================================================================== BUG: KASAN: slab-out-of-bounds in diWrite+0x91c/0x1218 fs/jfs/jfs_imap.c:753 Write of size 32 at addr ffff0000e94724e0 by task syz.2.50/4334 CPU: 1 PID: 4334 Comm: syz.2.50 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x78/0x30c mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xec/0x15c mm/kasan/report.c:451 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x270/0x2b0 mm/kasan/generic.c:189 memcpy+0xb4/0xe8 mm/kasan/shadow.c:66 diWrite+0x91c/0x1218 fs/jfs/jfs_imap.c:753 txCommit+0x5d4/0x3c1c fs/jfs/jfs_txnmgr.c:1255 add_missing_indices+0x6e4/0xa0c fs/jfs/jfs_dtree.c:2960 jfs_readdir+0x1880/0x3024 fs/jfs/jfs_dtree.c:3316 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x11c/0x340 fs/readdir.c:354 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Allocated by task 4148: 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 mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb0/0xf0 mm/kasan/common.c:522 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x298/0x44c mm/slub.c:4407 kmalloc include/linux/slab.h:609 [inline] kzalloc include/linux/slab.h:735 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x274/0x4a4 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x4bc/0x510 security/tomoyo/realpath.c:288 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x1b4/0x440 security/tomoyo/file.c:822 tomoyo_path_unlink+0xa4/0xe8 security/tomoyo/tomoyo.c:149 security_path_unlink+0xe4/0x134 security/security.c:1170 do_unlinkat+0x280/0x600 fs/namei.c:4344 __do_sys_unlinkat fs/namei.c:4391 [inline] __se_sys_unlinkat fs/namei.c:4384 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4384 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Freed by task 4148: 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+0x128/0x1e8 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kfree+0x170/0x40c mm/slub.c:4559 tomoyo_path_perm+0x334/0x440 security/tomoyo/file.c:842 tomoyo_path_unlink+0xa4/0xe8 security/tomoyo/tomoyo.c:149 security_path_unlink+0xe4/0x134 security/security.c:1170 do_unlinkat+0x280/0x600 fs/namei.c:4344 __do_sys_unlinkat fs/namei.c:4391 [inline] __se_sys_unlinkat fs/namei.c:4384 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4384 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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 ffff0000e9472400 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 96 bytes to the right of 128-byte region [ffff0000e9472400, ffff0000e9472480) The buggy address belongs to the page: page:000000007d42c010 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x129472 flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000200 0000000000000000 0000000100000001 ffff0000c0002300 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e9472380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000e9472400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000e9472480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000e9472500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000e9472580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ... Log Wrap ... Log Wrap ... Log Wrap ... ERROR: (device loop2): jfs_readdir: JFS:Dtree error: ino = 2, bn=0, index = 0 JFS: Invalid stbl[1] = -128 for inode 2, block = 0