syzbot


KMSAN: uninit-value in __schedule (5)

Status: upstream: reported on 2024/04/10 09:12
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+28bdcfc1dab2ffa279a5@syzkaller.appspotmail.com
First crash: 603d, last: 22d
Discussions (4)
Title Replies (including bot) Last reply
[syzbot] Monthly netfilter report (Sep 2025) 0 (1) 2025/09/20 18:33
[syzbot] Monthly netfilter report (Aug 2025) 0 (1) 2025/08/20 08:11
[syzbot] Monthly netfilter report (Jan 2025) 0 (1) 2025/01/13 12:40
[syzbot] [kernel?] KMSAN: uninit-value in __schedule (5) 0 (1) 2024/04/10 09:12
Similar bugs (9)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in __schedule (4) sctp 17 C error 4 820d 816d 0/29 auto-obsoleted due to no activity on 2023/12/10 17:35
upstream KMSAN: uninit-value in __schedule (3) trace net 7 2 1018d 1021d 0/29 auto-obsoleted due to no activity on 2023/05/17 02:32
upstream KMSAN: uninit-value in __schedule (2) kernel 7 1 1191d 1191d 0/29 auto-obsoleted due to no activity on 2022/11/24 18:35
linux-4.19 KASAN: use-after-free Read in __schedule 19 1 1735d 1735d 0/1 auto-closed as invalid on 2021/06/29 13:25
linux-6.1 KASAN: slab-out-of-bounds Write in __schedule origin:upstream 23 syz 4 152d 159d 0/3 auto-obsoleted due to no activity on 2025/10/09 02:03
linux-4.19 KASAN: use-after-free Read in __schedule (2) 19 1 1411d 1411d 0/1 auto-closed as invalid on 2022/05/18 22:28
android-54 BUG: unable to handle kernel paging request in __schedule 8 C 12 1739d 1895d 0/2 auto-obsoleted due to no activity on 2023/04/17 21:57
upstream WARNING: locking bug in __schedule mm 4 1943 250d 540d 0/29 auto-obsoleted due to no activity on 2025/06/02 23:27
upstream BUG: unable to handle kernel paging request in __schedule kernel 8 2 2918d 2913d 3/29 fixed on 2018/01/03 02:35

Sample crash report:
Dead loop on virtual device ipvlan1, fix it urgently!
Dead loop on virtual device ipvlan1, fix it urgently!
Dead loop on virtual device ipvlan1, fix it urgently!
Dead loop on virtual device ipvlan1, fix it urgently!
Dead loop on virtual device ipvlan1, fix it urgently!
Dead loop on virtual device ipvlan1, fix it urgently!
=====================================================
BUG: KMSAN: uninit-value in schedule_debug kernel/sched/core.c:5885 [inline]
BUG: KMSAN: uninit-value in __schedule+0x828/0x7790 kernel/sched/core.c:6806
 schedule_debug kernel/sched/core.c:5885 [inline]
 __schedule+0x828/0x7790 kernel/sched/core.c:6806
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x17d/0x3c0 kernel/sched/core.c:7026
 exit_to_user_mode_loop+0x6c/0x370 kernel/entry/common.c:31
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x1e3/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable acpar created at:
 ip6t_do_table+0x70/0x2280 net/ipv6/netfilter/ip6_tables.c:261
 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
 nf_hook_slow+0xe1/0x3d0 net/netfilter/core.c:623

CPU: 0 UID: 0 PID: 7577 Comm: syz.2.12303 Tainted: G        W           syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
=====================================================

Crashes (561):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/26 09:32 upstream 72761a7e3122 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/10/24 02:32 upstream 266ee584e55e c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/10/08 15:31 upstream 0d97f2067c16 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/09/30 17:13 upstream 30d4efb2f5a5 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/09/27 02:46 upstream fec734e8d564 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/09/21 05:55 upstream 3b08f56fbbb9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/09/15 17:58 upstream f83ec76bf285 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/08/30 08:41 upstream fb679c832b64 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/08/06 13:57 upstream a530a36bb548 4bd24a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/08/04 02:13 upstream 352af6a011d5 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/07/29 05:24 upstream ced1b9e0392d c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/07/26 10:10 upstream 5f33ebd2018c fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/06/24 12:05 upstream 78f4e737a53e e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/06/19 06:40 upstream fb4d33ab452e ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/04/26 12:25 upstream 02ddfb981de8 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2024/04/06 09:02 upstream e8b0ccb2a787 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in __schedule
2025/01/08 03:41 upstream 09a0fa92e5b4 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2025/11/08 14:18 upstream e811c33b1f13 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto BUG: unable to handle kernel NULL pointer dereference in __schedule
2025/07/31 14:13 upstream 260f6f4fda93 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: unable to handle kernel paging request in __schedule
2025/03/24 20:56 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/24 12:20 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/24 07:01 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/23 17:29 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/23 12:11 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/23 05:39 upstream 183601b78a9b c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/23 01:33 upstream 183601b78a9b c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/22 06:35 upstream 88d324e69ea9 c6512ef7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/22 00:53 upstream 88d324e69ea9 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/21 21:10 upstream b3ee1e460951 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/21 02:19 upstream 5fc319360819 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/20 17:00 upstream a7f2e10ecd8f 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/20 08:09 upstream a7f2e10ecd8f 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/19 11:47 upstream 81e4f8d68c66 8d0a2921 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/19 05:03 upstream 81e4f8d68c66 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/19 03:52 upstream 81e4f8d68c66 22a6c2b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/08 02:35 upstream 00a7d39898c8 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/08 00:02 upstream 00a7d39898c8 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/07 23:19 upstream 00a7d39898c8 7e3bd60d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/07 03:39 upstream f315296c92fd 831e3629 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/06 02:36 upstream bb2281fb05e5 034534df .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/05 23:02 upstream bb2281fb05e5 034534df .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/05 15:12 upstream 48a5eed9ad58 60f5d8d9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/05 11:34 upstream 48a5eed9ad58 60f5d8d9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/05 02:01 upstream 48a5eed9ad58 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/04 06:59 upstream 99fa936e8e4f c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/04 04:01 upstream 99fa936e8e4f c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/04 02:29 upstream 99fa936e8e4f c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2025/03/03 14:05 upstream 7eb172143d55 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: wild-memory-access Read in __schedule
2025/03/03 12:20 upstream 7eb172143d55 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in __schedule
2024/08/28 04:39 linux-next 6f923748057a 6c853ff9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in __schedule
2024/08/23 12:13 linux-next c79c85875f1a ce8a9099 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in __schedule
* Struck through repros no longer work on HEAD.