INFO: task syz-executor.5:10004 blocked for more than 143 seconds.
Not tainted 5.12.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28912 pid:10004 ppid: 8941 flags:0x20000004
Call Trace:
context_switch kernel/sched/core.c:4324 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5075
schedule+0xcf/0x270 kernel/sched/core.c:5154
rwsem_down_read_slowpath+0x4ca/0x980 kernel/locking/rwsem.c:992
__down_read_common kernel/locking/rwsem.c:1213 [inline]
__down_read kernel/locking/rwsem.c:1222 [inline]
down_read+0xe4/0x440 kernel/locking/rwsem.c:1355
inode_lock_shared include/linux/fs.h:785 [inline]
lookup_slow fs/namei.c:1642 [inline]
walk_component+0x409/0x6a0 fs/namei.c:1939
lookup_last fs/namei.c:2396 [inline]
path_lookupat+0x1ba/0x830 fs/namei.c:2420
filename_lookup+0x19f/0x560 fs/namei.c:2453
user_path_at include/linux/namei.h:60 [inline]
do_mount fs/namespace.c:3243 [inline]
__do_sys_mount fs/namespace.c:3454 [inline]
__se_sys_mount fs/namespace.c:3431 [inline]
__ia32_sys_mount+0x1ea/0x300 fs/namespace.c:3431
do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline]
__do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f5f549
RSP: 002b:00000000f55385fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000040
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.5:10006 blocked for more than 143 seconds.
Not tainted 5.12.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27832 pid:10006 ppid: 8941 flags:0x20000004
Call Trace:
context_switch kernel/sched/core.c:4324 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5075
schedule+0xcf/0x270 kernel/sched/core.c:5154
rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write_common kernel/locking/rwsem.c:1258 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:775 [inline]
lock_mount+0x8a/0x2e0 fs/namespace.c:2216
do_new_mount_fc fs/namespace.c:2846 [inline]
do_new_mount fs/namespace.c:2905 [inline]
path_mount+0x14d6/0x1f90 fs/namespace.c:3233
do_mount fs/namespace.c:3246 [inline]
__do_sys_mount fs/namespace.c:3454 [inline]
__se_sys_mount fs/namespace.c:3431 [inline]
__ia32_sys_mount+0x27e/0x300 fs/namespace.c:3431
do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline]
__do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f5f549
RSP: 002b:00000000f55175fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200042c0
RDX: 0000000020002000 RSI: 0000000000000000 RDI: 0000000020002140
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/1653:
#0: ffffffff8bf741a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327
1 lock held by in:imklog/8129:
#0: ffff888013072af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961
5 locks held by syz-executor.5/9995:
1 lock held by syz-executor.5/10004:
#0: ffff888064aa8ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline]
#0: ffff888064aa8ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1642 [inline]
#0: ffff888064aa8ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x409/0x6a0 fs/namei.c:1939
1 lock held by syz-executor.5/10006:
#0: ffff888064aa8ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
#0: ffff888064aa8ed0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2216
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1653 Comm: khungtaskd Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0xfa/0x151 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xd48/0xfb0 kernel/hung_task.c:294
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 446 Comm: kworker/u4:7 Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:177 [inline]
RIP: 0010:kasan_check_range+0xd2/0x180 mm/kasan/generic.c:186
Code: 48 83 c0 01 48 39 d0 74 7a 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 <48> 83 c0 01 48 39 d0 74 50 80 38 00 74 f2 eb d4 41 bc 08 00 00 00
RSP: 0018:ffffc9000256f9c0 EFLAGS: 00000046
RAX: fffffbfff1f56d26 RBX: fffffbfff1f56d27 RCX: ffffffff8158d941
RDX: fffffbfff1f56d27 RSI: 0000000000000008 RDI: ffffffff8fab6930
RBP: fffffbfff1f56d26 R08: 0000000000000000 R09: ffffffff8fab6937
R10: fffffbfff1f56d26 R11: 0000000000000000 R12: ffff888012998000
R13: ffff888012998a02 R14: ffff888012998990 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fabadff3000 CR3: 000000001328d000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
__lock_acquire+0xf61/0x54c0 kernel/locking/lockdep.c:4870
lock_acquire kernel/locking/lockdep.c:5510 [inline]
lock_acquire+0x1ab/0x730 kernel/locking/lockdep.c:5475
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:359 [inline]
batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:438
batadv_nc_worker+0x831/0xe50 net/batman-adv/network-coding.c:716
process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294