KMSAN: kernel-infoleak in irqentry_exit (3)

Status: upstream: reported on 2026/07/24 12:25
Subsystems: kernel
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+fb19c2cd5a21000b7336@syzkaller.appspotmail.com
First crash: 11d, last: now
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ID Workflow Result Correct Bug Created Started Finished Revision Error
540792ef assessment-security DenialOfService: ❌ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ KMSAN: kernel-infoleak in irqentry_exit (3) 2026/07/22 00:01 2026/07/22 00:01 2026/07/22 01:07 0d5a7c31

			
		
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[syzbot] [kernel?] KMSAN: kernel-infoleak in irqentry_exit (3) 0 (1) 2026/07/24 12:25
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: kernel-infoleak in irqentry_exit prio:high kernel 9 61732 16d 61d 29/29 fixed on 2026/07/15 08:27
upstream KMSAN: kernel-infoleak in irqentry_exit (2) kernel prio:high 9 11110 11d 12d 29/29 fixed on 2026/07/20 12:16

Sample crash report:
=====================================================
BUG: KMSAN: kernel-infoleak in rseq_set_ids_get_csaddr include/linux/rseq_entry.h:502 [inline]
BUG: KMSAN: kernel-infoleak in rseq_update_usr include/linux/rseq_entry.h:536 [inline]
BUG: KMSAN: kernel-infoleak in rseq_exit_user_update include/linux/rseq_entry.h:645 [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+0x4a6/0xa40 kernel/entry/common.c:165
 rseq_set_ids_get_csaddr include/linux/rseq_entry.h:502 [inline]
 rseq_update_usr include/linux/rseq_entry.h:536 [inline]
 rseq_exit_user_update include/linux/rseq_entry.h:645 [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+0x4a6/0xa40 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 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+0x334c/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:138

Bytes 0-3 of 4 are uninitialized
Memory access of size 4 starts at ffff888118bffe78
Data copied to user address 00007fb7cc554680

CPU: 1 UID: 0 PID: 5018 Comm: v4l_id Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
=====================================================

Crashes (24247):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/31 21:25 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 20:58 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 20:45 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 20:33 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 20:19 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 20:09 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 19:55 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 19:41 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 19:15 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 18:57 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 18:33 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 18:22 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 18:08 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 17:36 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 17:25 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 17:13 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 17:00 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 16:34 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 16:19 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 15:52 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 15:35 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 15:19 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 15:00 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 14:46 upstream fc02acf6ac0c 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 14:35 upstream fc02acf6ac0c 7664cf44 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 13:22 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 13:13 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 12:59 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 12:47 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 12:35 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 12:10 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 11:48 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 11:37 upstream fc02acf6ac0c aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/24 11:52 upstream 4a50a141f05a 544adce9 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/21 23:43 upstream 4a50a141f05a 7c5de9c3 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/20 12:16 upstream 4a50a141f05a de6a700d .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 21:40 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 21:10 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 19:26 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 18:46 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 17:52 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 16:47 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 16:09 upstream e05b559f9cda 7664cf44 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 13:34 upstream e05b559f9cda aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 12:22 upstream e05b559f9cda aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
2026/07/31 11:58 upstream e05b559f9cda aaffb173 .config console log report [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: kernel-infoleak in irqentry_exit
* Struck through repros no longer work on HEAD.