EXT4-fs error (device loop2): ext4_xattr_ibody_get:619: inode #18: comm syz-executor.2: corrupted in-inode xattr ================================================================== BUG: KASAN: use-after-free in get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 Read of size 4 at addr ffff88811e0aa098 by task syz-executor.2/7849 CPU: 0 PID: 7849 Comm: syz-executor.2 Not tainted 6.1.25-syzkaller-00027-ga24911abfd55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350 get_max_inline_xattr_value_size+0x36e/0x510 fs/ext4/inline.c:62 ext4_get_max_inline_size+0x13d/0x1f0 fs/ext4/inline.c:113 ext4_try_to_write_inline_data+0xd3/0x1420 fs/ext4/inline.c:663 ext4_write_begin+0x200/0xfb0 fs/ext4/inode.c:1179 ext4_da_write_begin+0x2ff/0x920 fs/ext4/inode.c:2987 generic_perform_write+0x2f9/0x5c0 mm/filemap.c:3765 ext4_buffered_write_iter+0x360/0x640 fs/ext4/file.c:285 ext4_file_write_iter+0x194/0x1cf0 call_write_iter include/linux/fs.h:2215 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8d1/0xe80 fs/read_write.c:584 ksys_write+0x199/0x2c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f453ce7cb29 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:00007f453dba70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f453cf9bf80 RCX: 00007f453ce7cb29 RDX: 0000000000000001 RSI: 0000000020000280 RDI: 0000000000000004 RBP: 00007f453cec847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f453cf9bf80 R15: 00007ffccf84eb18 Allocated by task 7773: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:957 [inline] __kmalloc_node_track_caller+0xb3/0x1e0 mm/slab_common.c:977 kmemdup+0x29/0x60 mm/util.c:133 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] sidtab_sid2str_get+0x12b/0x2a0 security/selinux/ss/sidtab.c:615 sidtab_entry_to_string security/selinux/ss/services.c:1287 [inline] security_sid_to_context_core+0x2b5/0x490 security/selinux/ss/services.c:1380 security_sid_to_context_force+0x36/0x40 security/selinux/ss/services.c:1410 selinux_inode_init_security+0x6e6/0xad0 security/selinux/hooks.c:2906 security_inode_init_security+0x15b/0x390 security/security.c:1108 ext4_init_security+0x34/0x40 fs/ext4/xattr_security.c:58 __ext4_new_inode+0x337e/0x4240 fs/ext4/ialloc.c:1324 ext4_symlink+0x396/0xc00 fs/ext4/namei.c:3372 vfs_symlink+0x24e/0x3e0 fs/namei.c:4401 do_symlinkat+0x1ea/0x5a0 fs/namei.c:4430 __do_sys_symlinkat fs/namei.c:4447 [inline] __se_sys_symlinkat fs/namei.c:4444 [inline] __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4444 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 7773: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1744 [inline] slab_free_freelist_hook mm/slub.c:1770 [inline] slab_free mm/slub.c:3681 [inline] __kmem_cache_free+0x218/0x3b0 mm/slub.c:3694 kfree+0x7a/0xf0 mm/slab_common.c:1009 security_inode_init_security+0x2c0/0x390 security/security.c:1122 ext4_init_security+0x34/0x40 fs/ext4/xattr_security.c:58 __ext4_new_inode+0x337e/0x4240 fs/ext4/ialloc.c:1324 ext4_symlink+0x396/0xc00 fs/ext4/namei.c:3372 vfs_symlink+0x24e/0x3e0 fs/namei.c:4401 do_symlinkat+0x1ea/0x5a0 fs/namei.c:4430 __do_sys_symlinkat fs/namei.c:4447 [inline] __se_sys_symlinkat fs/namei.c:4444 [inline] __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4444 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88811e0aa080 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 24 bytes inside of 32-byte region [ffff88811e0aa080, ffff88811e0aa0a0) The buggy address belongs to the physical page: page:ffffea0004782a80 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88811e0aaa80 pfn:0x11e0aa flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004611f48 ffffea00046e59c8 ffff888100042600 raw: ffff88811e0aaa80 000000000040003d 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 512, tgid 512 (syz-executor.1), ts 224218400085, free_ts 224124138622 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2581 prep_new_page mm/page_alloc.c:2588 [inline] get_page_from_freelist+0x276c/0x2850 mm/page_alloc.c:4385 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5662 allocate_slab mm/slub.c:1959 [inline] new_slab+0xce/0x4c0 mm/slub.c:2012 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3200 __slab_alloc+0x5d/0xa0 mm/slub.c:3299 slab_alloc_node mm/slub.c:3384 [inline] __kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3457 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1047 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] ref_tracker_alloc+0x138/0x450 lib/ref_tracker.c:85 __netdev_tracker_alloc include/linux/netdevice.h:4059 [inline] netdev_tracker_alloc include/linux/netdevice.h:4071 [inline] fib6_nh_init+0x954/0x2180 net/ipv6/route.c:3621 ip6_route_info_create+0xa56/0x14c0 net/ipv6/route.c:3799 addrconf_f6i_alloc+0x215/0x4c0 net/ipv6/route.c:4548 fixup_permanent_addr net/ipv6/addrconf.c:3507 [inline] addrconf_permanent_addr+0x270/0xba0 net/ipv6/addrconf.c:3546 addrconf_notify+0x7c2/0xe10 net/ipv6/addrconf.c:3618 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0x8c/0xf0 kernel/notifier.c:455 __dev_notify_flags+0x304/0x610 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1493 [inline] free_pcp_prepare mm/page_alloc.c:1567 [inline] free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3484 free_unref_page+0x8d/0x480 mm/page_alloc.c:3580 free_the_page mm/page_alloc.c:793 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5751 __free_slab+0xce/0x1a0 mm/slub.c:2036 free_slab mm/slub.c:2051 [inline] discard_slab+0x29/0x40 mm/slub.c:2057 __slab_free+0x205/0x280 mm/slub.c:3594 do_slab_free mm/slub.c:3635 [inline] ___cache_free+0xc6/0xd0 mm/slub.c:3688 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:168 qlist_free_all+0x52/0xc0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3418 [inline] kmem_cache_alloc_node+0x18a/0x2d0 mm/slub.c:3463 __alloc_skb+0xcc/0x2c0 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1275 [inline] alloc_skb_with_frags+0xa6/0x680 net/core/skbuff.c:6128 sock_alloc_send_pskb+0x915/0xa50 net/core/sock.c:2727 Memory state around the buggy address: ffff88811e0a9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811e0aa000: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc >ffff88811e0aa080: fa fb fb fb fc fc fc fc 00 00 00 00 fc fc fc fc ^ ffff88811e0aa100: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff88811e0aa180: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ================================================================== EXT4-fs error (device loop2): ext4_read_block_bitmap_nowait:438: comm syz-executor.2: Invalid block bitmap block 4294967295 in block_group 0