==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1375 [inline]
BUG: KASAN: slab-use-after-free in gfs2_qd_dealloc+0x7a/0xf0 fs/gfs2/quota.c:115
Write of size 4 at addr ffff888057ad4a78 by task syz-executor.2/5213
CPU: 1 PID: 5213 Comm: syz-executor.2 Not tainted 6.6.0-syzkaller-15029-gbe3ca57cfb77 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
check_region_inline mm/kasan/generic.c:181 [inline]
kasan_check_range+0xef/0x190 mm/kasan/generic.c:187
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1375 [inline]
gfs2_qd_dealloc+0x7a/0xf0 fs/gfs2/quota.c:115
rcu_do_batch kernel/rcu/tree.c:2153 [inline]
rcu_core+0x830/0x1c50 kernel/rcu/tree.c:2417
__do_softirq+0x21a/0x968 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:225
Code: 82 d8 15 00 00 83 f8 02 75 20 48 8b 8a e0 15 00 00 8b 92 dc 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 66 0f 1f 44 00 00 f3 0f 1e fa 41 57 41 56 41 55 41 54 55 53 48
RSP: 0018:ffffc900036e7838 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffea000462fb00 RCX: ffffffff81c11a5c
RDX: ffff888064a000c0 RSI: ffffffff81c11a76 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea000462fb00 R14: 0000000000000000 R15: ffffc900036e7aa8
folio_flags.constprop.0+0x56/0x150 include/linux/page-flags.h:315
folio_test_slab include/linux/page-flags.h:481 [inline]
folio_mapping+0x16/0x210 mm/util.c:766
__folio_cancel_dirty+0x22/0x410 mm/page-writeback.c:2824
folio_cancel_dirty include/linux/pagemap.h:1124 [inline]
truncate_cleanup_folio+0x175/0x3d0 mm/truncate.c:185
truncate_inode_folio+0x3f/0x70 mm/truncate.c:194
shmem_undo_range+0x35d/0x1030 mm/shmem.c:1000
shmem_truncate_range mm/shmem.c:1096 [inline]
shmem_evict_inode+0x39f/0xba0 mm/shmem.c:1224
evict+0x2ed/0x6b0 fs/inode.c:664
iput_final fs/inode.c:1775 [inline]
iput.part.0+0x55e/0x7a0 fs/inode.c:1801
iput+0x5c/0x80 fs/inode.c:1791
dentry_unlink_inode+0x292/0x430 fs/dcache.c:401
__dentry_kill+0x3b8/0x640 fs/dcache.c:607
dentry_kill fs/dcache.c:733 [inline]
dput+0x8b7/0xf80 fs/dcache.c:913
__fput+0x3b9/0xbb0 fs/file_table.c:402
task_work_run+0x14d/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x215/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe0fda7de17
Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffea834dfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fe0fda7de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffea834e060
RBP: 00007ffea834e060 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffea834f120
R13: 00007fe0fdac73b9 R14: 000000000004b0b1 R15: 0000000000000002
Allocated by task 13343:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
kmalloc include/linux/slab.h:600 [inline]
kzalloc include/linux/slab.h:721 [inline]
init_sbd fs/gfs2/ops_fstype.c:77 [inline]
gfs2_fill_super+0x141/0x2bf0 fs/gfs2/ops_fstype.c:1161
get_tree_bdev+0x3b5/0x650 fs/super.c:1598
gfs2_get_tree+0x4e/0x280 fs/gfs2/ops_fstype.c:1345
vfs_get_tree+0x8c/0x370 fs/super.c:1771
do_new_mount fs/namespace.c:3337 [inline]
path_mount+0x1492/0x1ed0 fs/namespace.c:3664
do_mount fs/namespace.c:3677 [inline]
__do_sys_mount fs/namespace.c:3886 [inline]
__se_sys_mount fs/namespace.c:3863 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:3863
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Freed by task 5213:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x138/0x190 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
__cache_free mm/slab.c:3370 [inline]
__do_kmem_cache_free mm/slab.c:3557 [inline]
__kmem_cache_free+0xcc/0x3d0 mm/slab.c:3564
generic_shutdown_super+0x161/0x3c0 fs/super.c:696
kill_block_super+0x3b/0x90 fs/super.c:1667
gfs2_kill_sb+0x361/0x410 fs/gfs2/ops_fstype.c:1808
deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
deactivate_super+0xde/0x100 fs/super.c:517
cleanup_mnt+0x222/0x450 fs/namespace.c:1256
task_work_run+0x14d/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x215/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88
entry_SYSCALL_64_after_hwframe+0x63/0x6b
The buggy address belongs to the object at ffff888057ad4000
which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2680 bytes inside of
