KASAN: use-after-free Read in put_css_set_locked
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syzbot
Jul 14, 2021, 2:26:18 AM7/14/21
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1608e772300000
kernel config: https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757
dashboard link: https://syzkaller.appspot.com/bug?extid=d3b1ede13c1ef85bdd02
CC: [and...@kernel.org a...@kernel.org b...@vger.kernel.org cgr...@vger.kernel.org chri...@brauner.io dan...@iogearbox.net han...@cmpxchg.org john.fa...@gmail.com ka...@fb.com kps...@kernel.org linux-...@vger.kernel.org lize...@bytedance.com net...@vger.kernel.org songliu...@fb.com t...@kernel.org y...@fb.com]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d3b1ed...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
Read of size 8 at addr ffff88802a93c288 by task ksoftirqd/0/13
CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96
print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233
__kasan_report mm/kasan/report.c:419 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
__list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
__list_del_entry include/linux/list.h:132 [inline]
list_del include/linux/list.h:146 [inline]
put_css_set_locked+0x682/0xff0 kernel/cgroup/cgroup.c:962
put_css_set kernel/cgroup/cgroup-internal.h:193 [inline]
put_css_set kernel/cgroup/cgroup-internal.h:180 [inline]
cgroup_free+0x9d/0x1a0 kernel/cgroup/cgroup.c:6331
__put_task_struct+0x113/0x400 kernel/fork.c:738
put_task_struct include/linux/sched/task.h:113 [inline]
delayed_put_task_struct+0x1f6/0x340 kernel/exit.c:173
rcu_do_batch kernel/rcu/tree.c:2558 [inline]
rcu_core+0x7ab/0x1380 kernel/rcu/tree.c:2793
__do_softirq+0x29b/0x9bd kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:920 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Allocated by task 1:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
cgroup_create kernel/cgroup/cgroup.c:5280 [inline]
cgroup_mkdir+0x256/0x10f0 kernel/cgroup/cgroup.c:5427
kernfs_iop_mkdir+0x146/0x1d0 fs/kernfs/dir.c:1127
vfs_mkdir+0x538/0x770 fs/namei.c:3813
do_mkdirat+0x284/0x310 fs/namei.c:3838
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+0x44/0xae
Freed by task 3179:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:229 [inline]
slab_free_hook mm/slub.c:1639 [inline]
slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1664
slab_free mm/slub.c:3224 [inline]
kfree+0xeb/0x670 mm/slub.c:4268
css_free_rwork_fn+0x507/0x10e0 kernel/cgroup/cgroup.c:5067
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:348
insert_work+0x48/0x370 kernel/workqueue.c:1332
__queue_work+0x5c1/0xed0 kernel/workqueue.c:1498
rcu_work_rcufn+0x58/0x80 kernel/workqueue.c:1734
rcu_do_batch kernel/rcu/tree.c:2558 [inline]
rcu_core+0x7ab/0x1380 kernel/rcu/tree.c:2793
__do_softirq+0x29b/0x9bd kernel/softirq.c:558
Second to last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3038 [inline]
call_rcu+0xb1/0x750 kernel/rcu/tree.c:3113
queue_rcu_work+0x82/0xa0 kernel/workqueue.c:1754
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff88802a93c000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 648 bytes inside of
4096-byte region [ffff88802a93c000, ffff88802a93d000)
The buggy address belongs to the page:
page:ffffea0000aa4e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a938
head:ffffea0000aa4e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011042140
raw: 0000000000000000 0000000000040004 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 480669633886, free_ts 480451091594
prep_new_page mm/page_alloc.c:2445 [inline]
get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4178
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5386
alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272
alloc_slab_page mm/slub.c:1702 [inline]
allocate_slab+0x32b/0x4c0 mm/slub.c:1842
new_slab mm/slub.c:1905 [inline]
new_slab_objects mm/slub.c:2651 [inline]
___slab_alloc+0x4ba/0x820 mm/slub.c:2814
__slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2854
slab_alloc_node mm/slub.c:2936 [inline]
