[syzbot] KASAN: use-after-free Read in __mark_inode_dirty
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syzbot
Nov 3, 2022, 11:33:42 AM11/3/22
to hiro...@mail.parknet.co.jp, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: b229b6ca5abb Merge tag 'perf-tools-fixes-for-v6.1-2022-10-..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=149134de880000
kernel config: https://syzkaller.appspot.com/x/.config?x=1d3548a4365ba17d
dashboard link: https://syzkaller.appspot.com/bug?extid=061052676f05d48a2355
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/24728b72a896/disk-b229b6ca.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/10a3c40c60e1/vmlinux-b229b6ca.xz
kernel image: https://storage.googleapis.com/syzbot-assets/69f963b02b7e/bzImage-b229b6ca.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+061052...@syzkaller.appspotmail.com
loop4: detected capacity change from 0 to 64
==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x48/0x100 lib/list_debug.c:27
Read of size 8 at addr ffff88808307e7e0 by task syz-executor.4/16125
CPU: 1 PID: 16125 Comm: syz-executor.4 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
print_address_description+0x74/0x340 mm/kasan/report.c:284
print_report+0x107/0x1f0 mm/kasan/report.c:395
kasan_report+0xcd/0x100 mm/kasan/report.c:495
__list_add_valid+0x48/0x100 lib/list_debug.c:27
__list_add include/linux/list.h:69 [inline]
list_add include/linux/list.h:88 [inline]
list_move include/linux/list.h:218 [inline]
inode_io_list_move_locked+0x18b/0x3c0 fs/fs-writeback.c:125
__mark_inode_dirty+0x525/0x600 fs/fs-writeback.c:2481
fat_set_state+0x264/0x350 fs/fat/inode.c:710
fat_fill_super+0x3768/0x4b00 fs/fat/inode.c:1882
mount_bdev+0x26c/0x3a0 fs/super.c:1400
legacy_get_tree+0xea/0x180 fs/fs_context.c:610
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x289/0xad0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f546968cada
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:00007f546a3cbf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000140 RCX: 00007f546968cada
RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 00007f546a3cbfe0
RBP: 00007f546a3cc020 R08: 00007f546a3cc020 R09: 00000000200000c0
R10: 0000000002010000 R11: 0000000000000202 R12: 00000000200000c0
R13: 0000000020000080 R14: 00007f546a3cbfe0 R15: 0000000020000240
</TASK>
Allocated by task 16113:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc_lru+0x180/0x2e0 mm/slub.c:3429
alloc_inode_sb include/linux/fs.h:3117 [inline]
fat_alloc_inode+0x25/0xc0 fs/fat/inode.c:750
alloc_inode fs/inode.c:259 [inline]
new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018
new_inode+0x25/0x1d0 fs/inode.c:1046
fat_build_inode+0x1e8/0x3e0 fs/fat/inode.c:603
vfat_create+0x1ef/0x2e0 fs/fat/namei_vfat.c:776
lookup_open fs/namei.c:3413 [inline]
open_last_lookups fs/namei.c:3481 [inline]
path_openat+0x12d0/0x2df0 fs/namei.c:3710
do_filp_open+0x264/0x4f0 fs/namei.c:3740
do_sys_openat2+0x124/0x4e0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_creat fs/open.c:1402 [inline]
__se_sys_creat fs/open.c:1396 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1396
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 16108:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x94/0x1d0 mm/slub.c:3683
rcu_do_batch kernel/rcu/tree.c:2250 [inline]
rcu_core+0x9c1/0x1690 kernel/rcu/tree.c:2510
__do_softirq+0x277/0x738 kernel/softirq.c:571
Last potentially related work creation:
kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2798
__dentry_kill+0x3b1/0x5b0 fs/dcache.c:607
dentry_kill+0xbb/0x290
dput+0x1f3/0x410 fs/dcache.c:913
__fput+0x5e4/0x880 fs/file_table.c:328
task_work_run+0x243/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Second to last potentially related work creation:
kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2798
fat_put_super+0x6a/0xb0 fs/fat/inode.c:739
generic_shutdown_super+0x130/0x310 fs/super.c:491
kill_block_super+0x79/0xd0 fs/super.c:1427
deactivate_locked_super+0xa7/0xf0 fs/super.c:331
cleanup_mnt+0x494/0x520 fs/namespace.c:1186
task_work_run+0x243/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88808307e500
which belongs to the cache fat_inode_cache of size 1488
The buggy address is located 736 bytes inside of
1488-byte region [ffff88808307e500, ffff88808307ead0)
The buggy address belongs to the physical page:
page:ffffea00020c1e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x83078