freed 8192-byte region [ffff888057ad4000, ffff888057ad6000)
The buggy address belongs to the physical page:
page:ffffea00015eb500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57ad4
head:ffffea00015eb500 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0x1()
raw: 00fff00000000840 ffff888013040a00 ffffea0000918d10 ffffea000193fa10
raw: 0000000000000000 ffff888057ad4000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x2c2020(__GFP_HIGH|__GFP_NOWARN|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_THISNODE), pid 11140, tgid 11138 (syz-executor.1), ts 274118065146, free_ts 271746685153
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1544 [inline]
get_page_from_freelist+0xa25/0x36c0 mm/page_alloc.c:3312
__alloc_pages_slowpath.constprop.0+0x2dd/0x2360 mm/page_alloc.c:4102
__alloc_pages+0x411/0x4a0 mm/page_alloc.c:4581
__alloc_pages_node include/linux/gfp.h:238 [inline]
kmem_getpages mm/slab.c:1356 [inline]
cache_grow_begin+0x99/0x3a0 mm/slab.c:2550
cache_alloc_refill+0x294/0x3a0 mm/slab.c:2923
____cache_alloc mm/slab.c:2999 [inline]
____cache_alloc mm/slab.c:2982 [inline]
__do_cache_alloc mm/slab.c:3182 [inline]
slab_alloc_node mm/slab.c:3230 [inline]
__kmem_cache_alloc_node+0x3ba/0x460 mm/slab.c:3521
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc_node_track_caller+0x50/0x100 mm/slab_common.c:1027
kmalloc_reserve+0xef/0x260 net/core/skbuff.c:582
__alloc_skb+0x12b/0x330 net/core/skbuff.c:651
alloc_skb include/linux/skbuff.h:1286 [inline]
netlink_to_full_skb net/netlink/af_netlink.c:173 [inline]
__netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]
__netlink_deliver_tap net/netlink/af_netlink.c:325 [inline]
netlink_deliver_tap+0x6fe/0xd00 net/netlink/af_netlink.c:338
netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]
netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
netlink_unicast+0x5fa/0x810 net/netlink/af_netlink.c:1368
netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0xd5/0x180 net/socket.c:745
sock_sendmsg+0x128/0x1e0 net/socket.c:767
splice_to_socket+0xaac/0x1030 fs/splice.c:881
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x4f8/0xa90 mm/page_alloc.c:2347
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2487
slab_destroy mm/slab.c:1608 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1628
cache_flusharray mm/slab.c:3341 [inline]
___cache_free+0x2b7/0x420 mm/slab.c:3404
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x4c/0x1b0 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook mm/slab.h:763 [inline]
slab_alloc_node mm/slab.c:3237 [inline]
__kmem_cache_alloc_node+0x163/0x460 mm/slab.c:3521
__do_kmalloc_node mm/slab_common.c:1006 [inline]
__kmalloc+0x4f/0x100 mm/slab_common.c:1020
kmalloc include/linux/slab.h:604 [inline]
tomoyo_realpath_from_path+0xb9/0x710 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x2a3/0x3b0 security/tomoyo/file.c:771
tomoyo_file_open security/tomoyo/tomoyo.c:332 [inline]
tomoyo_file_open+0xa8/0xd0 security/tomoyo/tomoyo.c:327
security_file_open+0x6a/0xe0 security/security.c:2836
do_dentry_open+0x583/0x18d0 fs/open.c:935
do_open fs/namei.c:3622 [inline]
path_openat+0x1d4e/0x2c40 fs/namei.c:3779
do_filp_open+0x1de/0x430 fs/namei.c:3809
Memory state around the buggy address:
ffff888057ad4900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888057ad4980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888057ad4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888057ad4a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888057ad4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: d8 15 00 00 83 f8 fcoms -0x77d0000(%rip) # 0xf8830006
6: 02 75 20 add 0x20(%rbp),%dh
9: 48 8b 8a e0 15 00 00 mov 0x15e0(%rdx),%rcx
10: 8b 92 dc 15 00 00 mov 0x15dc(%rdx),%edx
16: 48 8b 01 mov (%rcx),%rax
19: 48 83 c0 01 add $0x1,%rax
1d: 48 39 d0 cmp %rdx,%rax
20: 73 07 jae 0x29
22: 48 89 01 mov %rax,(%rcx)
25: 48 89 34 c1 mov %rsi,(%rcx,%rax,8)
* 29: c3 ret <-- trapping instruction
2a: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
30: f3 0f 1e fa endbr64
34: 41 57 push %r15
36: 41 56 push %r14
38: 41 55 push %r13
3a: 41 54 push %r12
3c: 55 push %rbp
3d: 53 push %rbx
3e: 48 rex.W