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KMSAN: uninit-value in hfs_cat_keycmp (2)

Status: upstream: reported C repro on 2024/01/10 10:16
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+04486d87f6240a004c85@syzkaller.appspotmail.com
First crash: 495d, last: 2d00h
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] hfs: fix uninit-value in hfs_cat_keycmp 1 (1) 2024/03/03 04:14
[syzbot] [hfs?] KMSAN: uninit-value in hfs_cat_keycmp (2) 1 (4) 2024/03/03 03:58
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in hfs_cat_keycmp hfs 5 568d 665d 0/28 closed as invalid on 2023/12/22 16:00
upstream KASAN: slab-out-of-bounds Read in hfs_cat_keycmp hfs C error done 2 811d 876d 22/28 fixed on 2023/02/24 13:50
linux-4.19 KASAN: slab-out-of-bounds Read in hfs_cat_keycmp C error 1 892d 892d 0/1 upstream: reported C repro on 2022/12/02 03:19
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/04/03 02:03 26m retest repro upstream report log
2025/03/19 13:29 24m retest repro upstream report log
2025/03/19 13:20 20m retest repro upstream report log
2025/01/08 12:41 22m retest repro upstream report log
2025/01/08 12:41 29m retest repro upstream report log
2024/10/13 13:00 19m retest repro upstream report log
2024/08/04 11:45 27m retest repro upstream report log
2024/05/26 10:52 21m retest repro upstream error
2024/03/17 10:30 20m retest repro upstream report log
2024/03/03 03:09 26m eadavis@qq.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log

Sample crash report:
loop0: detected capacity change from 0 to 64
=====================================================
BUG: KMSAN: uninit-value in hfs_cat_keycmp+0x154/0x210 fs/hfs/catalog.c:178
 hfs_cat_keycmp+0x154/0x210 fs/hfs/catalog.c:178
 __hfs_brec_find+0x254/0x830 fs/hfs/bfind.c:75
 hfs_brec_find+0x436/0x980 fs/hfs/bfind.c:138
 hfs_brec_read+0x3f/0x1a0 fs/hfs/bfind.c:165
 hfs_cat_find_brec+0xe6/0x400 fs/hfs/catalog.c:194
 hfs_fill_super+0x6a3/0xad0 fs/hfs/super.c:350
 get_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636
 get_tree_bdev+0x37/0x50 fs/super.c:1659
 hfs_get_tree+0x34/0x40 fs/hfs/super.c:386
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507
 path_mount+0x742/0x1f10 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x722/0x810 fs/namespace.c:4034
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4034
 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4125 [inline]
 slab_alloc_node mm/slub.c:4168 [inline]
 __do_kmalloc_node mm/slub.c:4297 [inline]
 __kmalloc_noprof+0x923/0x1230 mm/slub.c:4310
 kmalloc_noprof include/linux/slab.h:905 [inline]
 hfs_find_init+0x91/0x250 fs/hfs/bfind.c:21
 hfs_fill_super+0x63e/0xad0 fs/hfs/super.c:347
 get_tree_bdev_flags+0x6ec/0x910 fs/super.c:1636
 get_tree_bdev+0x37/0x50 fs/super.c:1659
 hfs_get_tree+0x34/0x40 fs/hfs/super.c:386
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3507
 path_mount+0x742/0x1f10 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x722/0x810 fs/namespace.c:4034
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4034
 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 5777 Comm: syz-executor155 Not tainted 6.13.0-rc2-syzkaller-00292-ga446e965a188 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
=====================================================

Crashes (22):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/14 16:38 upstream a446e965a188 7cbfbb3a .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2024/03/02 23:33 upstream 5ad3cb0ed525 25905f5d .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2025/05/10 03:14 upstream 02ddfb981de8 bb813bcc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/17 05:49 upstream 0ad2507d5d93 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/17 05:49 upstream 0ad2507d5d93 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/15 13:58 upstream 7ff71e6d9239 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/15 13:58 upstream 7ff71e6d9239 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/25 01:21 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/25 01:20 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/14 14:21 upstream a446e965a188 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/14 14:21 upstream a446e965a188 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2024/01/30 23:15 upstream 9f8413c4a66f 7f400fcb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/17 09:01 upstream 0ad2507d5d93 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/17 09:01 upstream 0ad2507d5d93 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/15 18:10 upstream 7ff71e6d9239 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2025/02/15 18:09 upstream 7ff71e6d9239 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/25 04:57 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/25 04:56 upstream 9b2ffa6148b1 444551c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/14 19:17 upstream a446e965a188 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2024/12/14 19:17 upstream a446e965a188 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2024/01/03 03:43 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
2024/01/03 03:17 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_cat_keycmp
* Struck through repros no longer work on HEAD.