KASAN: use-after-free Read in lo_open
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syzbot
Dec 6, 2022, 9:04:43 AM12/6/22
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 69181d148aef ANDROID: arm64: mm: perform clean & invalidat..
git tree: android12-5.4
console output: https://syzkaller.appspot.com/x/log.txt?x=11bdd4db880000
kernel config: https://syzkaller.appspot.com/x/.config?x=c29947a309dbd4d3
dashboard link: https://syzkaller.appspot.com/bug?extid=e0260a7e30d28d995dd4
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/e0a8d9f3a153/disk-69181d14.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/832d654ee765/vmlinux-69181d14.xz
kernel image: https://storage.googleapis.com/syzbot-assets/69187241a01c/bzImage-69181d14.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e0260a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
BUG: KASAN: use-after-free in mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:973 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
Read of size 4 at addr ffff8881de013f38 by task syz-executor.4/21601
CPU: 1 PID: 21601 Comm: syz-executor.4 Not tainted 5.4.219-syzkaller-00094-g69181d148aef #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
__mutex_lock_common kernel/locking/mutex.c:973 [inline]
__mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
mutex_lock_killable+0xd9/0x120 kernel/locking/mutex.c:1348
lo_open+0x18/0xc0 drivers/block/loop.c:1899
__blkdev_get+0x913/0x1780 fs/block_dev.c:1644
blkdev_get+0x2d8/0x3a0 fs/block_dev.c:1714
do_dentry_open+0x946/0x10f0 fs/open.c:796
do_last fs/namei.c:3495 [inline]
path_openat+0x1603/0x3ea0 fs/namei.c:3614
do_filp_open+0x208/0x450 fs/namei.c:3644
do_sys_open+0x393/0x7e0 fs/open.c:1113
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Allocated by task 21595:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x131/0x1e0 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd0/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 16:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x178/0x240 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x49e/0xa10 kernel/rcu/tree.c:2167
rcu_core+0x4ba/0xca0 kernel/rcu/tree.c:2387
__do_softirq+0x23e/0x643 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881de013f00
which belongs to the cache task_struct of size 3904
The buggy address is located 56 bytes inside of
3904-byte region [ffff8881de013f00, ffff8881de014e40)
The buggy address belongs to the page:
page:ffffea0007780400 refcount:1 mapcount:0 mapping:ffff8881f5cec500 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5cec500
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x372/0x860 mm/page_alloc.c:4891
alloc_slab_page+0x39/0x3e0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x450 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x320/0x4a0 mm/slub.c:2667
__slab_alloc+0x5a/0x90 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x7fe/0x930 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4953 [inline]
__free_pages+0x8f/0x250 mm/page_alloc.c:4959
free_thread_stack kernel/fork.c:299 [inline]
release_task_stack kernel/fork.c:439 [inline]
put_task_stack+0x21a/0x270 kernel/fork.c:450
finish_task_switch+0x248/0x560 kernel/sched/core.c:3476
context_switch kernel/sched/core.c:3608 [inline]
__schedule+0x98e/0x1050 kernel/sched/core.c:4305
schedule+0x13b/0x1d0 kernel/sched/core.c:4373
freezable_schedule include/linux/freezer.h:172 [inline]
futex_wait_queue_me+0x1c6/0x320 kernel/futex.c:2743
futex_wait+0x33a/0x920 kernel/futex.c:2849
do_futex+0x13b9/0x19c0 kernel/futex.c:3888
__do_sys_futex kernel/futex.c:3949 [inline]
__se_sys_futex+0x34c/0x470 kernel/futex.c:3917
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881de013e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881de013e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881de013f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881de013f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881de014000: 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: 69181d148aef ANDROID: arm64: mm: perform clean & invalidat..
