================================================================== BUG: KASAN: use-after-free in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: use-after-free in dtReadFirst+0x3f0/0xa1c fs/jfs/jfs_dtree.c:3107 Read of size 4 at addr ffff0000f48b9910 by task syz.2.186/5498 CPU: 1 PID: 5498 Comm: syz.2.186 Not tainted 6.1.123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:427 kasan_report+0xd4/0x130 mm/kasan/report.c:531 __asan_report_load4_noabort+0x2c/0x38 mm/kasan/report_generic.c:350 addressPXD fs/jfs/jfs_types.h:80 [inline] dtReadFirst+0x3f0/0xa1c fs/jfs/jfs_dtree.c:3107 jfs_readdir+0x584/0x3030 fs/jfs/jfs_dtree.c:2820 iterate_dir+0x1f4/0x4ec __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 4684: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505 __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x74/0x458 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x1ac/0x2f8 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] jfs_alloc_inode+0x2c/0x68 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x68/0x1d0 fs/inode.c:1063 new_inode+0x38/0x174 fs/inode.c:1091 diReadSpecial+0x58/0x5a0 fs/jfs/jfs_imap.c:426 jfs_mount+0x88/0x7a8 fs/jfs/jfs_mount.c:87 jfs_fill_super+0x464/0x9f0 fs/jfs/super.c:556 mount_bdev+0x274/0x370 fs/super.c:1443 jfs_do_mount+0x44/0x58 fs/jfs/super.c:670 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632 vfs_get_tree+0x90/0x274 fs/super.c:1573 do_new_mount+0x278/0x8fc fs/namespace.c:3056 path_mount+0x590/0xe5c fs/namespace.c:3386 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount fs/namespace.c:3584 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3584 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xcc/0xe8 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 call_rcu+0xfc/0xa40 kernel/rcu/tree.c:2845 destroy_inode fs/inode.c:316 [inline] evict+0x7ac/0x894 fs/inode.c:720 iput_final fs/inode.c:1834 [inline] iput+0x7c0/0x8a4 fs/inode.c:1860 diFreeSpecial+0x78/0x108 fs/jfs/jfs_imap.c:552 jfs_umount+0x1ac/0x338 fs/jfs/jfs_umount.c:83 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x328 fs/super.c:501 kill_block_super+0x70/0xdc fs/super.c:1470 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 cleanup_mnt+0x394/0x41c fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x240/0x2f0 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2080/0x2cb8 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 The buggy address belongs to the object at ffff0000f48b9280 which belongs to the cache jfs_ip of size 2240 The buggy address is located 1680 bytes inside of 2240-byte region [ffff0000f48b9280, ffff0000f48b9b40) The buggy address belongs to the physical page: page:00000000a59c4422 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1348b8 head:00000000a59c4422 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff0000d83f6e01 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 0000000000000000 dead000000000122 ffff0000c4f6b500 raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff0000d83f6e01 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000f48b9800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f48b9880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000f48b9900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000f48b9980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000f48b9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== MetaData crosses page boundary!! lblock = 12ffff8000, size = 1291452416 CPU: 1 PID: 5498 Comm: syz.2.186 Tainted: G B 6.1.123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 __get_metapage+0xb48/0x1050 fs/jfs/jfs_metapage.c:596 dtReadFirst+0xc8/0xa1c fs/jfs/jfs_dtree.c:3066 jfs_readdir+0x584/0x3030 fs/jfs/jfs_dtree.c:2820 iterate_dir+0x1f4/0x4ec __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64 fs/readdir.c:354 [inline] __arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 bread failed!