INFO: task syz-executor.4:7639 blocked for more than 143 seconds.
Not tainted 5.16.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27696 pid: 7639 ppid: 7348 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x5e2/0xb00 kernel/locking/rwsem.c:1041
__down_read_common+0xaa/0x450 kernel/locking/rwsem.c:1223
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0x6cf/0x10c0 arch/x86/mm/fault.c:1348
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0xa1/0x1e0 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30
RIP: 0033:0x7f4a70d56d20
RSP: 002b:00007f4a6f699ce8 EFLAGS: 00010206
RAX: 00000000200000c0 RBX: 00000000000003ff RCX: 00000000000000c0
RDX: 00000000000003ff RSI: 00000000200004bf RDI: 00000000200000c0
RBP: 00000000200000c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000480 R11: 00000000200004bf R12: 0000000000000000
R13: 00007f4a6f699d40 R14: 00007f4a6f69a300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1de40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3281:
#0: ffff88807f3fa098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b932e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.4/7623:
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm+0xd4/0x2f0 kernel/exit.c:483
1 lock held by syz-executor.4/7625:
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm+0xd4/0x2f0 kernel/exit.c:483
1 lock held by syz-executor.4/7638:
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm+0xd4/0x2f0 kernel/exit.c:483
1 lock held by syz-executor.4/7639:
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x6cf/0x10c0 arch/x86/mm/fault.c:1348
1 lock held by syz-executor.4/7640:
1 lock held by syz-executor.4/7641:
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm+0xd4/0x2f0 kernel/exit.c:483
1 lock held by syz-executor.4/7642:
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88801ee25528 (&mm->mmap_lock#2){++++}-{3:3}, at: exit_mm+0xd4/0x2f0 kernel/exit.c:483
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-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:111
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+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 50 Comm: kworker/u4:2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:mark_lock+0x8/0x1e00 kernel/locking/lockdep.c:4566
Code: c1 03 38 c1 0f 8c 6f ff ff ff 4c 89 ff e8 e0 f5 69 00 e9 62 ff ff ff e8 36 15 ac 08 66 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec c0 01 00 00 65 48 8b 04 25 28
RSP: 0018:ffffc9000137f8e0 EFLAGS: 00000046
RAX: 0000000000000002 RBX: ffff8880139ee1d0 RCX: 00000000ffffffff
RDX: 0000000000000008 RSI: ffff8880139ee1b0 RDI: ffff8880139ed700
RBP: ffffc9000137f8f0 R08: dffffc0000000000 R09: fffffbfff1ff39f9
R10: fffffbfff1ff39f9 R11: 0000000000000000 R12: 000000000000000a
R13: ffff8880139ee1b0 R14: ffff8880139ed700 R15: ffff8880139ee1d0
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055deea749600 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4526 [inline]
__lock_acquire+0xd38/0x2b00 kernel/locking/lockdep.c:4981
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5637
rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:268
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:723
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 38 c1 cmp %al,%cl
2: 0f 8c 6f ff ff ff jl 0xffffff77
8: 4c 89 ff mov %r15,%rdi
b: e8 e0 f5 69 00 callq 0x69f5f0
10: e9 62 ff ff ff jmpq 0xffffff77
15: e8 36 15 ac 08 callq 0x8ac1550
1a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
20: 55 push %rbp
21: 48 89 e5 mov %rsp,%rbp
24: 41 57 push %r15
26: 41 56 push %r14
* 28: 41 55 push %r13 <-- trapping instruction
2a: 41 54 push %r12
2c: 53 push %rbx
2d: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp
31: 48 81 ec c0 01 00 00 sub $0x1c0,%rsp
38: 65 gs
39: 48 rex.W
3a: 8b .byte 0x8b
3b: 04 25 add $0x25,%al
3d: 28 .byte 0x28