INFO: task syz-executor.1:28932 blocked for more than 143 seconds.
Not tainted 5.16.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27800 pid:28932 ppid: 3653 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1041
__down_read_common kernel/locking/rwsem.c:1223 [inline]
__down_read kernel/locking/rwsem.c:1232 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1472
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
exit_mm kernel/exit.c:483 [inline]
do_exit+0xa0a/0x2b40 kernel/exit.c:819
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
__do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf6ed2549
RSP: 002b:00000000f58cc5bc EFLAGS: 00000296 ORIG_RAX: 0000000000000009
RAX: fffffffffffffffc RBX: 0000000020000040 RCX: 0000000020000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
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/27:
#0: ffffffff8bb83e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3280:
#0: ffff88814b807098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
2 locks held by kworker/u4:2/16900:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
1 lock held by syz-executor.1/28931:
#0: ffff88807bfb7828 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
#0: ffff88807bfb7828 (&mm->mmap_lock#2){++++}-{3:3}, at: do_mprotect_pkey+0x1e0/0x980 mm/mprotect.c:551
1 lock held by syz-executor.1/28932:
#0: ffff88807bfb7828 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88807bfb7828 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm kernel/exit.c:483 [inline]
#0: ffff88807bfb7828 (&mm->mmap_lock#2){++++}-{3:3}, at: do_exit+0xa0a/0x2b40 kernel/exit.c:819
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc6-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
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:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4031 Comm: kworker/u4:7 Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:rcu_is_watching+0x75/0xb0 kernel/rcu/tree.c:1122
Code: ff df 48 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 19 8b 03 83 e0 01 65 ff 0d 2b 6b 9f 7e <74> 03 5b 5d c3 e8 60 40 9d ff 5b 5d c3 48 89 df e8 c6 66 5b 00 eb
RSP: 0018:ffffc90005717c70 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffff8880b9d3aa50 RCX: 3b11411fbb4f4c1a
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff8b5648a8
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8ff78a07
R10: fffffbfff1fef140 R11: 0000000000000000 R12: ffffc90005717db0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000210
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560111e55f38 CR3: 000000007e161000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock include/linux/rcupdate.h:689 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x132/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 48 89 da mov %rbx,%rdx
3: 48 c1 ea 03 shr $0x3,%rdx
7: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
b: 48 89 d8 mov %rbx,%rax
e: 83 e0 07 and $0x7,%eax
11: 83 c0 03 add $0x3,%eax
14: 38 d0 cmp %dl,%al
16: 7c 04 jl 0x1c
18: 84 d2 test %dl,%dl
1a: 75 19 jne 0x35
1c: 8b 03 mov (%rbx),%eax
1e: 83 e0 01 and $0x1,%eax
21: 65 ff 0d 2b 6b 9f 7e decl %gs:0x7e9f6b2b(%rip) # 0x7e9f6b53
* 28: 74 03 je 0x2d <-- trapping instruction
2a: 5b pop %rbx
2b: 5d pop %rbp
2c: c3 retq
2d: e8 60 40 9d ff callq 0xff9d4092
32: 5b pop %rbx
33: 5d pop %rbp
34: c3 retq
35: 48 89 df mov %rbx,%rdi
38: e8 c6 66 5b 00 callq 0x5b6703
3d: eb .byte 0xeb