KASAN: slab-out-of-bounds Read in pdu_read
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syzbot
May 15, 2019, 3:31:05 AM5/15/19
to syzkaller...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 2af67d29 Linux 4.14.119
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13d5ac30a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=20178a022ce0e39
dashboard link: https://syzkaller.appspot.com/bug?extid=df0110558e129f624612
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+df0110...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:64
Read of size 31915 at addr ffff88805d5790ad by task syz-executor.3/1977
CPU: 0 PID: 1977 Comm: syz-executor.3 Not tainted 4.14.119 #11
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0x11e/0x2db mm/kasan/report.c:393
check_memory_region_inline mm/kasan/kasan.c:260 [inline]
check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
memcpy+0x24/0x50 mm/kasan/kasan.c:302
memcpy include/linux/string.h:347 [inline]
pdu_read+0x90/0xd0 net/9p/protocol.c:64
p9pdu_vreadf net/9p/protocol.c:167 [inline]
p9pdu_readf+0xd21/0x1810 net/9p/protocol.c:540
p9_client_version net/9p/client.c:990 [inline]
p9_client_create+0xa2b/0x1130 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x16b0 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x9d/0x2a7 fs/super.c:1237
vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
do_syscall_64+0x1eb/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458da9
RSP: 002b:00007f9a86d99c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 000000000073bf00 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a86d9a6d4
R13: 00000000004c4e93 R14: 00000000004d8df0 R15: 00000000ffffffff
Allocated by task 1977:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15d/0x7a0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
p9_fcall_alloc+0x1d/0x90 net/9p/client.c:242
p9_tag_alloc net/9p/client.c:312 [inline]
p9_client_prepare_req.part.0+0x73c/0xa90 net/9p/client.c:728
p9_client_prepare_req net/9p/client.c:718 [inline]
p9_client_rpc+0x170/0x1190 net/9p/client.c:763
p9_client_version net/9p/client.c:980 [inline]
p9_client_create+0x9a3/0x1130 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x16b0 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x9d/0x2a7 fs/super.c:1237
vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
do_syscall_64+0x1eb/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 0:
(stack is not available)
The buggy address belongs to the object at ffff88805d579080
which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 45 bytes inside of
16384-byte region [ffff88805d579080, ffff88805d57d080)
The buggy address belongs to the page:
page:ffffea0001755e00 count:1 mapcount:0 mapping:ffff88805d579080 index:0x0
compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff88805d579080 0000000000000000 0000000100000001
raw: ffffea0001785020 ffffea000182f020 ffff8880aa802200 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88805d57af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88805d57b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff88805d57b080: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88805d57b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88805d57b180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
overlayfs: filesystem on './file0' not supported as upperdir
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 2af67d29 Linux 4.14.119
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13d5ac30a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=20178a022ce0e39
dashboard link: https://syzkaller.appspot.com/bug?extid=df0110558e129f624612
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+df0110...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:64
Read of size 31915 at addr ffff88805d5790ad by task syz-executor.3/1977
CPU: 0 PID: 1977 Comm: syz-executor.3 Not tainted 4.14.119 #11
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x19c lib/dump_stack.c:53
print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0x11e/0x2db mm/kasan/report.c:393
check_memory_region_inline mm/kasan/kasan.c:260 [inline]
check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
memcpy+0x24/0x50 mm/kasan/kasan.c:302
memcpy include/linux/string.h:347 [inline]
pdu_read+0x90/0xd0 net/9p/protocol.c:64
p9pdu_vreadf net/9p/protocol.c:167 [inline]
p9pdu_readf+0xd21/0x1810 net/9p/protocol.c:540
p9_client_version net/9p/client.c:990 [inline]
p9_client_create+0xa2b/0x1130 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x16b0 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x9d/0x2a7 fs/super.c:1237
vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
do_syscall_64+0x1eb/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458da9
RSP: 002b:00007f9a86d99c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 000000000073bf00 R08: 0000000020000140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a86d9a6d4
R13: 00000000004c4e93 R14: 00000000004d8df0 R15: 00000000ffffffff
Allocated by task 1977:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15d/0x7a0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
p9_fcall_alloc+0x1d/0x90 net/9p/client.c:242
p9_tag_alloc net/9p/client.c:312 [inline]
p9_client_prepare_req.part.0+0x73c/0xa90 net/9p/client.c:728
p9_client_prepare_req net/9p/client.c:718 [inline]
p9_client_rpc+0x170/0x1190 net/9p/client.c:763
p9_client_version net/9p/client.c:980 [inline]
p9_client_create+0x9a3/0x1130 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x16b0 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x9d/0x2a7 fs/super.c:1237
vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
do_syscall_64+0x1eb/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 0:
(stack is not available)
The buggy address belongs to the object at ffff88805d579080
which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 45 bytes inside of
16384-byte region [ffff88805d579080, ffff88805d57d080)
The buggy address belongs to the page:
page:ffffea0001755e00 count:1 mapcount:0 mapping:ffff88805d579080 index:0x0
compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff88805d579080 0000000000000000 0000000100000001
raw: ffffea0001785020 ffffea000182f020 ffff8880aa802200 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88805d57af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88805d57b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff88805d57b080: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88805d57b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88805d57b180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
