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BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_dec include/linux/atomic/atomic-instrumented.h:244 [inline]
BUG: KASAN: use-after-free in gfs2_qd_dispose fs/gfs2/quota.c:137 [inline]
BUG: KASAN: use-after-free in gfs2_qd_shrink_scan+0x584/0x7e4 fs/gfs2/quota.c:175
Write of size 4 at addr ffff0000cd988a70 by task syz.0.3166/11206
CPU: 0 PID: 11206 Comm: syz.0.3166 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x174/0x1e4 mm/kasan/report.c:451
kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
__kasan_check_write+0x44/0x54 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_dec include/linux/atomic/atomic-instrumented.h:244 [inline]
gfs2_qd_dispose fs/gfs2/quota.c:137 [inline]
gfs2_qd_shrink_scan+0x584/0x7e4 fs/gfs2/quota.c:175
do_shrink_slab+0x4b4/0x10b0 mm/vmscan.c:758
shrink_slab+0x1f8/0x894 mm/vmscan.c:918
drop_slab_node+0xcc/0x170 mm/vmscan.c:953
drop_slab+0x98/0x140 mm/vmscan.c:963
drop_caches_sysctl_handler+0x178/0x394 fs/drop_caches.c:66
proc_sys_call_handler+0x4cc/0x7cc fs/proc/proc_sysctl.c:585
proc_sys_write+0x2c/0x3c fs/proc/proc_sysctl.c:611
do_iter_readv_writev+0x420/0x5f8
do_iter_write+0x1b8/0x66c fs/read_write.c:855
vfs_writev fs/read_write.c:928 [inline]
do_writev+0x220/0x3ec fs/read_write.c:971
__do_sys_writev fs/read_write.c:1044 [inline]
__se_sys_writev fs/read_write.c:1041 [inline]
__arm64_sys_writev+0x80/0x94 fs/read_write.c:1041
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Allocated by task 11071:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
__kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
kasan_kmalloc include/linux/kasan.h:264 [inline]
kmem_cache_alloc_trace+0x27c/0x47c mm/slub.c:3247
kmalloc include/linux/slab.h:591 [inline]
kzalloc include/linux/slab.h:721 [inline]
init_sbd fs/gfs2/ops_fstype.c:77 [inline]
gfs2_fill_super+0x140/0x2010 fs/gfs2/ops_fstype.c:1151
get_tree_bdev+0x360/0x54c fs/super.c:1323
gfs2_get_tree+0x54/0x1b4 fs/gfs2/ops_fstype.c:1332
vfs_get_tree+0x90/0x274 fs/super.c:1528
do_new_mount+0x278/0x8fc fs/namespace.c:3005
path_mount+0x594/0x101c fs/namespace.c:3335
do_mount fs/namespace.c:3348 [inline]
__do_sys_mount fs/namespace.c:3556 [inline]
__se_sys_mount fs/namespace.c:3533 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Freed by task 8343:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x84 mm/kasan/common.c:46
kasan_set_free_info+0x28/0x4c mm/kasan/generic.c:360
____kasan_slab_free+0x118/0x164 mm/kasan/common.c:366
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:374
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:1705 [inline]
slab_free_freelist_hook+0x128/0x1ec mm/slub.c:1731
slab_free mm/slub.c:3499 [inline]
kfree+0x178/0x410 mm/slub.c:4559
free_sbd+0x5c/0x6c fs/gfs2/ops_fstype.c:69
gfs2_put_super+0x60c/0x684 fs/gfs2/super.c:632
generic_shutdown_super+0x130/0x29c fs/super.c:475
kill_block_super+0x70/0xdc fs/super.c:1425
gfs2_kill_sb+0xc0/0xd4
deactivate_locked_super+0xb8/0x13c fs/super.c:335
deactivate_super+0x108/0x128 fs/super.c:366
cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
__cleanup_mnt+0x20/0x30 fs/namespace.c:1150
task_work_run+0x130/0x1e4 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
The buggy address belongs to the object at ffff0000cd988000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2672 bytes inside of
8192-byte region [ffff0000cd988000, ffff0000cd98a000)
The buggy address belongs to the page:
page:00000000d7698f53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d988
head:00000000d7698f53 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 0000000000000000 0000000100000001 ffff0000c0002c00
raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000cd988900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000cd988980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000cd988a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000cd988a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000cd988b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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syz.0.3166 (11206): drop_caches: 2