2021-02-10 16:09:14

by syzbot

[permalink] [raw]
Subject: KASAN: invalid-free in ieee80211_ibss_leave

Hello,

syzbot found the following issue on:

HEAD commit: b75dba7f Merge tag 'libnvdimm-fixes-5.11-rc7' of git://git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1570c95f500000
kernel config: https://syzkaller.appspot.com/x/.config?x=e83e68d0a6aba5f6
dashboard link: https://syzkaller.appspot.com/bug?extid=93976391bf299d425f44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=136f4d08d00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1278c7fcd00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]

==================================================================
BUG: KASAN: double-free or invalid-free in ieee80211_ibss_leave+0x83/0xe0 net/mac80211/ibss.c:1876

CPU: 0 PID: 8472 Comm: syz-executor100 Not tainted 5.11.0-rc6-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+0x107/0x163 lib/dump_stack.c:120
print_address_description.constprop.0.cold+0x5b/0x2c6 mm/kasan/report.c:230
kasan_report_invalid_free+0x51/0x80 mm/kasan/report.c:355
____kasan_slab_free+0xcc/0xe0 mm/kasan/common.c:341
kasan_slab_free include/linux/kasan.h:192 [inline]
__cache_free mm/slab.c:3424 [inline]
kfree+0xed/0x270 mm/slab.c:3760
ieee80211_ibss_leave+0x83/0xe0 net/mac80211/ibss.c:1876
rdev_leave_ibss net/wireless/rdev-ops.h:545 [inline]
__cfg80211_leave_ibss+0x19a/0x4c0 net/wireless/ibss.c:212
__cfg80211_leave+0x327/0x430 net/wireless/core.c:1172
cfg80211_leave net/wireless/core.c:1221 [inline]
cfg80211_netdev_notifier_call+0x9e8/0x12c0 net/wireless/core.c:1335
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2040
call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
call_netdevice_notifiers net/core/dev.c:2066 [inline]
__dev_close_many+0xee/0x2e0 net/core/dev.c:1586
__dev_close net/core/dev.c:1624 [inline]
__dev_change_flags+0x2cb/0x730 net/core/dev.c:8476
dev_change_flags+0x8a/0x160 net/core/dev.c:8549
dev_ifsioc+0x210/0xa70 net/core/dev_ioctl.c:265
dev_ioctl+0x1b1/0xc40 net/core/dev_ioctl.c:511
sock_do_ioctl+0x148/0x2d0 net/socket.c:1060
sock_ioctl+0x477/0x6a0 net/socket.c:1177
vfs_ioctl fs/ioctl.c:48 [inline]
__do_sys_ioctl fs/ioctl.c:753 [inline]
__se_sys_ioctl fs/ioctl.c:739 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x446c99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa8353b02f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004cb440 RCX: 0000000000446c99
RDX: 00000000200008c0 RSI: 0000000000008914 RDI: 0000000000000005
RBP: 00000000004cb44c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000049b07c
R13: 0031313230386c6e R14: 0ba62cdd87f75d44 R15: 00000000004cb448

