kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 27512 Comm: syz-executor.2 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:perf_trace_lock_acquire+0x9d/0x530 include/trace/events/lock.h:13 Code: 04 f1 f1 04 f2 c7 40 08 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 40 ff ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 4f 03 00 00 49 8b 7d 18 48 c7 c0 80 14 6a 88 48 RSP: 0018:ffff888049d3fab0 EFLAGS: 00010006 RAX: 0000000000000006 RBX: ffff88809ff54fa8 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000018 RDI: ffffffff89f6d460 RBP: ffff888049d3fb98 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff89f6d460 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. R13: 0000000000000018 R14: 0000000000000000 R15: ffff888049d3fb70 FS: 00007f46246d2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009758d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x298/0x3c0 kernel/locking/lockdep.c:3907 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152 prepare_to_wait+0x7c/0x2a0 kernel/sched/wait.c:230 nr_accept+0x215/0x630 net/netrom/af_netrom.c:796 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 __sys_accept4+0x322/0x5f0 net/socket.c:1701 CPU: 0 PID: 27563 Comm: syz-executor.3 Not tainted 4.19.206-syzkaller #0 __do_sys_accept4 net/socket.c:1736 [inline] __se_sys_accept4 net/socket.c:1733 [inline] __x64_sys_accept4+0x93/0xf0 net/socket.c:1733 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 entry_SYSCALL_64_after_hwframe+0x49/0xbe fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0xf lib/fault-inject.c:149 RIP: 0033:0x7f462719d739 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:00007f46246d2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000120 RAX: ffffffffffffffda RBX: 00007f46272a20f0 RCX: 00007f462719d739 __should_failslab+0x115/0x180 mm/failslab.c:32 RDX: 0000000020000300 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007f46271f7cc4 R08: 0000000000000000 R09: 0000000000000000 should_failslab+0x5/0x10 mm/slab_common.c:1590 R10: 0000000000000800 R11: 0000000000000246 R12: 00007f46272a20f0 R13: 00007fff804deabf R14: 00007f46246d2300 R15: 0000000000022000 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc_node mm/slab.c:3304 [inline] kmem_cache_alloc_node+0x245/0x3b0 mm/slab.c:3647 Modules linked in: __alloc_skb+0x71/0x560 net/core/skbuff.c:193 ---[ end trace 9b2c28d446816adc ]--- alloc_skb include/linux/skbuff.h:995 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1192 [inline] netlink_sendmsg+0x9ee/0xc40 net/netlink/af_netlink.c:1886 RIP: 0010:trace_event_get_offsets_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:perf_trace_lock_acquire+0x9d/0x530 include/trace/events/lock.h:13 Code: 04 f1 f1 04 f2 c7 40 08 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 40 ff ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 4f 03 00 00 49 8b 7d 18 48 c7 c0 80 14 6a 88 48 RSP: 0018:ffff888049d3fab0 EFLAGS: 00010006 RAX: 0000000000000006 RBX: ffff88809ff54fa8 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000018 RDI: ffffffff89f6d460 RBP: ffff888049d3fb98 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff89f6d460 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 R13: 0000000000000018 R14: 0000000000000000 R15: ffff888049d3fb70 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2227 FS: 00007f46246d2700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009758d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 04 f1 add $0xf1,%al 2: f1 icebp 3: 04 f2 add $0xf2,%al 5: c7 40 08 00 f3 f3 f3 movl $0xf3f3f300,0x8(%rax) c: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax 13: 00 00 15: 48 89 45 d0 mov %rax,-0x30(%rbp) 19: 31 c0 xor %eax,%eax 1b: 48 8d 46 18 lea 0x18(%rsi),%rax 1f: 48 89 85 40 ff ff ff mov %rax,-0xc0(%rbp) 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 0f 85 4f 03 00 00 jne 0x383 34: 49 8b 7d 18 mov 0x18(%r13),%rdi 38: 48 c7 c0 80 14 6a 88 mov $0xffffffff886a1480,%rax 3f: 48 rex.W