EXT4-fs: inline encryption not supported
EXT4-fs (loop5): stripe (65535) is not aligned with cluster size (4096), stripe is disabled
[EXT4 FS bs=1024, gc=1, bpg=131072, ipg=32, mo=c80ce018, mo2=0000]
==================================================================
BUG: KCSAN: data-race in data_alloc / data_push_tail

write to 0xffffffff88e48e40 of 8 bytes by task 15808 on cpu 1:
 data_alloc+0x203/0x2b0 kernel/printk/printk_ringbuffer.c:1082
 prb_reserve+0x808/0xaf0 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x56d/0x860 kernel/printk/printk.c:2326
 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426
 vprintk_deferred kernel/printk/printk.c:4602 [inline]
 _printk_deferred+0x82/0xb0 kernel/printk/printk.c:4611
 ___ratelimit+0x4b1/0x4f0 lib/ratelimit.c:86
 __nla_validate_parse+0x15e8/0x1d00 lib/nlattr.c:647
 __nla_parse+0x40/0x60 lib/nlattr.c:732
 nla_parse_nested_deprecated include/net/netlink.h:1365 [inline]
 nfnl_cthelper_parse_expect_policy net/netfilter/nfnetlink_cthelper.c:180 [inline]
 nfnl_cthelper_create net/netfilter/nfnetlink_cthelper.c:236 [inline]
 nfnl_cthelper_new+0x386/0xf10 net/netfilter/nfnetlink_cthelper.c:458
 nfnetlink_rcv_msg+0x4c3/0x590 net/netfilter/nfnetlink.c:303
 netlink_rcv_skb+0x123/0x220 net/netlink/af_netlink.c:2534
 nfnetlink_rcv+0x16b/0x1690 net/netfilter/nfnetlink.c:668
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x59e/0x670 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x58b/0x6b0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x145/0x180 net/socket.c:727
 ____sys_sendmsg+0x31e/0x4e0 net/socket.c:2566
 ___sys_sendmsg+0x17b/0x1d0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0xd4/0x160 net/socket.c:2655
 x64_sys_call+0x2999/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff88e48e40 of 8 bytes by task 15798 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0xfd/0x420 kernel/printk/printk_ringbuffer.c:679
 data_alloc+0xbf/0x2b0 kernel/printk/printk_ringbuffer.c:1054
 prb_reserve+0x808/0xaf0 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x56d/0x860 kernel/printk/printk.c:2326
 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x79/0xa0 kernel/printk/printk.c:2475
 ext4_setup_super+0x572/0x580 fs/ext4/super.c:3103
 __ext4_fill_super fs/ext4/super.c:5522 [inline]
 ext4_fill_super+0x27d4/0x34e0 fs/ext4/super.c:5724
 get_tree_bdev_flags+0x291/0x300 fs/super.c:1681
 get_tree_bdev+0x1f/0x30 fs/super.c:1704
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5756
 vfs_get_tree+0x54/0x1d0 fs/super.c:1804
 do_new_mount+0x207/0x680 fs/namespace.c:3902
 path_mount+0x4a4/0xb20 fs/namespace.c:4226
 do_mount fs/namespace.c:4239 [inline]
 __do_sys_mount fs/namespace.c:4450 [inline]
 __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4427
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4427
 x64_sys_call+0xd36/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000ffffe611 -> 0x00000000fffff133

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 15798 Comm: syz.5.5289 Not tainted 6.16.0-rc4-syzkaller-00049-gb4911fb0b060 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
==================================================================
EXT4-fs error (device loop5): ext4_map_blocks:780: inode #3: block 2: comm syz.5.5289: lblock 2 mapped to illegal pblock 2 (length 1)
Quota error (device loop5): qtree_write_dquot: dquota write failed
EXT4-fs error (device loop5): ext4_map_blocks:780: inode #3: block 48: comm syz.5.5289: lblock 0 mapped to illegal pblock 48 (length 1)
Quota error (device loop5): v2_write_file_info: Can't write info structure
EXT4-fs error (device loop5): ext4_acquire_dquot:6933: comm syz.5.5289: Failed to acquire dquot type 0
EXT4-fs error (device loop5) in ext4_reserve_inode_write:6255: Corrupt filesystem
EXT4-fs error (device loop5): ext4_evict_inode:254: inode #11: comm syz.5.5289: mark_inode_dirty error
EXT4-fs warning (device loop5): ext4_evict_inode:257: couldn't mark inode dirty (err -117)
EXT4-fs (loop5): 1 orphan inode deleted
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs: Cannot change journaled quota options when quota turned on