git tree: android12-5.4
console output: https://syzkaller.appspot.com/x/log.txt?x=11bdd4db880000
kernel config: https://syzkaller.appspot.com/x/.config?x=c29947a309dbd4d3
dashboard link: https://syzkaller.appspot.com/bug?extid=e0260a7e30d28d995dd4
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/e0a8d9f3a153/disk-69181d14.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/832d654ee765/vmlinux-69181d14.xz
kernel image: https://storage.googleapis.com/syzbot-assets/69187241a01c/bzImage-69181d14.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e0260a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
BUG: KASAN: use-after-free in mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:973 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
Read of size 4 at addr ffff8881de013f38 by task syz-executor.4/21601
CPU: 1 PID: 21601 Comm: syz-executor.4 Not tainted 5.4.219-syzkaller-00094-g69181d148aef #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
__mutex_lock_common kernel/locking/mutex.c:973 [inline]
__mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
mutex_lock_killable+0xd9/0x120 kernel/locking/mutex.c:1348
lo_open+0x18/0xc0 drivers/block/loop.c:1899
__blkdev_get+0x913/0x1780 fs/block_dev.c:1644
blkdev_get+0x2d8/0x3a0 fs/block_dev.c:1714
do_dentry_open+0x946/0x10f0 fs/open.c:796
do_last fs/namei.c:3495 [inline]
path_openat+0x1603/0x3ea0 fs/namei.c:3614
do_filp_open+0x208/0x450 fs/namei.c:3644
do_sys_open+0x393/0x7e0 fs/open.c:1113
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Allocated by task 21595:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x131/0x1e0 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd0/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 16:
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x178/0x240 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x49e/0xa10 kernel/rcu/tree.c:2167
rcu_core+0x4ba/0xca0 kernel/rcu/tree.c:2387
__do_softirq+0x23e/0x643 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881de013f00
which belongs to the cache task_struct of size 3904
The buggy address is located 56 bytes inside of
3904-byte region [ffff8881de013f00, ffff8881de014e40)
The buggy address belongs to the page:
page:ffffea0007780400 refcount:1 mapcount:0 mapping:ffff8881f5cec500 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5cec500
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL)
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x372/0x860 mm/page_alloc.c:4891
alloc_slab_page+0x39/0x3e0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x450 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x320/0x4a0 mm/slub.c:2667
__slab_alloc+0x5a/0x90 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1176 [inline]
__free_pages_ok+0x7fe/0x930 mm/page_alloc.c:1438
free_the_page mm/page_alloc.c:4953 [inline]
__free_pages+0x8f/0x250 mm/page_alloc.c:4959
free_thread_stack kernel/fork.c:299 [inline]
release_task_stack kernel/fork.c:439 [inline]
put_task_stack+0x21a/0x270 kernel/fork.c:450
finish_task_switch+0x248/0x560 kernel/sched/core.c:3476
context_switch kernel/sched/core.c:3608 [inline]
__schedule+0x98e/0x1050 kernel/sched/core.c:4305
schedule+0x13b/0x1d0 kernel/sched/core.c:4373
freezable_schedule include/linux/freezer.h:172 [inline]
futex_wait_queue_me+0x1c6/0x320 kernel/futex.c:2743
futex_wait+0x33a/0x920 kernel/futex.c:2849
do_futex+0x13b9/0x19c0 kernel/futex.c:3888
__do_sys_futex kernel/futex.c:3949 [inline]
__se_sys_futex+0x34c/0x470 kernel/futex.c:3917
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881de013e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8881de013e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881de013f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881de013f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881de014000: 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
Dec 8, 2022, 8:13:42 PM12/8/22
to syzkaller-a...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: d7e5d5321233 UPSTREAM: bpf: Ensure correct locking around ..
git tree: android12-5.4
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17c594c7880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7a4bf9153fd2/disk-d7e5d532.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/38bfe060d114/vmlinux-d7e5d532.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fc129d5a4306/bzImage-d7e5d532.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e0260a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
BUG: KASAN: use-after-free in mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:973 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
Read of size 4 at addr ffff8881ea928038 by task syz-executor.3/370
CPU: 1 PID: 370 Comm: syz-executor.3 Not tainted 5.4.219-syzkaller-00096-gd7e5d5321233 #0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 ffffea0007a67008 ffffea00078d2608 ffff8881f5ced400
raw: ffff8881ea92ee40 0000000000080001 00000001ffffffff 0000000000000000
Memory state around the buggy address:
ffff8881ea927f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8881ea927f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881ea928000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881ea928080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881ea928100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
HEAD commit: d7e5d5321233 UPSTREAM: bpf: Ensure correct locking around ..
