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| Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
|---|---|---|---|---|---|---|---|---|---|
| linux-4.19 | KASAN: slab-out-of-bounds Read in __nla_put_nohdr | C | done | 1 | 1758d | 1758d | 1/1 | fixed on 2020/02/28 16:14 | |
| upstream | KASAN: slab-out-of-bounds Read in __nla_put_nohdr net | C | done | 4 | 1765d | 1765d | 15/28 | fixed on 2020/02/18 14:31 |
audit: type=1400 audit(1580164526.071:36): avc: denied { map } for pid=7355 comm="syz-executor935" path="/root/syz-executor935341964" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:347 [inline]
BUG: KASAN: slab-out-of-bounds in __nla_put_nohdr+0x46/0x50 lib/nlattr.c:585
Read of size 8 at addr ffff88809fb72f80 by task syz-executor935/7356
CPU: 0 PID: 7356 Comm: syz-executor935 Not tainted 4.14.168-syzkaller #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+0x142/0x197 lib/dump_stack.c:58
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
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]
__nla_put_nohdr+0x46/0x50 lib/nlattr.c:585
nla_put_nohdr+0xe8/0x120 lib/nlattr.c:651
tcf_em_tree_dump+0x5d1/0x890 net/sched/ematch.c:474
basic_dump net/sched/cls_basic.c:290 [inline]
basic_dump+0x1bd/0x410 net/sched/cls_basic.c:270
tcf_fill_node+0x536/0x860 net/sched/cls_api.c:453
tfilter_notify+0x11d/0x240 net/sched/cls_api.c:476
tc_ctl_tfilter+0x1048/0x1aba net/sched/cls_api.c:743
rtnetlink_rcv_msg+0x3da/0xb70 net/core/rtnetlink.c:4306
netlink_rcv_skb+0x14f/0x3c0 net/netlink/af_netlink.c:2432
rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4318
netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
netlink_unicast+0x44d/0x650 net/netlink/af_netlink.c:1312
netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xce/0x110 net/socket.c:656
___sys_sendmsg+0x70a/0x840 net/socket.c:2062
__sys_sendmsg+0xb9/0x140 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x2d/0x50 net/socket.c:2103
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4410b9
RSP: 002b:00007ffff343aaf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004a28b0 RCX: 00000000004410b9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00000000006cc018 R08: 0000000120080522 R09: 0000000120080522
R10: 0000000120080522 R11: 0000000000000246 R12: 00000000004025c0
R13: 0000000000402650 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 7356:
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_track_caller+0x159/0x790 mm/slab.c:3735
kmemdup+0x27/0x60 mm/util.c:118
kmemdup include/linux/string.h:420 [inline]
em_nbyte_change+0xb9/0x130 net/sched/em_nbyte.c:36
tcf_em_validate net/sched/ematch.c:245 [inline]
tcf_em_tree_validate net/sched/ematch.c:362 [inline]
tcf_em_tree_validate+0x922/0xe7e net/sched/ematch.c:304
basic_set_parms net/sched/cls_basic.c:158 [inline]
basic_change+0x451/0xfb0 net/sched/cls_basic.c:222
tc_ctl_tfilter+0xff1/0x1aba net/sched/cls_api.c:738
rtnetlink_rcv_msg+0x3da/0xb70 net/core/rtnetlink.c:4306
netlink_rcv_skb+0x14f/0x3c0 net/netlink/af_netlink.c:2432
rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4318
netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline]
netlink_unicast+0x44d/0x650 net/netlink/af_netlink.c:1312
netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877
sock_sendmsg_nosec net/socket.c:646 [inline]
sock_sendmsg+0xce/0x110 net/socket.c:656
___sys_sendmsg+0x70a/0x840 net/socket.c:2062
__sys_sendmsg+0xb9/0x140 net/socket.c:2096
SYSC_sendmsg net/socket.c:2107 [inline]
SyS_sendmsg+0x2d/0x50 net/socket.c:2103
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
Freed by task 5619:
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_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kfree+0xcc/0x270 mm/slab.c:3815
xattr_getsecurity+0x104/0x110 fs/xattr.c:253
vfs_getxattr+0xc6/0x110 fs/xattr.c:333
getxattr+0xef/0x2a0 fs/xattr.c:540
path_getxattr+0xa3/0x100 fs/xattr.c:568
SYSC_lgetxattr fs/xattr.c:586 [inline]
SyS_lgetxattr+0x31/0x40 fs/xattr.c:583
do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
The buggy address belongs to the object at ffff88809fb72f80
which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes inside of
32-byte region [ffff88809fb72f80, ffff88809fb72fa0)
The buggy address belongs to the page:
page:ffffea00027edc80 count:1 mapcount:0 mapping:ffff88809fb72000 index:0xffff88809fb72fc1
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff88809fb72000 ffff88809fb72fc1 000000010000003b
raw: ffffea00027e1aa0 ffffea00027d7120 ffff8880aa8001c0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88809fb72e80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
ffff88809fb72f00: 06 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88809fb72f80: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88809fb73000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88809fb73080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020/01/27 22:38 | linux-4.14.y | 9a95f25269bd | 56cd6c9b | .config | console log | report | syz | C | ci2-linux-4-14 | |||
| 2020/01/27 22:04 | linux-4.14.y | 9a95f25269bd | 56cd6c9b | .config | console log | report | ci2-linux-4-14 |