[syzbot] [ntfs?] KASAN: slab-use-after-free Read in ntfs_test_inode

From: syzbot
Date: Tue Jan 09 2024 - 15:01:54 EST

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Hello,

syzbot found the following issue on:

HEAD commit: 1f874787ed9a Merge tag 'net-6.7-rc9' of git://git.kernel.o..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14e62f89e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=655f8abe9fe69b3b
dashboard link: https://syzkaller.appspot.com/bug?extid=79de0e28cb0a65ee635e
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/323bf803118f/disk-1f874787.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f4354a1804a9/vmlinux-1f874787.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0bf2547383ed/bzImage-1f874787.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+79de0e28cb0a65ee635e@xxxxxxxxxxxxxxxxxxxxxxxxx

ntfs: volume version 3.1.
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in NInoAttr fs/ntfs/inode.h:200 [inline]
BUG: KASAN: slab-use-after-free in ntfs_test_inode+0x7f/0x2e0 fs/ntfs/inodec:55
Read of size 8 at addr ffff888082831fe0 by task syz-executor.3/6682

CPU: 1 PID: 6682 Comm: syz-executor.3 Not tainted 6.7.0-rc8-syzkaller-00119-g1f874787ed9a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0x163/0x540 mm/kasan/report.c:475
kasan_report+0x142/0x170 mm/kasan/report.c:588
kasan_check_range+0x27e/0x290 mm/kasan/generic.c:187
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
NInoAttr fs/ntfs/inode.h:200 [inline]
ntfs_test_inode+0x7f/0x2e0 fs/ntfs/inode.c:55
find_inode+0x16f/0x430 fs/inode.c:903
ilookup5_nowait fs/inode.c:1458 [inline]
ilookup5+0xa1/0x200 fs/inode.c:1487
iget5_locked+0x37/0x270 fs/inode.c:1268
ntfs_iget+0xc4/0x190 fs/ntfs/inode.c:168
load_and_check_logfile+0x3f/0xd0 fs/ntfs/super.c:1216
load_system_files+0x32fb/0x4840 fs/ntfs/super.c:1949
ntfs_fill_super+0x19b3/0x2bd0 fs/ntfs/super.c:2900
mount_bdev+0x237/0x300 fs/super.c:1650
legacy_get_tree+0xef/0x190 fs/fs_context.c:662
vfs_get_tree+0x8c/0x2a0 fs/super.c:1771
do_new_mount+0x28f/0xae0 fs/namespace.c:3337
do_mount fs/namespace.c:3677 [inline]
__do_sys_mount fs/namespace.c:3886 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f19f747e3ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f19f8119ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f19f8119f80 RCX: 00007f19f747e3ea
RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007f19f8119f40
RBP: 0000000020000000 R08: 00007f19f8119f80 R09: 0000000000800804
R10: 0000000000800804 R11: 0000000000000202 R12: 0000000020000040
R13: 00007f19f8119f40 R14: 000000000001ee6e R15: 0000000020002380
</TASK>

Allocated by task 25333:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc_lru+0x108/0x240 mm/slub.c:3509
alloc_inode_sb include/linux/fs.h:2937 [inline]
reiserfs_alloc_inode+0x2a/0xc0 fs/reiserfs/super.c:642
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x65/0x1d0 fs/inode.c:1006
new_inode+0x22/0x1d0 fs/inode.c:1032
reiserfs_mkdir+0x1c0/0x8f0 fs/reiserfs/namei.c:813
xattr_mkdir fs/reiserfs/xattr.c:77 [inline]
create_privroot fs/reiserfs/xattr.c:891 [inline]
reiserfs_xattr_init+0x355/0x6c0 fs/reiserfs/xattr.c:1007
reiserfs_fill_super+0x2207/0x2620 fs/reiserfs/super.c:2175
mount_bdev+0x237/0x300 fs/super.c:1650
legacy_get_tree+0xef/0x190 fs/fs_context.c:662
vfs_get_tree+0x8c/0x2a0 fs/super.c:1771
do_new_mount+0x28f/0xae0 fs/namespace.c:3337
do_mount fs/namespace.c:3677 [inline]
__do_sys_mount fs/namespace.c:3886 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2681 [inline]
call_rcu+0x167/0xa80 kernel/rcu/tree.c:2795
dispose_list fs/inode.c:699 [inline]
evict_inodes+0x5f8/0x690 fs/inode.c:749
generic_shutdown_super+0x9d/0x2c0 fs/super.c:675
kill_block_super+0x44/0x90 fs/super.c:1667
deactivate_locked_super+0xc1/0x130 fs/super.c:484
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b

