====================================== | | [ 79.052649][ C3] ------------[ cut here ]------------ | [ 79.053013][ C3] kernel BUG at net/core/skbuff.c:2813! | [ 79.053229][ C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 79.053853][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 79.054392][ C3] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 79.054706][ C3] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 9e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9 All code ======== 0: e9 52 f7 ff ff jmp 0xfffffffffffff757 5: 48 8b 7c 24 38 mov 0x38(%rsp),%rdi a: be 02 00 00 00 mov $0x2,%esi f: e8 9e 9c ff ff call 0xffffffffffff9cb2 14: 48 83 c4 58 add $0x58,%rsp 18: 31 c0 xor %eax,%eax 1a: 5b pop %rbx 1b: 41 5c pop %r12 1d: 41 5d pop %r13 1f: 41 5e pop %r14 21: 41 5f pop %r15 23: 5d pop %rbp 24: c3 ret 25: cc int3 26: cc int3 27: cc int3 28: cc int3 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 c7 44 24 38 00 00 movq $0x0,0x38(%rsp) 33: 00 00 35: e9 dc fa ff ff jmp 0xfffffffffffffb16 3a: 84 c9 test %cl,%cl 3c: 0f .byte 0xf 3d: 84 4b f9 test %cl,-0x7(%rbx) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 c7 44 24 38 00 00 movq $0x0,0x38(%rsp) 9: 00 00 b: e9 dc fa ff ff jmp 0xfffffffffffffaec 10: 84 c9 test %cl,%cl 12: 0f .byte 0xf 13: 84 4b f9 test %cl,-0x7(%rbx) [ 79.055574][ C3] RSP: 0018:ffffc90000278b68 EFLAGS: 00010282 [ 79.055880][ C3] RAX: 00000000fffffff2 RBX: ffff8880056b7eac RCX: 0000000000000004 [ 79.056245][ C3] RDX: dffffc0000000000 RSI: 1ffff110004b9c39 RDI: ffff8880025ce1c8 [ 79.056612][ C3] RBP: ffffc90000278be8 R08: 0000000000000014 R09: ffff8880056b7ef4 [ 79.056983][ C3] R10: ffff8880056b7ef8 R11: ffff8880056b7ef8 R12: ffff8880056b7e40 [ 79.057365][ C3] R13: 0000000000000100 R14: 0000000000000000 R15: ffff8880056b7eea [ 79.057729][ C3] FS: 00007f4fb5885b80(0000) GS:ffff88802fb80000(0000) knlGS:0000000000000000 [ 79.058150][ C3] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.058458][ C3] CR2: 000000000081f008 CR3: 0000000006174003 CR4: 0000000000770ef0 [ 79.058819][ C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 79.059193][ C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 79.059583][ C3] PKRU: 55555554 [ 79.059765][ C3] Call Trace: [ 79.059942][ C3] [ 79.060065][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 79.060252][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 79.060440][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 79.060682][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 79.060931][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 79.061169][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 79.061411][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 79.061654][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 79.061889][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 79.062133][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 79.062476][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 79.062712][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813) [ 79.062948][ C3] ? __netif_receive_skb_core.constprop.0 (net/core/dev.c:5498) [ 79.063226][ C3] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) [ 79.063479][ C3] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:2943 ./include/linux/ip.h:21 net/ipv4/ip_input.c:344) [ 79.063806][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 79.063995][ C3] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:422 net/ipv4/ip_input.c:569) [ 79.064119][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 79.064306][ C3] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 79.064606][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 79.064892][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 79.065093][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 79.065339][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 79.065579][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 79.065824][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 79.066068][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 79.066313][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 79.066559][ C3] ? hlock_class (kernel/locking/lockdep.c:223) [ 79.066805][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 79.067048][ C3] __do_softirq (kernel/softirq.c:553) [ 79.067292][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 79.067537][ C3] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 79.067720][ C3] [ 79.067844][ C3] [ 79.067965][ C3] __local_bh_enable_ip (kernel/softirq.c:381) [ 79.068211][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 79.068452][ C3] __dev_queue_xmit (net/core/dev.c:4400) [ 79.068698][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 79.068996][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) [ 79.069237][ C3] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) [ 79.069481][ C3] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 79.069725][ C3] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) [ 79.069968][ C3] ? __ip_finish_output (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307) [ 79.070215][ C3] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) [ 79.070457][ C3] ? tcp_options_write (net/ipv4/tcp_output.c:670) [ 79.070711][ C3] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) [ 79.070960][ C3] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) [ 79.071206][ C3] ? tcp_mtu_probe (./include/net/net_namespace.h:383 ./include/net/sock.h:648 net/ipv4/tcp_output.c:2420) [ 79.071449][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 79.071697][ C3] ? tcp_small_queue_check.isra.0 (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/linux/refcount.h:136 net/ipv4/tcp_output.c:2623) [ 79.071999][ C3] tcp_write_xmit (net/ipv4/tcp_output.c:2792) [ 79.072244][ C3] ? __pfx_tcp_current_mss (net/ipv4/tcp_output.c:1853) [ 79.072495][ C3] ? __alloc_skb (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 ./include/linux/refcount.h:125 net/core/skbuff.c:696) [ 79.072746][ C3] ? __pfx_tcp_write_xmit (net/ipv4/tcp_output.c:2702) [ 79.072990][ C3] ? tcp_inq_hint (net/ipv4/tcp.c:2299) [ 79.073223][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:4360) [ 79.073490][ C3] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) [ 79.073655][ C3] __tcp_close (net/ipv4/tcp.c:2842) [ 79.073817][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 79.074019][ C3] tcp_close (net/ipv4/tcp.c:2932) [ 79.074151][ C3] inet_release (net/ipv4/af_inet.c:436) [ 79.074324][ C3] __sock_release (net/socket.c:659) [ 79.074554][ C3] sock_close (net/socket.c:1423) [ 79.074725][ C3] __fput (fs/file_table.c:376) [ 79.074868][ C3] __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539) [ 79.075099][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 79.075345][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 79.075637][ C3] RIP: 0033:0x7f4fb59c602b [ 79.075883][ C3] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 cb f5 ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 cc f5 ff 8b 44 All code ======== 0: 03 00 add (%rax),%eax 2: 00 00 add %al,(%rax) 4: 0f 05 syscall 6: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax c: 77 41 ja 0x4f e: c3 ret f: 48 83 ec 18 sub $0x18,%rsp 13: 89 7c 24 0c mov %edi,0xc(%rsp) 17: e8 c3 cb f5 ff call 0xfffffffffff5cbdf 1c: 8b 7c 24 0c mov 0xc(%rsp),%edi 20: 41 89 c0 mov %eax,%r8d 23: b8 03 00 00 00 mov $0x3,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 35 ja 0x67 32: 44 89 c7 mov %r8d,%edi 35: 89 44 24 0c mov %eax,0xc(%rsp) 39: e8 21 cc f5 ff call 0xfffffffffff5cc5f 3e: 8b .byte 0x8b 3f: 44 rex.R Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 35 ja 0x3d 8: 44 89 c7 mov %r8d,%edi b: 89 44 24 0c mov %eax,0xc(%rsp) f: e8 21 cc f5 ff call 0xfffffffffff5cc35 14: 8b .byte 0x8b 15: 44 rex.R [ 79.076746][ C3] RSP: 002b:00007fffbe0b7c50 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 79.077114][ C3] RAX: ffffffffffffffda RBX: 0000000000000057 RCX: 00007f4fb59c602b [ 79.077477][ C3] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000000b [ 79.077847][ C3] RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000000 [ 79.078205][ C3] R10: 00007fffbe0b7b18 R11: 0000000000000293 R12: 0000000000000008 Finger prints: __pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core