[syzbot] KASAN: invalid-free in io_clean_op

From: syzbot
Date: Sun Sep 25 2022 - 13:29:49 EST

Next message: Martin K. Petersen: "Re: [PATCH] scsi: wd33c93: remove dead code related to the long-gone config WD33C93_PIO"
Previous message: Andrew Morton: "Re: [PATCH v3] rapidio/tsi721: Replace flush_scheduled_work() with flush_work()."
Next in thread: Pavel Begunkov: "Re: [syzbot] KASAN: invalid-free in io_clean_op"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Hello,

syzbot found the following issue on:

HEAD commit: aaa11ce2ffc8 Add linux-next specific files for 20220923
git tree: linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1608cadf080000
kernel config: https://syzkaller.appspot.com/x/.config?x=186d1ff305f10294
dashboard link: https://syzkaller.appspot.com/bug?extid=edfd15cd4246a3fc615a
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=144acdef080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10686540880000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+edfd15cd4246a3fc615a@xxxxxxxxxxxxxxxxxxxxxxxxx

==================================================================
BUG: KASAN: double-free in slab_free mm/slub.c:3599 [inline]
BUG: KASAN: double-free in __kmem_cache_free+0xab/0x3b0 mm/slub.c:3612
Free of addr ffff88801e642000 by task syz-executor374/3609

CPU: 0 PID: 3609 Comm: syz-executor374 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
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:284 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:395
kasan_report_invalid_free+0x97/0x1b0 mm/kasan/report.c:460
____kasan_slab_free+0x185/0x1c0 mm/kasan/common.c:225
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1669 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1695
slab_free mm/slub.c:3599 [inline]
__kmem_cache_free+0xab/0x3b0 mm/slub.c:3612
io_clean_op+0x581/0xb10 io_uring/io_uring.c:1699
io_free_batch_list+0x46f/0x7e0 io_uring/io_uring.c:1305
__io_submit_flush_completions+0x22b/0x2e0 io_uring/io_uring.c:1343
io_submit_flush_completions io_uring/io_uring.c:171 [inline]
ctx_flush_and_put+0xdf/0x1b0 io_uring/io_uring.c:1003
tctx_task_work+0x153/0x4a0 io_uring/io_uring.c:1087
task_work_run+0x16b/0x270 kernel/task_work.c:179
ptrace_notify+0x114/0x140 kernel/signal.c:2354
ptrace_report_syscall include/linux/ptrace.h:420 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]
syscall_exit_work kernel/entry/common.c:251 [inline]
syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:278
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:296
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f10ee5d8bb9
Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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:00007fff7120f998 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000040b2 RBX: 0000000000000003 RCX: 00007f10ee5d8bb9
RDX: 0000000000000000 RSI: 00000000000040b2 RDI: 0000000000000003
RBP: 00007f10ee59cd60 R08: 0000000020000000 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f10ee59cdf0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>

Allocated by task 3609:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
____kasan_kmalloc mm/kasan/common.c:330 [inline]
__kasan_kmalloc+0xa1/0xb0 mm/kasan/common.c:380
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:934 [inline]
__kmalloc+0x54/0xc0 mm/slab_common.c:947
kmalloc include/linux/slab.h:564 [inline]
io_alloc_async_data+0x9b/0x160 io_uring/io_uring.c:1590
io_msg_alloc_async io_uring/net.c:138 [inline]
io_msg_alloc_async_prep io_uring/net.c:147 [inline]
io_sendmsg_prep_async+0x19b/0x3c0 io_uring/net.c:221
io_req_prep_async+0x1d9/0x300 io_uring/io_uring.c:1613
io_submit_sqe io_uring/io_uring.c:2137 [inline]
io_submit_sqes+0xfcd/0x1df0 io_uring/io_uring.c:2276
__do_sys_io_uring_enter+0xac6/0x2410 io_uring/io_uring.c:3216
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+0x63/0xcd

Freed by task 3609:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1669 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1695
slab_free mm/slub.c:3599 [inline]
__kmem_cache_free+0xab/0x3b0 mm/slub.c:3612
io_send_zc_cleanup+0x133/0x180 io_uring/net.c:916
io_clean_op+0xf4/0xb10 io_uring/io_uring.c:1684
io_free_batch_list+0x46f/0x7e0 io_uring/io_uring.c:1305
__io_submit_flush_completions+0x22b/0x2e0 io_uring/io_uring.c:1343
io_submit_flush_completions io_uring/io_uring.c:171 [inline]
ctx_flush_and_put+0xdf/0x1b0 io_uring/io_uring.c:1003
tctx_task_work+0x153/0x4a0 io_uring/io_uring.c:1087
task_work_run+0x16b/0x270 kernel/task_work.c:179
ptrace_notify+0x114/0x140 kernel/signal.c:2354
ptrace_report_syscall include/linux/ptrace.h:420 [inline]
ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]
syscall_exit_work kernel/entry/common.c:251 [inline]
syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:278
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:296
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88801e642000
which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes inside of
512-byte region [ffff88801e642000, ffff88801e642200)

The buggy address belongs to the physical page:
page:ffffea0000799000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e640
head:ffffea0000799000 order:2 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffff888011841c80 dead000000100010 0000000000000000
raw: 0000000000000000 dead000000000001 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 7630490778, free_ts 0
prep_new_page mm/page_alloc.c:2538 [inline]
get_page_from_freelist+0x1092/0x2d20 mm/page_alloc.c:4287
__alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5546
alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2113
alloc_pages+0x22f/0x270 mm/mempolicy.c:2275
alloc_slab_page mm/slub.c:1739 [inline]
allocate_slab+0x213/0x300 mm/slub.c:1884
new_slab mm/slub.c:1937 [inline]
___slab_alloc+0xac1/0x1430 mm/slub.c:3119
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3217
slab_alloc_node mm/slub.c:3302 [inline]
__kmem_cache_alloc_node+0x18a/0x3d0 mm/slub.c:3375
kmalloc_node_trace+0x1d/0x60 mm/slab_common.c:1027
kmalloc_node include/linux/slab.h:581 [inline]
kzalloc_node include/linux/slab.h:706 [inline]
iolatency_pd_alloc+0xc1/0x1c0 block/blk-iolatency.c:961
blkcg_activate_policy block/blk-cgroup.c:1425 [inline]
blkcg_activate_policy+0x1e4/0xba0 block/blk-cgroup.c:1398
blk_iolatency_init+0x290/0x5e0 block/blk-iolatency.c:777
blkcg_init_queue+0x17d/0x620 block/blk-cgroup.c:1302
__alloc_disk_node+0x29d/0x650 block/genhd.c:1366
__blk_alloc_disk+0x35/0x90 block/genhd.c:1405
brd_alloc.part.0+0x281/0x760 drivers/block/brd.c:391
page_owner free stack trace missing

Memory state around the buggy address:
ffff88801e641f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88801e641f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801e642000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801e642080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801e642100: 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 syzkaller@xxxxxxxxxxxxxxxx.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

Next message: Martin K. Petersen: "Re: [PATCH] scsi: wd33c93: remove dead code related to the long-gone config WD33C93_PIO"
Previous message: Andrew Morton: "Re: [PATCH v3] rapidio/tsi721: Replace flush_scheduled_work() with flush_work()."
Next in thread: Pavel Begunkov: "Re: [syzbot] KASAN: invalid-free in io_clean_op"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]