head:ffffea00020c1e00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88803d4a6301
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff88801c0fb000
raw: 0000000000000000 0000000080140014 00000001ffffffff ffff88803d4a6301
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 13967, tgid 13966 (syz-executor.2), ts 779342107397, free_ts 748305958885
prep_new_page mm/page_alloc.c:2538 [inline]
get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4287
__alloc_pages+0x259/0x560 mm/page_alloc.c:5554
alloc_slab_page+0x70/0xf0 mm/slub.c:1794
allocate_slab+0x5e/0x4b0 mm/slub.c:1939
new_slab mm/slub.c:1992 [inline]
___slab_alloc+0x782/0xe20 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc_lru+0x233/0x2e0 mm/slub.c:3429
alloc_inode_sb include/linux/fs.h:3117 [inline]
fat_alloc_inode+0x25/0xc0 fs/fat/inode.c:750
alloc_inode fs/inode.c:259 [inline]
new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018
new_inode+0x25/0x1d0 fs/inode.c:1046
fat_fill_super+0x3278/0x4b00 fs/fat/inode.c:1847
mount_bdev+0x26c/0x3a0 fs/super.c:1400
legacy_get_tree+0xea/0x180 fs/fs_context.c:610
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x289/0xad0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1458 [inline]
free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1508
free_unref_page_prepare mm/page_alloc.c:3386 [inline]
free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3482
qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x1cc/0x300 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
user_path_at_empty+0x2a/0x1a0 fs/namei.c:2875
do_readlinkat+0x10c/0x3d0 fs/stat.c:468
__do_sys_readlink fs/stat.c:501 [inline]
__se_sys_readlink fs/stat.c:498 [inline]
__x64_sys_readlink+0x7b/0x90 fs/stat.c:498
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88808307e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808307e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88808307e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88808307e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808307e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following issue on:
HEAD commit: b229b6ca5abb Merge tag 'perf-tools-fixes-for-v6.1-2022-10-..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=149134de880000
kernel config: https://syzkaller.appspot.com/x/.config?x=1d3548a4365ba17d
dashboard link: https://syzkaller.appspot.com/bug?extid=061052676f05d48a2355
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/24728b72a896/disk-b229b6ca.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/10a3c40c60e1/vmlinux-b229b6ca.xz
kernel image: https://storage.googleapis.com/syzbot-assets/69f963b02b7e/bzImage-b229b6ca.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+061052...@syzkaller.appspotmail.com
loop4: detected capacity change from 0 to 64
==================================================================
BUG: KASAN: use-after-free in __list_add_valid+0x48/0x100 lib/list_debug.c:27
Read of size 8 at addr ffff88808307e7e0 by task syz-executor.4/16125
CPU: 1 PID: 16125 Comm: syz-executor.4 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
print_address_description+0x74/0x340 mm/kasan/report.c:284
print_report+0x107/0x1f0 mm/kasan/report.c:395
kasan_report+0xcd/0x100 mm/kasan/report.c:495
__list_add_valid+0x48/0x100 lib/list_debug.c:27
__list_add include/linux/list.h:69 [inline]
list_add include/linux/list.h:88 [inline]
list_move include/linux/list.h:218 [inline]
inode_io_list_move_locked+0x18b/0x3c0 fs/fs-writeback.c:125
__mark_inode_dirty+0x525/0x600 fs/fs-writeback.c:2481
fat_set_state+0x264/0x350 fs/fat/inode.c:710
fat_fill_super+0x3768/0x4b00 fs/fat/inode.c:1882
mount_bdev+0x26c/0x3a0 fs/super.c:1400
legacy_get_tree+0xea/0x180 fs/fs_context.c:610
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x289/0xad0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f546968cada
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:00007f546a3cbf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000140 RCX: 00007f546968cada
RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 00007f546a3cbfe0
RBP: 00007f546a3cc020 R08: 00007f546a3cc020 R09: 00000000200000c0
R10: 0000000002010000 R11: 0000000000000202 R12: 00000000200000c0
R13: 0000000020000080 R14: 00007f546a3cbfe0 R15: 0000000020000240
</TASK>
Allocated by task 16113:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:325
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc_lru+0x180/0x2e0 mm/slub.c:3429