slab_alloc mm/slub.c:2978 [inline]
__kmalloc+0x312/0x330 mm/slub.c:4106
kmalloc include/linux/slab.h:596 [inline]
tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
security_inode_getattr+0xcf/0x140 security/security.c:1332
vfs_getattr fs/stat.c:139 [inline]
vfs_statx+0x164/0x390 fs/stat.c:207
vfs_fstatat fs/stat.c:225 [inline]
vfs_stat include/linux/fs.h:3379 [inline]
__do_sys_newstat+0x91/0x110 fs/stat.c:367
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+0x44/0xae
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1355 [inline]
free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1406
free_unref_page_prepare mm/page_alloc.c:3341 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3420
__vunmap+0x783/0xb70 mm/vmalloc.c:2569
__vfree+0x3c/0xd0 mm/vmalloc.c:2617
vfree+0x5a/0x90 mm/vmalloc.c:2648
kcov_put kernel/kcov.c:408 [inline]
kcov_put+0x26/0x40 kernel/kcov.c:404
kcov_close+0xc/0x10 kernel/kcov.c:510
__fput+0x288/0x920 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xbd4/0x2a50 kernel/exit.c:825
do_group_exit+0x125/0x310 kernel/exit.c:922
__do_sys_exit_group kernel/exit.c:933 [inline]
__se_sys_exit_group kernel/exit.c:931 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931
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+0x44/0xae
Memory state around the buggy address:
ffff88802a93c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a93c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802a93c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802a93c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a93c380: 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: 3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1608e772300000
kernel config: https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757
dashboard link: https://syzkaller.appspot.com/bug?extid=d3b1ede13c1ef85bdd02
CC: [and...@kernel.org a...@kernel.org b...@vger.kernel.org cgr...@vger.kernel.org chri...@brauner.io dan...@iogearbox.net han...@cmpxchg.org john.fa...@gmail.com ka...@fb.com kps...@kernel.org linux-...@vger.kernel.org lize...@bytedance.com net...@vger.kernel.org songliu...@fb.com t...@kernel.org y...@fb.com]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d3b1ed...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: use-after-free in __list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
Read of size 8 at addr ffff88802a93c288 by task ksoftirqd/0/13
CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:96
print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:233
__kasan_report mm/kasan/report.c:419 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
__list_del_entry_valid+0xe0/0xf0 lib/list_debug.c:51
__list_del_entry include/linux/list.h:132 [inline]
list_del include/linux/list.h:146 [inline]
put_css_set_locked+0x682/0xff0 kernel/cgroup/cgroup.c:962
put_css_set kernel/cgroup/cgroup-internal.h:193 [inline]
put_css_set kernel/cgroup/cgroup-internal.h:180 [inline]
cgroup_free+0x9d/0x1a0 kernel/cgroup/cgroup.c:6331
__put_task_struct+0x113/0x400 kernel/fork.c:738
put_task_struct include/linux/sched/task.h:113 [inline]
delayed_put_task_struct+0x1f6/0x340 kernel/exit.c:173
rcu_do_batch kernel/rcu/tree.c:2558 [inline]
rcu_core+0x7ab/0x1380 kernel/rcu/tree.c:2793
__do_softirq+0x29b/0x9bd kernel/softirq.c:558
run_ksoftirqd kernel/softirq.c:920 [inline]
run_ksoftirqd+0x2d/0x60 kernel/softirq.c:912
smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Allocated by task 1:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc mm/kasan/common.c:513 [inline]
____kasan_kmalloc mm/kasan/common.c:472 [inline]
__kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:522
kmalloc include/linux/slab.h:596 [inline]
kzalloc include/linux/slab.h:721 [inline]
cgroup_create kernel/cgroup/cgroup.c:5280 [inline]
cgroup_mkdir+0x256/0x10f0 kernel/cgroup/cgroup.c:5427
kernfs_iop_mkdir+0x146/0x1d0 fs/kernfs/dir.c:1127
vfs_mkdir+0x538/0x770 fs/namei.c:3813
