loop1: p2 p3 p4 ================================================================== BUG: KCSAN: data-race in data_push_tail / string write to 0xffffffff86e5b150 of 1 bytes by task 11148 on cpu 0: string_nocheck lib/vsprintf.c:647 [inline] string+0x17b/0x220 lib/vsprintf.c:725 vsnprintf+0xb57/0xe80 lib/vsprintf.c:2782 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 check_partition block/partitions/core.c:159 [inline] blk_add_partitions block/partitions/core.c:600 [inline] bdev_disk_changed+0x9dd/0xc30 block/partitions/core.c:686 loop_reread_partitions drivers/block/loop.c:518 [inline] loop_set_status+0x44f/0x4f0 drivers/block/loop.c:1317 lo_ioctl+0x83e/0x1290 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856 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 0xffffffff86e5b150 of 8 bytes by task 1442 on cpu 1: 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 check_partition block/partitions/core.c:159 [inline] blk_add_partitions block/partitions/core.c:600 [inline] bdev_disk_changed+0x9dd/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: 0x000000010000afbe -> 0x000a347034702033 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1442 Comm: udevd Not tainted 5.19.0-rc5-syzkaller-00056-ge35e5b6f695d-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ================================================================== loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 218103808 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 218103808 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends 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 loop4: unable to read partition table loop4: partition table beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated 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 loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends 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 loop4: unable to read partition table loop4: partition table beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 301989888 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: 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 loop4: unable to read partition table loop4: partition table beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 620756992 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated 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 loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: 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 loop4: unable to read partition table loop4: partition table beyond EOD, truncated I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 1275068416 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated 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 loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 1811939328 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: unable to read partition table loop2: partition table beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 2298478592 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 p3 p4 loop2: p2 size 1073872896 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 p3 p4 loop2: p2 size 1073872896 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: unable to read partition table loop2: partition table beyond EOD, truncated loop2: p2 p3 p4 loop2: p2 size 1073872896 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 p3 p4 loop2: p2 size 1073872896 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop1: unable to read partition table loop1: partition table beyond EOD, truncated blk_print_req_error: 4 callbacks suppressed I/O error, dev loop2, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 buffer_io_error: 4 callbacks suppressed 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 loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop2: p2 p3 p4 loop2: p2 size 1073872896 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends 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 loop4: p2 < > p3 p4 loop4: p2 size 2 extends beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: p2 size 2 extends beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated 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 loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 33554432 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated 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 loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop2: p2 < > p3 p4 loop2: p2 size 2 extends beyond EOD, truncated loop2: p3 start 225 is beyond EOD, truncated loop2: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 2701131776 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: partition table partially beyond EOD, truncated loop4: p2 start 2701131776 is beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: partition table beyond EOD, truncated I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop4: p2 < > p3 p4 loop4: p2 size 2 extends beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated 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 loop4: p2 < > p3 p4 loop4: p2 size 2 extends beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: p2 size 2 extends beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends beyond EOD, truncated loop4: p2 < > p3 p4 loop4: p2 size 2 extends beyond EOD, truncated loop4: p3 start 225 is beyond EOD, truncated loop4: p4 size 3657465856 extends beyond EOD, truncated loop1: p2 p3 p4 loop1: p2 size 1073872896 extends beyond EOD, truncated loop1: p3 start 225 is beyond EOD, truncated loop1: p4 size 3657465856 extends 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 loop4: unable to read partition table loop4: partition table beyond EOD, truncated