Message-ID: <000000000000d39fe305ff5a928f@google.com>
Date:   Fri, 30 Jun 2023 08:35:58 -0700
From:   syzbot <syzbot+4cdfeccf2cf6f8ab36a4@...kaller.appspotmail.com>
To:     bpf@...r.kernel.org, eparis@...isplace.org, gpiccoli@...lia.com,
        keescook@...omium.org, linux-fsdevel@...r.kernel.org,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        paul@...l-moore.com, reiserfs-devel@...r.kernel.org,
        selinux@...r.kernel.org, stephen.smalley.work@...il.com,
        syzkaller-bugs@...glegroups.com, tony.luck@...el.com
Subject: [syzbot] [selinux?] [reiserfs?] KASAN: wild-memory-access Read in inode_doinit_with_dentry

Hello,

syzbot found the following issue on:

HEAD commit:    6995e2de6891 Linux 6.4
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17d58757280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=9536c93ce7915e58
dashboard link: https://syzkaller.appspot.com/bug?extid=4cdfeccf2cf6f8ab36a4
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13b33b57280000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-6995e2de.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/95b0ee5a267d/vmlinux-6995e2de.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0e7c613d4a73/bzImage-6995e2de.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/86bf2b608923/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4cdfeccf2cf6f8ab36a4@...kaller.appspotmail.com

==================================================================
BUG: KASAN: wild-memory-access in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: wild-memory-access in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: wild-memory-access in __lock_acquire+0xf3d/0x5f30 kernel/locking/lockdep.c:5058
Read of size 8 at addr 1fffffff86b9d550 by task syz-executor.2/5155

CPU: 3 PID: 5155 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_report mm/kasan/report.c:465 [inline]
 kasan_report+0xec/0x130 mm/kasan/report.c:572
 check_region_inline mm/kasan/generic.c:181 [inline]
 kasan_check_range+0x141/0x190 mm/kasan/generic.c:187
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 __lock_acquire+0xf3d/0x5f30 kernel/locking/lockdep.c:5058
 lock_acquire kernel/locking/lockdep.c:5705 [inline]
 lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:350 [inline]
 inode_doinit_with_dentry+0x1026/0x12d0 security/selinux/hooks.c:1510
 selinux_d_instantiate+0x27/0x30 security/selinux/hooks.c:6225
 security_d_instantiate+0x54/0xe0 security/security.c:3760
 d_instantiate fs/dcache.c:2034 [inline]
 d_instantiate+0x5e/0xa0 fs/dcache.c:2030
 __debugfs_create_file+0x20f/0x5e0 fs/debugfs/inode.c:445
 debugfs_hw_add+0x28b/0x370 net/mac80211/debugfs.c:670
 ieee80211_register_hw+0x23e3/0x40e0 net/mac80211/main.c:1395
 mac80211_hwsim_new_radio+0x26c1/0x4c10 drivers/net/wireless/virtual/mac80211_hwsim.c:5294
 hwsim_new_radio_nl+0xacf/0x1210 drivers/net/wireless/virtual/mac80211_hwsim.c:5974
 genl_family_rcv_msg_doit.isra.0+0x1e6/0x2d0 net/netlink/genetlink.c:968
 genl_family_rcv_msg net/netlink/genetlink.c:1048 [inline]
 genl_rcv_msg+0x4ff/0x7e0 net/netlink/genetlink.c:1065
 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2546
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 __sys_sendto+0x23a/0x340 net/socket.c:2144
 __do_sys_sendto net/socket.c:2156 [inline]
 __se_sys_sendto net/socket.c:2152 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2152
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f717603e2ac
Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
RSP: 002b:00007ffe75814790 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f7176cd4620 RCX: 00007f717603e2ac
RDX: 0000000000000024 RSI: 00007f7176cd4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe758147e4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f7176cd4670 R14: 0000000000000003 R15: 0000000000000000
 </TASK>
==================================================================


---
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