Hello, syzbot found the following issue on: HEAD commit: 17214b70a159 Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1123dba6c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=d40f6d44826f6cf7 dashboard link: https://syzkaller.appspot.com/bug?extid=db6caad9ebd2c8022b41 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d166fda7fbbd/disk-17214b70.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0c16461022b9/vmlinux-17214b70.xz kernel image: https://storage.googleapis.com/syzbot-assets/53e9e40da8bb/bzImage-17214b70.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+db6caad9ebd2c8022b41@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-use-after-free in ext4_read_inline_data fs/ext4/inline.c:199 [inline] BUG: KASAN: slab-use-after-free in ext4_convert_inline_data_nolock+0x31a/0xd80 fs/ext4/inline.c:1204 Read of size 20 at addr ffff888023fbe1a3 by task syz-executor.0/14243 CPU: 1 PID: 14243 Comm: syz-executor.0 Not tainted 6.3.0-rc3-syzkaller-00012-g17214b70a159 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ext4_read_inline_data fs/ext4/inline.c:199 [inline] ext4_convert_inline_data_nolock+0x31a/0xd80 fs/ext4/inline.c:1204 ext4_convert_inline_data+0x4da/0x620 fs/ext4/inline.c:2065 ext4_fallocate+0x14d/0x2050 fs/ext4/extents.c:4701 vfs_fallocate+0x54b/0x6b0 fs/open.c:324 ksys_fallocate fs/open.c:347 [inline] __do_sys_fallocate fs/open.c:355 [inline] __se_sys_fallocate fs/open.c:353 [inline] __x64_sys_fallocate+0xbd/0x100 fs/open.c:353 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f01bac8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f01bba76168 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f01badac050 RCX: 00007f01bac8c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f01bace7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc150e1a5f R14: 00007f01bba76300 R15: 0000000000022000 </TASK> Allocated by task 4435: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:196 [inline] __do_kmalloc_node mm/slab_common.c:967 [inline] __kmalloc+0xb9/0x230 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x254/0x4e0 security/tomoyo/file.c:771 security_file_open+0x63/0xa0 security/security.c:1719 do_dentry_open+0x308/0x10f0 fs/open.c:907 do_open fs/namei.c:3560 [inline] path_openat+0x27b3/0x3170 fs/namei.c:3715 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1375 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 4435: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook mm/slub.c:1807 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x264/0x3c0 mm/slub.c:3800 tomoyo_realpath_from_path+0x5a3/0x5e0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x254/0x4e0 security/tomoyo/file.c:771 security_file_open+0x63/0xa0 security/security.c:1719 do_dentry_open+0x308/0x10f0 fs/open.c:907 do_open fs/namei.c:3560 [inline] path_openat+0x27b3/0x3170 fs/namei.c:3715 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __x64_sys_openat+0x247/0x290 fs/open.c:1375 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888023fbe000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 419 bytes inside of freed 4096-byte region [ffff888023fbe000, ffff888023fbf000) The buggy address belongs to the physical page: page:ffffea00008fee00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23fb8 head:ffffea00008fee00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888012442140 ffffea0000835200 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6719, tgid 6717 (syz-executor.3), ts 223345556670, free_ts 223329495124 prep_new_page mm/page_alloc.c:2552 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4325 __alloc_pages+0x255/0x670 mm/page_alloc.c:5591 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3491 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1061 kmalloc include/linux/slab.h:580 [inline] kzalloc include/linux/slab.h:720 [inline] alloc_super+0x59/0x930 fs/super.c:202 sget_fc+0x222/0x630 fs/super.c:581 get_tree_bdev+0x26f/0x620 fs/super.c:1271 vfs_get_tree+0x8c/0x270 fs/super.c:1510 do_new_mount+0x28f/0xae0 fs/namespace.c:3042 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1453 [inline] free_pcp_prepare mm/page_alloc.c:1503 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3387 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3482 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476 getname_flags+0xbc/0x4e0 fs/namei.c:140 getname fs/namei.c:219 [inline] __do_sys_symlink fs/namei.c:4445 [inline] __se_sys_symlink fs/namei.c:4443 [inline] __x64_sys_symlink+0x5f/0x90 fs/namei.c:4443 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888023fbe080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888023fbe100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888023fbe180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888023fbe200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888023fbe280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This report is generated by a bot. 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