overlayfs: filesystem on './file0' not supported as upperdir
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot
Sep 8, 2019, 2:52:06 AM9/8/19
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following crash on:
HEAD commit: 414510bc Linux 4.14.142
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1527dde1600000
kernel config: https://syzkaller.appspot.com/x/.config?x=9aa0b2ccd827f416
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158d6ce6600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+df0110...@syzkaller.appspotmail.com
random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1567925269.469:36): avc: denied { map } for
pid=6976 comm="syz-executor307" path="/root/syz-executor307587025"
dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
CPU: 0 PID: 6978 Comm: syz-executor307 Not tainted 4.14.142 #0
p9_client_version net/9p/client.c:990 [inline]
p9_client_create+0xa1f/0x1120 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x97/0x2a1 fs/super.c:1237
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x444f29
RSP: 002b:00007ffcd77aeb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444f29
RDX: 00000000200000c0 RSI: 0000000020000480 RDI: 0000000000000000
RBP: 000000000000a928 R08: 00000000200001c0 R09: 00000000004002e0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402170
R13: 0000000000402200 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 6978:
p9_client_prepare_req net/9p/client.c:718 [inline]
p9_client_rpc+0x170/0x1180 net/9p/client.c:763
p9_client_version net/9p/client.c:980 [inline]
p9_client_create+0x997/0x1120 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x97/0x2a1 fs/super.c:1237
raw: ffffea0001de8c20 ffff8880aa801c48 ffff8880aa802200 0000000000000000
ffff888097ffa480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff888097ffa500: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
^
ffff888097ffa580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888097ffa600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
HEAD commit: 414510bc Linux 4.14.142
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1527dde1600000
kernel config: https://syzkaller.appspot.com/x/.config?x=9aa0b2ccd827f416
dashboard link: https://syzkaller.appspot.com/bug?extid=df0110558e129f624612
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10c9f70a600000
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158d6ce6600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+df0110...@syzkaller.appspotmail.com
audit: type=1400 audit(1567925269.469:36): avc: denied { map } for
pid=6976 comm="syz-executor307" path="/root/syz-executor307587025"
dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:64
Read of size 52719 at addr ffff888097ff856d by task syz-executor307/6978
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in pdu_read+0x90/0xd0 net/9p/protocol.c:64
CPU: 0 PID: 6978 Comm: syz-executor307 Not tainted 4.14.142 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x138/0x197 lib/dump_stack.c:53
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393
kasan_report_error mm/kasan/report.c:351 [inline]
kasan_report mm/kasan/report.c:409 [inline]
check_memory_region_inline mm/kasan/kasan.c:260 [inline]
check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
memcpy+0x24/0x50 mm/kasan/kasan.c:302
memcpy include/linux/string.h:347 [inline]
pdu_read+0x90/0xd0 net/9p/protocol.c:64
p9pdu_vreadf net/9p/protocol.c:167 [inline]
p9pdu_readf+0x379/0x1780 net/9p/protocol.c:540
check_memory_region+0x123/0x190 mm/kasan/kasan.c:267
memcpy+0x24/0x50 mm/kasan/kasan.c:302
memcpy include/linux/string.h:347 [inline]
pdu_read+0x90/0xd0 net/9p/protocol.c:64
p9pdu_vreadf net/9p/protocol.c:167 [inline]
p9_client_version net/9p/client.c:990 [inline]
p9_client_create+0xa1f/0x1120 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x97/0x2a1 fs/super.c:1237
vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x444f29
RSP: 002b:00007ffcd77aeb98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444f29
RDX: 00000000200000c0 RSI: 0000000020000480 RDI: 0000000000000000
RBP: 000000000000a928 R08: 00000000200001c0 R09: 00000000004002e0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402170
R13: 0000000000402200 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 6978:
save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15d/0x7a0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
p9_fcall_alloc+0x1d/0x90 net/9p/client.c:242
p9_tag_alloc net/9p/client.c:312 [inline]
p9_client_prepare_req.part.0+0x73a/0xa90 net/9p/client.c:728
save_stack+0x45/0xd0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15d/0x7a0 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
p9_fcall_alloc+0x1d/0x90 net/9p/client.c:242
p9_tag_alloc net/9p/client.c:312 [inline]
p9_client_prepare_req net/9p/client.c:718 [inline]
p9_client_rpc+0x170/0x1180 net/9p/client.c:763
p9_client_version net/9p/client.c:980 [inline]
p9_client_create+0x997/0x1120 net/9p/client.c:1088
v9fs_session_init+0x1dc/0x1620 fs/9p/v9fs.c:422
v9fs_mount+0x7d/0x870 fs/9p/vfs_super.c:135
mount_fs+0x97/0x2a1 fs/super.c:1237
vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2549 [inline]
do_mount+0x417/0x27d0 fs/namespace.c:2879
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xab/0x120 fs/namespace.c:3072
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 0:
(stack is not available)
The buggy address belongs to the object at ffff888097ff8540
Freed by task 0:
(stack is not available)
which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 45 bytes inside of
16384-byte region [ffff888097ff8540, ffff888097ffc540)
The buggy address is located 45 bytes inside of
The buggy address belongs to the page:
page:ffffea00025ffe00 count:1 mapcount:0 mapping:ffff888097ff8540 index:0x0
compound_mapcount: 0
flags: 0x1fffc0000008100(slab|head)
raw: 01fffc0000008100 ffff888097ff8540 0000000000000000 0000000100000001
flags: 0x1fffc0000008100(slab|head)
raw: ffffea0001de8c20 ffff8880aa801c48 ffff8880aa802200 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888097ffa400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Memory state around the buggy address:
ffff888097ffa480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> ffff888097ffa500: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
^
ffff888097ffa580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888097ffa600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
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