git tree: android12-5.4
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17c594c7880000
kernel config: https://syzkaller.appspot.com/x/.config?x=c29947a309dbd4d3
dashboard link: https://syzkaller.appspot.com/bug?extid=e0260a7e30d28d995dd4
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14227d1d880000
dashboard link: https://syzkaller.appspot.com/bug?extid=e0260a7e30d28d995dd4
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7a4bf9153fd2/disk-d7e5d532.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/38bfe060d114/vmlinux-d7e5d532.xz
kernel image: https://storage.googleapis.com/syzbot-assets/fc129d5a4306/bzImage-d7e5d532.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e0260a...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
BUG: KASAN: use-after-free in mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:973 [inline]
BUG: KASAN: use-after-free in __mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
CPU: 1 PID: 370 Comm: syz-executor.3 Not tainted 5.4.219-syzkaller-00096-gd7e5d5321233 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
__mutex_lock_common kernel/locking/mutex.c:973 [inline]
__mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
mutex_lock_killable+0xd9/0x120 kernel/locking/mutex.c:1348
lo_open+0x18/0xc0 drivers/block/loop.c:1899
__blkdev_get+0x3f0/0x1780 fs/block_dev.c:1581
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d8/0x241 lib/dump_stack.c:118
print_address_description+0x8c/0x630 mm/kasan/report.c:384
__kasan_report+0xf6/0x130 mm/kasan/report.c:516
kasan_report+0x30/0x60 mm/kasan/common.c:653
mutex_can_spin_on_owner kernel/locking/mutex.c:617 [inline]
mutex_optimistic_spin kernel/locking/mutex.c:661 [inline]
__mutex_lock_common kernel/locking/mutex.c:973 [inline]
__mutex_lock+0xd45/0x10d0 kernel/locking/mutex.c:1114
mutex_lock_killable+0xd9/0x120 kernel/locking/mutex.c:1348
lo_open+0x18/0xc0 drivers/block/loop.c:1899
blkdev_get+0x2d8/0x3a0 fs/block_dev.c:1714
do_dentry_open+0x946/0x10f0 fs/open.c:796
do_last fs/namei.c:3495 [inline]
path_openat+0x1603/0x3ea0 fs/namei.c:3614
do_filp_open+0x208/0x450 fs/namei.c:3644
do_sys_open+0x393/0x7e0 fs/open.c:1113
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Allocated by task 353:
do_dentry_open+0x946/0x10f0 fs/open.c:796
do_last fs/namei.c:3495 [inline]
path_openat+0x1603/0x3ea0 fs/namei.c:3614
do_filp_open+0x208/0x450 fs/namei.c:3644
do_sys_open+0x393/0x7e0 fs/open.c:1113
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x131/0x1e0 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd0/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Freed by task 0:
set_track mm/kasan/common.c:78 [inline]
__kasan_kmalloc+0x131/0x1e0 mm/kasan/common.c:529
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc_node mm/slub.c:2829 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0xd0/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
save_stack mm/kasan/common.c:70 [inline]
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x178/0x240 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x49e/0xa10 kernel/rcu/tree.c:2167
rcu_core+0x4ba/0xca0 kernel/rcu/tree.c:2387
__do_softirq+0x23e/0x643 kernel/softirq.c:292
The buggy address belongs to the object at ffff8881ea928000
set_track mm/kasan/common.c:78 [inline]
kasan_set_free_info mm/kasan/common.c:345 [inline]
__kasan_slab_free+0x178/0x240 mm/kasan/common.c:487
slab_free_hook mm/slub.c:1455 [inline]
slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
slab_free mm/slub.c:3080 [inline]
kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
__rcu_reclaim kernel/rcu/rcu.h:222 [inline]
rcu_do_batch+0x49e/0xa10 kernel/rcu/tree.c:2167
rcu_core+0x4ba/0xca0 kernel/rcu/tree.c:2387
__do_softirq+0x23e/0x643 kernel/softirq.c:292
which belongs to the cache task_struct of size 3904
The buggy address is located 56 bytes inside of
3904-byte region [ffff8881ea928000, ffff8881ea928f40)
The buggy address is located 56 bytes inside of
The buggy address belongs to the page:
page:ffffea0007aa4a00 refcount:1 mapcount:0 mapping:ffff8881f5ced400 index:0xffff8881ea92ee40 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 ffffea0007a67008 ffffea00078d2608 ffff8881f5ced400
raw: ffff8881ea92ee40 0000000000080001 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC)
page_owner tracks the page as allocated
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x372/0x860 mm/page_alloc.c:4891
alloc_slab_page+0x39/0x3e0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x450 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x320/0x4a0 mm/slub.c:2667
__slab_alloc+0x5a/0x90 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page_owner free stack trace missing
post_alloc_hook mm/page_alloc.c:2165 [inline]
prep_new_page+0x194/0x380 mm/page_alloc.c:2171
get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
__alloc_pages_nodemask+0x372/0x860 mm/page_alloc.c:4891
alloc_slab_page+0x39/0x3e0 mm/slub.c:343
allocate_slab mm/slub.c:1683 [inline]
new_slab+0x97/0x450 mm/slub.c:1749
new_slab_objects mm/slub.c:2505 [inline]
___slab_alloc+0x320/0x4a0 mm/slub.c:2667
__slab_alloc+0x5a/0x90 mm/slub.c:2707
slab_alloc_node mm/slub.c:2792 [inline]
slab_alloc mm/slub.c:2837 [inline]
kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
kmem_cache_alloc_node include/linux/slab.h:427 [inline]
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x4f/0x5a0 kernel/fork.c:871
copy_process+0x56e/0x3230 kernel/fork.c:1878
_do_fork+0x196/0x8d0 kernel/fork.c:2391
__do_sys_clone kernel/fork.c:2549 [inline]
__se_sys_clone kernel/fork.c:2530 [inline]
__x64_sys_clone+0x287/0x2f0 kernel/fork.c:2530
do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Memory state around the buggy address:
ffff8881ea927f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881ea928000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881ea928080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881ea928100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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