upstream test error: KMSAN: kernel-infoleak in irqentry_exit (2)

Status: upstream: reported on 2026/07/15 20:30
Subsystems: kernel
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+6c23bcc14437c2fecd4f@syzkaller.appspotmail.com
First crash: 91d, last: 2h55m
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ID Workflow Result Correct Bug Created Started Finished Revision
2a99875a repro-c 💥 upstream test error: KMSAN: kernel-infoleak in irqentry_exit (2) 2026/09/25 05:14 2026/09/25 05:14 2026/09/26 00:57 f281d9d2
7b5673a4 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ upstream test error: KMSAN: kernel-infoleak in irqentry_exit (2) 2026/07/17 00:00 2026/07/17 00:00 2026/07/17 04:03 49f47391
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[syzbot] [kernel?] upstream test error: KMSAN: kernel-infoleak in irqentry_exit (2) 0 (1) 2026/07/15 20:30

Sample crash report:
=====================================================
BUG: KMSAN: kernel-infoleak in rseq_exit_user_update include/linux/rseq_entry.h:627 [inline]
BUG: KMSAN: kernel-infoleak in __rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:675 [inline]
BUG: KMSAN: kernel-infoleak in rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:704 [inline]
BUG: KMSAN: kernel-infoleak in exit_to_user_mode_loop kernel/entry/common.c:103 [inline]
BUG: KMSAN: kernel-infoleak in __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
BUG: KMSAN: kernel-infoleak in irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
BUG: KMSAN: kernel-infoleak in irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
BUG: KMSAN: kernel-infoleak in irqentry_exit+0x35a/0xa80 kernel/entry/common.c:165
 rseq_exit_user_update include/linux/rseq_entry.h:627 [inline]
 __rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:675 [inline]
 rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:704 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:103 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
 irqentry_exit+0x35a/0xa80 kernel/entry/common.c:165
 exc_page_fault+0x7e/0xb0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:595

Local variable st.i.i created at:
 __do_sys_statfs fs/statfs.c:193 [inline]
 __se_sys_statfs fs/statfs.c:191 [inline]
 __x64_sys_statfs+0x73/0x200 fs/statfs.c:191
 x64_sys_call+0x20fb/0x3350 arch/x86/include/generated/asm/syscalls_64.h:138

Bytes 0-3 of 4 are uninitialized
Memory access of size 4 starts at ffff888106edbe8c
Data copied to user address 00007fc3bff6fadc

CPU: 0 UID: 0 PID: 4898 Comm: mount Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
=====================================================

Crashes (595):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/14 04:00 upstream ca3e345926b0 7321cd29 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/12 14:20 upstream 24a19b953e2a 745a967f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/12 04:13 upstream 24a19b953e2a 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/11 23:04 upstream d6d3455d8751 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/11 17:01 upstream b88c841d1164 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/11 03:47 upstream a5ebb76233b7 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/10 01:45 upstream 3857c2fe5449 a8add9cd .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/09 23:32 upstream fc1c25014ff8 a8add9cd .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/09 12:15 upstream af32da41b032 a8add9cd .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/09 06:20 upstream af32da41b032 b2734a59 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/09 01:10 upstream 6c377d19d4a5 b2734a59 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/08 17:20 upstream 6c377d19d4a5 4f6a9fcf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/06 15:13 upstream 69f80fef3153 f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/06 10:30 upstream 22430ae5d90a f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/06 03:26 upstream 67f0943b394d f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/05 18:21 upstream 67f0943b394d 1995e6c7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/05 12:40 upstream a90ee4305c4a 1995e6c7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/04 19:57 upstream 7704c4c5bb12 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/04 05:40 upstream 6addb4f38557 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 20:16 upstream a74306e2e676 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 18:28 upstream 25d576ed1110 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 16:36 upstream 8623551a424d 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 04:51 upstream e767a4ea70a3 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/09/22 01:29 upstream f0100363d8c3 e12281bd .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/16 23:36 upstream 481ed5dd3ed7 8f30cfd7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/15 09:16 upstream 58717b2a1365 209f0369 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/14 21:00 upstream 0fcb05b72344 8fb0ae89 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/14 16:46 upstream 0fcb05b72344 7321cd29 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/14 05:36 upstream 4056b3c9d3c9 7321cd29 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/14 02:22 upstream ca3e345926b0 7321cd29 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/13 12:29 upstream 24a19b953e2a 7321cd29 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/11 22:11 upstream d6d3455d8751 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/11 20:19 upstream d5b6dc381db9 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/11 01:09 upstream a5ebb76233b7 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/10 06:12 upstream 3857c2fe5449 4f92358f .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/10 00:38 upstream fc1c25014ff8 a8add9cd .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/09 03:46 upstream 6c377d19d4a5 b2734a59 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/08 16:30 upstream 6c377d19d4a5 4f6a9fcf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/08 14:10 upstream 47324d3a5b3a 4f6a9fcf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/08 11:59 upstream 0c2669a9f4a1 4f6a9fcf .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/08 05:41 upstream 0c2669a9f4a1 6520ecdb .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/07 16:23 upstream 7b63ef2d55f2 6520ecdb .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/07 14:12 upstream 602042bf29f6 6520ecdb .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/07 02:04 upstream 602042bf29f6 f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/06 16:25 upstream 69f80fef3153 f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/06 06:27 upstream 2c3418fffa9d f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/06 02:40 upstream 67f0943b394d f7710056 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/05 15:35 upstream 67f0943b394d 1995e6c7 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/04 22:23 upstream a90ee4305c4a 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/04 18:50 upstream 7704c4c5bb12 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/04 17:08 upstream 06ac07312919 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 21:20 upstream a74306e2e676 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 05:39 upstream e767a4ea70a3 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/10/03 00:23 upstream ff47652a4b66 57bbd979 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
* Struck through repros no longer work on HEAD.