Allocated by task 8465:
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:401 [inline]
____kasan_kmalloc.constprop.0+0x7f/0xa0 mm/kasan/common.c:429
kasan_kmalloc include/linux/kasan.h:219 [inline]
__do_kmalloc mm/slab.c:3659 [inline]
__kmalloc_track_caller+0x20a/0x440 mm/slab.c:3674
kmemdup+0x23/0x50 mm/util.c:128
kmemdup include/linux/string.h:520 [inline]
ieee80211_ibss_join+0x8cf/0xfe0 net/mac80211/ibss.c:1824
rdev_join_ibss net/wireless/rdev-ops.h:535 [inline]
__cfg80211_join_ibss+0x807/0x1200 net/wireless/ibss.c:144
nl80211_join_ibss+0xcbb/0x12b0 net/wireless/nl80211.c:10229
genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x6e8/0x810 net/socket.c:2345
___sys_sendmsg+0xf3/0x170 net/socket.c:2399
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2432
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 8473:
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:356
____kasan_slab_free+0xb0/0xe0 mm/kasan/common.c:362
kasan_slab_free include/linux/kasan.h:192 [inline]
__cache_free mm/slab.c:3424 [inline]
kfree+0xed/0x270 mm/slab.c:3760
ieee80211_ibss_leave+0x83/0xe0 net/mac80211/ibss.c:1876
rdev_leave_ibss net/wireless/rdev-ops.h:545 [inline]
__cfg80211_leave_ibss+0x19a/0x4c0 net/wireless/ibss.c:212
__cfg80211_leave+0x327/0x430 net/wireless/core.c:1172
cfg80211_leave net/wireless/core.c:1221 [inline]
cfg80211_netdev_notifier_call+0x9e8/0x12c0 net/wireless/core.c:1335
notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2040
call_netdevice_notifiers_extack net/core/dev.c:2052 [inline]
call_netdevice_notifiers net/core/dev.c:2066 [inline]
__dev_close_many+0xee/0x2e0 net/core/dev.c:1586
__dev_close net/core/dev.c:1624 [inline]
__dev_change_flags+0x2cb/0x730 net/core/dev.c:8476
dev_change_flags+0x8a/0x160 net/core/dev.c:8549
dev_ifsioc+0x210/0xa70 net/core/dev_ioctl.c:265
dev_ioctl+0x1b1/0xc40 net/core/dev_ioctl.c:511
sock_do_ioctl+0x148/0x2d0 net/socket.c:1060
sock_ioctl+0x477/0x6a0 net/socket.c:1177
vfs_ioctl fs/ioctl.c:48 [inline]
__do_sys_ioctl fs/ioctl.c:753 [inline]
__se_sys_ioctl fs/ioctl.c:739 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9

Last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0x87/0xb0 mm/kasan/generic.c:344
insert_work+0x48/0x370 kernel/workqueue.c:1331
__queue_work+0x5c1/0xf00 kernel/workqueue.c:1497
queue_work_on+0xc7/0xd0 kernel/workqueue.c:1524
queue_work include/linux/workqueue.h:507 [inline]
call_usermodehelper_exec+0x1f0/0x4c0 kernel/umh.c:433
kobject_uevent_env+0xf9f/0x1680 lib/kobject_uevent.c:617
kobject_synth_uevent+0x701/0x850 lib/kobject_uevent.c:208
uevent_store+0x20/0x50 drivers/base/core.c:2160
dev_attr_store+0x50/0x80 drivers/base/core.c:1861
sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139
kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:1901 [inline]
new_sync_write+0x426/0x650 fs/read_write.c:518
vfs_write+0x791/0xa30 fs/read_write.c:605
ksys_write+0x12d/0x250 fs/read_write.c:658
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9

Second to last potentially related work creation:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_record_aux_stack+0x87/0xb0 mm/kasan/generic.c:344
insert_work+0x48/0x370 kernel/workqueue.c:1331
__queue_work+0x5c1/0xf00 kernel/workqueue.c:1497
queue_work_on+0xc7/0xd0 kernel/workqueue.c:1524
queue_work include/linux/workqueue.h:507 [inline]
call_usermodehelper_exec+0x1f0/0x4c0 kernel/umh.c:433
kobject_uevent_env+0xf9f/0x1680 lib/kobject_uevent.c:617
kobject_synth_uevent+0x701/0x850 lib/kobject_uevent.c:208
uevent_store+0x20/0x50 drivers/base/core.c:2160
dev_attr_store+0x50/0x80 drivers/base/core.c:1861
sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139
kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296
call_write_iter include/linux/fs.h:1901 [inline]
new_sync_write+0x426/0x650 fs/read_write.c:518
vfs_write+0x791/0xa30 fs/read_write.c:605
ksys_write+0x12d/0x250 fs/read_write.c:658
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff88801c155f00
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 0 bytes inside of
192-byte region [ffff88801c155f00, ffff88801c155fc0)
The buggy address belongs to the page:
page:000000001221e238 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801c155900 pfn:0x1c155
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea0000928b48 ffffea00006de508 ffff888010c40000
raw: ffff88801c155900 ffff88801c155000 000000010000000d 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff88801c155e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88801c155e80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88801c155f00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801c155f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88801c156000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================


---
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