================================================================== BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:223 [inline] BUG: KASAN: slab-use-after-free in release_metapage+0xcde/0xdc0 fs/jfs/jfs_metapage.c:786 Read of size 8 at addr ffff88801aaec970 by task syz-executor.0/23452 CPU: 2 PID: 23452 Comm: syz-executor.0 Not tainted 6.8.0-rc4-syzkaller-00034-g8d3dea210042 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 drop_metapage fs/jfs/jfs_metapage.c:223 [inline] release_metapage+0xcde/0xdc0 fs/jfs/jfs_metapage.c:786 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_write+0x60c/0xd00 fs/jfs/xattr.c:280 ea_put fs/jfs/xattr.c:617 [inline] __jfs_setxattr+0xe86/0x1060 fs/jfs/xattr.c:783 __jfs_xattr_set+0xc6/0x150 fs/jfs/xattr.c:917 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:201 __vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:235 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:296 vfs_setxattr+0x146/0x350 fs/xattr.c:322 ovl_do_setxattr fs/overlayfs/overlayfs.h:311 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:323 [inline] ovl_verify_set_fh fs/overlayfs/namei.c:524 [inline] ovl_verify_set_fh+0x19c/0x240 fs/overlayfs/namei.c:516 ovl_verify_origin_xattr+0x7c/0x1a0 fs/overlayfs/namei.c:552 ovl_verify_upper fs/overlayfs/overlayfs.h:716 [inline] ovl_get_indexdir fs/overlayfs/super.c:880 [inline] ovl_fill_super+0x4921/0x6720 fs/overlayfs/super.c:1418 vfs_get_super fs/super.c:1273 [inline] get_tree_nodev+0xda/0x190 fs/super.c:1292 vfs_get_tree+0x8f/0x380 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14ea/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f6cd007dda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6cd0d780c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f6cd01abf80 RCX: 00007f6cd007dda9 RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f6cd00ca47a R08: 0000000020000380 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f6cd01abf80 R15: 00007ffd6ee379f8 Allocated by task 23452: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:314 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3813 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3867 mempool_alloc+0x176/0x390 mm/mempool.c:408 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline] __get_metapage+0x5f2/0x1170 fs/jfs/jfs_metapage.c:651 ea_write+0x72c/0xd00 fs/jfs/xattr.c:256 ea_put fs/jfs/xattr.c:617 [inline] __jfs_setxattr+0xe86/0x1060 fs/jfs/xattr.c:783 __jfs_xattr_set+0xc6/0x150 fs/jfs/xattr.c:917 __vfs_setxattr+0x173/0x1e0 fs/xattr.c:201 __vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:235 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:296 vfs_setxattr+0x146/0x350 fs/xattr.c:322 ovl_do_setxattr fs/overlayfs/overlayfs.h:311 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:323 [inline] ovl_verify_set_fh fs/overlayfs/namei.c:524 [inline] ovl_verify_set_fh+0x19c/0x240 fs/overlayfs/namei.c:516 ovl_verify_origin_xattr+0x7c/0x1a0 fs/overlayfs/namei.c:552 ovl_verify_upper fs/overlayfs/overlayfs.h:716 [inline] ovl_get_indexdir fs/overlayfs/super.c:880 [inline] ovl_fill_super+0x4921/0x6720 fs/overlayfs/super.c:1418 vfs_get_super fs/super.c:1273 [inline] get_tree_nodev+0xda/0x190 fs/super.c:1292 vfs_get_tree+0x8f/0x380 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14ea/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6f/0x77 Freed by task 43: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x121/0x1c0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kmem_cache_free+0x129/0x360 mm/slub.c:4363 mempool_free+0xe7/0x3b0 mm/mempool.c:554 free_metapage fs/jfs/jfs_metapage.c:191 [inline] metapage_release_folio+0x2d2/0x4e0 fs/jfs/jfs_metapage.c:551 filemap_release_folio+0x1f1/0x280 mm/filemap.c:4088 fallback_migrate_folio mm/migrate.c:934 [inline] move_to_new_folio+0x593/0x710 mm/migrate.c:978 migrate_folio_move mm/migrate.c:1284 [inline] migrate_pages_batch+0x1bbc/0x2c60 mm/migrate.c:1775 migrate_pages_sync mm/migrate.c:1841 [inline] migrate_pages+0x1b53/0x27f0 mm/migrate.c:1950 compact_zone+0x1dcb/0x3f90 mm/compaction.c:2554 proactive_compact_node+0x118/0x1d0 mm/compaction.c:2819 kcompactd+0x712/0xd80 mm/compaction.c:3135 kthread+0x2c6/0x3b0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 The buggy address belongs to the object at ffff88801aaec948 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff88801aaec948, ffff88801aaeca00) The buggy address belongs to the physical page: page:ffffea00006abb00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aaec head:ffffea00006abb00 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff88801aae7400 dead000000000100 dead000000000122 raw: 0000000000000000 00000000801f001f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 7800624628, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533 prep_new_page mm/page_alloc.c:1540 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2407 ___slab_alloc+0x4af/0x19a0 mm/slub.c:3540 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmem_cache_alloc+0x2ed/0x320 mm/slub.c:3867 mempool_init_node+0x31e/0x760 mm/mempool.c:217 mempool_create_node mm/mempool.c:286 [inline] mempool_create+0x7f/0xd0 mm/mempool.c:271 mempool_create_slab_pool include/linux/mempool.h:75 [inline] metapage_init+0x51/0x90 fs/jfs/jfs_metapage.c:204 init_jfs_fs+0x55/0x5c0 fs/jfs/super.c:945 do_one_initcall+0x11c/0x670 init/main.c:1236 do_initcall_level init/main.c:1298 [inline] do_initcalls init/main.c:1314 [inline] do_basic_setup init/main.c:1333 [inline] kernel_init_freeable+0x68d/0xc10 init/main.c:1551 kernel_init+0x1c/0x2a0 init/main.c:1441 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 page_owner free stack trace missing Memory state around the buggy address: ffff88801aaec800: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff88801aaec880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc >ffff88801aaec900: fc fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb ^ ffff88801aaec980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801aaeca00: fc fc fc fc fc fc fc fc fc fc fa fb fb fb fb fb ==================================================================