loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 3 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
loop0: detected capacity change from 32768 to 64
syz.0.0: attempt to access beyond end of device
loop0: rw=12288, sector=18720, nr_sectors = 8 limit=64
capability: warning: `syz.0.0' uses deprecated v2 capabilities in a way that may be insecure
syz.0.0: attempt to access beyond end of device
loop0: rw=12288, sector=18720, nr_sectors = 8 limit=64
==================================================================
BUG: KASAN: slab-use-after-free in __list_lru_walk_one+0xfb/0x420 mm/list_lru.c:293
Read of size 8 at addr ffff88804450d078 by task syz.0.0/5360
CPU: 0 UID: 0 PID: 5360 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:378 [inline]
print_report+0xca/0x240 mm/kasan/report.c:482
kasan_report+0x118/0x150 mm/kasan/report.c:595
__list_lru_walk_one+0xfb/0x420 mm/list_lru.c:293
list_lru_walk_one+0x3c/0x50 mm/list_lru.c:341
list_lru_shrink_walk include/linux/list_lru.h:262 [inline]
gfs2_qd_shrink_scan+0x155/0x330 fs/gfs2/quota.c:182
do_shrink_slab+0x6ef/0x1110 mm/shrinker.c:437
shrink_slab+0xd74/0x10d0 mm/shrinker.c:664
drop_slab_node mm/vmscan.c:441 [inline]
drop_slab+0x14e/0x290 mm/vmscan.c:459
drop_caches_sysctl_handler+0xc7/0x170 fs/drop_caches.c:68
proc_sys_call_handler+0x509/0x7c0 fs/proc/proc_sysctl.c:600
do_iter_readv_writev+0x61c/0x8b0 fs/read_write.c:-1
vfs_writev+0x31a/0x960 fs/read_write.c:1057
do_writev+0x14d/0x2d0 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2be338eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2be42bd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f2be35e5fa0 RCX: 00007f2be338eec9
RDX: 0000000000000001 RSI: 00002000000000c0 RDI: 0000000000000007
RBP: 00007f2be3411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2be35e6038 R14: 00007f2be35e5fa0 R15: 00007ffed4696f48
</TASK>
Allocated by task 5360:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:330 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4191 [inline]
slab_alloc_node mm/slub.c:4240 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4247
qd_alloc+0x50/0x250 fs/gfs2/quota.c:234
gfs2_quota_init+0x777/0x1230 fs/gfs2/quota.c:1448
gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149
gfs2_fill_super+0x1a7b/0x20d0 fs/gfs2/ops_fstype.c:1278
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
do_mount fs/namespace.c:4136 [inline]
__do_sys_mount fs/namespace.c:4347 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4324
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 5360:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:243 [inline]
__kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2422 [inline]
slab_free mm/slub.c:4695 [inline]
kmem_cache_free+0x18f/0x400 mm/slub.c:4797
gfs2_qd_dealloc+0x70/0xe0 fs/gfs2/quota.c:111
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xca8/0x1770 kernel/rcu/tree.c:2861
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548
__call_rcu_common kernel/rcu/tree.c:3123 [inline]
call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243
gfs2_quota_sync+0x3c4/0x460 fs/gfs2/quota.c:1361
gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:658
sync_filesystem+0xee/0x230 fs/sync.c:56
gfs2_reconfigure+0xbb/0xb20 fs/gfs2/ops_fstype.c:1555
reconfigure_super+0x224/0x890 fs/super.c:1077
vfs_cmd_reconfigure fs/fsopen.c:262 [inline]
vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:291
__do_sys_fsconfig fs/fsopen.c:467 [inline]
__se_sys_fsconfig+0x78e/0x8d0 fs/fsopen.c:344
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88804450d000
which belongs to the cache gfs2_quotad of size 272
The buggy address is located 120 bytes inside of
freed 272-byte region [ffff88804450d000, ffff88804450d110)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4450d
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff8880326ed000 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x52c50(GFP_NOFS|__GFP_RECLAIMABLE|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5360, tgid 5359 (syz.0.0), ts 76532803072, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:2492 [inline]
allocate_slab+0x8a/0x370 mm/slub.c:2660
new_slab mm/slub.c:2714 [inline]
___slab_alloc+0xbeb/0x1420 mm/slub.c:3901
__slab_alloc mm/slub.c:3992 [inline]
__slab_alloc_node mm/slub.c:4067 [inline]
slab_alloc_node mm/slub.c:4228 [inline]
kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4247
qd_alloc+0x50/0x250 fs/gfs2/quota.c:234
gfs2_quota_init+0x777/0x1230 fs/gfs2/quota.c:1448
gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149
gfs2_fill_super+0x1a7b/0x20d0 fs/gfs2/ops_fstype.c:1278
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335
vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
do_mount fs/namespace.c:4136 [inline]
__do_sys_mount fs/namespace.c:4347 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4324
page_owner free stack trace missing
Memory state around the buggy address:
ffff88804450cf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88804450cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88804450d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88804450d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804450d100: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb
==================================================================