EXT4-fs (loop3): group descriptors corrupted!
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BUG: KCSAN: data-race in data_alloc / data_push_tail

write to 0xffffffff86dd7f50 of 8 bytes by task 15473 on cpu 0:
 data_alloc+0x205/0x2b0 kernel/printk/printk_ringbuffer.c:1071
 prb_reserve+0x920/0xbf0 kernel/printk/printk_ringbuffer.c:1549
 vprintk_store+0x560/0xbb0 kernel/printk/printk.c:2176
 vprintk_emit+0xac/0x3c0 kernel/printk/printk.c:2229
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2256
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x97 kernel/printk/printk.c:2266
 __ext4_warning+0x11b/0x130 fs/ext4/super.c:969
 ext4_multi_mount_protect+0xe7/0x540
 __ext4_fill_super+0x384a/0x59b0 fs/ext4/super.c:5103
 ext4_fill_super+0x10b/0x2f0 fs/ext4/super.c:5554
 get_tree_bdev+0x2c2/0x3d0 fs/super.c:1292
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 do_new_mount fs/namespace.c:3024 [inline]
 path_mount+0x11cf/0x1c40 fs/namespace.c:3354
 do_mount fs/namespace.c:3367 [inline]
 __do_sys_mount fs/namespace.c:3575 [inline]
 __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3552
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3552
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffffff86dd7f50 of 8 bytes by task 15471 on cpu 1:
 data_make_reusable kernel/printk/printk_ringbuffer.c:587 [inline]
 data_push_tail+0x138/0x470 kernel/printk/printk_ringbuffer.c:672
 data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1043
 prb_reserve+0x920/0xbf0 kernel/printk/printk_ringbuffer.c:1549
 vprintk_store+0x560/0xbb0 kernel/printk/printk.c:2176
 vprintk_emit+0xac/0x3c0 kernel/printk/printk.c:2229
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2256
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x97 kernel/printk/printk.c:2266
 __ext4_msg+0x16d/0x180 fs/ext4/super.c:944
 __ext4_fill_super+0x3457/0x59b0 fs/ext4/super.c:5036
 ext4_fill_super+0x10b/0x2f0 fs/ext4/super.c:5554
 get_tree_bdev+0x2c2/0x3d0 fs/super.c:1292
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 do_new_mount fs/namespace.c:3024 [inline]
 path_mount+0x11cf/0x1c40 fs/namespace.c:3354
 do_mount fs/namespace.c:3367 [inline]
 __do_sys_mount fs/namespace.c:3575 [inline]
 __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3552
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3552
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000000ffffebfd -> 0x00000000fffff8cf

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15471 Comm: syz-executor.3 Not tainted 5.17.0-rc7-syzkaller-00105-g1db333d9a51f-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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