loop0: detected capacity change from 0 to 14901 jfs_mount: diMount failed w/rc = -5 ================================================================== BUG: KASAN: slab-use-after-free in diFree+0x19eb/0x26b0 fs/jfs/jfs_imap.c:871 Read of size 4 at addr ffff88807d6a8004 by task syz-executor277/5068 CPU: 1 PID: 5068 Comm: syz-executor277 Not tainted 6.4.0-rc1-syzkaller-00071-g105131df9c3b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351 print_report mm/kasan/report.c:462 [inline] kasan_report+0x11c/0x130 mm/kasan/report.c:572 diFree+0x19eb/0x26b0 fs/jfs/jfs_imap.c:871 jfs_evict_inode+0x3de/0x4c0 fs/jfs/inode.c:156 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1747 [inline] iput.part.0+0x50a/0x740 fs/inode.c:1773 iput+0x5c/0x80 fs/inode.c:1763 diFreeSpecial+0x7b/0x110 fs/jfs/jfs_imap.c:548 jfs_mount+0x481/0x8b0 fs/jfs/jfs_mount.c:203 jfs_fill_super+0x5a8/0xd40 fs/jfs/super.c:556 mount_bdev+0x357/0x420 fs/super.c:1380 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x134b/0x1e40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7efc04c3590a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe5c0248f8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007efc04c3590a RDX: 0000000020002400 RSI: 0000000020000040 RDI: 00007ffe5c024910 RBP: 00007ffe5c024910 R08: 00007ffe5c024950 R09: 0000000000000002 R10: 0000000000000080 R11: 0000000000000282 R12: 0000000000000004 R13: 00005555572e42c0 R14: 0000000000000080 R15: 00007ffe5c024950 Allocated by task 5001: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] ____kasan_kmalloc mm/kasan/common.c:333 [inline] __kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0x5e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path2_perm+0x33e/0x6e0 security/tomoyo/file.c:923 tomoyo_path_rename+0x102/0x1b0 security/tomoyo/tomoyo.c:299 security_path_rename+0x121/0x230 security/security.c:1789 do_renameat2+0x47d/0xd40 fs/namei.c:4989 __do_sys_rename fs/namei.c:5048 [inline] __se_sys_rename fs/namei.c:5046 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:5046 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5001: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3786 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3799 tomoyo_realpath_from_path+0x190/0x600 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path2_perm+0x33e/0x6e0 security/tomoyo/file.c:923 tomoyo_path_rename+0x102/0x1b0 security/tomoyo/tomoyo.c:299 security_path_rename+0x121/0x230 security/security.c:1789 do_renameat2+0x47d/0xd40 fs/namei.c:4989 __do_sys_rename fs/namei.c:5048 [inline] __se_sys_rename fs/namei.c:5046 [inline] __x64_sys_rename+0x81/0xa0 fs/namei.c:5046 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807d6a8000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 4 bytes inside of freed 4096-byte region [ffff88807d6a8000, ffff88807d6a9000) The buggy address belongs to the physical page: page:ffffea0001f5aa00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7d6a8 head:ffffea0001f5aa00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012442140 ffffea0001f09a00 dead000000000002 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5004, tgid 5004 (syz-executor277), ts 44796132588, free_ts 44646108358 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731 prep_new_page mm/page_alloc.c:1738 [inline] get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x390 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3192 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291 __slab_alloc_node mm/slub.c:3344 [inline] slab_alloc_node mm/slub.c:3441 [inline] __kmem_cache_alloc_node+0x136/0x320 mm/slub.c:3490 __do_kmalloc_node mm/slab_common.c:965 [inline] __kmalloc+0x4e/0x190 mm/slab_common.c:979 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xc3/0x600 security/tomoyo/realpath.c:251 tomoyo_mount_acl+0x2d1/0x840 security/tomoyo/mount.c:141 tomoyo_mount_permission+0x166/0x410 security/tomoyo/mount.c:237 security_sb_mount+0x6a/0xc0 security/security.c:1360 path_mount+0x133/0x1e40 fs/namespace.c:3311 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1302 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564 free_unref_page+0x33/0x370 mm/page_alloc.c:2659 diUnmount+0xf1/0x130 fs/jfs/jfs_imap.c:195 jfs_mount+0x48e/0x8b0 fs/jfs/jfs_mount.c:205 jfs_fill_super+0x5a8/0xd40 fs/jfs/super.c:556 mount_bdev+0x357/0x420 fs/super.c:1380 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x134b/0x1e40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff88807d6a7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88807d6a7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88807d6a8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807d6a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807d6a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================