KCSAN: data-race in _prb_read_valid / prb_reserve

Status: moderation: reported C repro on 2020/11/09 13:24
Subsystems: net
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+615128043c250cbd858b@syzkaller.appspotmail.com
First crash: 2203d, last: 14h33m
▶ ▼ ✨ AI Jobs (6)
ID Workflow Result Correct Bug Created Started Finished Revision
432c5660 repro-c Reproduced: ✅ ❓ KCSAN: data-race in _prb_read_valid / prb_reserve 2026/09/27 23:13 2026/09/27 23:13 2026/09/28 00:48 a3c7249d
82dc4ab3 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ✅ NetworkTrigger: ✅ PeripheralTrigger: ✅ RemoteTrigger: ✅ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ✅ VMHostTrigger: ✅ ❓ KCSAN: data-race in _prb_read_valid / prb_reserve 2026/05/31 10:06 2026/05/31 10:06 2026/05/31 10:45 6b4a8443
c63b94d5 assessment-security 💥 KCSAN: data-race in _prb_read_valid / prb_reserve 2026/05/14 16:18 2026/05/14 16:18 2026/05/14 16:19 6ccb967e
94f52fd1 repro ❓ KCSAN: data-race in _prb_read_valid / prb_reserve 2026/03/06 23:33 2026/03/06 23:33 2026/03/06 23:37 31e9c887
1dfc13c0 assessment-kcsan Benign: ✅ Confident: ✅ ❓ KCSAN: data-race in _prb_read_valid / prb_reserve 2026/02/24 17:55 2026/02/24 17:55 2026/02/24 17:57 305c0ec5
f7e2f1fe assessment-kcsan 💥 KCSAN: data-race in _prb_read_valid / prb_reserve 2026/01/09 21:31 2026/01/09 21:31 2026/01/09 21:31 75199160
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/09/28 01:20 9m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git efb44d93a620c294c049db37c810c8ab7ee1122d no crash job log log

Sample crash report:
BUG: KCSAN: data-race in _prb_read_valid / prb_reserve

Crashes (3983):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/08 09:43 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7b63ef2d55f2 6520ecdb .config console log report C ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/26 15:13 upstream 6b4b543fa187 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/24 11:43 upstream 5b0764a53235 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/22 02:29 upstream a804c5742bff 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/20 10:34 upstream f47d223627f8 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/19 22:23 upstream c03c1a14507d 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/19 13:36 upstream c03c1a14507d 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/18 14:06 upstream 32c52ec87d62 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/17 16:47 upstream 58161ead29e5 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/16 11:21 upstream 2f2f7eeef8b0 4c840a2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/14 08:40 upstream ca3e345926b0 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/12 08:27 upstream 24a19b953e2a 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/12 01:23 upstream b88c841d1164 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/10 03:40 upstream fc1c25014ff8 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/09 08:19 upstream af32da41b032 b2734a59 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/08 05:34 upstream 7b63ef2d55f2 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/07 08:27 upstream 602042bf29f6 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/07 01:15 upstream 69f80fef3153 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/04 14:25 upstream 6addb4f38557 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/10/02 05:52 upstream ce1e0223d8ad 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/29 21:30 upstream 6f8319e3e9a4 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/29 04:04 upstream 72d3fcf802c4 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/28 12:24 upstream 72d3fcf802c4 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/25 23:29 upstream aa98230e410f f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/25 08:10 upstream f49a343b305c f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/24 22:12 upstream f49a343b305c 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/24 08:15 upstream 62f4c998b297 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/22 07:40 upstream f0100363d8c3 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/19 01:40 upstream 17e7b8eacf4c 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/18 12:07 upstream 5dd1818b15d9 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/17 10:14 upstream 238650ef6c7c 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/15 22:28 upstream f6e7b42bf05b 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/15 17:20 upstream 587858367581 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/15 09:36 upstream 587858367581 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/14 19:52 upstream 704340f1cd0d 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/12 09:56 upstream 3026c6e4f223 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/08 22:22 upstream 28924df2a08f 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/08 05:17 upstream 28924df2a08f 680aa3e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/05 22:30 upstream 0d9ff90a5422 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/03 06:02 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/09/03 02:40 upstream 940de590b839 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/08/27 04:24 upstream 502d45774af0 a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/08/26 15:32 upstream 73ae59e97596 a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/08/24 13:34 upstream 0a0d1d55dad5 b55bd4c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/08/22 21:48 upstream 66fb95a52111 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/08/22 04:04 upstream 26260251022f 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/05/29 16:57 upstream 8fde5d1d47f6 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/05/09 07:35 upstream 27a26ccfd528 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/03/06 03:51 upstream 5ee8dbf54602 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/02/22 18:40 upstream 32a92f8c8932 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2026/01/08 22:55 upstream 79b95d74470d d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in _prb_read_valid / prb_reserve
2021/01/17 12:41 upstream 0da0a8a0a0e1 813be542 .config console log report info ci2-upstream-kcsan-gce
2020/11/09 09:54 upstream f8394f232b1e cba33199 .config console log report info ci2-upstream-kcsan-gce
2020/11/07 20:52 upstream 659caaf65dc9 cba33199 .config console log report info ci2-upstream-kcsan-gce
2020/10/14 17:14 upstream b5fc7a89e58b fc7735a2 .config console log report info ci2-upstream-kcsan-gce
* Struck through repros no longer work on HEAD.