==================================================================
BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:229 [inline]
BUG: KASAN: slab-use-after-free in release_metapage+0x680/0xa3c fs/jfs/jfs_metapage.c:784
Read of size 8 at addr ffff0000c7b32218 by task syz.3.257/8427
CPU: 0 UID: 0 PID: 8427 Comm: syz.3.257 Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
__dump_stack+0x30/0x40 lib/dump_stack.c:94
dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
print_address_description+0xa8/0x254 mm/kasan/report.c:408
print_report+0x68/0x84 mm/kasan/report.c:521
kasan_report+0xb0/0x110 mm/kasan/report.c:634
__asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
drop_metapage fs/jfs/jfs_metapage.c:229 [inline]
release_metapage+0x680/0xa3c fs/jfs/jfs_metapage.c:784
write_metapage fs/jfs/jfs_metapage.h:75 [inline]
flush_metapage fs/jfs/jfs_metapage.h:81 [inline]
ea_put fs/jfs/xattr.c:623 [inline]
__jfs_setxattr+0xbd0/0xf84 fs/jfs/xattr.c:792
jfs_initxattrs+0x150/0x22c fs/jfs/xattr.c:1040
security_inode_init_security+0x6dc/0x7f4 security/security.c:1852
jfs_init_security+0xa4/0xec fs/jfs/xattr.c:1052
jfs_mkdir+0x228/0x8b4 fs/jfs/namei.c:240
vfs_mkdir+0x284/0x424 fs/namei.c:4359
do_mkdirat+0x1f8/0x4c8 fs/namei.c:4392
__do_sys_mkdirat fs/namei.c:4409 [inline]
__se_sys_mkdirat fs/namei.c:4407 [inline]
__arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4407
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Allocated by task 8427:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x40/0x78 mm/kasan/common.c:68
kasan_save_alloc_info+0x44/0x54 mm/kasan/generic.c:562
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4147 [inline]
slab_alloc_node mm/slub.c:4196 [inline]
kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4203
mempool_alloc_slab+0x58/0x74 mm/mempool.c:559
mempool_alloc_noprof+0x150/0x3f4 mm/mempool.c:402
alloc_metapage fs/jfs/jfs_metapage.c:182 [inline]
__get_metapage+0x528/0xe8c fs/jfs/jfs_metapage.c:652
ea_get+0x868/0xec4 fs/jfs/xattr.c:528
__jfs_setxattr+0x460/0xf84 fs/jfs/xattr.c:727
jfs_initxattrs+0x150/0x22c fs/jfs/xattr.c:1040
security_inode_init_security+0x6dc/0x7f4 security/security.c:1852
jfs_init_security+0xa4/0xec fs/jfs/xattr.c:1052
jfs_mkdir+0x228/0x8b4 fs/jfs/namei.c:240
vfs_mkdir+0x284/0x424 fs/namei.c:4359
do_mkdirat+0x1f8/0x4c8 fs/namei.c:4392
__do_sys_mkdirat fs/namei.c:4409 [inline]
__se_sys_mkdirat fs/namei.c:4407 [inline]
__arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4407
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Freed by task 8428:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x40/0x78 mm/kasan/common.c:68
kasan_save_free_info+0x58/0x70 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x68/0x88 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kmem_cache_free+0x184/0x550 mm/slub.c:4744
mempool_free_slab+0x28/0x38 mm/mempool.c:566
mempool_free+0xbc/0x2e8 mm/mempool.c:548
free_metapage fs/jfs/jfs_metapage.c:197 [inline]
metapage_release_folio+0x374/0x48c fs/jfs/jfs_metapage.c:552
metapage_invalidate_folio+0x14c/0x1cc fs/jfs/jfs_metapage.c:564
folio_invalidate mm/truncate.c:140 [inline]
truncate_cleanup_folio+0x264/0x3a0 mm/truncate.c:160
truncate_inode_pages_range+0x1f4/0xdec mm/truncate.c:375
truncate_inode_pages+0x2c/0x3c mm/truncate.c:456
jfs_reconfigure+0x474/0x824 fs/jfs/super.c:406
reconfigure_super+0x1d4/0x6f0 fs/super.c:1083
vfs_cmd_reconfigure fs/fsopen.c:262 [inline]
vfs_fsconfig_locked+0x140/0x2c8 fs/fsopen.c:291
__do_sys_fsconfig fs/fsopen.c:467 [inline]
__se_sys_fsconfig fs/fsopen.c:344 [inline]
__arm64_sys_fsconfig+0x654/0x7a0 fs/fsopen.c:344
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
The buggy address belongs to the object at ffff0000c7b321f0
which belongs to the cache jfs_mp of size 184
The buggy address is located 40 bytes inside of
freed 184-byte region [ffff0000c7b321f0, ffff0000c7b322a8)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107b32
anon flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 05ffc00000000000 ffff0000c4a0b140 0000000000000000 0000000000000001
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000c7b32100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000c7b32180: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb
>ffff0000c7b32200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000c7b32280: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00
ffff0000c7b32300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
read_mapping_page failed!
ERROR: (device loop3): txAbort:
ERROR: (device loop3): remounting filesystem as read-only