loop6: p52 start 4293394690 is beyond EOD, truncated loop6: p53 start 51379968 is beyond EOD, truncated loop6: p54 start 4293394690 is beyond EOD, truncated ================================================================== BUG: KCSAN: data-race in data_alloc / prb_reserve write to 0xffffffff86c7e370 of 8 bytes by task 28 on cpu 1: data_alloc+0x308/0x380 kernel/printk/printk_ringbuffer.c:1130 prb_reserve+0x8e3/0xaf0 kernel/printk/printk_ringbuffer.c:1727 vprintk_store+0x54a/0x910 kernel/printk/printk.c:2354 vprintk_emit+0x1a4/0x600 kernel/printk/printk.c:2455 vprintk_default+0x26/0x30 kernel/printk/printk.c:2494 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2504 kauditd_printk_skb kernel/audit.c:587 [inline] kauditd_hold_skb+0x1b1/0x1c0 kernel/audit.c:622 kauditd_send_queue+0x275/0x2d0 kernel/audit.c:807 kauditd_thread+0x439/0x660 kernel/audit.c:931 kthread+0x221/0x270 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read to 0xffffffff86c7e370 of 8 bytes by task 14883 on cpu 0: desc_read kernel/printk/printk_ringbuffer.c:496 [inline] desc_push_tail kernel/printk/printk_ringbuffer.c:792 [inline] desc_reserve kernel/printk/printk_ringbuffer.c:938 [inline] prb_reserve+0x21a/0xaf0 kernel/printk/printk_ringbuffer.c:1677 vprintk_store+0x54a/0x910 kernel/printk/printk.c:2354 vprintk_emit+0x1a4/0x600 kernel/printk/printk.c:2455 vprintk_default+0x26/0x30 kernel/printk/printk.c:2494 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x79/0xa0 kernel/printk/printk.c:2504 blk_add_partition block/partitions/core.c:542 [inline] blk_add_partitions block/partitions/core.c:635 [inline] bdev_disk_changed+0x98f/0xe20 block/partitions/core.c:695 loop_reread_partitions drivers/block/loop.c:447 [inline] loop_set_status+0x5af/0x670 drivers/block/loop.c:1276 loop_set_status64 drivers/block/loop.c:1372 [inline] lo_ioctl+0x66d/0x1390 drivers/block/loop.c:1558 blkdev_ioctl+0x387/0x460 block/ioctl.c:797 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583 x64_sys_call+0x1563/0x3020 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000000001b8d8 -> 0x00000000000bba08 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 14883 Comm: syz.6.3280 Tainted: G W syzkaller #0 PREEMPT(lazy) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 ================================================================== loop6: p55 start 51379968 is beyond EOD, truncated loop6: p56 start 4293394690 is beyond EOD, truncated loop6: p57 start 51379968 is beyond EOD, truncated loop6: p58 start 4293394690 is beyond EOD, truncated loop6: p59 start 51379968 is beyond EOD, truncated loop6: p60 start 4293394690 is beyond EOD, truncated loop6: p61 start 51379968 is beyond EOD, truncated loop6: p62 start 4293394690 is beyond EOD, truncated loop6: p63 start 51379968 is beyond EOD, truncated loop6: p64 start 4293394690 is beyond EOD, truncated loop6: p65 start 51379968 is beyond EOD, truncated loop6: p66 start 4293394690 is beyond EOD, truncated loop6: p67 start 51379968 is beyond EOD, truncated loop6: p68 start 4293394690 is beyond EOD, truncated loop6: p69 start 51379968 is beyond EOD, truncated loop6: p70 start 4293394690 is beyond EOD, truncated loop6: p71 start 51379968 is beyond EOD, truncated loop6: p72 start 4293394690 is beyond EOD, truncated loop6: p73 start 51379968 is beyond EOD, truncated loop6: p74 start 4293394690 is beyond EOD, truncated loop6: p75 start 51379968 is beyond EOD, truncated loop6: p76 start 4293394690 is beyond EOD, truncated loop6: p77 start 51379968 is beyond EOD, truncated loop6: p78 start 4293394690 is beyond EOD, truncated loop6: p79 start 51379968 is beyond EOD, truncated loop6: p80 start 4293394690 is beyond EOD, truncated loop6: p81 start 51379968 is beyond EOD, truncated loop6: p82 start 4293394690 is beyond EOD, truncated loop6: p83 start 51379968 is beyond EOD, truncated loop6: p84 start 4293394690 is beyond EOD, truncated loop6: p85 start 51379968 is beyond EOD, truncated loop6: p86 start 4293394690 is beyond EOD, truncated loop6: p87 start 51379968 is beyond EOD, truncated loop6: p88 start 4293394690 is beyond EOD, truncated loop6: p89 start 51379968 is beyond EOD, truncated loop6: p90 start 4293394690 is beyond EOD, truncated loop6: p91 start 51379968 is beyond EOD, truncated loop6: p92 start 4293394690 is beyond EOD, truncated loop6: