bisecting fixing commit since 672481c2deffb371d8a7dfdc009e44c09864a869
building syzkaller on be5c2c81971442d623dd1b265dabf4644ceeb35b
testing commit 672481c2deffb371d8a7dfdc009e44c09864a869 with gcc (GCC) 8.1.0
kernel signature: 8d2fc51eeef614fc2ed3f96835613f2c8d8fb442d337e6a21bf0f7297826fc42
run #0: crashed: general protection fault in xfrmi_decode_session
run #1: crashed: general protection fault in xfrmi_decode_session
run #2: crashed: general protection fault in xfrmi_decode_session
run #3: crashed: general protection fault in xfrmi_decode_session
run #4: crashed: general protection fault in xfrmi_decode_session
run #5: crashed: general protection fault in xfrmi_decode_session
run #6: crashed: general protection fault in xfrmi_decode_session
run #7: crashed: general protection fault in xfrmi_decode_session
run #8: crashed: general protection fault in xfrmi_decode_session
run #9: crashed: BUG: unable to handle kernel paging request in xfrmi_decode_session
testing current HEAD 93556fb211fa7f1e18f869bdce0c225c25594942
testing commit 93556fb211fa7f1e18f869bdce0c225c25594942 with gcc (GCC) 8.1.0
kernel signature: 4daa41a84d063b8976fa984b830e29e2fde3cc987ac195022ff6e66762e01dd3
all runs: crashed: general protection fault in xfrmi_decode_session
revisions tested: 2, total time: 27m6.633069415s (build: 18m42.450900602s, test: 7m5.254471046s)
the crash still happens on HEAD
commit msg: Linux 4.19.111
crash: general protection fault in xfrmi_decode_session
8021q: adding VLAN 0 to HW filter on device batadv0
8021q: adding VLAN 0 to HW filter on device batadv0
IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready
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
kasan: CONFIG_KASAN_INLINE enabled
CPU: 1 PID: 7310 Comm: syz-executor.3 Not tainted 4.19.111-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:xs_net include/net/xfrm.h:253 [inline]
RIP: 0010:xfrmi_decode_session+0x124/0x5b0 net/xfrm/xfrm_interface.c:94
Code: 7c dc 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 45 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c dc 10 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 18 04 00 00 48 8b 1b e8 ba 36 6e fb 31 d2 45 31
RSP: 0018:ffff8880894af0c8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88809b2e6788
RBP: ffff8880894af0f0 R08: ffffed1015d64733 R09: ffffed1015d64732
kasan: GPF could be caused by NULL-ptr deref or user memory access
R10: ffffed1015d64732 R11: ffff8880aeb23993 R12: ffff88809b2e6780
R13: 0000000000000039 R14: 000000000000000b R15: ffff8880a03e6dc0
FS:  00007ff243f49700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000960004 CR3: 00000000965cb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __xfrm_policy_check+0x198/0x23f0 net/xfrm/xfrm_policy.c:2342
 __xfrm_policy_check2 include/net/xfrm.h:1201 [inline]
 xfrm_policy_check include/net/xfrm.h:1206 [inline]
 xfrm4_policy_check include/net/xfrm.h:1211 [inline]
 vti_input+0x3cb/0x620 net/ipv4/ip_vti.c:63
 vti_rcv+0xff/0x130 net/ipv4/ip_vti.c:109
 xfrm4_esp_rcv+0x84/0x160 net/ipv4/xfrm4_protocol.c:100
 ip_local_deliver_finish+0x235/0x9e0 net/ipv4/ip_input.c:215
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_local_deliver+0x2f7/0x440 net/ipv4/ip_input.c:256
 dst_input include/net/dst.h:453 [inline]
 ip_rcv_finish+0x166/0x270 net/ipv4/ip_input.c:414
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524
 __netif_receive_skb_one_core+0xe9/0x170 net/core/dev.c:4947
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5059
 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5149
 napi_frags_finish net/core/dev.c:5676 [inline]
 napi_gro_frags+0x4b3/0x8e0 net/core/dev.c:5749
 tun_get_user+0x25ec/0x47d0 drivers/net/tun.c:1943
 tun_chr_write_iter+0xaf/0x150 drivers/net/tun.c:1989
 call_write_iter include/linux/fs.h:1820 [inline]
 do_iter_readv_writev+0x4ae/0x960 fs/read_write.c:681
 do_iter_write+0x12a/0x510 fs/read_write.c:960
