Hello, syzbot found the following issue on: HEAD commit: da8e7da11e4b Merge tag 'nfsd-6.3-4' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15fc9af5c80000 kernel config: https://syzkaller.appspot.com/x/.config?x=acdb62bf488a8fe5 dashboard link: https://syzkaller.appspot.com/bug?extid=ba4fa9ce904fefb787d3 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/62e9c5f4bead/disk-da8e7da1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c11aa933e2a7/vmlinux-da8e7da1.xz kernel image: https://storage.googleapis.com/syzbot-assets/7a21bdd49c84/bzImage-da8e7da1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ba4fa9ce904fefb787d3@xxxxxxxxxxxxxxxxxxxxxxxxx EXT4-fs error (device loop1): __ext4_get_inode_loc:4560: comm syz-executor.1: Invalid inode table block 8387954787021251444 in block_group 0 ================================================================== BUG: KASAN: slab-out-of-bounds in ext4_write_inline_data fs/ext4/inline.c:248 [inline] BUG: KASAN: slab-out-of-bounds in ext4_write_inline_data_end+0x5b4/0x10e0 fs/ext4/inline.c:766 Write of size 1 at addr ffff88802cc1f9ae by task syz-executor.1/23455 CPU: 1 PID: 23455 Comm: syz-executor.1 Not tainted 6.3.0-rc3-syzkaller-00338-gda8e7da11e4b #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+0x40/0x70 mm/kasan/shadow.c:106 ext4_write_inline_data fs/ext4/inline.c:248 [inline] ext4_write_inline_data_end+0x5b4/0x10e0 fs/ext4/inline.c:766 generic_perform_write+0x3ed/0x5e0 mm/filemap.c:3937 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:289 ext4_file_write_iter+0x1d6/0x1930 do_iter_write+0x6ea/0xc50 fs/read_write.c:861 iter_file_splice_write+0x843/0xfe0 fs/splice.c:778 do_splice_from fs/splice.c:856 [inline] direct_splice_actor+0xe7/0x1c0 fs/splice.c:1022 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:977 do_splice_direct+0x283/0x3d0 fs/splice.c:1065 do_sendfile+0x620/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309 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: 0033:0x7f14b828c0f9 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:00007f14b8fd4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f14b83abf80 RCX: 00007f14b828c0f9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f14b82e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000001ffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff8d44f2ff R14: 00007f14b8fd4300 R15: 0000000000022000 </TASK> Allocated by task 2: 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] kzalloc include/linux/slab.h:720 [inline] lsm_cred_alloc security/security.c:568 [inline] security_prepare_creds+0x4c/0x140 security/security.c:1781 prepare_creds+0x458/0x630 kernel/cred.c:291 copy_creds+0x14a/0xca0 kernel/cred.c:365 copy_process+0x94a/0x3fc0 kernel/fork.c:2124 kernel_clone+0x222/0x800 kernel/fork.c:2679 kernel_thread+0x156/0x1d0 kernel/fork.c:2739 create_kthread kernel/kthread.c:399 [inline] kthreadd+0x583/0x750 kernel/kthread.c:746 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 The buggy address belongs to the object at ffff88802cc1f800 which belongs to the cache kmalloc-cg-256 of size 256 The buggy address is located 230 bytes to the right of allocated 200-byte region [ffff88802cc1f800, ffff88802cc1f8c8) The buggy address belongs to the physical page: page:ffffea0000b30780 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802cc1f400 pfn:0x2cc1e head:ffffea0000b30780 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802fa51901 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff88801244f000 ffff88801244e4c8 ffffea0000940d90 raw: ffff88802cc1f400 0000000000100004 00000001ffffffff ffff88802fa51901 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 4381, tgid 4381 (kworker/u4:5), ts 11572064611, free_ts 0 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 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 __do_kmalloc_node mm/slab_common.c:966 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:980 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] lsm_cred_alloc security/security.c:568 [inline] security_prepare_creds+0x4c/0x140 security/security.c:1781 prepare_creds+0x458/0x630 kernel/cred.c:291 prepare_exec_creds+0x18/0x270 kernel/cred.c:311 prepare_bprm_creds fs/exec.c:1477 [inline] bprm_execve+0xff/0x1740 fs/exec.c:1815 kernel_execve+0x8ea/0xa10 fs/exec.c:2020 call_usermodehelper_exec_async+0x233/0x370 kernel/umh.c:110 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 page_owner free stack trace missing Memory state around the buggy address: ffff88802cc1f880: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff88802cc1f900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88802cc1f980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88802cc1fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802cc1fa80: 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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