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BUG: unable to handle kernel paging request in kfree (2)

Status: fixed on 2018/09/24 08:37
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+ad37a4e3a54f2dbc5546@syzkaller.appspotmail.com
Fix commit: 7913690dcc5e net/9p/client.c: version pointer uninitialized
First crash: 2117d, last: 2065d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
BUG: unable to handle kernel paging request in kfree (2) 0 (1) 2018/07/09 05:55
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: unable to handle kernel paging request in kfree selinux 1 2338d 2334d 0/26 closed as invalid on 2017/12/06 12:41
android-54 BUG: unable to handle kernel paging request in kfree C 4 1521d 1524d 0/2 closed as invalid on 2021/10/11 16:07

Sample crash report:
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
BUG: unable to handle kernel paging request at ffffebe000000008
PGD 0 P4D 0 
Oops: 0000 [#1] SMP KASAN
CPU: 1 PID: 4392 Comm: syz-executor695 Not tainted 4.18.0-rc6+ #165
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:virt_to_head_page include/linux/mm.h:654 [inline]
RIP: 0010:virt_to_cache mm/slab.c:399 [inline]
RIP: 0010:kfree+0xa0/0x260 mm/slab.c:3809
Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48

Crashes (297):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/07/28 04:44 upstream 864af0d40cdc ebf656d7 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/15 08:22 upstream c31496dbacc2 92a49505 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/15 02:14 upstream c31496dbacc2 92a49505 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/15 01:48 upstream c31496dbacc2 92a49505 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/14 11:42 upstream 2db39a2f491a 92a49505 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/13 14:04 upstream 63f047771621 92a49505 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/12 07:52 upstream c25c74b7476e 2e0e3130 .config console log report syz C ci-upstream-kasan-gce
2018/07/12 07:20 upstream c25c74b7476e 2e0e3130 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/11 20:10 upstream 1e09177acae3 2e0e3130 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/11 18:39 upstream 1e09177acae3 2e0e3130 .config console log report syz C ci-upstream-kasan-gce
2018/07/11 11:14 upstream 1e09177acae3 2e0e3130 .config console log report syz C ci-upstream-kasan-gce
2018/07/11 03:46 upstream 30c2c32d7f70 2e0e3130 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/10 17:48 upstream 092150a25cb7 9fa03fa5 .config console log report syz C ci-upstream-kasan-gce
2018/07/10 07:00 upstream 092150a25cb7 f25e5770 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/10 06:34 upstream 092150a25cb7 f25e5770 .config console log report syz C ci-upstream-kasan-gce
2018/07/10 03:52 upstream 092150a25cb7 f25e5770 .config console log report syz C ci-upstream-kasan-gce
2018/07/09 23:47 upstream 1e4b044d2251 f25e5770 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/09 16:22 upstream 1e4b044d2251 f25e5770 .config console log report syz C ci-upstream-kasan-gce
2018/07/09 05:01 upstream ca04b3cca11a f25e5770 .config console log report syz C ci-upstream-kasan-gce-root
2018/07/11 16:22 upstream 1e09177acae3 2e0e3130 .config console log report syz ci-upstream-kasan-gce-386
2018/07/10 15:47 upstream 092150a25cb7 9fa03fa5 .config console log report syz ci-upstream-kasan-gce-386
2018/07/09 18:41 upstream 1e4b044d2251 f25e5770 .config console log report syz ci-upstream-kasan-gce-386
2018/07/09 14:04 upstream 1e4b044d2251 f25e5770 .config console log report syz ci-upstream-kasan-gce-386
2018/07/09 08:20 upstream ca04b3cca11a f25e5770 .config console log report syz ci-upstream-kasan-gce-386
2018/08/17 18:59 upstream 5c60a7389d79 738da825 .config console log report ci-upstream-kasan-gce-root
2018/08/17 13:15 upstream 5c60a7389d79 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/17 10:59 upstream 5c60a7389d79 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/17 08:40 upstream 5c60a7389d79 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/17 06:30 upstream 5c60a7389d79 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/17 01:44 upstream f91e654474d4 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/16 19:54 upstream f91e654474d4 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/16 13:43 upstream dafa5f6577a9 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/16 10:44 upstream dafa5f6577a9 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/16 08:15 upstream dafa5f6577a9 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/16 04:46 upstream dafa5f6577a9 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/15 22:09 upstream 31130a16d459 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/15 20:27 upstream 31130a16d459 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/15 17:13 upstream 31130a16d459 9ccc1d45 .config console log report ci-upstream-kasan-gce-root
2018/08/15 08:54 upstream d0055f351e64 0e6dcb88 .config console log report ci-upstream-kasan-gce-root
2018/08/15 05:26 upstream d0055f351e64 0e6dcb88 .config console log report ci-upstream-kasan-gce-root
2018/08/15 00:57 upstream d0055f351e64 0e6dcb88 .config console log report ci-upstream-kasan-gce-root
2018/08/14 20:07 upstream 10f3e23f07cb 5084a625 .config console log report ci-upstream-kasan-gce-root
2018/08/14 11:37 upstream 7796916146b8 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/14 08:18 upstream 7796916146b8 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/14 06:21 upstream 7796916146b8 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/14 03:43 upstream 7796916146b8 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/13 18:38 upstream 94710cac0ef4 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/13 16:44 upstream 94710cac0ef4 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/13 07:55 upstream d6dd6431591b 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/13 06:32 upstream d6dd6431591b 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/13 03:29 upstream d6dd6431591b 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/13 00:47 upstream d6dd6431591b 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 22:57 upstream d6dd6431591b 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 21:09 upstream d6dd6431591b 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 16:35 upstream ec0c96714e7d 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 14:09 upstream ec0c96714e7d 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 07:24 upstream ec0c96714e7d 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 06:08 upstream ec0c96714e7d 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/12 00:12 upstream ec0c96714e7d 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/11 22:12 upstream ec0c96714e7d 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/11 18:45 upstream f313b43be461 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/11 16:59 upstream f313b43be461 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/11 14:02 upstream f313b43be461 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/08/11 13:22 upstream f313b43be461 7a88b141 .config console log report ci-upstream-kasan-gce-root
2018/07/12 09:14 upstream c25c74b7476e 2e0e3130 .config console log report ci-upstream-kasan-gce
2018/07/08 21:32 upstream b2d44d145d2a f25e5770 .config console log report ci-upstream-kasan-gce-root
2018/07/11 21:36 upstream 1e09177acae3 2e0e3130 .config console log report ci-upstream-kasan-gce-386
2018/08/30 01:49 https://github.com/google/kmsan.git master 2dca2cbde67a 6c7e9d3d .config console log report ci-upstream-kmsan-gce
2018/08/19 08:40 https://github.com/google/kmsan.git master 0cc51dc9a291 2dc4378f .config console log report ci-upstream-kmsan-gce
2018/08/17 14:44 https://github.com/google/kmsan.git master 0cc51dc9a291 738da825 .config console log report ci-upstream-kmsan-gce
2018/08/15 10:58 https://github.com/google/kmsan.git master 0cc51dc9a291 9ccc1d45 .config console log report ci-upstream-kmsan-gce
* Struck through repros no longer work on HEAD.