[syzbot] [bluetooth?] KASAN: slab-use-after-free Read in hci_conn_hash_flush
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syzbot
Mar 4, 2023, 1:26:51 AM3/4/23
to da...@davemloft.net, edum...@google.com, johan....@gmail.com, ku...@kernel.org, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, luiz....@gmail.com, mar...@holtmann.org, net...@vger.kernel.org, pab...@redhat.com, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 1acf39ef8f14 Add linux-next specific files for 20230303
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=115b8e38c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e4da7f0aef5d2eb8
dashboard link: https://syzkaller.appspot.com/bug?extid=8bb72f86fc823817bc5d
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, 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/721c5c42a073/disk-1acf39ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c5ca5353e61a/vmlinux-1acf39ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/29f477775fe9/bzImage-1acf39ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8bb72f...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_hash_flush+0x23c/0x260 net/bluetooth/hci_conn.c:2437
Read of size 8 at addr ffff88808d354000 by task syz-executor.1/6401
CPU: 1 PID: 6401 Comm: syz-executor.1 Not tainted 6.2.0-next-20230303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
print_report mm/kasan/report.c:430 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:536
hci_conn_hash_flush+0x23c/0x260 net/bluetooth/hci_conn.c:2437
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4889
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2702
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:568
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xb42/0x2b60 kernel/exit.c:869
do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
__do_sys_exit_group kernel/exit.c:1030 [inline]
__se_sys_exit_group kernel/exit.c:1028 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1028
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fea0308c0f9
Code: Unable to access opcode bytes at 0x7fea0308c0cf.
RSP: 002b:00007fff14dbd268 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fff14dbd410 RCX: 00007fea0308c0f9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000025 R09: 00007fff14dbd410
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fea030e7aba
R13: 000000000000001c R14: 000000000000000f R15: 00007fff14dbd450
</TASK>
Allocated by task 6988:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:580 [inline]
kzalloc include/linux/slab.h:720 [inline]
hci_conn_add+0xb8/0x15c0 net/bluetooth/hci_conn.c:962
hci_connect_sco+0x42c/0xac0 net/bluetooth/hci_conn.c:1607
sco_connect net/bluetooth/sco.c:255 [inline]
sco_sock_connect+0x350/0xa60 net/bluetooth/sco.c:598
__sys_connect_file+0x153/0x1a0 net/socket.c:2004
__sys_connect+0x165/0x1a0 net/socket.c:2021
__do_sys_connect net/socket.c:2031 [inline]
__se_sys_connect net/socket.c:2028 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:2028
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 6401:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____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:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
device_release+0xa3/0x240 drivers/base/core.c:2436
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:729
put_device+0x1f/0x30 drivers/base/core.c:3697
hci_conn_del+0x212/0xa70 net/bluetooth/hci_conn.c:1112
hci_conn_del+0x7df/0xa70 net/bluetooth/hci_conn.c:1071
hci_conn_hash_flush+0x19b/0x260 net/bluetooth/hci_conn.c:2441
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4889
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2702
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:568
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xb42/0x2b60 kernel/exit.c:869
do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
__do_sys_exit_group kernel/exit.c:1030 [inline]
__se_sys_exit_group kernel/exit.c:1028 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1028
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
insert_work+0x48/0x350 kernel/workqueue.c:1361
__queue_work+0x5fd/0x1170 kernel/workqueue.c:1524
__queue_delayed_work+0x1c8/0x270 kernel/workqueue.c:1672
queue_delayed_work_on+0x109/0x120 kernel/workqueue.c:1708
queue_delayed_work include/linux/workqueue.h:519 [inline]
hci_conn_drop include/net/bluetooth/hci_core.h:1417 [inline]
hci_conn_drop include/net/bluetooth/hci_core.h:1387 [inline]
sco_chan_del+0x1f8/0x4f0 net/bluetooth/sco.c:169
__sco_sock_close+0x178/0x740 net/bluetooth/sco.c:431
sco_sock_close net/bluetooth/sco.c:446 [inline]
sco_sock_release+0x81/0x360 net/bluetooth/sco.c:1254
__sock_release+0xcd/0x290 net/socket.c:651
sock_close+0x1c/0x20 net/socket.c:1393
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
get_signal+0x1c7/0x25b0 kernel/signal.c:2635
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88808d354000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff88808d354000, ffff88808d355000)
