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: 23d, last: 55m
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ID Workflow Result Correct Bug Created Started Finished Revision
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:626 [inline]
BUG: KMSAN: kernel-infoleak in __rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:674 [inline]
BUG: KMSAN: kernel-infoleak in rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:703 [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+0x34f/0xa40 kernel/entry/common.c:165
 rseq_exit_user_update include/linux/rseq_entry.h:626 [inline]
 __rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:674 [inline]
 rseq_exit_to_user_mode_restart include/linux/rseq_entry.h:703 [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+0x34f/0xa40 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 end_time.i.i created at:
 __do_sys_poll fs/select.c:1063 [inline]
 __se_sys_poll fs/select.c:1060 [inline]
 __x64_sys_poll+0x87/0x540 fs/select.c:1060
 x64_sys_call+0x3130/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:8

Bytes 0-3 of 4 are uninitialized
Memory access of size 4 starts at ffff8881052abe8c
Data copied to user address 00007f242ea6cadc

CPU: 1 UID: 0 PID: 4927 Comm: S02sysctl Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
=====================================================

Crashes (156):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/07 06:26 upstream 364465ab19de c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/06 22:32 upstream 6c68fa601b49 c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/06 20:35 upstream fcaeecb8b0cd c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/06 17:26 upstream 0d8395707651 c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/05 20:19 upstream 0d8395707651 cd5b1963 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/05 07:38 upstream c21bb4193868 b3eac40e .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/04 22:47 upstream c21bb4193868 d4abbeac .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/04 21:04 upstream 31996e14bd59 d4abbeac .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/04 19:08 upstream 562bfb501c54 d4abbeac .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/04 12:41 upstream 848acc8ffe1b d4abbeac .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/03 23:12 upstream 848acc8ffe1b a68cb31b .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/03 19:45 upstream c8e0d43058e6 a68cb31b .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/03 17:34 upstream 075b74841bd0 a68cb31b .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/03 00:31 upstream 075b74841bd0 e611ffe1 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/02 22:07 upstream f5a7e2ae5f0a e611ffe1 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/02 19:54 upstream bd1dde877520 e611ffe1 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/01 18:06 upstream 2d2338c93da7 e611ffe1 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/01 07:45 upstream 02dc699f83d0 e611ffe1 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/01 06:02 upstream 02dc699f83d0 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/01 00:14 upstream a2cf4ef33184 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 14:27 upstream 8ba098e6b6ff 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 02:57 upstream 8ba098e6b6ff aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 01:51 upstream e05b559f9cda aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 00:19 upstream 3708dd948844 aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 20:16 upstream 11028ab62899 aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 07:47 upstream 11028ab62899 2377cd3d .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/28 04:45 upstream 62cc90241548 45ae1df4 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/27 22:52 upstream 62cc90241548 4cb2b096 .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
2026/08/07 11:36 upstream f9a2394a2348 e4ef95d6 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/07 08:31 upstream f9a2394a2348 c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/07 05:25 upstream 364465ab19de c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/07 02:31 upstream c0a27675eaf0 c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/06 18:58 upstream fcaeecb8b0cd c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/06 16:08 upstream 0d8395707651 c38879ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/05 17:19 upstream 0d8395707651 b3eac40e .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/04 23:51 upstream c21bb4193868 d4abbeac .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/04 00:13 upstream 848acc8ffe1b a68cb31b .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/01 09:09 upstream 02dc699f83d0 e611ffe1 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/08/01 01:47 upstream 0131b508c0e2 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 22:42 upstream a2cf4ef33184 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 20:56 upstream 6269cc6f52c6 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 19:28 upstream 596254ecc5b7 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 15:49 upstream 8ba098e6b6ff 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 21:33 upstream 3708dd948844 aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 18:53 upstream 11028ab62899 aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 06:22 upstream 11028ab62899 2377cd3d .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 01:43 upstream 11028ab62899 cb1587ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/30 00:14 upstream fc46aed51f62 cb1587ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/29 14:12 upstream fc02acf6ac0c cb1587ea .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/28 23:56 upstream fc02acf6ac0c 19622d9d .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/28 19:29 upstream 3b5f4b83c4ab 19622d9d .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/28 15:54 upstream 62cc90241548 19622d9d .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root upstream test error: KMSAN: kernel-infoleak in irqentry_exit
2026/07/28 03:26 upstream 62cc90241548 45ae1df4 .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.