------------[ cut here ]------------
sk->sk_forward_alloc
WARNING: net/ipv4/af_inet.c:162 at inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162, CPU#3: udevd/5143
Modules linked in:
CPU: 3 UID: 0 PID: 5143 Comm: udevd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:inet_sock_destruct+0x653/0x800 net/ipv4/af_inet.c:162
Code: 32 4d ff e9 06 fd ff ff e8 fa 73 fc f7 90 0f 0b 90 e9 35 fe ff ff e8 ec 73 fc f7 90 0f 0b 90 e9 c5 fe ff ff e8 de 73 fc f7 90 <0f> 0b 90 e9 04 ff ff ff e8 d0 73 fc f7 90 0f 0b 90 e9 65 fe ff ff
RSP: 0018:ffffc900006f8d90 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880235c6600 RCX: ffffffff8a0cd007
RDX: ffff8880305c2540 RSI: ffffffff8a0cd102 RDI: ffff8880305c2540
RBP: 0000000000000f70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000f70 R11: 0000000000000001 R12: ffff8880235c6600
R13: ffff8880235c6690 R14: ffffffff81ee981d R15: 0000000000000000
FS: 00007fd17557a880(0000) GS:ffff8880d665f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0f754da08 CR3: 0000000034d16000 CR4: 0000000000352ef0
Call Trace:
__sk_destruct+0x85/0xab0 net/core/sock.c:2357
rcu_do_batch kernel/rcu/tree.c:2645 [inline]
rcu_core+0x5a2/0x10d0 kernel/rcu/tree.c:2897
handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x162/0x210 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__fget_light fs/file.c:1196 [inline]
RIP: 0010:fdget fs/file.c:1208 [inline]
RIP: 0010:fdget_pos+0x15b/0x380 fs/file.c:1254
Code: 47 75 ff 48 85 db 0f 84 7e 01 00 00 e8 4e 4c 75 ff 48 8d 7b 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e b5 01 00 00 8b 6b 40 31 ff 81 e5 00 40 00
RSP: 0018:ffffc90003b17e00 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffff888025f14700 RCX: ffffffff8293f884
RDX: 1ffff11004be28e8 RSI: ffffffff8293f892 RDI: ffff888025f14740
RBP: 000000000000000e R08: 0000000000000007 R09: 0000000000000000
R10: ffff888025f14700 R11: 0000000000000000 R12: ffffffffffffffff
R13: 0000000000008000 R14: 0000000000000000 R15: 00000000000000d9
class_fd_pos_constructor include/linux/file.h:85 [inline]
__do_sys_getdents64 fs/readdir.c:387 [inline]
__se_sys_getdents64 fs/readdir.c:384 [inline]
__x64_sys_getdents64+0xdf/0x2c0 fs/readdir.c:384
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd174ef0d23
Code: 8b 05 d9 00 10 00 64 c7 00 16 00 00 00 31 c0 eb b0 66 0f 1f 44 00 00 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 a1 00 10 00 f7 d8
RSP: 002b:00007fff50363ec8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000056038f36cb50 RCX: 00007fd174ef0d23
RDX: 0000000000008000 RSI: 000056038f36cb80 RDI: 000000000000000e
RBP: 000056038f36cb54 R08: 0000000000000040 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000293 R12: 000056038f36cb80
R13: fffffffffffffe68 R14: 0000000000000002 R15: 00007fff503641b0
----------------
Code disassembly (best guess):
0: 47 75 ff rex.RXB jne 0x2
3: 48 85 db test %rbx,%rbx
6: 0f 84 7e 01 00 00 je 0x18a
c: e8 4e 4c 75 ff call 0xff754c5f
11: 48 8d 7b 40 lea 0x40(%rbx),%rdi
15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1c: fc ff df
1f: 48 89 fa mov %rdi,%rdx
22: 48 c1 ea 03 shr $0x3,%rdx
26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 74 08 je 0x36
2e: 3c 03 cmp $0x3,%al
30: 0f 8e b5 01 00 00 jle 0x1eb
36: 8b 6b 40 mov 0x40(%rbx),%ebp
39: 31 ff xor %edi,%edi
3b: 81 .byte 0x81
3c: e5 00 in $0x0,%eax
3e: 40 rex