ERROR: (device loop4): txAbort: read_mapping_page failed! ERROR: (device loop4): txAbort: ================================================================== BUG: KASAN: slab-out-of-bounds in dtSplitPage+0xcf8/0x2888 fs/jfs/jfs_dtree.c:-1 Read of size 1 at addr ffff0000de122dd5 by task syz.4.699/6700 CPU: 0 PID: 6700 Comm: syz.4.699 Not tainted 5.15.183-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 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 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306 dtSplitPage+0xcf8/0x2888 fs/jfs/jfs_dtree.c:-1 dtSplitUp fs/jfs/jfs_dtree.c:1090 [inline] dtInsert+0xc3c/0x5634 fs/jfs/jfs_dtree.c:869 jfs_mkdir+0x5a4/0x8b4 fs/jfs/namei.c:270 vfs_mkdir+0x314/0x4d4 fs/namei.c:4065 do_mkdirat+0x1bc/0x508 fs/namei.c:4090 __do_sys_mkdirat fs/namei.c:4105 [inline] __se_sys_mkdirat fs/namei.c:4103 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103 __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 6700: 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_slab_alloc+0x8c/0xcc mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x74/0x408 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x1e0/0x3e4 mm/slub.c:3233 jfs_alloc_inode+0x24/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] iget_locked+0x178/0x710 fs/inode.c:1308 jfs_iget+0x30/0x374 fs/jfs/inode.c:29 jfs_lookup+0x198/0x32c fs/jfs/namei.c:1467 __lookup_slow+0x24c/0x380 fs/namei.c:1663 lookup_slow+0x5c/0x80 fs/namei.c:1680 walk_component+0x2b0/0x3a8 fs/namei.c:1976 link_path_walk+0x590/0xb8c fs/namei.c:-1 path_parentat fs/namei.c:2502 [inline] __filename_parentat+0x1b0/0x510 fs/namei.c:2526 filename_parentat fs/namei.c:2544 [inline] do_renameat2+0x224/0xcdc fs/namei.c:4901 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __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 Last potentially related work creation: kasan_save_stack+0x38/0x68 mm/kasan/common.c:38 kasan_record_aux_stack+0xcc/0x114 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x110/0x8f0 kernel/rcu/tree.c:3087 destroy_inode fs/inode.c:316 [inline] evict+0x748/0x810 fs/inode.c:662 iput_final fs/inode.c:1769 [inline] iput+0x6c4/0x77c fs/inode.c:1795 iget_failed+0x148/0x194 fs/bad_inode.c:250 jfs_iget+0x158/0x374 fs/jfs/inode.c:37 jfs_fill_super+0x5f0/0x960 fs/jfs/super.c:585 mount_bdev+0x264/0x358 fs/super.c:1400 jfs_do_mount+0x44/0x58 fs/jfs/super.c:675 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3014 path_mount+0x5b4/0x1000 fs/namespace.c:3344 do_mount fs/namespace.c:3357 [inline] __do_sys_mount fs/namespace.c:3565 [inline] __se_sys_mount fs/namespace.c:3542 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3542 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x1fc/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 ffff0000de122500 which belongs to the cache jfs_ip of size 2240 The buggy address is located 21 bytes to the right of 2240-byte region [ffff0000de122500, ffff0000de122dc0) The buggy address belongs to the page: page:0000000095bddf1b refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000de126f00 pfn:0x11e120 head:0000000095bddf1b order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000ce35e801 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c6906900 raw: ffff0000de126f00 00000000800d0001 00000001ffffffff ffff0000ce35e801 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000de122c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000de122d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000de122d80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff0000de122e00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff0000de122e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== find_entry called with index = 0 read_mapping_page failed! ERROR: (device loop4): txAbort: