KMSAN: uninit-value in hfs_read_inode

Status: fixed on 2025/05/06 15:33
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+2db3c7526ba68f4ea776@syzkaller.appspotmail.com
Fix commit: b905bafdea21 hfs: Sanity check the root record
First crash: 630d, last: 615d
▶ ▼ Discussions (9)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 5.4 1/4] mac802154: check local interfaces before deleting sdata list 2 (2) 2025/01/13 18:36
[PATCH AUTOSEL 5.10 1/5] mac802154: check local interfaces before deleting sdata list 2 (2) 2025/01/13 18:36
[PATCH AUTOSEL 5.15 1/6] mac802154: check local interfaces before deleting sdata list 2 (2) 2025/01/13 18:35
[PATCH AUTOSEL 6.1 01/10] mac802154: check local interfaces before deleting sdata list 2 (2) 2025/01/13 18:35
[PATCH AUTOSEL 6.6 01/10] mac802154: check local interfaces before deleting sdata list 2 (2) 2025/01/13 18:35
[PATCH AUTOSEL 6.12 01/20] mac802154: check local interfaces before deleting sdata list 3 (3) 2025/01/13 18:34
[PATCH v2] hfs: Sanity check the root record 3 (3) 2024/12/02 14:32
[PATCH] hfs: Sanity check the root record 5 (5) 2024/12/01 04:27
[syzbot] [hfs?] KMSAN: uninit-value in hfs_read_inode 1 (3) 2024/11/22 22:52
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/12/02 18:35 28m retest repro upstream report log
2024/11/22 22:21 29m leocstone@gmail.com patch upstream OK log

Sample crash report:
loop0: detected capacity change from 0 to 64
=====================================================
BUG: KMSAN: uninit-value in hfs_inode_read_fork fs/hfs/inode.c:287 [inline]
BUG: KMSAN: uninit-value in hfs_read_inode+0x10ae/0x1690 fs/hfs/inode.c:343
 hfs_inode_read_fork fs/hfs/inode.c:287 [inline]
 hfs_read_inode+0x10ae/0x1690 fs/hfs/inode.c:343
 inode_insert5+0x1dd/0x970 fs/inode.c:1281
 iget5_locked+0xfe/0x1d0 fs/inode.c:1338
 hfs_iget+0x121/0x240 fs/hfs/inode.c:403
 hfs_fill_super+0x2098/0x23c0 fs/hfs/super.c:431
 mount_bdev+0x39a/0x520 fs/super.c:1693
 hfs_mount+0x4d/0x60 fs/hfs/super.c:457
 legacy_get_tree+0x114/0x290 fs/fs_context.c:662
 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+0x255a/0x3ba0 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

Local variable rec created at:
 hfs_fill_super+0x67/0x23c0 fs/hfs/super.c:383
 mount_bdev+0x39a/0x520 fs/super.c:1693

CPU: 1 UID: 0 PID: 5790 Comm: syz-executor415 Not tainted 6.12.0-rc7-syzkaller-00216-gf66d6acccbc0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
=====================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/18 07:13 upstream f66d6acccbc0 cfe3a04a .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_read_inode
2024/11/18 04:41 upstream f66d6acccbc0 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_read_inode
* Struck through repros no longer work on HEAD.