syzbot


general protection fault in x25_write_internal

Status: fixed on 2019/03/28 12:00
Subsystems: x25
[Documentation on labels]
Fix commit: ee74d0bd4325 net/x25: reset state in x25_connect()
First crash: 1901d, last: 1901d

Sample crash report:
kasan: CONFIG_KASAN_INLINE enabled
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 18778 Comm: syz-executor.1 Not tainted 5.0.0+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:x25_write_internal+0x1e8/0xdf0 net/x25/x25_subr.c:173
Code: 00 40 88 b5 e0 fe ff ff 0f 85 01 0b 00 00 48 8b 8b 80 04 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 79 1c 48 89 fe 48 c1 ee 03 <0f> b6 34 16 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f
RSP: 0000:ffff888057c7fa08 EFLAGS: 00010207
RAX: ffff8880a8a9cd12 RBX: ffff888085622b40 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 000000000000001c
RBP: ffff888057c7fb40 R08: ffff8880a0678400 R09: ffffed10151539bd
R10: ffffed10151539bc R11: ffff8880a8a9cde3 R12: ffff88809ada8200
R13: 1ffff1100af8ff47 R14: 0000000000000013 R15: 0000000000000013
FS:  00007fd80d01e700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020305000 CR3: 00000000a40d6000 CR4: 00000000001406e0
Call Trace:
 x25_release+0xd0/0x340 net/x25/af_x25.c:658
 __sock_release+0xd3/0x2b0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1162
 __fput+0x2df/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 get_signal+0x1961/0x1d50 kernel/signal.c:2388
 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457f29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd80d01dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 0000000000457f29
RDX: 0000000000000012 RSI: 0000000020000000 RDI: 0000000000000009
RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd80d01e6d4
R13: 00000000004be462 R14: 00000000004cec98 R15: 00000000ffffffff
Modules linked in:
general protection fault: 0000 [#2] PREEMPT SMP KASAN
CPU: 0 PID: 18770 Comm: syz-executor.1 Tainted: G      D           5.0.0+ #118
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:x25_write_internal+0x1e8/0xdf0 net/x25/x25_subr.c:173
Code: 00 40 88 b5 e0 fe ff ff 0f 85 01 0b 00 00 48 8b 8b 80 04 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 79 1c 48 89 fe 48 c1 ee 03 <0f> b6 34 16 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f
RSP: 0018:ffff8880639f7a08 EFLAGS: 00010207
RAX: ffff8880a93ef312 RBX: ffff8880a081e8c0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 000000000000001c
RBP: ffff8880639f7b40 R08: ffff88809b04a3c0 R09: ffffed101527de7d
R10: ffffed101527de7c R11: ffff8880a93ef3e3 R12: ffff88808955c080
R13: 1ffff1100c73ef47 R14: 0000000000000013 R15: 0000000000000013
FS:  00007fd80d060700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b2da35000 CR3: 00000000a40d6000 CR4: 00000000001406f0
Call Trace:
 x25_release+0xd0/0x340 net/x25/af_x25.c:658
 __sock_release+0xd3/0x2b0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1162
 __fput+0x2df/0x8d0 fs/file_table.c:278
---[ end trace 4cd5e87eecd9d2c2 ]---
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 get_signal+0x1961/0x1d50 kernel/signal.c:2388
RIP: 0010:x25_write_internal+0x1e8/0xdf0 net/x25/x25_subr.c:173
 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816
Code: 00 40 88 b5 e0 fe ff ff 0f 85 01 0b 00 00 48 8b 8b 80 04 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 79 1c 48 89 fe 48 c1 ee 03 <0f> b6 34 16 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f
RSP: 0000:ffff888057c7fa08 EFLAGS: 00010207
RAX: ffff8880a8a9cd12 RBX: ffff888085622b40 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: 000000000000001c
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
RBP: ffff888057c7fb40 R08: ffff8880a0678400 R09: ffffed10151539bd
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457f29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd80d05fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
R10: ffffed10151539bc R11: ffff8880a8a9cde3 R12: ffff88809ada8200
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 0000000000457f29
RDX: 0000000000000012 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd80d0606d4
R13: 00000000004be462 R14: 00000000004cec98 R15: 00000000ffffffff
Modules linked in:
R13: 1ffff1100af8ff47 R14: 0000000000000013 R15: 0000000000000013
---[ end trace 4cd5e87eecd9d2c3 ]---
FS:  00007fd80d01e700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
RIP: 0010:x25_write_internal+0x1e8/0xdf0 net/x25/x25_subr.c:173
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Code: 00 40 88 b5 e0 fe ff ff 0f 85 01 0b 00 00 48 8b 8b 80 04 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d 79 1c 48 89 fe 48 c1 ee 03 <0f> b6 34 16 48 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f
CR2: 0000000021000000 CR3: 00000000a40d6000 CR4: 00000000001406e0
RSP: 0000:ffff888057c7fa08 EFLAGS: 00010207

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/03/11 21:18 net-old 41af8b3a097c 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 19:07 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 18:17 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 18:11 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 17:44 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 16:02 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 14:01 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
2019/03/11 13:24 net-old 2a5ff07a0eb9 12365b99 .config console log report ci-upstream-net-this-kasan-gce
* Struck through repros no longer work on HEAD.