The buggy address belongs to the physical page:
page:ffffea000234d400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8d350
head:ffffea000234d400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012442140 dead000000000100 dead000000000122
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 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5125, tgid 5125 (syz-executor.2), ts 331563645285, free_ts 0
prep_new_page mm/page_alloc.c:2492 [inline]
get_page_from_freelist+0xf75/0x2ad0 mm/page_alloc.c:4256
__alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5522
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x28e/0x380 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3193
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
__slab_alloc_node mm/slub.c:3345 [inline]
slab_alloc_node mm/slub.c:3442 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc+0x4a/0xd0 mm/slab_common.c:980
kmalloc include/linux/slab.h:584 [inline]
tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x22d/0x430 security/tomoyo/file.c:822
security_inode_getattr+0xd3/0x140 security/security.c:1375
vfs_getattr fs/stat.c:167 [inline]
vfs_fstat+0x47/0xb0 fs/stat.c:192
__do_sys_newfstat+0x7a/0xf0 fs/stat.c:456
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page_owner free stack trace missing
Memory state around the buggy address:
ffff88808d353f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88808d353f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808d354000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88808d354080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808d354100: 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: 1acf39ef8f14 Add linux-next specific files for 20230303
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=115b8e38c80000
kernel config: https://syzkaller.appspot.com/x/.config?x=e4da7f0aef5d2eb8
dashboard link: https://syzkaller.appspot.com/bug?extid=8bb72f86fc823817bc5d
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, 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/721c5c42a073/disk-1acf39ef.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c5ca5353e61a/vmlinux-1acf39ef.xz
kernel image: https://storage.googleapis.com/syzbot-assets/29f477775fe9/bzImage-1acf39ef.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8bb72f...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_hash_flush+0x23c/0x260 net/bluetooth/hci_conn.c:2437
Read of size 8 at addr ffff88808d354000 by task syz-executor.1/6401
CPU: 1 PID: 6401 Comm: syz-executor.1 Not tainted 6.2.0-next-20230303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
print_report mm/kasan/report.c:430 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:536
hci_conn_hash_flush+0x23c/0x260 net/bluetooth/hci_conn.c:2437
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4889
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2702
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:568
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xb42/0x2b60 kernel/exit.c:869
do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
__do_sys_exit_group kernel/exit.c:1030 [inline]
__se_sys_exit_group kernel/exit.c:1028 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1028
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fea0308c0f9
Code: Unable to access opcode bytes at 0x7fea0308c0cf.
RSP: 002b:00007fff14dbd268 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fff14dbd410 RCX: 00007fea0308c0f9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000043
RBP: 0000000000000000 R08: 0000000000000025 R09: 00007fff14dbd410
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fea030e7aba
R13: 000000000000001c R14: 000000000000000f R15: 00007fff14dbd450
</TASK>
Allocated by task 6988:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:580 [inline]
kzalloc include/linux/slab.h:720 [inline]
hci_conn_add+0xb8/0x15c0 net/bluetooth/hci_conn.c:962
hci_connect_sco+0x42c/0xac0 net/bluetooth/hci_conn.c:1607
sco_connect net/bluetooth/sco.c:255 [inline]
sco_sock_connect+0x350/0xa60 net/bluetooth/sco.c:598
__sys_connect_file+0x153/0x1a0 net/socket.c:2004
__sys_connect+0x165/0x1a0 net/socket.c:2021
__do_sys_connect net/socket.c:2031 [inline]
__se_sys_connect net/socket.c:2028 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:2028
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 6401:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____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:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800
device_release+0xa3/0x240 drivers/base/core.c:2436
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:729
put_device+0x1f/0x30 drivers/base/core.c:3697
hci_conn_del+0x212/0xa70 net/bluetooth/hci_conn.c:1112
hci_conn_del+0x7df/0xa70 net/bluetooth/hci_conn.c:1071
hci_conn_hash_flush+0x19b/0x260 net/bluetooth/hci_conn.c:2441
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4889
