loop4: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: use-after-free in addressPXD fs/jfs/jfs_types.h:80 [inline] BUG: KASAN: use-after-free in dtReadFirst+0x512/0xc40 fs/jfs/jfs_dtree.c:3107 Read of size 4 at addr ffff88805d1d8110 by task syz.4.1318/9858 CPU: 1 PID: 9858 Comm: syz.4.1318 Not tainted 6.1.128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:427 kasan_report+0x136/0x160 mm/kasan/report.c:531 addressPXD fs/jfs/jfs_types.h:80 [inline] dtReadFirst+0x512/0xc40 fs/jfs/jfs_dtree.c:3107 jfs_readdir+0x7da/0x3c30 fs/jfs/jfs_dtree.c:2820 iterate_dir+0x224/0x560 __do_sys_getdents fs/readdir.c:286 [inline] __se_sys_getdents+0x1eb/0x4c0 fs/readdir.c:271 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f18eab8cde9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f18eb9f0038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f18eada5fa0 RCX: 00007f18eab8cde9 RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000004 RBP: 00007f18eac0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f18eada5fa0 R15: 00007ffc017e8508 Allocated by task 7371: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] sysv_alloc_inode+0x24/0x40 fs/sysv/inode.c:309 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1c8/0x830 fs/inode.c:1373 sysv_iget+0x118/0x15a0 fs/sysv/inode.c:185 complete_read_super+0x45d/0x7e0 fs/sysv/super.c:339 sysv_fill_super+0x63e/0x790 fs/sysv/super.c:412 mount_bdev+0x2c9/0x3f0 fs/super.c:1443 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3056 do_mount fs/namespace.c:3399 [inline] __do_sys_mount fs/namespace.c:3607 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3584 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2845 destroy_inode fs/inode.c:316 [inline] evict+0x87d/0x930 fs/inode.c:720 __dentry_kill+0x436/0x650 fs/dcache.c:611 dentry_kill+0xbb/0x290 dput+0xfb/0x1d0 fs/dcache.c:918 shrink_dcache_for_umount+0x79/0x120 fs/dcache.c:1704 generic_shutdown_super+0x63/0x340 fs/super.c:473 kill_block_super+0x7a/0xe0 fs/super.c:1470 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805d1d8000 which belongs to the cache sysv_inode_cache of size 1224 The buggy address is located 272 bytes inside of 1224-byte region [ffff88805d1d8000, ffff88805d1d84c8) The buggy address belongs to the physical page: page:ffffea0001747600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805d1d8fd8 pfn:0x5d1d8 head:ffffea0001747600 order:2 compound_mapcount:0 compound_pincount:0 memcg:ffff8880570a9c01 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8881472a88c0 raw: ffff88805d1d8fd8 00000000800c0008 00000001ffffffff ffff8880570a9c01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x1d20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 7371, tgid 7363 (syz.4.694), ts 420396133086, free_ts 411671940414 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5605 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x1a5/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] sysv_alloc_inode+0x24/0x40 fs/sysv/inode.c:309 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1c8/0x830 fs/inode.c:1373 sysv_iget+0x118/0x15a0 fs/sysv/inode.c:185 complete_read_super+0x45d/0x7e0 fs/sysv/super.c:339 sysv_fill_super+0x63e/0x790 fs/sysv/super.c:412 mount_bdev+0x2c9/0x3f0 fs/super.c:1443 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x2ba/0xb40 fs/namespace.c:3056 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x137/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc+0xa1/0x230 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] tomoyo_realpath_from_path+0xcb/0x5d0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x21f/0x7f0 security/tomoyo/file.c:723 security_file_ioctl+0x6d/0xa0 security/security.c:1568 __do_sys_ioctl fs/ioctl.c:864 [inline] __se_sys_ioctl+0x47/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88805d1d8000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805d1d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805d1d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805d1d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805d1d8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================