syzbot


KMSAN: uninit-value in ntfs_read_hdr

Status: upstream: reported on 2024/11/10 05:38
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+6b97c7810fd3600a03e0@syzkaller.appspotmail.com
First crash: 38d, last: 25d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ntfs3?] KMSAN: uninit-value in ntfs_read_hdr 0 (1) 2024/11/10 05:38

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in ntfs_dir_emit fs/ntfs3/dir.c:333 [inline]
BUG: KMSAN: uninit-value in ntfs_read_hdr+0xfba/0x1290 fs/ntfs3/dir.c:383
 ntfs_dir_emit fs/ntfs3/dir.c:333 [inline]
 ntfs_read_hdr+0xfba/0x1290 fs/ntfs3/dir.c:383
 ntfs_readdir+0xf48/0x1a10 fs/ntfs3/dir.c:494
 iterate_dir+0x5b3/0x9e0 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:407 [inline]
 __se_sys_getdents64+0x16e/0x550 fs/readdir.c:392
 __x64_sys_getdents64+0x96/0xe0 fs/readdir.c:392
 x64_sys_call+0x3430/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:218
 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 stored to memory at:
 ntfs_read_run_nb+0x786/0x1070 fs/ntfs3/fsntfs.c:1252
 ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1313
 indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067
 ntfs_readdir+0xe07/0x1a10 fs/ntfs3/dir.c:489
 iterate_dir+0x5b3/0x9e0 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:407 [inline]
 __se_sys_getdents64+0x16e/0x550 fs/readdir.c:392
 __x64_sys_getdents64+0x96/0xe0 fs/readdir.c:392
 x64_sys_call+0x3430/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:218
 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 stored to memory at:
 ntfs_write_bh+0x652/0xdb0 fs/ntfs3/fsntfs.c:1450
 indx_write fs/ntfs3/index.c:1027 [inline]
 indx_delete_entry+0x1a9e/0x7e20 fs/ntfs3/index.c:2330
 ni_remove_name+0x345/0xc30 fs/ntfs3/frecord.c:2994
 ni_rename+0x19b/0x240 fs/ntfs3/frecord.c:3155
 ntfs_rename+0xdb5/0x1300 fs/ntfs3/namei.c:317
 vfs_rename+0x1d9d/0x2280 fs/namei.c:5013
 do_renameat2+0x18cc/0x1d50 fs/namei.c:5170
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0xe8/0x140 fs/namei.c:5215
 x64_sys_call+0x1e4d/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:83
 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 stored to memory at:
 ntfs_read_run_nb+0x786/0x1070 fs/ntfs3/fsntfs.c:1252
 ntfs_read_bh+0x64/0xde0 fs/ntfs3/fsntfs.c:1313
 indx_read+0x44e/0x17b0 fs/ntfs3/index.c:1067
 indx_find+0xd12/0x1440 fs/ntfs3/index.c:1181
 indx_delete_entry+0xfe4/0x7e20 fs/ntfs3/index.c:2294
 ni_remove_name+0x345/0xc30 fs/ntfs3/frecord.c:2994
 ni_rename+0x19b/0x240 fs/ntfs3/frecord.c:3155
 ntfs_rename+0xdb5/0x1300 fs/ntfs3/namei.c:317
 vfs_rename+0x1d9d/0x2280 fs/namei.c:5013
 do_renameat2+0x18cc/0x1d50 fs/namei.c:5170
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0xe8/0x140 fs/namei.c:5215
 x64_sys_call+0x1e4d/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:83
 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 stored to memory at:
 ntfs_write_bh+0x652/0xdb0 fs/ntfs3/fsntfs.c:1450
 indx_write fs/ntfs3/index.c:1027 [inline]
 indx_insert_into_buffer+0xd8f/0x2010 fs/ntfs3/index.c:1811
 indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1988
 ni_add_name+0xe5d/0x10d0 fs/ntfs3/frecord.c:3120
 ni_rename+0x9b/0x240 fs/ntfs3/frecord.c:3152
 ntfs_rename+0xdb5/0x1300 fs/ntfs3/namei.c:317
 vfs_rename+0x1d9d/0x2280 fs/namei.c:5013
 do_renameat2+0x18cc/0x1d50 fs/namei.c:5170
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0xe8/0x140 fs/namei.c:5215
 x64_sys_call+0x1e4d/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:83
 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 stored to memory at:
 hdr_insert_de fs/ntfs3/index.c:838 [inline]
 indx_insert_into_buffer+0xcdf/0x2010 fs/ntfs3/index.c:1807
 indx_insert_entry+0xa3c/0xee0 fs/ntfs3/index.c:1988
 ni_add_name+0xe5d/0x10d0 fs/ntfs3/frecord.c:3120
 ni_rename+0x9b/0x240 fs/ntfs3/frecord.c:3152
 ntfs_rename+0xdb5/0x1300 fs/ntfs3/namei.c:317
 vfs_rename+0x1d9d/0x2280 fs/namei.c:5013
 do_renameat2+0x18cc/0x1d50 fs/namei.c:5170
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0xe8/0x140 fs/namei.c:5215
 x64_sys_call+0x1e4d/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:83
 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:4091 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 kmem_cache_alloc_noprof+0x637/0xb20 mm/slub.c:4141
 ntfs_rename+0x847/0x1300 fs/ntfs3/namei.c:291
 vfs_rename+0x1d9d/0x2280 fs/namei.c:5013
 do_renameat2+0x18cc/0x1d50 fs/namei.c:5170
 __do_sys_rename fs/namei.c:5217 [inline]
 __se_sys_rename fs/namei.c:5215 [inline]
 __x64_sys_rename+0xe8/0x140 fs/namei.c:5215
 x64_sys_call+0x1e4d/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:83
 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: 19293 Comm: syz-executor Tainted: G        W          6.12.0-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
=====================================================

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/18 18:40 upstream adc218676eef 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/18 18:40 upstream adc218676eef 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/18 18:40 upstream adc218676eef 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/18 18:40 upstream adc218676eef 571351cb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/17 17:20 upstream 4a5df3796467 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/17 01:12 upstream e8bdb3c8be08 cfe3a04a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/09 19:25 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/09 19:25 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/06 05:37 upstream 2e1b3cc9d7f7 3a465482 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/09 23:09 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ntfs_read_hdr
2024/11/09 23:08 upstream da4373fbcf00 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ntfs_read_hdr
* Struck through repros no longer work on HEAD.