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2702
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:568
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xb42/0x2b60 kernel/exit.c:869
do_group_exit+0xd4/0x2a0 kernel/exit.c:1019
__do_sys_exit_group kernel/exit.c:1030 [inline]
__se_sys_exit_group kernel/exit.c:1028 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1028
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Last potentially related work creation:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
insert_work+0x48/0x350 kernel/workqueue.c:1361
__queue_work+0x5fd/0x1170 kernel/workqueue.c:1524
__queue_delayed_work+0x1c8/0x270 kernel/workqueue.c:1672
queue_delayed_work_on+0x109/0x120 kernel/workqueue.c:1708
queue_delayed_work include/linux/workqueue.h:519 [inline]
hci_conn_drop include/net/bluetooth/hci_core.h:1417 [inline]
hci_conn_drop include/net/bluetooth/hci_core.h:1387 [inline]
sco_chan_del+0x1f8/0x4f0 net/bluetooth/sco.c:169
__sco_sock_close+0x178/0x740 net/bluetooth/sco.c:431
sco_sock_close net/bluetooth/sco.c:446 [inline]
sco_sock_release+0x81/0x360 net/bluetooth/sco.c:1254
__sock_release+0xcd/0x290 net/socket.c:651
sock_close+0x1c/0x20 net/socket.c:1393
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
get_signal+0x1c7/0x25b0 kernel/signal.c:2635
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88808d354000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff88808d354000, ffff88808d355000)
The buggy address belongs to the physical page:
page:ffffea000234d400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8d350
head:ffffea000234d400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012442140 dead000000000100 dead000000000122
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 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5125, tgid 5125 (syz-executor.2), ts 331563645285, free_ts 0
prep_new_page mm/page_alloc.c:2492 [inline]
get_page_from_freelist+0xf75/0x2ad0 mm/page_alloc.c:4256
__alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5522
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x28e/0x380 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3193
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292
__slab_alloc_node mm/slub.c:3345 [inline]
slab_alloc_node mm/slub.c:3442 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3491
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc+0x4a/0xd0 mm/slab_common.c:980
kmalloc include/linux/slab.h:584 [inline]
tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_path_perm+0x22d/0x430 security/tomoyo/file.c:822
security_inode_getattr+0xd3/0x140 security/security.c:1375
vfs_getattr fs/stat.c:167 [inline]
vfs_fstat+0x47/0xb0 fs/stat.c:192
__do_sys_newfstat+0x7a/0xf0 fs/stat.c:456
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page_owner free stack trace missing
Memory state around the buggy address:
ffff88808d353f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88808d353f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808d354000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88808d354080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88808d354100: 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
May 1, 2023, 9:59:40 AM5/1/23
to da...@davemloft.net, edum...@google.com, johan....@gmail.com, ku...@kernel.org, linux-b...@vger.kernel.org, linux-...@vger.kernel.org, lrh...@pku.edu.cn, luiz....@gmail.com, mar...@holtmann.org, net...@vger.kernel.org, pab...@redhat.com, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 58390c8ce1bd Merge tag 'iommu-updates-v6.4' of git://git.k..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1502fd68280000
kernel config: https://syzkaller.appspot.com/x/.config?x=d56ffc213bf6bf4a
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ace9d8280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/64e93dba0330/disk-58390c8c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2b7f3c1154f1/vmlinux-58390c8c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4ad00371a063/bzImage-58390c8c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8bb72f...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in hci_conn_hash_flush+0x244/0x270 net/bluetooth/hci_conn.c:2470
Read of size 8 at addr ffff88807df46000 by task syz-executor183/4997
CPU: 0 PID: 4997 Comm: syz-executor183 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
print_report mm/kasan/report.c:462 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:572
hci_conn_hash_flush+0x244/0x270 net/bluetooth/hci_conn.c:2470
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4941
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2703
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:669
do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
__do_sys_exit_group kernel/exit.c:1032 [inline]
__se_sys_exit_group kernel/exit.c:1030 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030
Code: Unable to access opcode bytes at 0x7f5c483ecbbf.
