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WARNING: lock held when returning to user space in mnt_want_write

Status: closed as invalid on 2026/01/07 12:42
Subsystems: fs
[Documentation on labels]
First crash: 52d, last: 50d
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/12/11 09:00 24m retest repro linux-next OK log
2025/12/11 09:00 24m retest repro linux-next OK log
2025/12/11 09:00 41m retest repro linux-next OK log

Sample crash report:
================================================
WARNING: lock held when returning to user space!
syzkaller #0 Not tainted
------------------------------------------------
syz.4.292/7284 is leaving the kernel with locks still held!
1 lock held by syz.4.292/7284:
 #0: ffff888030b00420 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:509

Crashes (163):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/27 04:13 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/27 02:46 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/27 01:46 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/27 01:20 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 23:47 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 22:46 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 22:00 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 20:56 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 19:52 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 18:46 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 17:42 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 16:00 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 14:50 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 13:24 linux-next 663d0d1af3fa d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 09:33 linux-next 663d0d1af3fa 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 07:12 linux-next 663d0d1af3fa 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 06:03 linux-next 663d0d1af3fa 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 03:41 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 01:51 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/26 00:46 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 23:45 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 22:37 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 22:31 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 21:31 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 20:26 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 18:51 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 17:30 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 15:26 linux-next 92fd6e84175b 64219f15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 13:37 linux-next 92fd6e84175b 64219f15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 13:19 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 13:09 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 13:09 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 13:08 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 12:52 linux-next 92fd6e84175b 64219f15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 12:50 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 12:48 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 12:48 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 12:45 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:57 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:56 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:54 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:53 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:53 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:53 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:51 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
2025/11/25 11:44 linux-next 92fd6e84175b 64219f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING: lock held when returning to user space in mnt_want_write
* Struck through repros no longer work on HEAD.