loop1: p135 size 50333440 extends beyond EOD, truncated loop1: p136 size 16777216 extends beyond EOD, truncated loop1: p137 size 50333440 extends beyond EOD, truncated ================================================================== BUG: KCSAN: data-race in data_alloc / prb_reserve write to 0xffffffff8607ded0 of 8 bytes by task 23862 on cpu 1: data_alloc+0x291/0x2c0 kernel/printk/printk_ringbuffer.c:1096 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2269 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2329 vprintk_default+0x26/0x30 kernel/printk/printk.c:2363 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2373 blk_add_partition block/partitions/core.c:541 [inline] blk_add_partitions block/partitions/core.c:626 [inline] bdev_disk_changed+0x888/0xbe0 block/partitions/core.c:686 loop_reread_partitions drivers/block/loop.c:514 [inline] loop_set_status+0x4ab/0x550 drivers/block/loop.c:1316 lo_ioctl+0x892/0x1330 blkdev_ioctl+0x37f/0x470 block/ioctl.c:641 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xd3/0x150 fs/ioctl.c:890 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:890 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x72/0x7a read to 0xffffffff8607ded0 of 8 bytes by task 23861 on cpu 0: desc_read kernel/printk/printk_ringbuffer.c:482 [inline] desc_push_tail kernel/printk/printk_ringbuffer.c:778 [inline] desc_reserve kernel/printk/printk_ringbuffer.c:924 [inline] prb_reserve+0x235/0xb60 kernel/printk/printk_ringbuffer.c:1619 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2269 vprintk_emit+0x10c/0x5e0 kernel/printk/printk.c:2329 vprintk_default+0x26/0x30 kernel/printk/printk.c:2363 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2373 blk_add_partition block/partitions/core.c:541 [inline] blk_add_partitions block/partitions/core.c:626 [inline] bdev_disk_changed+0x888/0xbe0 block/partitions/core.c:686 loop_reread_partitions drivers/block/loop.c:514 [inline] loop_set_status+0x4ab/0x550 drivers/block/loop.c:1316 lo_ioctl+0x892/0x1330 blkdev_ioctl+0x37f/0x470 block/ioctl.c:641 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xd3/0x150 fs/ioctl.c:890 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:890 do_syscall_64+0xd3/0x1d0 entry_SYSCALL_64_after_hwframe+0x72/0x7a value changed: 0x00000000000c6b90 -> 0x000000000017ddd8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 23861 Comm: syz-executor.1 Tainted: G W 6.9.0-rc2-syzkaller-00385-g104db052b62d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ================================================================== loop1: p138 size 16777216 extends beyond EOD, truncated loop1: p139 size 50333440 extends beyond EOD, truncated loop1: p140 size 16777216 extends beyond EOD, truncated loop1: p141 size 50333440 extends beyond EOD, truncated loop1: p142 size 16777216 extends beyond EOD, truncated loop1: p143 size 50333440 extends beyond EOD, truncated loop1: p144 size 16777216 extends beyond EOD, truncated loop1: p145 size 50333440 extends beyond EOD, truncated loop1: p146 size 16777216 extends beyond EOD, truncated loop1: p147 size 50333440 extends beyond EOD, truncated loop1: p148 size 16777216 extends beyond EOD, truncated loop1: p149 size 50333440 extends beyond EOD, truncated loop1: p150 size 16777216 extends beyond EOD, truncated loop1: p151 size 50333440 extends beyond EOD, truncated loop1: p152 size 16777216 extends beyond EOD, truncated loop1: p153 size 50333440 extends beyond EOD, truncated loop1: p154 size 16777216 extends beyond EOD, truncated loop1: p155 size 50333440 extends beyond EOD, truncated loop1: p156 size 16777216 extends beyond EOD, truncated loop1: p157 size 50333440 extends beyond EOD, truncated loop1: p158 size 16777216 extends beyond EOD, truncated loop1: p159 size 50333440 extends beyond EOD, truncated loop1: p160 size 16777216 extends beyond EOD, truncated loop1: p161 size 50333440 extends beyond EOD, truncated loop1: p162 size 16777216 extends beyond EOD, truncated loop1: p163 size 50333440 extends beyond EOD, truncated loop1: p164 size 16777216 extends beyond EOD, truncated loop1: p165 size 50333440 extends beyond EOD, truncated loop1: p166 size 16777216 extends beyond EOD, truncated loop1: p167 size 50333440 extends beyond EOD, truncated loop1: p168 size 16777216 extends beyond EOD, truncated loop1: p169 size 50333440 extends beyond EOD, truncated loop1: p170 size 16777216 extends beyond EOD, truncated loop1: p171 size 50333440 extends beyond EOD, truncated loop1: p172 size 16777216 extends beyond EOD, truncated loop1: p173 size 50333440 extends beyond EOD, truncated loop1: p174 size 16777216 extends beyond EOD, truncated loop1: p175 size 50333440 extends beyond EOD, truncated loop1: p176 size 16777216 extends beyond EOD, truncated loop1: p177 size 50333440 extends beyond EOD, truncated loop1: p178 size 16777216 extends beyond EOD, truncated loop1: p179 size 50333440 extends beyond EOD, truncated loop1: p180 size 16777216 extends beyond EOD, truncated loop1: p181 size 50333440 extends beyond EOD, truncated loop1: p182 size 16777216 extends beyond EOD, truncated loop1: p183 size 50333440 extends beyond EOD, truncated loop1: p184 size 16777216 extends beyond EOD, truncated loop1: p185 size 50333440 extends beyond EOD, truncated loop1: p186 size 16777216 extends beyond EOD, truncated loop1: p187 size 50333440 extends beyond EOD, truncated loop1: p188 size 16777216 extends beyond EOD, truncated loop1: p189 size 50333440 extends beyond EOD, truncated loop1: p190 size 16777216 extends beyond EOD, truncated loop1: p191 size 50333440 extends beyond EOD, truncated loop1: p192 size 16777216 extends beyond EOD, truncated loop1: p193 size 50333440 extends beyond EOD, truncated loop1: p194 size 16777216 extends beyond EOD, truncated loop1: p195 size 50333440 extends beyond EOD, truncated loop1: p196 size 16777216 extends beyond EOD, truncated loop1: p197 size 50333440 extends beyond EOD, truncated loop1: p198 size 16777216 extends beyond EOD, truncated loop1: p199 size 50333440 extends beyond EOD, truncated loop1: p200 size 16777216 extends beyond EOD, truncated loop1: p201 size 50333440 extends beyond EOD, truncated loop1: p202 size 16777216 extends beyond EOD, truncated loop1: p203 size 50333440 extends beyond EOD, truncated loop1: p204 size 16777216 extends beyond EOD, truncated loop1: p205 size 50333440 extends beyond EOD, truncated loop1: p206 size 16777216 extends beyond EOD, truncated loop1: p207 size 50333440 extends beyond EOD, truncated loop1: p208 size 16777216 extends beyond EOD, truncated loop1: p209 size 50333440 extends beyond EOD, truncated loop1: p210 size 16777216 extends beyond EOD, truncated loop1: p211 size 50333440 extends beyond EOD, truncated loop1: p212 size 16777216 extends beyond EOD, truncated loop1: p213 size 50333440 extends beyond EOD, truncated loop1: p214 size 16777216 extends beyond EOD, truncated loop1: p215 size 50333440 extends beyond EOD, truncated loop1: p216 size 16777216 extends beyond EOD, truncated loop1: p217 size 50333440 extends beyond EOD, truncated loop1: p218 size 16777216 extends beyond EOD, truncated loop1: p219 size 50333440 extends beyond EOD, truncated loop1: p220 size 16777216 extends beyond EOD, truncated loop1: p221 size 50333440 extends beyond EOD, truncated loop1: p222 size 16777216 extends beyond EOD, truncated loop1: p223 size 50333440 extends beyond EOD, truncated loop1: p224 size 16777216 extends beyond EOD, truncated loop1: p225 size 50333440 extends beyond EOD, truncated loop1: p226 size 16777216 extends beyond EOD, truncated loop1: p227 size 50333440 extends beyond EOD, truncated loop1: p228 size 16777216 extends beyond EOD, truncated loop1: p229 size 50333440 extends beyond EOD, truncated loop1: p230 size 16777216 extends beyond EOD, truncated loop1: p231 size 50333440 extends beyond EOD, truncated loop1: p232 size 16777216 extends beyond EOD, truncated loop1: p233 size 50333440 extends beyond EOD, truncated loop1: p234 size 16777216 extends beyond EOD, truncated loop1: p235 size 50333440 extends beyond EOD, truncated loop1: p236 size 16777216 extends beyond EOD, truncated loop1: p237 size 50333440 extends beyond EOD, truncated loop1: p238 size 16777216 extends beyond EOD, truncated loop1: p239 size 50333440 extends beyond EOD, truncated loop1: p240 size 16777216 extends beyond EOD, truncated loop1: p241 size 50333440 extends beyond EOD, truncated loop1: p242 size 16777216 extends beyond EOD, truncated loop1: p243 size 50333440 extends beyond EOD, truncated loop1: p244 size 16777216 extends beyond EOD, truncated loop1: p245 size 50333440 extends beyond EOD, truncated loop1: p246 size 16777216 extends beyond EOD, truncated loop1: p247 size 50333440 extends beyond EOD, truncated loop1: p248 size 16777216 extends beyond EOD, truncated loop1: p249 size 50333440 extends beyond EOD, truncated loop1: p250 size 16777216 extends beyond EOD, truncated loop1: p251 size 50333440 extends beyond EOD, truncated loop1: p252 size 16777216 extends beyond EOD, truncated loop1: p253 size 50333440 extends beyond EOD, truncated loop1: p254 size 16777216 extends beyond EOD, truncated loop1: p255 size 50333440 extends beyond EOD, truncated