From: syzbot <syzbot+5d34cc6474499a5ff516@syzkaller.appspotmail.com>
To: hdanton@sina.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [ntfs3?] KASAN: slab-use-after-free Read in chrdev_open
Date: Fri, 26 Apr 2024 23:52:04 -0700 [thread overview]
Message-ID: <0000000000003cfb0206170e7568@google.com> (raw)
In-Reply-To: <20240427062943.3685-1-hdanton@sina.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-use-after-free Read in chrdev_open
loop0: detected capacity change from 0 to 4096
==================================================================
BUG: KASAN: slab-use-after-free in __list_add_valid_or_report+0x4c/0xf0 lib/list_debug.c:29
Read of size 8 at addr ffff88806dd4e688 by task syz-executor.0/5508
CPU: 0 PID: 5508 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00053-ge33c4963bf53-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
__list_add_valid_or_report+0x4c/0xf0 lib/list_debug.c:29
__list_add_valid include/linux/list.h:88 [inline]
__list_add include/linux/list.h:150 [inline]
list_add include/linux/list.h:169 [inline]
chrdev_open+0x2a9/0x630 fs/char_dev.c:396
do_dentry_open+0x90f/0x15b0 fs/open.c:956
do_open fs/namei.c:3642 [inline]
path_openat+0x2860/0x3240 fs/namei.c:3799
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1408
do_sys_open fs/open.c:1423 [inline]
__do_sys_openat fs/open.c:1439 [inline]
__se_sys_openat fs/open.c:1434 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1434
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8548c7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f85499fd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8548dabf80 RCX: 00007f8548c7dea9
RDX: 0000000000000000 RSI: 0000000020002140 RDI: ffffffffffffff9c
RBP: 00007f8548cca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8548dabf80 R15: 00007fff70180958
</TASK>
Allocated by task 5494:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc_lru+0x178/0x350 mm/slub.c:3864
alloc_inode_sb include/linux/fs.h:3091 [inline]
ntfs_alloc_inode+0x28/0x80 fs/ntfs3/super.c:557
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007
new_inode+0x22/0x1d0 fs/inode.c:1033
ntfs_new_inode+0x45/0x100 fs/ntfs3/fsntfs.c:1688
ntfs_create_inode+0x687/0x3c30 fs/ntfs3/inode.c:1333
ntfs_mknod+0x41/0x60 fs/ntfs3/namei.c:128
vfs_mknod+0x36d/0x3b0 fs/namei.c:4001
do_mknodat+0x3ec/0x5b0
__do_sys_mknodat fs/namei.c:4079 [inline]
__se_sys_mknodat fs/namei.c:4076 [inline]
__x64_sys_mknodat+0xa9/0xc0 fs/namei.c:4076
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5504:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kmem_cache_free+0x10b/0x2c0 mm/slub.c:4344
rcu_do_batch kernel/rcu/tree.c:2196 [inline]
rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2471
__do_softirq+0x2c6/0x980 kernel/softirq.c:554
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:2734 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:2838
__dentry_kill+0x20d/0x630 fs/dcache.c:603
shrink_kill+0xa9/0x2c0 fs/dcache.c:1048
shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1075
shrink_dcache_parent+0xcb/0x3b0
do_one_tree+0x23/0xe0 fs/dcache.c:1538
shrink_dcache_for_umount+0x7d/0x130 fs/dcache.c:1555
generic_shutdown_super+0x6a/0x2d0 fs/super.c:619
kill_block_super+0x44/0x90 fs/super.c:1675
ntfs3_kill_sb+0x44/0x1b0 fs/ntfs3/super.c:1785
deactivate_locked_super+0xc4/0x130 fs/super.c:472
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
task_work_run+0x24f/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88806dd4dfe0
which belongs to the cache ntfs_inode_cache of size 1760
The buggy address is located 1704 bytes inside of
freed 1760-byte region [ffff88806dd4dfe0, ffff88806dd4e6c0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6dd48
head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888029458b01
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff888019733b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080110011 00000001ffffffff ffff888029458b01
head: 00fff80000000840 ffff888019733b40 dead000000000122 0000000000000000
head: 0000000000000000 0000000080110011 00000001ffffffff ffff888029458b01
head: 00fff80000000003 ffffea0001b75201 dead000000000122 00000000ffffffff
head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5493, tgid 401221234 (syz-executor.0), ts 5494, free_ts 64399791889
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
__alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2175
allocate_slab mm/slub.c:2338 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2391
___slab_alloc+0xc73/0x1260 mm/slub.c:3525
__slab_alloc mm/slub.c:3610 [inline]
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
kmem_cache_alloc_lru+0x253/0x350 mm/slub.c:3864
alloc_inode_sb include/linux/fs.h:3091 [inline]
ntfs_alloc_inode+0x28/0x80 fs/ntfs3/super.c:557
alloc_inode fs/inode.c:261 [inline]
iget5_locked+0xa4/0x280 fs/inode.c:1235
ntfs_iget5+0xc7/0x3b70 fs/ntfs3/inode.c:525
ntfs_fill_super+0x25dc/0x49c0 fs/ntfs3/super.c:1206
get_tree_bdev+0x3f7/0x570 fs/super.c:1614
vfs_get_tree+0x90/0x2a0 fs/super.c:1779
do_new_mount+0x2be/0xb40 fs/namespace.c:3352
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
page last free pid 5059 tgid 5059 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
free_unref_folios+0x185/0xb30 mm/page_alloc.c:2536
folios_put_refs+0x8eb/0xa10 mm/swap.c:1034
free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:329
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
zap_pte_range mm/memory.c:1683 [inline]
zap_pmd_range mm/memory.c:1722 [inline]
zap_pud_range mm/memory.c:1751 [inline]
zap_p4d_range mm/memory.c:1772 [inline]
unmap_page_range+0x3e36/0x4820 mm/memory.c:1793
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1883
exit_mmap+0x2cb/0xd60 mm/mmap.c:3267
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
get_signal+0x16a1/0x1740 kernel/signal.c:2911
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
Memory state around the buggy address:
ffff88806dd4e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88806dd4e600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88806dd4e680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
^
ffff88806dd4e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
ffff88806dd4e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Tested on:
commit: e33c4963 Merge tag 'nfsd-6.9-5' of git://git.kernel.or..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=109b0028980000
kernel config: https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc
dashboard link: https://syzkaller.appspot.com/bug?extid=5d34cc6474499a5ff516
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=12632380980000
next prev parent reply other threads:[~2024-04-27 6:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-26 12:00 [syzbot] [ntfs3?] KASAN: slab-use-after-free Read in chrdev_open syzbot
2024-04-26 20:57 ` syzbot
2024-04-27 2:06 ` Hillf Danton
2024-04-27 2:58 ` syzbot
2024-04-27 6:29 ` Hillf Danton
2024-04-27 6:52 ` syzbot [this message]
2024-04-27 9:18 ` Hillf Danton
2024-04-27 9:45 ` syzbot
2024-04-27 10:44 ` Hillf Danton
2024-04-27 10:58 ` syzbot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0000000000003cfb0206170e7568@google.com \
--to=syzbot+5d34cc6474499a5ff516@syzkaller.appspotmail.com \
--cc=hdanton@sina.com \
--cc=linux-kernel@vger.kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.