x13e/0x2d0 fs/buffer.c:1334
__bread_gfp+0x2a/0x370 fs/buffer.c:1379
sb_bread include/linux/buffer_head.h:303 [inline]
get_branch fs/minix/itree_common.c:46 [inline]
get_block+0x2ea/0x14b0 fs/minix/itree_common.c:166
block_read_full_page+0x2d8/0xd80 fs/buffer.c:2288
do_read_cache_page+0xb01/0xe10 mm/filemap.c:3458
read_mapping_page include/linux/pagemap.h:515 [inline]
dir_get_page fs/minix/dir.c:70 [inline]
minix_find_entry+0x1a7/0x730 fs/minix/dir.c:170
minix_inode_by_name+0x94/0x420 fs/minix/dir.c:454
minix_lookup+0xbf/0x150 fs/minix/namei.c:30
__lookup_slow+0x27f/0x3d0 fs/namei.c:1657
lookup_slow fs/namei.c:1674 [inline]
walk_component+0x516/0x790 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: 0033:0x7f1d36798599
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1d3671c208 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f1d368153d8 RCX: 00007f1d36798599
RDX: 00007f1d3671c700 RSI: 405fa00f2806de61 RDI: 0000000020000040
RBP: 00007f1d368153d0 R08: 00007f1d3671c700 R09: 0000000000000000
R10: 00007f1d3671c700 R11: 0000000000000246 R12: 00007f1d368153dc
R13: 00007ffee438344f R14: 00007f1d3671c300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 48 c7 c1 98 39 dc 8d mov $0xffffffff8ddc3998,%rcx
7: 80 e1 07 and $0x7,%cl
a: 80 c1 03 add $0x3,%cl
d: 38 c1 cmp %al,%cl
f: 7c 81 jl 0xffffff92
11: 48 c7 c7 98 39 dc 8d mov $0xffffffff8ddc3998,%rdi
18: e8 fd 02 69 00 callq 0x69031a
1d: e9 70 ff ff ff jmpq 0xffffff92
22: e8 93 62 94 08 callq 0x89462ba
27: 0f 1f 00 nopl (%rax)
* 2a: 55 push %rbp <-- trapping instruction
2b: 48 89 e5 mov %rsp,%rbp
2e: 41 57 push %r15
30: 41 56 push %r14
32: 41 55 push %r13
34: 41 54 push %r12
36: 53 push %rbx
37: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
3b: 48 rex.W
3c: 81 .byte 0x81
3d: ec in (%dx),%al
3e: e0 02 loopne 0x42