p93 start 51379968 is beyond EOD, truncated loop6: p94 start 4293394690 is beyond EOD, truncated loop6: p95 start 51379968 is beyond EOD, truncated loop6: p96 start 4293394690 is beyond EOD, truncated loop6: p97 start 51379968 is beyond EOD, truncated loop6: p98 start 4293394690 is beyond EOD, truncated loop6: p99 start 51379968 is beyond EOD, truncated loop6: p100 start 4293394690 is beyond EOD, truncated loop6: p101 start 51379968 is beyond EOD, truncated loop6: p102 start 4293394690 is beyond EOD, truncated loop6: p103 start 51379968 is beyond EOD, truncated loop6: p104 start 4293394690 is beyond EOD, truncated loop6: p105 start 51379968 is beyond EOD, truncated loop6: p106 start 4293394690 is beyond EOD, truncated loop6: p107 start 51379968 is beyond EOD, truncated loop6: p108 start 4293394690 is beyond EOD, truncated loop6: p109 start 51379968 is beyond EOD, truncated loop6: p110 start 4293394690 is beyond EOD, truncated loop6: p111 start 51379968 is beyond EOD, truncated loop6: p112 start 4293394690 is beyond EOD, truncated loop6: p113 start 51379968 is beyond EOD, truncated loop6: p114 start 4293394690 is beyond EOD, truncated loop6: p115 start 51379968 is beyond EOD, truncated loop6: p116 start 4293394690 is beyond EOD, truncated loop6: p117 start 51379968 is beyond EOD, truncated loop6: p118 start 4293394690 is beyond EOD, truncated loop6: p119 start 51379968 is beyond EOD, truncated loop6: p120 start 4293394690 is beyond EOD, truncated loop6: p121 start 51379968 is beyond EOD, truncated loop6: p122 start 4293394690 is beyond EOD, truncated loop6: p123 start 51379968 is beyond EOD, truncated loop6: p124 start 4293394690 is beyond EOD, truncated loop6: p125 start 51379968 is beyond EOD, truncated loop6: p126 start 4293394690 is beyond EOD, truncated loop6: p127 start 51379968 is beyond EOD, truncated loop6: p128 start 4293394690 is beyond EOD, truncated loop6: p129 start 51379968 is beyond EOD, truncated loop6: p130 start 4293394690 is beyond EOD, truncated loop6: p131 start 51379968 is beyond EOD, truncated loop6: p132 start 4293394690 is beyond EOD, truncated loop6: p133 start 51379968 is beyond EOD, truncated loop6: p134 start 4293394690 is beyond EOD, truncated loop6: p135 start 51379968 is beyond EOD, truncated loop6: p136 start 4293394690 is beyond EOD, truncated loop6: p137 start 51379968 is beyond EOD, truncated loop6: p138 start 4293394690 is beyond EOD, truncated loop6: p139 start 51379968 is beyond EOD, truncated loop6: p140 start 4293394690 is beyond EOD, truncated loop6: p141 start 51379968 is beyond EOD, truncated loop6: p142 start 4293394690 is beyond EOD, truncated loop6: p143 start 51379968 is beyond EOD, truncated loop6: p144 start 4293394690 is beyond EOD, truncated loop6: p145 start 51379968 is beyond EOD, truncated loop6: p146 start 4293394690 is beyond EOD, truncated loop6: p147 start 51379968 is beyond EOD, truncated loop6: p148 start 4293394690 is beyond EOD, truncated loop6: p149 start 51379968 is beyond EOD, truncated loop6: p150 start 4293394690 is beyond EOD, truncated loop6: p151 start 51379968 is beyond EOD, truncated loop6: p152 start 4293394690 is beyond EOD, truncated loop6: p153 start 51379968 is beyond EOD, truncated loop6: p154 start 4293394690 is beyond EOD, truncated loop6: p155 start 51379968 is beyond EOD, truncated loop6: p156 start 4293394690 is beyond EOD, truncated loop6: p157 start 51379968 is beyond EOD, truncated loop6: p158 start 4293394690 is beyond EOD, truncated loop6: p159 start 51379968 is beyond EOD, truncated loop6: p160 start 4293394690 is beyond EOD, truncated loop6: p161 start 51379968 is beyond EOD, truncated loop6: p162 start 4293394690 is beyond EOD, truncated loop6: p163 start 51379968 is beyond EOD, truncated loop6: p164 start 4293394690 is beyond EOD, truncated loop6: p165 start 51379968 is beyond EOD, truncated loop6: p166 start 4293394690 is beyond EOD, truncated loop6: p167 start 51379968 is beyond EOD, truncated loop6: p168 start 4293394690 is beyond EOD, truncated loop6: p169 start 51379968 is beyond EOD, truncated loop6: p170 start 4293394690 is beyond EOD, truncated loop6: p171 start 51379968 is beyond EOD, truncated loop6: p172 start 4293394690 is beyond EOD, truncated loop6: p173 start 51379968 is beyond EOD, truncated loop6: p174 start 4293394690 is