loop4: detected capacity change from 0 to 131456 EXT4-fs (loop4): inodes count not valid: 318832672 vs 32 ================================================================== BUG: KCSAN: data-race in data_alloc / data_push_tail write to 0xffffffff86fdfc68 of 8 bytes by task 11299 on cpu 0: data_alloc+0x205/0x2b0 kernel/printk/printk_ringbuffer.c:1074 prb_reserve+0x931/0xc10 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x560/0xbb0 kernel/printk/printk.c:2199 vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2256 vprintk_default+0x22/0x30 kernel/printk/printk.c:2283 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50 _printk+0x76/0x97 kernel/printk/printk.c:2293 __ext4_msg+0x16d/0x180 fs/ext4/super.c:944 __ext4_fill_super+0x24d3/0x5a00 ext4_fill_super+0x10b/0x2f0 fs/ext4/super.c:5587 get_tree_bdev+0x2c2/0x3d0 fs/super.c:1292 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x11cf/0x1c40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3590 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3567 __x64_sys_mount+0x63/0x70 fs/namespace.c:3567 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffffffff86fdfc68 of 8 bytes by task 11294 on cpu 1: data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline] data_push_tail+0x138/0x470 kernel/printk/printk_ringbuffer.c:675 data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1046 prb_reserve+0x931/0xc10 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x560/0xbb0 kernel/printk/printk.c:2199 vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2256 vprintk_default+0x22/0x30 kernel/printk/printk.c:2283 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50 _printk+0x76/0x97 kernel/printk/printk.c:2293 __ext4_msg+0x16d/0x180 fs/ext4/super.c:944 __ext4_fill_super+0x24d3/0x5a00 ext4_fill_super+0x10b/0x2f0 fs/ext4/super.c:5587 get_tree_bdev+0x2c2/0x3d0 fs/super.c:1292 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x11cf/0x1c40 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3590 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3567 __x64_sys_mount+0x63/0x70 fs/namespace.c:3567 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000fffff94b -> 0x000000010000073e Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11294 Comm: syz-executor.4 Not tainted 5.17.0-syzkaller-11406-gf82da161ea75-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================