alloc_inode_sb include/linux/fs.h:3117 [inline]
fat_alloc_inode+0x25/0xc0 fs/fat/inode.c:750
alloc_inode fs/inode.c:259 [inline]
new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018
new_inode+0x25/0x1d0 fs/inode.c:1046
fat_build_inode+0x1e8/0x3e0 fs/fat/inode.c:603
vfat_create+0x1ef/0x2e0 fs/fat/namei_vfat.c:776
lookup_open fs/namei.c:3413 [inline]
open_last_lookups fs/namei.c:3481 [inline]
path_openat+0x12d0/0x2df0 fs/namei.c:3710
do_filp_open+0x264/0x4f0 fs/namei.c:3740
do_sys_openat2+0x124/0x4e0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_creat fs/open.c:1402 [inline]
__se_sys_creat fs/open.c:1396 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1396
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 16108:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x94/0x1d0 mm/slub.c:3683
rcu_do_batch kernel/rcu/tree.c:2250 [inline]
rcu_core+0x9c1/0x1690 kernel/rcu/tree.c:2510
__do_softirq+0x277/0x738 kernel/softirq.c:571
Last potentially related work creation:
kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2798
__dentry_kill+0x3b1/0x5b0 fs/dcache.c:607
dentry_kill+0xbb/0x290
dput+0x1f3/0x410 fs/dcache.c:913
__fput+0x5e4/0x880 fs/file_table.c:328
task_work_run+0x243/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Second to last potentially related work creation:
kasan_save_stack+0x2b/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:481
call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2798
fat_put_super+0x6a/0xb0 fs/fat/inode.c:739
generic_shutdown_super+0x130/0x310 fs/super.c:491
kill_block_super+0x79/0xd0 fs/super.c:1427
deactivate_locked_super+0xa7/0xf0 fs/super.c:331
cleanup_mnt+0x494/0x520 fs/namespace.c:1186
task_work_run+0x243/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88808307e500
which belongs to the cache fat_inode_cache of size 1488
The buggy address is located 736 bytes inside of
1488-byte region [ffff88808307e500, ffff88808307ead0)
The buggy address belongs to the physical page:
page:ffffea00020c1e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x83078
head:ffffea00020c1e00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88803d4a6301
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff88801c0fb000
raw: 0000000000000000 0000000080140014 00000001ffffffff ffff88803d4a6301
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 13967, tgid 13966 (syz-executor.2), ts 779342107397, free_ts 748305958885
prep_new_page mm/page_alloc.c:2538 [inline]
get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4287
__alloc_pages+0x259/0x560 mm/page_alloc.c:5554
alloc_slab_page+0x70/0xf0 mm/slub.c:1794
allocate_slab+0x5e/0x4b0 mm/slub.c:1939
new_slab mm/slub.c:1992 [inline]
___slab_alloc+0x782/0xe20 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc_lru+0x233/0x2e0 mm/slub.c:3429
alloc_inode_sb include/linux/fs.h:3117 [inline]
fat_alloc_inode+0x25/0xc0 fs/fat/inode.c:750
alloc_inode fs/inode.c:259 [inline]
new_inode_pseudo+0x61/0x1d0 fs/inode.c:1018
new_inode+0x25/0x1d0 fs/inode.c:1046
fat_fill_super+0x3278/0x4b00 fs/fat/inode.c:1847
mount_bdev+0x26c/0x3a0 fs/super.c:1400
legacy_get_tree+0xea/0x180 fs/fs_context.c:610
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x289/0xad0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1458 [inline]
free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1508
free_unref_page_prepare mm/page_alloc.c:3386 [inline]
free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3482
qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
slab_alloc mm/slub.c:3406 [inline]
__kmem_cache_alloc_lru mm/slub.c:3413 [inline]
kmem_cache_alloc+0x1cc/0x300 mm/slub.c:3422
getname_flags+0xb8/0x4e0 fs/namei.c:139
user_path_at_empty+0x2a/0x1a0 fs/namei.c:2875
do_readlinkat+0x10c/0x3d0 fs/stat.c:468
__do_sys_readlink fs/stat.c:501 [inline]
__se_sys_readlink fs/stat.c:498 [inline]
__x64_sys_readlink+0x7b/0x90 fs/stat.c:498
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff88808307e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808307e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88808307e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88808307e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808307e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
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syzbot
Feb 27, 2023, 4:24:30 AM2/27/23
to syzkall...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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