Second to last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xad/0xc0 mm/kasan/generic.c:492
__call_rcu_common kernel/rcu/tree.c:2681 [inline]
call_rcu+0x167/0xa80 kernel/rcu/tree.c:2795
reiserfs_fill_super+0x1572/0x2620 fs/reiserfs/super.c:2078
mount_bdev+0x237/0x300 fs/super.c:1650
legacy_get_tree+0xef/0x190 fs/fs_context.c:662
vfs_get_tree+0x8c/0x2a0 fs/super.c:1771
do_new_mount+0x28f/0xae0 fs/namespace.c:3337
do_mount fs/namespace.c:3677 [inline]
__do_sys_mount fs/namespace.c:3886 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

The buggy address belongs to the object at ffff888082831a80
which belongs to the cache reiser_inode_cache of size 1568
The buggy address is located 1376 bytes inside of
freed 1568-byte region [ffff888082831a80, ffff8880828320a0)

The buggy address belongs to the physical page:
page:ffffea00020a0c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880828348e0 pfn:0x82830
head:ffffea00020a0c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888021ae9b01
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff88814229d500 ffffea0000f11200 0000000000000002
raw: ffff8880828348e0 0000000080130004 00000001ffffffff ffff888021ae9b01
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 10321, tgid 10319 (syz-executor.4), ts 465005937020, free_ts 222502828644
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1544 [inline]
get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312
__alloc_pages+0x255/0x680 mm/page_alloc.c:4568
alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133
alloc_slab_page+0x6a/0x170 mm/slub.c:1870
allocate_slab mm/slub.c:2017 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2070
___slab_alloc+0xc8a/0x1330 mm/slub.c:3223
__slab_alloc mm/slub.c:3322 [inline]
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc_lru+0x18e/0x240 mm/slub.c:3509
alloc_inode_sb include/linux/fs.h:2937 [inline]
reiserfs_alloc_inode+0x2a/0xc0 fs/reiserfs/super.c:642
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x65/0x1d0 fs/inode.c:1006
new_inode+0x22/0x1d0 fs/inode.c:1032
reiserfs_create+0x182/0x6e0 fs/reiserfs/namei.c:641
lookup_open fs/namei.c:3477 [inline]
open_last_lookups fs/namei.c:3546 [inline]
path_openat+0x13fa/0x3290 fs/namei.c:3776
do_filp_open+0x234/0x490 fs/namei.c:3809
do_sys_openat2+0x13e/0x1d0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x247/0x290 fs/open.c:1463
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347
free_unref_page_list+0x5a0/0x840 mm/page_alloc.c:2533
release_pages+0x2117/0x2400 mm/swap.c:1042
tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
tlb_flush_mmu+0x34c/0x4e0 mm/mmu_gather.c:300
tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:392
unmap_region+0x300/0x350 mm/mmap.c:2341
do_vmi_align_munmap+0x1223/0x1860 mm/mmap.c:2657
do_vmi_munmap+0x24d/0x2d0 mm/mmap.c:2725
__vm_munmap+0x230/0x450 mm/mmap.c:3012
__do_sys_munmap mm/mmap.c:3029 [inline]
__se_sys_munmap mm/mmap.c:3026 [inline]
__x64_sys_munmap+0x69/0x80 mm/mmap.c:3026
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
ffff888082831e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888082831f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888082831f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888082832000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888082832080: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

---
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Next message: syzbot: "Re: [syzbot] [net?] KASAN: slab-out-of-bounds Read in dsa_user_changeupper"
Previous message: kernel test robot: "arch/x86/include/asm/processor.h:698:16: sparse: sparse: incorrect type in initializer (different address spaces)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]