INFO: task syz-executor.2:4204 blocked for more than 143 seconds. Not tainted 5.16.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26944 pid: 4204 ppid: 3623 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4900 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 __lock_sock+0x13d/0x260 net/core/sock.c:2750 lock_sock_nested+0xd6/0xf0 net/core/sock.c:3296 lock_sock include/net/sock.h:1667 [inline] tcp_sendmsg+0x1d/0x40 net/ipv4/tcp.c:1439 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2410 ___sys_sendmsg+0xf3/0x170 net/socket.c:2464 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2493 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fcfd7ec6e99 RSP: 002b:00007fcfd67d9168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fcfd7fda1d0 RCX: 00007fcfd7ec6e99 RDX: 0000000024004800 RSI: 00000000200000c0 RDI: 000000000000000c RBP: 00007fcfd7f20ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe08eff05f R14: 00007fcfd67d9300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 2 locks held by kworker/u4:4/949: 1 lock held by klogd/2961: 2 locks held by getty/3282: #0: ffff888023812098 (&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 1 lock held by syz-executor.2/4204: #0: ffff888075a0d530 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline] #0: ffff888075a0d530 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x1d/0x40 net/ipv4/tcp.c:1439 1 lock held by syz-executor.2/4205: #0: ffff888075a0d530 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline] #0: ffff888075a0d530 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: sock_setsockopt+0x1e3/0x2cb0 net/core/sock.c:1041 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.16.0-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+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: 3836 Comm: kworker/u4:6 Not tainted 5.16.0-rc7-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:84 [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:180 [inline] RIP: 0010:kasan_check_range+0xc8/0x180 mm/kasan/generic.c:189 Code: 38 00 74 ed 48 8d 50 08 eb 09 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 RSP: 0018:ffffc90002c7fa28 EFLAGS: 00000083 RAX: fffffbfff1ff375b RBX: fffffbfff1ff375c RCX: ffffffff815c2f5f RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8ff9bad8 RBP: fffffbfff1ff375b R08: 0000000000000000 R09: ffffffff8ff9badf R10: fffffbfff1ff375b R11: 0000000000000001 R12: 0000000000000002 R13: ffff888073950a88 R14: 00000000000006fd R15: ffff888073950aa8 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00057e000 CR3: 0000000023843000 CR4: 00000000003506e0 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] hlock_class kernel/locking/lockdep.c:199 [inline] mark_lock+0xef/0x17b0 kernel/locking/lockdep.c:4583 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4206 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4224 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4292 [inline] lockdep_hardirqs_on_prepare+0x135/0x400 kernel/locking/lockdep.c:4244 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __local_bh_enable_ip+0xa0/0x120 kernel/softirq.c:388 spin_unlock_bh include/linux/spinlock.h:394 [inline] batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:475 batadv_nc_worker+0x930/0xfa0 net/batman-adv/network-coding.c:726 process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298 worker_thread+0x65d/0x1130 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): 0: 38 00 cmp %al,(%rax) 2: 74 ed je 0xfffffff1 4: 48 8d 50 08 lea 0x8(%rax),%rdx 8: eb 09 jmp 0x13 a: 48 83 c0 01 add $0x1,%rax e: 48 39 d0 cmp %rdx,%rax 11: 74 7a je 0x8d 13: 80 38 00 cmpb $0x0,(%rax) 16: 74 f2 je 0xa 18: 48 89 c2 mov %rax,%rdx 1b: b8 01 00 00 00 mov $0x1,%eax 20: 48 85 d2 test %rdx,%rdx 23: 75 56 jne 0x7b 25: 5b pop %rbx 26: 5d pop %rbp 27: 41 5c pop %r12 29: c3 retq * 2a: 48 85 d2 test %rdx,%rdx <-- trapping instruction 2d: 74 5e je 0x8d 2f: 48 01 ea add %rbp,%rdx 32: eb 09 jmp 0x3d 34: 48 83 c0 01 add $0x1,%rax 38: 48 39 d0 cmp %rdx,%rax 3b: 74 50 je 0x8d 3d: 80 38 00 cmpb $0x0,(%rax)