syzbot


kernel panic: cclose ADDR

Status: fixed on 2019/04/08 14:19
Reported-by: syzbot+9eec51df84779065d6de@syzkaller.appspotmail.com
Fix commit: 0131aeb3c742 Fix refcounting problem in walk_symlink()
First crash: 2321d, last: 2055d

Sample crash report:
kernel panic at kern/src/ns/chan.c:331, from core 0: cclose 0x0000000000000000
Stack Backtrace on Core 0:
#01 [<0xffffffffc200a33c>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009b3d>] in _panic at src/init.c:268
#03 [<0xffffffffc203194a>] in cclose at src/ns/chan.c:331
#04 [<0xffffffffc2033329>] in walk_symlink at src/ns/chan.c:1702
#05 [<0xffffffffc2033314>] in walk_symlink at src/ns/chan.c:1700
#06 [<0xffffffffc2033314>] in walk_symlink at src/ns/chan.c:1700
#07 [<0xffffffffc2033314>] in walk_symlink at src/ns/chan.c:1700
#08 [<0xffffffffc2033314>] in walk_symlink at src/ns/chan.c:1700
#09 [<0xffffffffc2033314>] in walk_symlink at src/ns/chan.c:1700
#10 [<0xffffffffc2033314>] in walk_symlink at src/ns/chan.c:1700
#11 [<0xffffffffc2032e32>] in walk at src/ns/chan.c:871
#12 [<0xffffffffc2033509>] in __namec_from at src/ns/chan.c:1138
#13 [<0xffffffffc20340ef>] in namec at src/ns/chan.c:1516
#14 [<0xffffffffc203ddc5>] in sysremove at src/ns/sysfile.c:839
#15 [<0xffffffffc2055845>] in sys_unlink at src/syscall.c:1926
#16 [<0xffffffffc2059569>] in syscall at src/syscall.c:2455
#17 [<0xffffffffc2059734>] in run_local_syscall at src/syscall.c:2490
#18 [<0xffffffffc2059c69>] in prep_syscalls at src/syscall.c:2510
#19 [<0xffffffffc20ab5fa>] in sysenter_callwrapper at arch/x86/trap.c:854

Crashes (110244):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/09/12 02:28 akaros 09363dc1775f 4ae17b1f .config console log report syz C ci-akaros-main
2018/09/01 05:22 akaros 09363dc1775f 19cfcead .config console log report syz C ci-akaros-main
2018/08/20 13:11 akaros e94ea40da19b 2dc4378f .config console log report syz C ci-akaros-main
2018/08/12 01:03 akaros 8b21413cae5f 7a88b141 .config console log report syz C ci-akaros-main
2018/08/11 20:40 akaros 8b21413cae5f 7a88b141 .config console log report syz C ci-akaros-main
2018/08/11 19:08 akaros 8b21413cae5f 7a88b141 .config console log report syz C ci-akaros-main
2018/07/31 16:04 akaros 6f34e34a70a3 1a381291 .config console log report syz C ci-akaros-main
2018/07/31 12:04 akaros 6f34e34a70a3 1a381291 .config console log report syz C ci-akaros-main
2018/07/30 06:32 akaros 8dc899e19d0f 1a381291 .config console log report syz C ci-akaros-main
2018/07/25 17:20 akaros 8dc899e19d0f 375a3e31 .config console log report syz C ci-akaros-main
2018/07/25 15:07 akaros c5f7000db927 375a3e31 .config console log report syz C ci-akaros-main
2018/07/25 13:40 akaros c5f7000db927 375a3e31 .config console log report syz C ci-akaros-main
2018/07/25 06:55 akaros c5f7000db927 375a3e31 .config console log report syz C ci-akaros-main
2018/07/25 05:13 akaros c5f7000db927 375a3e31 .config console log report syz C ci-akaros-main
2018/07/25 03:57 akaros c5f7000db927 375a3e31 .config console log report syz C ci-akaros-main
2018/07/25 00:23 akaros c5f7000db927 375a3e31 .config console log report syz C ci-akaros-main
2018/07/24 12:46 akaros c5f7000db927 9fe4bdc5 .config console log report syz C ci-akaros-main
2018/07/24 11:11 akaros c5f7000db927 9fe4bdc5 .config console log report syz C ci-akaros-main
2018/07/24 10:23 akaros c5f7000db927 9fe4bdc5 .config console log report syz C ci-akaros-main
2018/07/23 05:55 akaros 9196d29ad275 8cc079c3 .config console log report syz C ci-akaros-main
2018/07/21 20:16 akaros 9196d29ad275 8cc079c3 .config console log report syz C ci-akaros-main
2018/07/19 06:45 akaros bf9a9ba0d6af 49f35839 .config console log report syz C ci-akaros-main
2018/07/19 04:20 akaros bf9a9ba0d6af 49f35839 .config console log report syz C ci-akaros-main
2018/07/18 22:48 akaros bf9a9ba0d6af 49f35839 .config console log report syz C ci-akaros-main
2018/07/18 20:42 akaros bf9a9ba0d6af 49f35839 .config console log report syz C ci-akaros-main
2018/07/17 12:46 akaros 93b9607ebeff 570df9b2 .config console log report syz C ci-akaros-main
2018/07/17 10:14 akaros 93b9607ebeff 570df9b2 .config console log report syz C ci-akaros-main
2018/07/17 09:26 akaros 93b9607ebeff 570df9b2 .config console log report syz C ci-akaros-main
2018/07/16 17:13 akaros 93b9607ebeff 40cb0c9a .config console log report syz C ci-akaros-main
2018/07/16 16:28 akaros 93b9607ebeff 40cb0c9a .config console log report syz C ci-akaros-main
2019/04/08 14:07 akaros 26e4d0b9a3ef 798a29ec .config console log report ci-akaros-main
2019/04/08 13:28 akaros 26e4d0b9a3ef 798a29ec .config console log report ci-akaros-main
2019/04/08 12:37 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 12:32 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 11:16 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 11:11 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 10:10 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 09:35 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 09:14 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 08:13 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 07:22 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 07:16 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 06:05 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 05:57 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 04:49 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 03:55 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 03:30 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 02:18 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 01:20 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 00:36 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/08 00:19 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 23:17 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 22:15 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 21:15 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 20:15 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 19:17 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 18:15 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 18:13 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 17:09 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 16:36 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 16:21 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 15:13 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 14:25 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 13:18 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 13:08 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 12:08 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 11:16 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 10:19 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 10:00 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 08:53 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2019/04/07 07:58 akaros 26e4d0b9a3ef c34fde03 .config console log report ci-akaros-main
2018/07/16 16:13 akaros 93b9607ebeff 40cb0c9a .config console log report ci-akaros-main
* Struck through repros no longer work on HEAD.