ERROR: (device loop3): release_metapage: metapage_write_one() failed ERROR: (device loop3): remounting filesystem as read-only ================================================================== 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+0x67c/0xa38 fs/jfs/jfs_metapage.c:784 Read of size 8 at addr ffff0000cff06028 by task syz.3.131/7317 CPU: 1 UID: 0 PID: 7317 Comm: syz.3.131 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0 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 lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x198/0x550 mm/kasan/report.c:521 kasan_report+0xd8/0x138 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+0x67c/0xa38 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_write+0x4fc/0xb88 fs/jfs/xattr.c:280 ea_put fs/jfs/xattr.c:621 [inline] __jfs_setxattr+0x9b4/0x137c fs/jfs/xattr.c:787 __jfs_set_acl+0x108/0x1a4 fs/jfs/acl.c:87 jfs_set_acl+0x20c/0x43c fs/jfs/acl.c:115 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x7a0/0xa24 fs/posix_acl.c:1133 do_set_acl+0xe4/0x1ac fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x2e4/0x3fc fs/xattr.c:665 path_setxattrat+0x370/0x41c fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __arm64_sys_lsetxattr+0xc0/0xdc fs/xattr.c:750 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Allocated by task 7317: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:562 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x74/0x8c mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x254/0x410 mm/slub.c:4171 mempool_alloc_slab+0x58/0x74 mm/mempool.c:559 mempool_alloc_noprof+0x150/0x48c mm/mempool.c:402 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline] __get_metapage+0x598/0x1370 fs/jfs/jfs_metapage.c:652 ea_write+0x48c/0xb88 fs/jfs/xattr.c:256 ea_put fs/jfs/xattr.c:621 [inline] __jfs_setxattr+0x9b4/0x137c fs/jfs/xattr.c:787 __jfs_set_acl+0x108/0x1a4 fs/jfs/acl.c:87 jfs_set_acl+0x20c/0x43c fs/jfs/acl.c:115 set_posix_acl fs/posix_acl.c:954 [inline] vfs_set_acl+0x7a0/0xa24 fs/posix_acl.c:1133 do_set_acl+0xe4/0x1ac fs/posix_acl.c:1278 do_setxattr fs/xattr.c:633 [inline] filename_setxattr+0x2e4/0x3fc fs/xattr.c:665 path_setxattrat+0x370/0x41c fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __arm64_sys_lsetxattr+0xc0/0xdc fs/xattr.c:750 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Freed by task 7345: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x64/0x8c mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x198/0x554 mm/slub.c:4711 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+0x388/0x4a0 fs/jfs/jfs_metapage.c:552 metapage_invalidate_folio+0x148/0x1c8 fs/jfs/jfs_metapage.c:564 folio_invalidate mm/truncate.c:126 [inline] truncate_cleanup_folio+0x260/0x40c mm/truncate.c:146 truncate_inode_pages_range+0x258/0xf28 mm/truncate.c:326 truncate_inode_pages+0x2c/0x3c mm/truncate.c:407 jfs_reconfigure+0x4c0/0x868 fs/jfs/super.c:406 reconfigure_super+0x1d0/0x6e8 fs/super.c:1083 vfs_cmd_reconfigure fs/fsopen.c:262 [inline] vfs_fsconfig_locked fs/fsopen.c:291 [inline] __do_sys_fsconfig fs/fsopen.c:467 [inline] __se_sys_fsconfig fs/fsopen.c:344 [inline] __arm64_sys_fsconfig+0x94c/0xc88 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 The buggy address belongs to the object at ffff0000cff06000 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff0000cff06000, ffff0000cff060b8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10ff06 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000000 ffff0000c4874780 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000cff05f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000cff05f80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc >ffff0000cff06000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000cff06080: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff0000cff06100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================