do_mkdirat+0x284/0x310 fs/namei.c:3838
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+0x44/0xae
Freed by task 3179:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
____kasan_slab_free mm/kasan/common.c:366 [inline]
____kasan_slab_free mm/kasan/common.c:328 [inline]
__kasan_slab_free+0xfb/0x130 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:229 [inline]
slab_free_hook mm/slub.c:1639 [inline]
slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1664
slab_free mm/slub.c:3224 [inline]
kfree+0xeb/0x670 mm/slub.c:4268
css_free_rwork_fn+0x507/0x10e0 kernel/cgroup/cgroup.c:5067
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:348
insert_work+0x48/0x370 kernel/workqueue.c:1332
__queue_work+0x5c1/0xed0 kernel/workqueue.c:1498
rcu_work_rcufn+0x58/0x80 kernel/workqueue.c:1734
rcu_do_batch kernel/rcu/tree.c:2558 [inline]
rcu_core+0x7ab/0x1380 kernel/rcu/tree.c:2793
__do_softirq+0x29b/0x9bd kernel/softirq.c:558
Second to last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3038 [inline]
call_rcu+0xb1/0x750 kernel/rcu/tree.c:3113
queue_rcu_work+0x82/0xa0 kernel/workqueue.c:1754
process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
The buggy address belongs to the object at ffff88802a93c000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 648 bytes inside of
4096-byte region [ffff88802a93c000, ffff88802a93d000)
The buggy address belongs to the page:
page:ffffea0000aa4e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2a938
head:ffffea0000aa4e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888011042140
raw: 0000000000000000 0000000000040004 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 480669633886, free_ts 480451091594
prep_new_page mm/page_alloc.c:2445 [inline]
get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4178
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5386
alloc_pages+0x18c/0x2a0 mm/mempolicy.c:2272
alloc_slab_page mm/slub.c:1702 [inline]
allocate_slab+0x32b/0x4c0 mm/slub.c:1842
new_slab mm/slub.c:1905 [inline]
new_slab_objects mm/slub.c:2651 [inline]
___slab_alloc+0x4ba/0x820 mm/slub.c:2814
__slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2854
slab_alloc_node mm/slub.c:2936 [inline]
slab_alloc mm/slub.c:2978 [inline]
__kmalloc+0x312/0x330 mm/slub.c:4106
kmalloc include/linux/slab.h:596 [inline]
tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
security_inode_getattr+0xcf/0x140 security/security.c:1332
vfs_getattr fs/stat.c:139 [inline]
vfs_statx+0x164/0x390 fs/stat.c:207
vfs_fstatat fs/stat.c:225 [inline]
vfs_stat include/linux/fs.h:3379 [inline]
__do_sys_newstat+0x91/0x110 fs/stat.c:367
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+0x44/0xae
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1355 [inline]
free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1406
free_unref_page_prepare mm/page_alloc.c:3341 [inline]
free_unref_page+0x19/0x690 mm/page_alloc.c:3420
__vunmap+0x783/0xb70 mm/vmalloc.c:2569
__vfree+0x3c/0xd0 mm/vmalloc.c:2617
vfree+0x5a/0x90 mm/vmalloc.c:2648
kcov_put kernel/kcov.c:408 [inline]
kcov_put+0x26/0x40 kernel/kcov.c:404
kcov_close+0xc/0x10 kernel/kcov.c:510
__fput+0x288/0x920 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xbd4/0x2a50 kernel/exit.c:825
do_group_exit+0x125/0x310 kernel/exit.c:922
__do_sys_exit_group kernel/exit.c:933 [inline]
__se_sys_exit_group kernel/exit.c:931 [inline]
__x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931
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+0x44/0xae
Memory state around the buggy address:
ffff88802a93c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a93c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802a93c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88802a93c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88802a93c380: 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 14, 2021, 12:54:23 PM12/14/21
to syzkaller-upst...@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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