syzbot


KASAN: stack-out-of-bounds Read in ntfs_set_inode

Status: auto-obsoleted due to no activity on 2023/10/31 09:19
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+cbdd49fbb39696c71041@syzkaller.appspotmail.com
First crash: 463d, last: 349d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ntfs3?] KASAN: stack-out-of-bounds Read in ntfs_set_inode 0 (2) 2023/07/07 21:47
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in ntfs_set_inode ntfs3 8 623d 625d 0/27 auto-obsoleted due to no activity on 2023/02/04 09:17
Last patch testing requests (3)
Created Duration User Patch Repo Result
2023/10/31 08:52 26m retest repro upstream OK log
2023/10/05 09:41 17m almaz.alexandrovich@paragon-software.com https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master report log
2023/08/22 08:06 25m retest repro upstream report log

Sample crash report:
loop0: detected capacity change from 0 to 4096
ntfs3: loop0: Different NTFS sector size (1024) and media sector size (512).
==================================================================
BUG: KASAN: stack-out-of-bounds in ino_get fs/ntfs3/ntfs.h:193 [inline]
BUG: KASAN: stack-out-of-bounds in ntfs_set_inode+0x65/0x70 fs/ntfs3/inode.c:514
Read of size 4 at addr ffffc9000bccfcc7 by task syz-executor.0/6246

CPU: 0 PID: 6246 Comm: syz-executor.0 Not tainted 6.4.0-syzkaller-12274-g5133c9e51de4 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364
 print_report mm/kasan/report.c:475 [inline]
 kasan_report+0x11d/0x130 mm/kasan/report.c:588
 ino_get fs/ntfs3/ntfs.h:193 [inline]
 ntfs_set_inode+0x65/0x70 fs/ntfs3/inode.c:514
 inode_insert5+0x125/0x660 fs/inode.c:1231
 iget5_locked fs/inode.c:1289 [inline]
 iget5_locked+0x225/0x2c0 fs/inode.c:1278
 ntfs_iget5+0xd2/0x3670 fs/ntfs3/inode.c:523
 ntfs_fill_super+0x3196/0x3c20 fs/ntfs3/super.c:1272
 get_tree_bdev+0x43e/0x7d0 fs/super.c:1318
 vfs_get_tree+0x8d/0x350 fs/super.c:1519
 do_new_mount fs/namespace.c:3335 [inline]
 path_mount+0x136e/0x1e70 fs/namespace.c:3662
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount fs/namespace.c:3861 [inline]
 __x64_sys_mount+0x283/0x300 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f251e48d8ba
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f251f242f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000001f73b RCX: 00007f251e48d8ba
RDX: 0000000020000000 RSI: 000000002001f740 RDI: 00007f251f242fe0
RBP: 00007f251f243020 R08: 00007f251f243020 R09: 0000000001000000
R10: 0000000001000000 R11: 0000000000000246 R12: 0000000020000000
R13: 000000002001f740 R14: 00007f251f242fe0 R15: 0000000020000040
 </TASK>

The buggy address belongs to stack of task syz-executor.0/6246
 and is located at offset 127 in frame:
 ntfs_fill_super+0x0/0x3c20 fs/ntfs3/super.c:474

This frame has 5 objects:
 [48, 52) 'vcn'
 [64, 68) 'lcn'
 [80, 84) 'len'
 [96, 104) 'tt'
 [128, 136) 'ref'

The buggy address belongs to the virtual mapping at
 [ffffc9000bcc8000, ffffc9000bcd1000) created by:
 kernel_clone+0xeb/0x890 kernel/fork.c:2911

The buggy address belongs to the physical page:
page:ffffea00009e2080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27882
memcg:ffff888020cd9a82
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888020cd9a82
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 6245, tgid 6245 (syz-executor.0), ts 379453839813, free_ts 308972643812
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1570
 prep_new_page mm/page_alloc.c:1577 [inline]
 get_page_from_freelist+0xfed/0x2d30 mm/page_alloc.c:3221
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4477
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279
 vm_area_alloc_pages mm/vmalloc.c:3059 [inline]
 __vmalloc_area_node mm/vmalloc.c:3135 [inline]
 __vmalloc_node_range+0xb1c/0x14c0 mm/vmalloc.c:3316
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct kernel/fork.c:1112 [inline]
 copy_process+0x13bb/0x75c0 kernel/fork.c:2329
 kernel_clone+0xeb/0x890 kernel/fork.c:2911
 __do_sys_clone+0xba/0x100 kernel/fork.c:3054
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1161 [inline]
 free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2348
 free_unref_page+0x33/0x370 mm/page_alloc.c:2443
 slab_destroy mm/slab.c:1608 [inline]
 slabs_destroy+0x85/0xc0 mm/slab.c:1628
 cache_flusharray mm/slab.c:3341 [inline]
 ___cache_free+0x2c5/0x410 mm/slab.c:3404
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:750 [inline]
 slab_alloc_node mm/slab.c:3237 [inline]
 __kmem_cache_alloc_node+0x206/0x410 mm/slab.c:3521
 __do_kmalloc_node mm/slab_common.c:984 [inline]
 __kmalloc+0x4e/0x190 mm/slab_common.c:998
 kmalloc include/linux/slab.h:586 [inline]
 inotify_handle_inode_event+0x1c2/0x5f0 fs/notify/inotify/inotify_fsnotify.c:96
 inotify_ignored_and_remove_idr+0x28/0x70 fs/notify/inotify/inotify_user.c:527
 fsnotify_free_mark+0xe9/0x140 fs/notify/mark.c:490
 __do_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:817 [inline]
 __se_sys_inotify_rm_watch fs/notify/inotify/inotify_user.c:794 [inline]
 __x64_sys_inotify_rm_watch+0x11c/0x1a0 fs/notify/inotify/inotify_user.c:794
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffffc9000bccfb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000bccfc00: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04
>ffffc9000bccfc80: f2 04 f2 04 f2 00 f2 f2 f2 00 f3 f3 f3 00 00 00
                                           ^
 ffffc9000bccfd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000bccfd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1
==================================================================

Crashes (9):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/07 21:46 upstream 5133c9e51de4 b03742d1 .config console log report syz [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-qemu-upstream KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/07/07 21:25 upstream 5133c9e51de4 b03742d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/05/10 21:08 upstream ad2fd53a7870 0fbd49f4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/04/13 11:08 upstream de4664485abb 82d5e53e .config console log report info ci-qemu-upstream KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/03/29 14:37 upstream fcd476ea6a88 f325deb0 .config console log report info ci-qemu-upstream KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/06/14 02:21 upstream 15adb51c04cc d2ee9228 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/04/18 20:26 upstream af67688dca57 d931e9f0 .config console log report info ci-qemu-upstream-386 KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/04/05 20:33 upstream 99ddf2254feb 8b834965 .config console log report info ci-qemu-upstream-386 KASAN: stack-out-of-bounds Read in ntfs_set_inode
2023/03/16 05:10 upstream 9c1bec9c0b08 18b58603 .config console log report info ci-qemu-upstream-386 KASAN: stack-out-of-bounds Read in ntfs_set_inode
* Struck through repros no longer work on HEAD.