RSP: 002b:00007ffcf6d71ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f5c484773b0 RCX: 00007f5c483ecbe9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffb8 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c484773b0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
</TASK>
Allocated by task 5002:
kzalloc include/linux/slab.h:680 [inline]
hci_conn_add+0xb8/0x16b0 net/bluetooth/hci_conn.c:986
hci_connect_sco+0x3c7/0x1050 net/bluetooth/hci_conn.c:1663
sco_connect net/bluetooth/sco.c:264 [inline]
sco_sock_connect+0x2d7/0xae0 net/bluetooth/sco.c:610
__sys_connect_file+0x153/0x1a0 net/socket.c:2003
__sys_connect+0x165/0x1a0 net/socket.c:2020
__do_sys_connect net/socket.c:2030 [inline]
__se_sys_connect net/socket.c:2027 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:2027
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799
device_release+0xa3/0x240 drivers/base/core.c:2484
kobject_cleanup lib/kobject.c:683 [inline]
kobject_release lib/kobject.c:714 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:731
put_device+0x1f/0x30 drivers/base/core.c:3733
hci_conn_del+0x1e5/0x950 net/bluetooth/hci_conn.c:1162
hci_conn_unlink+0x2ce/0x460 net/bluetooth/hci_conn.c:1109
hci_conn_unlink+0x362/0x460 net/bluetooth/hci_conn.c:1087
hci_conn_hash_flush+0x19b/0x270 net/bluetooth/hci_conn.c:2479
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4941
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2703
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:669
do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
__do_sys_exit_group kernel/exit.c:1032 [inline]
__se_sys_exit_group kernel/exit.c:1030 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030
The buggy address belongs to the physical page:
page:ffffea0001f7d000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7df40
head:ffffea0001f7d000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1722
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3493
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2277
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x390 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3192
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291
__slab_alloc_node mm/slub.c:3344 [inline]
slab_alloc_node mm/slub.c:3441 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc+0x4e/0x190 mm/slab_common.c:979
kmalloc include/linux/slab.h:563 [inline]
tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline]
tomoyo_file_open+0xa1/0xc0 security/tomoyo/tomoyo.c:327
security_file_open+0x49/0xb0 security/security.c:2797
do_dentry_open+0x575/0x13f0 fs/open.c:907
do_open fs/namei.c:3636 [inline]
path_openat+0x1baa/0x2750 fs/namei.c:3791
do_filp_open+0x1ba/0x410 fs/namei.c:3818
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2555
free_unref_page+0x33/0x370 mm/page_alloc.c:2650
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2636
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slub.c:3451 [inline]
slab_alloc mm/slub.c:3459 [inline]
__kmem_cache_alloc_lru mm/slub.c:3466 [inline]
kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3475
ptlock_alloc+0x21/0x70 mm/memory.c:5942
ptlock_init include/linux/mm.h:2755 [inline]
pgtable_pte_page_ctor include/linux/mm.h:2776 [inline]
__pte_alloc_one include/asm-generic/pgalloc.h:66 [inline]
pte_alloc_one+0x6c/0x230 arch/x86/mm/pgtable.c:33
__pte_alloc+0x6d/0x260 mm/memory.c:439
do_anonymous_page mm/memory.c:4053 [inline]
do_pte_missing mm/memory.c:3645 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x412e/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
do_user_addr_fault+0x2ca/0x1210 arch/x86/mm/fault.c:1349
handle_page_fault arch/x86/mm/fault.c:1534 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
Memory state around the buggy address:
ffff88807df45f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88807df45f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807df46000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807df46080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807df46100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 58390c8ce1bd Merge tag 'iommu-updates-v6.4' of git://git.k..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1502fd68280000
kernel config: https://syzkaller.appspot.com/x/.config?x=d56ffc213bf6bf4a
dashboard link: https://syzkaller.appspot.com/bug?extid=8bb72f86fc823817bc5d
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=121cf70c280000
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12ace9d8280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/64e93dba0330/disk-58390c8c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2b7f3c1154f1/vmlinux-58390c8c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4ad00371a063/bzImage-58390c8c.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8bb72f...@syzkaller.appspotmail.com
==================================================================
Read of size 8 at addr ffff88807df46000 by task syz-executor183/4997
CPU: 0 PID: 4997 Comm: syz-executor183 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_report mm/kasan/report.c:462 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:572
hci_conn_hash_flush+0x244/0x270 net/bluetooth/hci_conn.c:2470
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4941
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2703
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:669
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xad3/0x2960 kernel/exit.c:871
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
__do_sys_exit_group kernel/exit.c:1032 [inline]
__se_sys_exit_group kernel/exit.c:1030 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5c483ecbe9
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Code: Unable to access opcode bytes at 0x7f5c483ecbbf.
