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KMSAN: uninit-value in __schedule (5)

Status: auto-obsoleted due to no activity on 2026/05/28 17:49
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+28bdcfc1dab2ffa279a5@syzkaller.appspotmail.com
First crash: 801d, last: 102d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
0cdcae96-934c-49db-8669-ec99660081e0 assessment-security 💥 KMSAN: uninit-value in __schedule (5) 2026/05/15 10:43 2026/05/15 10:43 2026/05/15 10:43 9cd3beaadf14b3a22d15fd97a0bf081ee41ebe01 failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 1 fatal: write error: No space left on device fatal: fetch-pack: invalid index-pack output
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[syzbot] [kernel?] KMSAN: uninit-value in __schedule (5) 1 (4) 2026/02/10 19:05
[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
▶ ▼ Similar bugs (12)
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 1018d 1014d 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 1216d 1219d 0/29 auto-obsoleted due to no activity on 2023/05/17 02:32
upstream KMSAN: uninit-value in __schedule (2) kernel 7 1 1389d 1389d 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 1932d 1932d 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 21 syz 4 350d 356d 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 1609d 1609d 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 1937d 2093d 0/2 auto-obsoleted due to no activity on 2023/04/17 21:57
upstream WARNING: locking bug in __schedule mm 4 1943 448d 737d 0/29 auto-obsoleted due to no activity on 2025/06/02 23:27
upstream general protection fault in __schedule (3) kernel prio:low 2 1111 15m 3d15h 6/29 upstream: reported on 2026/06/12 18:10
upstream BUG: unable to handle kernel paging request in __schedule kernel 8 2 3115d 3110d 3/29 fixed on 2018/01/03 02:35
upstream general protection fault in __schedule (2) kernel 2 C done done 1712 2822d 2866d 0/29 closed as dup on 2019/11/22 20:54
upstream general protection fault in __schedule mm 2 C 722 3098d 3099d 0/29 closed as dup on 2017/12/21 00:34
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/05/28 15:51 28m retest repro upstream OK log
2026/05/28 15:51 29m retest repro upstream OK log
2026/05/28 15:51 31m retest repro upstream OK log
2026/05/28 15:51 27m retest repro upstream OK log
2026/05/28 14:20 26m retest repro upstream OK log
2026/03/19 14:04 12m retest repro upstream error
2026/03/19 14:04 11m retest repro upstream error
2026/03/19 14:04 12m retest repro upstream error
2026/03/19 14:04 12m retest repro upstream error
2026/03/19 14:04 12m retest repro upstream error

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 (595):
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
2026/02/09 14:48 upstream 05f7e89ab973 df949cd9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2026/01/23 09:06 upstream c072629f05d7 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2026/01/19 10:08 upstream 24d479d26b25 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2026/01/17 17:17 upstream d3eeb99bbc99 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2026/01/16 01:39 upstream 603c05a1639f d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2026/01/04 02:49 upstream aacb0a6d604a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in __schedule
2026/02/13 03:19 upstream 37a93dd5c49b 504cb1bf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/12 03:42 upstream 1e83ccd5921a 76a109e2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/12 02:48 upstream 1e83ccd5921a 76a109e2 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/11 18:52 upstream 192c0159402e 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/11 17:32 upstream 192c0159402e 75707236 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/10 21:32 upstream 72c395024dac a076df6f .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/10 12:44 upstream 72c395024dac a076df6f .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto general protection fault in __schedule
2026/02/10 09:36 upstream 8a5203c630c6 4ab09a02 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/09 21:19 upstream 05f7e89ab973 df949cd9 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/09 18:34 upstream 05f7e89ab973 df949cd9 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read in __schedule
2026/02/09 17:47 upstream 05f7e89ab973 df949cd9 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto KASAN: slab-use-after-free Read 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
2026/02/26 02:57 upstream d9d32e5bd5a4 e0f78d93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-out-of-bounds Write in __schedule
2026/02/25 10:25 upstream 7dff99b35460 c162cde9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: use-after-free Write in __schedule
2026/02/14 07:37 upstream 770aaedb461a 1e62d198 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: slab-use-after-free Write in __schedule
2026/03/05 13:21 upstream c107785c7e8d d20b04c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: use-after-free Write in __schedule
2026/02/27 08:51 upstream 3f4a08e64442 a2f13f71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Write in __schedule
2026/02/23 19:09 upstream 6de23f81a5e0 7c9658af .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-out-of-bounds Write in __schedule
2026/02/20 03:36 upstream 8bf22c33e7a1 17d780d6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 BUG: unable to handle kernel paging request in __schedule
2026/02/19 20:20 upstream 2b7a25df823d 73a252ac .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: use-after-free Write in __schedule
2026/02/10 09:42 upstream 8a5203c630c6 4ab09a02 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-use-after-free Write in __schedule
2026/02/10 09:37 upstream 8a5203c630c6 4ab09a02 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: slab-out-of-bounds Write in __schedule
2026/02/09 18:40 upstream 05f7e89ab973 df949cd9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: use-after-free Write 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
* Struck through repros no longer work on HEAD.