================================================================== 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 ffff8880297bf6d8 by task syz-executor.1/15293 CPU: 0 PID: 15293 Comm: syz-executor.1 Not tainted 6.7.0-syzkaller-09928-g052d534373b7 #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_put fs/jfs/xattr.c:614 [inline] __jfs_setxattr+0xd08/0x1060 fs/jfs/xattr.c:783 jfs_initxattrs+0x1ba/0x280 fs/jfs/xattr.c:1016 security_inode_init_security+0x2db/0x3b0 security/security.c:1752 jfs_init_security+0x86/0xb0 fs/jfs/xattr.c:1028 jfs_mkdir+0x416/0xb30 fs/jfs/namei.c:240 vfs_mkdir+0x576/0x820 fs/namei.c:4122 do_mkdirat+0x2fd/0x3a0 fs/namei.c:4145 __do_sys_mkdir fs/namei.c:4165 [inline] __se_sys_mkdir fs/namei.c:4163 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4163 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7efecd27cda9 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:00007efece0090c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007efecd3abf80 RCX: 00007efecd27cda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 00007efecd2c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007efecd3abf80 R15: 00007ffc47265e28 Allocated by task 15293: kasan_save_stack+0x33/0x50 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+0x81/0x90 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+0x5ee/0x1170 fs/jfs/jfs_metapage.c:651 ea_get+0xda0/0x12c0 fs/jfs/xattr.c:526 __jfs_setxattr+0x1ed/0x1060 fs/jfs/xattr.c:718 jfs_initxattrs+0x1ba/0x280 fs/jfs/xattr.c:1016 security_inode_init_security+0x2db/0x3b0 security/security.c:1752 jfs_init_security+0x86/0xb0 fs/jfs/xattr.c:1028 jfs_mkdir+0x416/0xb30 fs/jfs/namei.c:240 vfs_mkdir+0x576/0x820 fs/namei.c:4122 do_mkdirat+0x2fd/0x3a0 fs/namei.c:4145 __do_sys_mkdir fs/namei.c:4165 [inline] __se_sys_mkdir fs/namei.c:4163 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:4163 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Freed by task 102: kasan_save_stack+0x33/0x50 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:634 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x121/0x1b0 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+0x129/0x350 mm/slub.c:4363 mempool_free+0xe7/0x3a0 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+0x1f1/0x270 mm/filemap.c:4086 shrink_folio_list+0x292c/0x3ea0 mm/vmscan.c:1369 evict_folios+0x6e7/0x1b90 mm/vmscan.c:4521 try_to_shrink_lruvec+0x638/0xa10 mm/vmscan.c:4726 shrink_one+0x3f4/0x7b0 mm/vmscan.c:4765 shrink_many mm/vmscan.c:4828 [inline] lru_gen_shrink_node mm/vmscan.c:4929 [inline] shrink_node+0x2149/0x3740 mm/vmscan.c:5888 kswapd_shrink_node mm/vmscan.c:6693 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883 kswapd+0x5be/0xbf0 mm/vmscan.c:7143 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 The buggy address belongs to the object at ffff8880297bf6b0 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff8880297bf6b0, ffff8880297bf768) The buggy address belongs to the physical page: page:ffffea0000a5ef80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x297be head:ffffea0000a5ef80 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888019f9cb40 0000000000000000 0000000000000001 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 0x1d2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5777, tgid 5775 (syz-executor.1), ts 227901935915, free_ts 227894480480 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d0/0x350 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+0x56/0xa0 mm/slub.c:3625 __slab_alloc_node mm/slub.c:3678 [inline] slab_alloc_node mm/slub.c:3850 [inline] kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3867 mempool_alloc+0x176/0x390 mm/mempool.c:408 alloc_metapage fs/jfs/jfs_metapage.c:176 [inline] __get_metapage+0x5ee/0x1170 fs/jfs/jfs_metapage.c:651 diReadSpecial+0x18d/0x6e0 fs/jfs/jfs_imap.c:444 jfs_mount+0xe0/0x890 fs/jfs/jfs_mount.c:87 jfs_fill_super+0x5a3/0xd20 fs/jfs/super.c:556 mount_bdev+0x1df/0x2d0 fs/super.c:1663 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8c/0x370 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 page last free pid 5780 tgid 5779 stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1140 [inline] free_unref_page_prepare+0x51f/0xb10 mm/page_alloc.c:2346 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486 __put_partials+0x14c/0x160 mm/slub.c:2922 qlink_free mm/kasan/quarantine.c:160 [inline] qlist_free_all+0x58/0x150 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:324 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 vm_area_alloc+0x1f/0x220 kernel/fork.c:465 mmap_region+0x3af/0x2aa0 mm/mmap.c:2804 do_mmap+0x893/0xef0 mm/mmap.c:1379 vm_mmap_pgoff+0x1a8/0x3c0 mm/util.c:556 ksys_mmap_pgoff+0x7d/0x5b0 mm/mmap.c:1425 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:86 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Memory state around the buggy address: ffff8880297bf580: fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb ffff8880297bf600: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880297bf680: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb ^ ffff8880297bf700: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff8880297bf780: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 ==================================================================