 vfs_writev+0x16f/0x2d0 fs/read_write.c:1005
 do_writev+0x110/0x330 fs/read_write.c:1040
 __do_sys_writev fs/read_write.c:1113 [inline]
 __se_sys_writev fs/read_write.c:1110 [inline]
 __x64_sys_writev+0x70/0xb0 fs/read_write.c:1110
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a7d1
Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b7 fb ff c3 48 83 ec 08 e8 fa 2c 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 43 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ff243f48ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000036 RCX: 000000000045a7d1
RDX: 0000000000000001 RSI: 00007ff243f48c00 RDI: 00000000000000f0
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 00007ff243f499d0 R11: 0000000000000293 R12: 00007ff243f496d4
R13: 00000000004cab2a R14: 00000000004e4078 R15: 00000000ffffffff
Modules linked in:
general protection fault: 0000 [#2] PREEMPT SMP KASAN
---[ end trace 5eb24a60ef401248 ]---
CPU: 0 PID: 7313 Comm: syz-executor.0 Tainted: G      D           4.19.111-syzkaller #0
RIP: 0010:xs_net include/net/xfrm.h:253 [inline]
RIP: 0010:xfrmi_decode_session+0x124/0x5b0 net/xfrm/xfrm_interface.c:94
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:xs_net include/net/xfrm.h:253 [inline]
RIP: 0010:xfrmi_decode_session+0x124/0x5b0 net/xfrm/xfrm_interface.c:94
Code: 7c dc 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 45 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c dc 10 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 18 04 00 00 48 8b 1b e8 ba 36 6e fb 31 d2 45 31
RSP: 0018:ffff88809fde70c8 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0f0e0d0c00000000 RCX: ffffffff85de8886
RDX: 01e1c1a180000000 RSI: 0000000000000002 RDI: ffff88809b2e6f88
RBP: ffff88809fde70f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809b2e6f80
R13: 0000000000000039 R14: 000000000000000b R15: ffff8880a7ade040
FS:  00007fc43cc78700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
Code: 7c dc 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 45 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c dc 10 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 18 04 00 00 48 8b 1b e8 ba 36 6e fb 31 d2 45 31
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000960004 CR3: 000000007a6f4000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __xfrm_policy_check+0x198/0x23f0 net/xfrm/xfrm_policy.c:2342
RSP: 0018:ffff8880894af0c8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
 __xfrm_policy_check2 include/net/xfrm.h:1201 [inline]
 xfrm_policy_check include/net/xfrm.h:1206 [inline]
 xfrm4_policy_check include/net/xfrm.h:1211 [inline]
 vti_input+0x3cb/0x620 net/ipv4/ip_vti.c:63
 vti_rcv+0xff/0x130 net/ipv4/ip_vti.c:109
 xfrm4_esp_rcv+0x84/0x160 net/ipv4/xfrm4_protocol.c:100
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88809b2e6788
 ip_local_deliver_finish+0x235/0x9e0 net/ipv4/ip_input.c:215
RBP: ffff8880894af0f0 R08: ffffed1015d64733 R09: ffffed1015d64732
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_local_deliver+0x2f7/0x440 net/ipv4/ip_input.c:256
R10: ffffed1015d64732 R11: ffff8880aeb23993 R12: ffff88809b2e6780
 dst_input include/net/dst.h:453 [inline]
 ip_rcv_finish+0x166/0x270 net/ipv4/ip_input.c:414
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ip_rcv+0xcb/0x2e0 net/ipv4/ip_input.c:524
R13: 0000000000000039 R14: 000000000000000b R15: ffff8880a03e6dc0
 __netif_receive_skb_one_core+0xe9/0x170 net/core/dev.c:4947
FS:  00007ff243f49700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 __netif_receive_skb+0x1f/0x1b0 net/core/dev.c:5059
CR2: 0000000000960004 CR3: 00000000965cb000 CR4: 00000000001406e0
 netif_receive_skb_internal+0xca/0x300 net/core/dev.c:5149
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 napi_frags_finish net/core/dev.c:5676 [inline]
 napi_gro_frags+0x4b3/0x8e0 net/core/dev.c:5749
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 tun_get_user+0x25ec/0x47d0 drivers/net/tun.c:1943