beyond EOD, truncated loop6: p175 start 51379968 is beyond EOD, truncated loop6: p176 start 4293394690 is beyond EOD, truncated loop6: p177 start 51379968 is beyond EOD, truncated loop6: p178 start 4293394690 is beyond EOD, truncated loop6: p179 start 51379968 is beyond EOD, truncated loop6: p180 start 4293394690 is beyond EOD, truncated loop6: p181 start 51379968 is beyond EOD, truncated loop6: p182 start 4293394690 is beyond EOD, truncated loop6: p183 start 51379968 is beyond EOD, truncated loop6: p184 start 4293394690 is beyond EOD, truncated loop6: p185 start 51379968 is beyond EOD, truncated loop6: p186 start 4293394690 is beyond EOD, truncated loop6: p187 start 51379968 is beyond EOD, truncated loop6: p188 start 4293394690 is beyond EOD, truncated loop6: p189 start 51379968 is beyond EOD, truncated loop6: p190 start 4293394690 is beyond EOD, truncated loop6: p191 start 51379968 is beyond EOD, truncated loop6: p192 start 4293394690 is beyond EOD, truncated loop6: p193 start 51379968 is beyond EOD, truncated loop6: p194 start 4293394690 is beyond EOD, truncated loop6: p195 start 51379968 is beyond EOD, truncated loop6: p196 start 4293394690 is beyond EOD, truncated loop6: p197 start 51379968 is beyond EOD, truncated loop6: p198 start 4293394690 is beyond EOD, truncated loop6: p199 start 51379968 is beyond EOD, truncated loop6: p200 start 4293394690 is beyond EOD, truncated loop6: p201 start 51379968 is beyond EOD, truncated loop6: p202 start 4293394690 is beyond EOD, truncated loop6: p203 start 51379968 is beyond EOD, truncated loop6: p204 start 4293394690 is beyond EOD, truncated loop6: p205 start 51379968 is beyond EOD, truncated loop6: p206 start 4293394690 is beyond EOD, truncated loop6: p207 start 51379968 is beyond EOD, truncated loop6: p208 start 4293394690 is beyond EOD, truncated loop6: p209 start 51379968 is beyond EOD, truncated loop6: p210 start 4293394690 is beyond EOD, truncated loop6: p211 start 51379968 is beyond EOD, truncated loop6: p212 start 4293394690 is beyond EOD, truncated loop6: p213 start 51379968 is beyond EOD, truncated loop6: p214 start 4293394690 is beyond EOD, truncated loop6: p215 start 51379968 is beyond EOD, truncated loop6: p216 start 4293394690 is beyond EOD, truncated loop6: p217 start 51379968 is beyond EOD, truncated loop6: p218 start 4293394690 is beyond EOD, truncated loop6: p219 start 51379968 is beyond EOD, truncated loop6: p220 start 4293394690 is beyond EOD, truncated loop6: p221 start 51379968 is beyond EOD, truncated loop6: p222 start 4293394690 is beyond EOD, truncated loop6: p223 start 51379968 is beyond EOD, truncated loop6: p224 start 4293394690 is beyond EOD, truncated loop6: p225 start 51379968 is beyond EOD, truncated loop6: p226 start 4293394690 is beyond EOD, truncated loop6: p227 start 51379968 is beyond EOD, truncated loop6: p228 start 4293394690 is beyond EOD, truncated loop6: p229 start 51379968 is beyond EOD, truncated loop6: p230 start 4293394690 is beyond EOD, truncated loop6: p231 start 51379968 is beyond EOD, truncated loop6: p232 start 4293394690 is beyond EOD, truncated loop6: p233 start 51379968 is beyond EOD, truncated loop6: p234 start 4293394690 is beyond EOD, truncated loop6: p235 start 51379968 is beyond EOD, truncated loop6: p236 start 4293394690 is beyond EOD, truncated loop6: p237 start 51379968 is beyond EOD, truncated loop6: p238 start 4293394690 is beyond EOD, truncated loop6: p239 start 51379968 is beyond EOD, truncated loop6: p240 start 4293394690 is beyond EOD, truncated loop6: p241 start 51379968 is beyond EOD, truncated loop6: p242 start 4293394690 is beyond EOD, truncated loop6: p243 start 51379968 is beyond EOD, truncated loop6: p244 start 4293394690 is beyond EOD, truncated loop6: p245 start 51379968 is beyond EOD, truncated loop6: p246 start 4293394690 is beyond EOD, truncated loop6: p247 start 51379968 is beyond EOD, truncated loop6: p248 start 4293394690 is beyond EOD, truncated loop6: p249 start 51379968 is beyond EOD, truncated loop6: p250 start 4293394690 is beyond EOD, truncated loop6: p251 start 51379968 is beyond EOD, truncated loop6: p252 start 4293394690 is beyond EOD, truncated loop6: p253 start 51379968 is beyond EOD, truncated loop6: p254 start 4293394690 is beyond EOD, truncated loop6: p255 start 51379968 is beyond EOD, truncated