EXT4-fs error (device loop1): ext4_readdir:260: inode #2: block 48: comm syz-executor: path /3/file0: bad entry in directory: rec_len is smaller than minimal - offset=980, inode=0, rec_len=0, size=1024 fake=0 ================================================================== BUG: KASAN: slab-use-after-free in ext4_read_inline_data fs/ext4/inline.c:209 [inline] BUG: KASAN: slab-use-after-free in ext4_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 Read of size 732 at addr ffff88805193b26d by task syz-executor/15804 CPU: 1 UID: 0 PID: 15804 Comm: syz-executor Not tainted 6.11.0-rc5-syzkaller-00176-g20371ba12063 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ext4_read_inline_data fs/ext4/inline.c:209 [inline] ext4_read_inline_dir+0x48b/0xdf0 fs/ext4/inline.c:1483 ext4_readdir+0x3bb/0x3500 fs/ext4/dir.c:158 iterate_dir+0x57a/0x810 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:407 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:392 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f24de3ac093 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 32 43 f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 RSP: 002b:00007fff27ffe5b8 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 0000555585946640 RCX: 00007f24de3ac093 RDX: 0000000000008000 RSI: 0000555585946640 RDI: 0000000000000006 RBP: 0000555585946614 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000016 R14: 0000555585946610 R15: 00007fff28001950 Allocated by task 16425: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4158 [inline] __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4177 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] nlmsg_new include/net/netlink.h:1015 [inline] audit_buffer_alloc kernel/audit.c:1794 [inline] audit_log_start+0x186/0xa30 kernel/audit.c:1912 common_lsm_audit+0xdd/0x1b30 security/lsm_audit.c:449 smack_log+0x421/0x540 security/smack/smack_access.c:383 smk_tskacc+0x300/0x370 security/smack/smack_access.c:253 smack_inode_permission+0x2dc/0x380 security/smack/smack_lsm.c:1234 security_inode_permission+0xa5/0x100 security/security.c:2216 may_lookup fs/namei.c:1761 [inline] link_path_walk+0x891/0xea0 fs/namei.c:2352 path_parentat fs/namei.c:2613 [inline] __filename_parentat+0x263/0x6f0 fs/namei.c:2637 filename_parentat fs/namei.c:2655 [inline] filename_create+0xf6/0x540 fs/namei.c:3960 do_mkdirat+0xbd/0x3a0 fs/namei.c:4225 __do_sys_mkdirat fs/namei.c:4248 [inline] __se_sys_mkdirat fs/namei.c:4246 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4246 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 29: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x149/0x360 mm/slub.c:4594 skb_kfree_head net/core/skbuff.c:1084 [inline] skb_free_head net/core/skbuff.c:1096 [inline] skb_release_data+0x676/0x880 net/core/skbuff.c:1123 skb_release_all net/core/skbuff.c:1188 [inline] __kfree_skb net/core/skbuff.c:1202 [inline] sk_skb_reason_drop+0x1a5/0x3d0 net/core/skbuff.c:1240 kauditd_send_queue+0x2b1/0x310 kernel/audit.c:766 kauditd_thread+0x74a/0x9b0 kernel/audit.c:890 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88805193b000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 621 bytes inside of freed 2048-byte region [ffff88805193b000, ffff88805193b800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x51938 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000040 ffff888015442000 ffffea0000af8200 dead000000000002 raw: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 00fff00000000040 ffff888015442000 ffffea0000af8200 dead000000000002 head: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000 head: 00fff00000000003 ffffea0001464e01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 12784, tgid 12784 (syz-executor), ts 815046118338, free_ts 803159917520 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2321 allocate_slab+0x5a/0x2f0 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4170 kmalloc_noprof include/linux/slab.h:685 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] ieee80211_register_hw+0x1d51/0x3e10 net/mac80211/main.c:1345 mac80211_hwsim_new_radio+0x2a9f/0x4a90 drivers/net/wireless/virtual/mac80211_hwsim.c:5519 hwsim_new_radio_nl+0xece/0x2290 drivers/net/wireless/virtual/mac80211_hwsim.c:6203 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 page last free pid 12862 tgid 12862 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2612 discard_slab mm/slub.c:2583 [inline] __put_partials+0xeb/0x130 mm/slub.c:3051 put_cpu_partial+0x17c/0x250 mm/slub.c:3126 __slab_free+0x2ea/0x3d0 mm/slub.c:4343 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044 getname_flags+0xb7/0x540 fs/namei.c:139 do_sys_openat2+0xd2/0x1d0 fs/open.c:1410 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1442 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88805193b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805193b180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805193b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805193b280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805193b300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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