RSP: 002b:00007ffcf6d71ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f5c484773b0 RCX: 00007f5c483ecbe9
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffb8 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5c484773b0
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
</TASK>
Allocated by task 5002:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:559 [inline]
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kzalloc include/linux/slab.h:680 [inline]
hci_conn_add+0xb8/0x16b0 net/bluetooth/hci_conn.c:986
hci_connect_sco+0x3c7/0x1050 net/bluetooth/hci_conn.c:1663
sco_connect net/bluetooth/sco.c:264 [inline]
sco_sock_connect+0x2d7/0xae0 net/bluetooth/sco.c:610
__sys_connect_file+0x153/0x1a0 net/socket.c:2003
__sys_connect+0x165/0x1a0 net/socket.c:2020
__do_sys_connect net/socket.c:2030 [inline]
__se_sys_connect net/socket.c:2027 [inline]
__x64_sys_connect+0x73/0xb0 net/socket.c:2027
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 4997:
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____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:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3786 [inline]
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____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:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
__kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799
device_release+0xa3/0x240 drivers/base/core.c:2484
kobject_cleanup lib/kobject.c:683 [inline]
kobject_release lib/kobject.c:714 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:731
put_device+0x1f/0x30 drivers/base/core.c:3733
hci_conn_del+0x1e5/0x950 net/bluetooth/hci_conn.c:1162
hci_conn_unlink+0x2ce/0x460 net/bluetooth/hci_conn.c:1109
hci_conn_unlink+0x362/0x460 net/bluetooth/hci_conn.c:1087
hci_conn_hash_flush+0x19b/0x270 net/bluetooth/hci_conn.c:2479
hci_dev_close_sync+0x5fb/0x1200 net/bluetooth/hci_sync.c:4941
hci_dev_do_close+0x31/0x70 net/bluetooth/hci_core.c:554
hci_unregister_dev+0x1ce/0x580 net/bluetooth/hci_core.c:2703
vhci_release+0x80/0xf0 drivers/bluetooth/hci_vhci.c:669
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xad3/0x2960 kernel/exit.c:871
task_work_run+0x16f/0x270 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_group_exit+0xd4/0x2a0 kernel/exit.c:1021
__do_sys_exit_group kernel/exit.c:1032 [inline]
__se_sys_exit_group kernel/exit.c:1030 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1030
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff88807df46000
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff88807df46000, ffff88807df47000)
The buggy address is located 0 bytes inside of
The buggy address belongs to the physical page:
head:ffffea0001f7d000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012442140 dead000000000122 0000000000000000
page_type: 0xffffffff()
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 5002, tgid 4997 (syz-executor183), ts 41448885910, free_ts 34737312749
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1722
prep_new_page mm/page_alloc.c:1729 [inline]
get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3493
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4759
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2277
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x390 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3192
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291
__slab_alloc_node mm/slub.c:3344 [inline]
slab_alloc_node mm/slub.c:3441 [inline]
__kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490
__do_kmalloc_node mm/slab_common.c:965 [inline]
__kmalloc+0x4e/0x190 mm/slab_common.c:979
kmalloc include/linux/slab.h:563 [inline]
tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x29a/0x3a0 security/tomoyo/file.c:771
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline]
tomoyo_file_open+0xa1/0xc0 security/tomoyo/tomoyo.c:327
security_file_open+0x49/0xb0 security/security.c:2797
do_dentry_open+0x575/0x13f0 fs/open.c:907
do_open fs/namei.c:3636 [inline]
path_openat+0x1baa/0x2750 fs/namei.c:3791
do_filp_open+0x1ba/0x410 fs/namei.c:3818
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2555
free_unref_page+0x33/0x370 mm/page_alloc.c:2650
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2636
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x195/0x220 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:711 [inline]
slab_alloc_node mm/slub.c:3451 [inline]
slab_alloc mm/slub.c:3459 [inline]
__kmem_cache_alloc_lru mm/slub.c:3466 [inline]
kmem_cache_alloc+0x17c/0x3b0 mm/slub.c:3475
ptlock_alloc+0x21/0x70 mm/memory.c:5942
ptlock_init include/linux/mm.h:2755 [inline]
pgtable_pte_page_ctor include/linux/mm.h:2776 [inline]
__pte_alloc_one include/asm-generic/pgalloc.h:66 [inline]
pte_alloc_one+0x6c/0x230 arch/x86/mm/pgtable.c:33
__pte_alloc+0x6d/0x260 mm/memory.c:439
do_anonymous_page mm/memory.c:4053 [inline]
do_pte_missing mm/memory.c:3645 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x412e/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
do_user_addr_fault+0x2ca/0x1210 arch/x86/mm/fault.c:1349
handle_page_fault arch/x86/mm/fault.c:1534 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
Memory state around the buggy address:
ffff88807df45f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88807df46000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88807df46080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88807df46100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
---
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#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
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