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BUG: KASAN: use-after-free in __lock_acquire+0x31af/0x3b60 kernel/locking/lockdep.c:3827
Read of size 8 at addr ffff8881d08c9910 by task syz-executor.1/22314
CPU: 0 PID: 22314 Comm: syz-executor.1 Not tainted 5.5.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xef/0x16e lib/dump_stack.c:118
print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374
__kasan_report.cold+0x37/0x85 mm/kasan/report.c:506
kasan_report+0xe/0x20 mm/kasan/common.c:639
__lock_acquire+0x31af/0x3b60 kernel/locking/lockdep.c:3827
lock_acquire+0x130/0x340 kernel/locking/lockdep.c:4484
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x32/0x50 kernel/locking/spinlock.c:159
xpad_play_effect+0xfe/0xcc0 drivers/input/joystick/xpad.c:1225
ml_play_effects+0x817/0x1270 drivers/input/ff-memless.c:398
ml_ff_playback+0x293/0x430 drivers/input/ff-memless.c:460
input_ff_event+0x13a/0x2e0 drivers/input/ff-core.c:286
input_handle_event+0x732/0x13a0 drivers/input/input.c:375
input_inject_event+0x305/0x31e drivers/input/input.c:470
evdev_write+0x2c9/0x410 drivers/input/evdev.c:542
__vfs_write+0x76/0x100 fs/read_write.c:494
vfs_write+0x262/0x5c0 fs/read_write.c:558
ksys_write+0x1e8/0x250 fs/read_write.c:611
do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b349
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2be0106c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2be01076d4 RCX: 000000000045b349
RDX: 0000000000000364 RSI: 00000000200000c0 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000ca7 R14: 00000000004cd867 R15: 000000000075bf2c
Allocated by task 1675:
save_stack+0x1b/0x80 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
__kasan_kmalloc mm/kasan/common.c:513 [inline]
__kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:486
kmalloc include/linux/slab.h:556 [inline]
syslog_print kernel/printk/printk.c:1356 [inline]
do_syslog kernel/printk/printk.c:1529 [inline]
do_syslog+0x53b/0x1380 kernel/printk/printk.c:1503
kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40
proc_reg_read+0x1c1/0x280 fs/proc/inode.c:223
__vfs_read+0x76/0x100 fs/read_write.c:425
vfs_read+0x1ea/0x430 fs/read_write.c:461
ksys_read+0x127/0x250 fs/read_write.c:587
do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 1675:
save_stack+0x1b/0x80 mm/kasan/common.c:72
set_track mm/kasan/common.c:80 [inline]
kasan_set_free_info mm/kasan/common.c:335 [inline]
__kasan_slab_free+0x117/0x160 mm/kasan/common.c:474
slab_free_hook mm/slub.c:1425 [inline]
slab_free_freelist_hook mm/slub.c:1458 [inline]
slab_free mm/slub.c:3005 [inline]
kfree+0xd5/0x300 mm/slub.c:3957
syslog_print kernel/printk/printk.c:1415 [inline]
do_syslog kernel/printk/printk.c:1529 [inline]
do_syslog+0x1104/0x1380 kernel/printk/printk.c:1503
kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40
proc_reg_read+0x1c1/0x280 fs/proc/inode.c:223
__vfs_read+0x76/0x100 fs/read_write.c:425
vfs_read+0x1ea/0x430 fs/read_write.c:461
ksys_read+0x127/0x250 fs/read_write.c:587
do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8881d08c9800
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 272 bytes inside of
1024-byte region [ffff8881d08c9800, ffff8881d08c9c00)
The buggy address belongs to the page:
page:ffffea0007423200 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0x0 compound_mapcount: 0
raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da002280
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8881d08c9800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881d08c9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881d08c9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8881d08c9980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8881d08c9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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