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KMSAN: uninit-value in hfs_brec_find

Status: upstream: reported C repro on 2022/12/08 08:26
Labels: hfs (incorrect?)
Reported-by: syzbot+5ce571007a695806e949@syzkaller.appspotmail.com
First crash: 180d, last: 7d16h
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] KMSAN: uninit-value in hfs_brec_find 0 (2) 2023/02/06 12:05

Sample crash report:
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
hfs: keylen 9474 too large
=====================================================
BUG: KMSAN: uninit-value in hfs_brec_find+0x671/0x9b0 fs/hfs/bfind.c:141
 hfs_brec_find+0x671/0x9b0 fs/hfs/bfind.c:141
 hfs_brec_read+0x3b/0x190 fs/hfs/bfind.c:165
 hfs_cat_find_brec+0xfb/0x450 fs/hfs/catalog.c:194
 hfs_fill_super+0x1f49/0x2400 fs/hfs/super.c:419
 mount_bdev+0x508/0x840 fs/super.c:1359
 hfs_mount+0x49/0x60 fs/hfs/super.c:456
 legacy_get_tree+0x10c/0x280 fs/fs_context.c:610
 vfs_get_tree+0xa1/0x500 fs/super.c:1489
 do_new_mount+0x694/0x1580 fs/namespace.c:3145
 path_mount+0x71a/0x1eb0 fs/namespace.c:3475
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x734/0x840 fs/namespace.c:3674
 __ia32_sys_mount+0xdf/0x140 fs/namespace.c:3674
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Local variable fd created at:
 hfs_fill_super+0x5e/0x2400 fs/hfs/super.c:381
 mount_bdev+0x508/0x840 fs/super.c:1359

CPU: 0 PID: 4991 Comm: syz-executor151 Not tainted 6.2.0-rc6-syzkaller-80422-geda666ff2276 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
=====================================================

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/02/06 12:05 https://github.com/google/kmsan.git master eda666ff2276 be607b78 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/05/30 03:45 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/04/30 21:19 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/04/24 03:42 https://github.com/google/kmsan.git master 0255004d2a8e 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/04/22 21:02 https://github.com/google/kmsan.git master 0255004d2a8e 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/04/21 12:13 https://github.com/google/kmsan.git master 0255004d2a8e 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/03/26 09:04 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/03/19 00:09 https://github.com/google/kmsan.git master 34add094f9de 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/03/17 19:30 https://github.com/google/kmsan.git master 34add094f9de 18b58603 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/21 17:51 https://github.com/google/kmsan.git master 224e1375d540 f949448d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/21 03:36 https://github.com/google/kmsan.git master 224e1375d540 4f5f5209 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/21 03:27 https://github.com/google/kmsan.git master 224e1375d540 4f5f5209 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/21 01:29 https://github.com/google/kmsan.git master 224e1375d540 4f5f5209 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/12 13:21 https://github.com/google/kmsan.git master 8c89ecf5c13b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/08 00:45 https://github.com/google/kmsan.git master 8c89ecf5c13b 15c3d445 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/02/06 07:16 https://github.com/google/kmsan.git master eda666ff2276 be607b78 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2023/01/20 16:20 https://github.com/google/kmsan.git master e919e2b1bc1c 559a440a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2022/12/25 00:33 https://github.com/google/kmsan.git master 5c6259d6d19f 9da18ae8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
2022/12/07 22:53 https://github.com/google/kmsan.git master 30d2727189c5 d88f3abb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_brec_find
* Struck through repros no longer work on HEAD.