I/O error, dev loop2, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
==================================================================
BUG: KCSAN: data-race in data_push_tail / string
write to 0xffffffff86e7e262 of 1 bytes by task 11288 on cpu 1:
string_nocheck lib/vsprintf.c:647 [inline]
string+0x17b/0x220 lib/vsprintf.c:725
vsnprintf+0xb57/0xe80 lib/vsprintf.c:2782
va_format lib/vsprintf.c:1680 [inline]
pointer+0x685/0x910 lib/vsprintf.c:2419
vsnprintf+0x905/0xe80 lib/vsprintf.c:2786
vscnprintf+0x3e/0x80 lib/vsprintf.c:2888
printk_sprint kernel/printk/printk.c:2092 [inline]
vprintk_store+0x5f2/0xb50 kernel/printk/printk.c:2206
vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2252
vprintk_default+0x22/0x30 kernel/printk/printk.c:2282
vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
_printk+0x76/0x96 kernel/printk/printk.c:2292
logfc+0x2bb/0x2d0
vfs_parse_fs_param+0x1cf/0x290 fs/fs_context.c:158
vfs_parse_fs_string+0x95/0xd0 fs/fs_context.c:184
shmem_parse_options+0x112/0x160 mm/shmem.c:3492
parse_monolithic_mount_data+0x3e/0x50 fs/fs_context.c:667
do_new_mount+0x1d3/0x650 fs/namespace.c:3036
path_mount+0x4b1/0xb60 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
__x64_sys_mount+0x63/0x70 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
read to 0xffffffff86e7e260 of 8 bytes by task 1442 on cpu 0:
data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline]
data_push_tail+0x10f/0x440 kernel/printk/printk_ringbuffer.c:675
data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1046
prb_reserve+0x897/0xbd0 kernel/printk/printk_ringbuffer.c:1555
vprintk_store+0x51c/0xb50 kernel/printk/printk.c:2196
vprintk_emit+0xcc/0x430 kernel/printk/printk.c:2252
vprintk_default+0x22/0x30 kernel/printk/printk.c:2282
vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
_printk+0x76/0x96 kernel/printk/printk.c:2292
blk_print_req_error+0x117/0x120 block/blk-mq.c:705
blk_update_request+0x776/0x840 block/blk-mq.c:802
blk_mq_end_request block/blk-mq.c:944 [inline]
blk_mq_try_issue_directly block/blk-mq.c:2539 [inline]
blk_mq_submit_bio+0xc29/0xe50 block/blk-mq.c:2850
__submit_bio block/blk-core.c:648 [inline]
__submit_bio_noacct_mq block/blk-core.c:725 [inline]
submit_bio_noacct_nocheck+0x83d/0xaa0 block/blk-core.c:742
submit_bio_noacct+0x690/0x7f0 block/blk-core.c:849
submit_bio+0xfb/0x110
submit_bh_wbc+0x2a8/0x2f0 fs/buffer.c:3039
submit_bh fs/buffer.c:3045 [inline]
block_read_full_folio+0x4d6/0x560 fs/buffer.c:2337
blkdev_read_folio+0x18/0x20 block/fops.c:377
do_read_cache_folio+0x20f/0x3a0 mm/filemap.c:3524
do_read_cache_page mm/filemap.c:3602 [inline]
read_cache_page+0x37/0x170 mm/filemap.c:3611
read_mapping_page include/linux/pagemap.h:759 [inline]
read_part_sector+0x78/0x2f0 block/partitions/core.c:715
read_lba block/partitions/efi.c:248 [inline]
find_valid_gpt+0x1e7/0xcb0 block/partitions/efi.c:603
efi_partition+0xba/0x6e0 block/partitions/efi.c:720
check_partition block/partitions/core.c:147 [inline]
blk_add_partitions block/partitions/core.c:600 [inline]
bdev_disk_changed+0x3c5/0xc30 block/partitions/core.c:686
blkdev_get_whole block/bdev.c:686 [inline]
blkdev_get_by_dev+0x3c0/0x9c0 block/bdev.c:823
blkdev_open+0xac/0x140 block/fops.c:481
do_dentry_open+0x521/0x850 fs/open.c:848
vfs_open+0x43/0x50 fs/open.c:981
do_open fs/namei.c:3520 [inline]
path_openat+0x16cf/0x1b30 fs/namei.c:3653
do_filp_open+0x105/0x220 fs/namei.c:3680
do_sys_openat2+0xb5/0x2a0 fs/open.c:1278
do_sys_open fs/open.c:1294 [inline]
__do_sys_openat fs/open.c:1310 [inline]
__se_sys_openat fs/open.c:1305 [inline]
__x64_sys_openat+0xef/0x110 fs/open.c:1305
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
value changed: 0x000000010000d200 -> 0x0000000100003301
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1442 Comm: udevd Not tainted 5.19.0-rc4-syzkaller-00036-gd9b2ba67917c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Buffer I/O error on dev loop2, logical block 0, async page read
loop2: unable to read partition table
loop2: partition table beyond EOD, truncated
I/O error, dev loop4, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop4, logical block 0, async page read
I/O error, dev loop4, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop4, logical block 0, async page read
loop4: unable to read partition table
I/O error, dev loop2, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop2, logical block 0, async page read
loop2: unable to read partition table
loop2: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
loop3: unable to read partition table
loop2: unable to read partition table
loop2: partition table beyond EOD, truncated
loop2: unable to read partition table
loop2: partition table beyond EOD, truncated
loop2: unable to read partition table
blk_print_req_error: 10 callbacks suppressed
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
buffer_io_error: 10 callbacks suppressed
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table
loop3: partition table beyond EOD, truncated
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
I/O error, dev loop3, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop3, logical block 0, async page read
loop3: unable to read partition table