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KMSAN: uninit-value in v9fs_evict_inode

Status: upstream: reported C repro on 2024/03/16 11:15
Subsystems: v9fs
[Documentation on labels]
Reported-by: syzbot+eb83fe1cce5833cd66a0@syzkaller.appspotmail.com
Fix commit: 6630036b7c22 fs/9p: fix uninitialized values during inode evict
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-net-next-test-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 42d, last: 30d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 6.8 09/25] fs/9p: fix uninitialized values during inode evict 1 (1) 2024/04/07 13:10
[syzbot] [v9fs?] KMSAN: uninit-value in v9fs_evict_inode 3 (8) 2024/03/19 13:56
[PATCH] fs/9p: fix uninitialized values during inode evict 1 (1) 2024/03/19 13:50
▶ ▼ Last patch testing requests (4)
Created Duration User Patch Repo Result
2024/03/19 13:56 8h14m eric.vanhensbergen@linux.dev git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs.git b4/fix-evict-uninitialized-value error OK
2024/03/19 10:18 20m charmitro@posteo.net patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2024/03/18 21:49 4h16m charmitro@posteo.net patch upstream error OK
2024/03/18 15:48 4h47m charmitro@posteo.net patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master error OK

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in fscache_relinquish_cookie include/linux/fscache.h:307 [inline]
BUG: KMSAN: uninit-value in v9fs_evict_inode+0x109/0x130 fs/9p/vfs_inode.c:356
 fscache_relinquish_cookie include/linux/fscache.h:307 [inline]
 v9fs_evict_inode+0x109/0x130 fs/9p/vfs_inode.c:356
 evict+0x3ae/0xa60 fs/inode.c:667
 iput_final fs/inode.c:1741 [inline]
 iput+0x9ca/0xe10 fs/inode.c:1767
 iget_failed+0x15e/0x180 fs/bad_inode.c:248
 v9fs_fid_iget_dotl+0x375/0x570 fs/9p/vfs_inode_dotl.c:96
 v9fs_get_inode_from_fid fs/9p/v9fs.h:230 [inline]
 v9fs_mount+0xc02/0x12b0 fs/9p/vfs_super.c:142
 legacy_get_tree+0x114/0x290 fs/fs_context.c:662
 vfs_get_tree+0xa7/0x570 fs/super.c:1797
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352
 path_mount+0x742/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x725/0x810 fs/namespace.c:3875
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was created at:
 __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 alloc_slab_page mm/slub.c:2175 [inline]
 allocate_slab mm/slub.c:2338 [inline]
 new_slab+0x2de/0x1400 mm/slub.c:2391
 ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525
 __slab_alloc mm/slub.c:3610 [inline]
 __slab_alloc_node mm/slub.c:3663 [inline]
 slab_alloc_node mm/slub.c:3835 [inline]
 kmem_cache_alloc_lru+0x6d7/0xbe0 mm/slub.c:3864
 alloc_inode_sb include/linux/fs.h:3089 [inline]
 v9fs_alloc_inode+0x62/0x130 fs/9p/vfs_inode.c:228
 alloc_inode+0x86/0x460 fs/inode.c:261
 iget_locked+0x2bf/0xee0 fs/inode.c:1280
 v9fs_fid_iget_dotl+0x7f/0x570 fs/9p/vfs_inode_dotl.c:62
 v9fs_get_inode_from_fid fs/9p/v9fs.h:230 [inline]
 v9fs_mount+0xc02/0x12b0 fs/9p/vfs_super.c:142
 legacy_get_tree+0x114/0x290 fs/fs_context.c:662
 vfs_get_tree+0xa7/0x570 fs/super.c:1797
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352
 path_mount+0x742/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x725/0x810 fs/namespace.c:3875
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

CPU: 1 PID: 5014 Comm: syz-executor294 Not tainted 6.8.0-syzkaller-11767-g23956900041d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
=====================================================

Crashes (5206):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/22 01:01 upstream 23956900041d 6753db5c .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/16 10:26 upstream 66a27abac311 d615901c .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 09:07 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 08:44 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 07:44 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 07:17 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 06:27 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 05:42 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 04:14 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 03:48 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 03:23 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 02:53 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 01:57 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 01:45 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 22:48 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 22:06 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 21:05 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 20:42 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 20:07 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 19:51 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 19:24 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 18:28 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 17:49 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 17:07 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 16:15 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 15:33 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 14:56 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 09:55 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 09:32 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 08:31 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 08:07 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 06:55 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 06:07 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 05:07 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/28 04:48 upstream 962490525cff 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 23:34 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 23:09 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 22:29 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 21:44 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 21:31 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 20:24 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 16:38 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 15:51 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 15:09 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
2024/03/27 14:29 upstream 7033999ecd7b 454571b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in v9fs_evict_inode
* Struck through repros no longer work on HEAD.