[syzbot] KASAN: invalid-free in free_prealloced_shrinker
syzbot
syzbot+8b481578352d4637f510 at syzkaller.appspotmail.com
Wed Jul 20 07:52:24 UTC 2022
Hello,
syzbot found the following issue on:
HEAD commit: cb71b93c2dc3 Add linux-next specific files for 20220628
git tree: linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13621152080000
kernel config: https://syzkaller.appspot.com/x/.config?x=badbc1adb2d582eb
dashboard link: https://syzkaller.appspot.com/bug?extid=8b481578352d4637f510
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150c25fc080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13089562080000
The issue was bisected to:
commit bec0918551a79c3c6b63a493a80e35e8b402804f
Author: Roman Gushchin <roman.gushchin at linux.dev>
Date: Wed Jun 1 03:22:24 2022 +0000
mm: shrinkers: provide shrinkers with names
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17451fd0080000
final oops: https://syzkaller.appspot.com/x/report.txt?x=14c51fd0080000
console output: https://syzkaller.appspot.com/x/log.txt?x=10c51fd0080000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8b481578352d4637f510 at syzkaller.appspotmail.com
Fixes: bec0918551a7 ("mm: shrinkers: provide shrinkers with names")
==================================================================
BUG: KASAN: double-free in slab_free mm/slub.c:3534 [inline]
BUG: KASAN: double-free in kfree+0xe2/0x4d0 mm/slub.c:4562
CPU: 0 PID: 3647 Comm: syz-executor232 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
kasan_report_invalid_free+0x8f/0x1a0 mm/kasan/report.c:462
____kasan_slab_free+0x18b/0x1c0 mm/kasan/common.c:355
kasan_slab_free include/linux/kasan.h:200 [inline]
slab_free_hook mm/slub.c:1754 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780
slab_free mm/slub.c:3534 [inline]
kfree+0xe2/0x4d0 mm/slub.c:4562
kfree_const+0x51/0x60 mm/util.c:41
free_prealloced_shrinker+0x32/0x160 mm/vmscan.c:658
destroy_unused_super.part.0+0x106/0x170 fs/super.c:185
destroy_unused_super fs/super.c:278 [inline]
alloc_super+0x8bd/0xaa0 fs/super.c:277
sget_fc+0x13e/0x7c0 fs/super.c:530
vfs_get_super fs/super.c:1134 [inline]
get_tree_nodev+0x24/0x1d0 fs/super.c:1169
vfs_get_tree+0x89/0x2f0 fs/super.c:1501
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f84280f4ef9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 15 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc55338338 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f84280f4ef9
RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 00007ffc55338360 R08: 0000000000000000 R09: 00007ffc55338370
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007ffc55338380 R14: 00007ffc553383c0 R15: 0000000000000006
</TASK>
Allocated by task 143:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:436 [inline]
____kasan_kmalloc mm/kasan/common.c:515 [inline]
____kasan_kmalloc mm/kasan/common.c:474 [inline]
__kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524
kmalloc include/linux/slab.h:605 [inline]
kzalloc include/linux/slab.h:733 [inline]
rh_call_control drivers/usb/core/hcd.c:514 [inline]
rh_urb_enqueue drivers/usb/core/hcd.c:848 [inline]
usb_hcd_submit_urb+0x661/0x2220 drivers/usb/core/hcd.c:1551
usb_submit_urb+0x86d/0x1880 drivers/usb/core/urb.c:594
usb_start_wait_urb+0x101/0x4b0 drivers/usb/core/message.c:58
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153
get_port_status drivers/usb/core/hub.c:580 [inline]
hub_ext_port_status+0x112/0x450 drivers/usb/core/hub.c:597
usb_hub_port_status drivers/usb/core/hub.c:619 [inline]
hub_activate+0xa5c/0x1c90 drivers/usb/core/hub.c:1129
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Freed by task 3647:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
kasan_set_track+0x21/0x30 mm/kasan/common.c:45
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:328
kasan_slab_free include/linux/kasan.h:200 [inline]
slab_free_hook mm/slub.c:1754 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780
slab_free mm/slub.c:3534 [inline]
kfree+0xe2/0x4d0 mm/slub.c:4562
kfree_const+0x51/0x60 mm/util.c:41
prealloc_shrinker+0x179/0x1b0 mm/vmscan.c:644
alloc_super+0x831/0xaa0 fs/super.c:268
sget_fc+0x13e/0x7c0 fs/super.c:530
vfs_get_super fs/super.c:1134 [inline]
get_tree_nodev+0x24/0x1d0 fs/super.c:1169
vfs_get_tree+0x89/0x2f0 fs/super.c:1501
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
The buggy address belongs to the object at ffff888147889b20
which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes inside of
16-byte region [ffff888147889b20, ffff888147889b30)
The buggy address belongs to the physical page:
page:ffffea00051e2240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147889
flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000000200 ffffea00051e2ac0 dead000000000002 ffff8880118413c0
raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 8392902276, free_ts 0
prep_new_page mm/page_alloc.c:2535 [inline]
get_page_from_freelist+0x210d/0x3a30 mm/page_alloc.c:4282
__alloc_pages+0x1c7/0x510 mm/page_alloc.c:5506
alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2113
alloc_pages+0x2b1/0x310 mm/mempolicy.c:2275
alloc_slab_page mm/slub.c:1824 [inline]
allocate_slab+0x27e/0x3d0 mm/slub.c:1969
new_slab mm/slub.c:2029 [inline]
___slab_alloc+0x89d/0xef0 mm/slub.c:3031
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118
slab_alloc_node mm/slub.c:3209 [inline]
slab_alloc mm/slub.c:3251 [inline]
__kmalloc_track_caller+0x382/0x430 mm/slub.c:4924
kstrdup+0x36/0x70 mm/util.c:61
kstrdup_const+0x53/0x80 mm/util.c:84
__kernfs_new_node+0x9d/0x8b0 fs/kernfs/dir.c:589
kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:655
kernfs_create_link+0xcb/0x230 fs/kernfs/symlink.c:39
sysfs_do_create_link_sd+0x90/0x140 fs/sysfs/symlink.c:44
sysfs_do_create_link fs/sysfs/symlink.c:80 [inline]
sysfs_create_link+0x5f/0xc0 fs/sysfs/symlink.c:92
driver_sysfs_add+0xf7/0x350 drivers/base/dd.c:412
page_owner free stack trace missing
Memory state around the buggy address:
ffff888147889a00: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc
ffff888147889a80: fb fb fc fc fb fb fc fc fb fb fc fc fb fb fc fc
>ffff888147889b00: fb fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
^
ffff888147889b80: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
ffff888147889c00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
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For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
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