ERROR: (device loop0): txAbort: ERROR: (device loop0): remounting filesystem as read-only ================================================================== BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:311 [inline] BUG: KASAN: slab-use-after-free in release_metapage+0x680/0xa3c fs/jfs/jfs_metapage.c:890 Read of size 8 at addr ffff0000d6cd6cc0 by task syz.0.78/7084 CPU: 1 UID: 0 PID: 7084 Comm: syz.0.78 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (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:311 [inline] release_metapage+0x680/0xa3c fs/jfs/jfs_metapage.c:890 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:4375 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4408 __do_sys_mkdirat fs/namei.c:4425 [inline] __se_sys_mkdirat fs/namei.c:4423 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4423 __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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Allocated by task 7084: 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:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4204 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:264 [inline] __get_metapage+0x528/0xe8c fs/jfs/jfs_metapage.c:758 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:4375 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4408 __do_sys_mkdirat fs/namei.c:4425 [inline] __se_sys_mkdirat fs/namei.c:4423 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4423 __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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Freed by task 7114: 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:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x184/0x550 mm/slub.c:4745 mempool_free_slab+0x28/0x38 mm/mempool.c:566 mempool_free+0xbc/0x2e8 mm/mempool.c:548 free_metapage fs/jfs/jfs_metapage.c:279 [inline] metapage_release_folio+0x374/0x48c fs/jfs/jfs_metapage.c:634 metapage_invalidate_folio+0x14c/0x1cc fs/jfs/jfs_metapage.c:669 folio_invalidate mm/truncate.c:140 [inline] truncate_cleanup_folio+0x264/0x3a0 mm/truncate.c:160 truncate_inode_pages_range+0x1f4/0xe18 mm/truncate.c:379 truncate_inode_pages+0x2c/0x3c mm/truncate.c:460 jfs_reconfigure+0x474/0x824 fs/jfs/super.c:406 reconfigure_super+0x1d4/0x6f0 fs/super.c:1077 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the object at ffff0000d6cd6c98 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff0000d6cd6c98, ffff0000d6cd6d50) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x116cd6 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000000 ffff0000c47c7780 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d6cd6b80: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d6cd6c00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc >ffff0000d6cd6c80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000d6cd6d00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff0000d6cd6d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================