loop4: p242 size 520093696 extends beyond EOD, truncated
loop4: p243 size 108986237 extends beyond EOD, truncated
loop4: p244 size 520093696 extends beyond EOD, truncated
loop4: p245 size 108986237 extends beyond EOD, truncated
loop4: p246 size 520093696 extends beyond EOD, 
==================================================================
BUG: KCSAN: data-race in data_push_tail / number

write to 0xffffffff88bc382a of 1 bytes by task 6972 on cpu 0:
 number+0x7d0/0xa90 lib/vsprintf.c:564
 vsnprintf+0xa44/0xe30 lib/vsprintf.c:2869
 vscnprintf+0x42/0x90 lib/vsprintf.c:2909
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2197
 vprintk_store+0x570/0x810 kernel/printk/printk.c:2311
 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2383
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2422
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:68
 _printk+0x7a/0xa0 kernel/printk/printk.c:2432
 blk_add_partition block/partitions/core.c:541 [inline]
 blk_add_partitions block/partitions/core.c:625 [inline]
 bdev_disk_changed+0x87f/0xb90 block/partitions/core.c:685
 loop_reread_partitions drivers/block/loop.c:534 [inline]
 loop_set_status+0x4a5/0x540 drivers/block/loop.c:1303
 lo_ioctl+0x7f1/0x11c0
 blkdev_ioctl+0x359/0x450 block/ioctl.c:693
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xcd/0x140 fs/ioctl.c:893
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:893
 x64_sys_call+0x15cc/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff88bc3828 of 8 bytes by task 6801 on cpu 1:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679
 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1054
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2301
 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2383
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2422
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:68
 _printk+0x7a/0xa0 kernel/printk/printk.c:2432
 blk_add_partition block/partitions/core.c:541 [inline]
 blk_add_partitions block/partitions/core.c:625 [inline]
 bdev_disk_changed+0x87f/0xb90 block/partitions/core.c:685
 loop_reread_partitions drivers/block/loop.c:534 [inline]
 loop_set_status+0x4a5/0x540 drivers/block/loop.c:1303
 lo_ioctl+0x7f1/0x11c0
 blkdev_ioctl+0x359/0x450 block/ioctl.c:693
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xcd/0x140 fs/ioctl.c:893
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:893
 x64_sys_call+0x15cc/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000fffffe2c -> 0x7a69732038337020

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6801 Comm: syz.4.1303 Not tainted 6.11.0-syzkaller-11728-gad46e8f95e93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
==================================================================
truncated
loop4: p247 size 108986237 extends beyond EOD, 
truncated
loop4: p248 size 520093696 extends beyond EOD, 
truncated
loop4: p249 size 108986237 extends beyond EOD, 
truncated
loop4: p250 size 520093696 extends beyond EOD, 
truncated
loop4: p251 size 108986237 extends beyond EOD, 
truncated
loop4: p252 size 520093696 extends beyond EOD, 
truncated
loop4: p253 size 108986237 extends beyond EOD, 
truncated
loop4: p254 size 520093696 extends beyond EOD, 
truncated
loop4: p255 size 108986237 extends beyond EOD, 
truncated