truncated
==================================================================
BUG: KCSAN: data-race in data_alloc / data_push_tail
write to 0xffffffff893cb2c8 of 8 bytes by task 4972 on cpu 0:
data_alloc+0x240/0x380 kernel/printk/printk_ringbuffer.c:1116
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
blk_add_partition block/partitions/core.c:542 [inline]
blk_add_partitions block/partitions/core.c:635 [inline]
bdev_disk_changed+0x997/0xe20 block/partitions/core.c:695
loop_reread_partitions drivers/block/loop.c:443 [inline]
loop_set_status+0x5af/0x670 drivers/block/loop.c:1272
loop_set_status64 drivers/block/loop.c:1368 [inline]
lo_ioctl+0x66d/0x1390 drivers/block/loop.c:1554
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
read to 0xffffffff893cb2c8 of 8 bytes by task 4993 on cpu 1:
data_make_reusable kernel/printk/printk_ringbuffer.c:608 [inline]
data_push_tail+0x104/0x440 kernel/printk/printk_ringbuffer.c:693
data_alloc+0x111/0x380 kernel/printk/printk_ringbuffer.c:1089
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
disk_unlock_native_capacity block/partitions/core.c:522 [inline]
blk_add_partition block/partitions/core.c:545 [inline]
blk_add_partitions block/partitions/core.c:635 [inline]
bdev_disk_changed+0xacb/0xe20 block/partitions/core.c:695
loop_reread_partitions drivers/block/loop.c:443 [inline]
loop_set_status+0x5af/0x670 drivers/block/loop.c:1272
loop_set_status64 drivers/block/loop.c:1368 [inline]
lo_ioctl+0x66d/0x1390 drivers/block/loop.c:1554
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: 0x000000000000797a -> 0x000000000000880c
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 4993 Comm: syz.8.10231 Tainted: G W syzkaller #0 PREEMPT(lazy)
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
==================================================================
loop8: p25 start 53543428 is beyond EOD,
truncated
loop8: p26 start 53543428 is beyond EOD,
truncated
loop8: p27 start 53543428 is beyond EOD,
truncated
loop8: p28 start 53543428 is beyond EOD,
truncated
loop8: p29 start 53543428 is beyond EOD,
truncated
loop8: p30 start 53543428 is beyond EOD,
truncated
loop8: p31 start 53543428 is beyond EOD,
truncated
loop8: p32 start 53543428 is beyond EOD,
truncated
loop8: p33 start 53543428 is beyond EOD,
truncated
loop8: p34 start 53543428 is beyond EOD, truncated
loop8: p35 start 53543428 is beyond EOD,
truncated
loop8: p36 start 53543428 is beyond EOD,
truncated
loop8: p37 start 53543428 is beyond EOD, truncated
loop8: p38 start 53543428 is beyond EOD, truncated
loop8: p39 start 53543428 is beyond EOD, truncated
loop8: p40 start 53543428 is beyond EOD,
truncated
loop8: p41 start 53543428 is beyond EOD, truncated
loop8: p42 start 53543428 is beyond EOD, truncated
loop8: p43 start 53543428 is beyond EOD,
truncated
loop8: p44 start 53543428 is beyond EOD, truncated
loop8: p45 start 53543428 is beyond EOD,
truncated
loop8: p46 start 53543428 is beyond EOD, truncated
loop8: p47 start 53543428 is beyond EOD,
truncated
loop8: p48 start 53543428 is beyond EOD, truncated
loop8: p49 start 53543428 is beyond EOD, truncated
loop8: p50 start 53543428 is beyond EOD,
truncated
loop8: p51 start 53543428 is beyond EOD, truncated
loop8: p52 start 53543428 is beyond EOD,
truncated
loop8: p53 start 53543428 is beyond EOD,
truncated
loop8: p54 start 53543428 is beyond EOD, truncated
loop8: p55 start 53543428 is beyond EOD, truncated
loop8: p56 start 53543428 is beyond EOD,
truncated
loop8: p57 start 53543428 is beyond EOD, truncated
loop8: p58 start 53543428 is beyond EOD,
truncated
loop8: p59 start 53543428 is beyond EOD, truncated
loop8: p60 start 53543428 is beyond EOD, truncated
loop8: p61 start 53543428 is beyond EOD, truncated
loop8: p62 start 53543428 is beyond EOD,
truncated
loop8: p63 start 53543428 is beyond EOD, truncated
loop8: p64 start 53543428 is beyond EOD, truncated
loop8: p65 start 53543428 is beyond EOD, truncated
loop8: p66 start 53543428 is beyond EOD,
truncated
loop8: p67 start 53543428 is beyond EOD, truncated
loop8: p68 start 53543428 is beyond EOD, truncated
loop8: p69 start 53543428 is beyond EOD, truncated
loop8: p70 start 53543428 is beyond EOD, truncated
loop8: p71 start 53543428 is beyond EOD,
truncated
loop8: p72 start 53543428 is beyond EOD, truncated
loop8: p73 start 53543428 is beyond EOD, truncated
loop8: p74 start 53543428 is beyond EOD, truncated
loop8: p75 start 53543428 is beyond EOD,
truncated
loop8: p76 start 53543428 is beyond EOD, truncated
loop8: p77 start 53543428 is beyond EOD, truncated
loop8: p78 start 53543428 is beyond EOD,
truncated
loop8: p79 start 53543428 is beyond EOD,
truncated
loop8: p80 start 53543428 is beyond EOD,
truncated
loop8: p81 start 53543428 is beyond EOD, truncated
loop8: p82 start 53543428 is beyond EOD,
truncated
loop8: p83 start 53543428 is beyond EOD, truncated
loop8: p84 start 53543428 is beyond EOD,
truncated
loop8: p85 start 53543428 is beyond EOD, truncated
loop8: p86 start 53543428 is beyond EOD,
truncated
loop8: p87 start 53543428 is beyond EOD, truncated
loop8: p88 start 53543428 is beyond EOD,
truncated
loop8: p89 start 53543428 is beyond EOD, truncated
loop8: p90 start 53543428 is beyond EOD,
truncated
loop8: p91 start 53543428 is beyond EOD, truncated
loop8: p92 start 53543428 is beyond EOD, truncated
loop8: p93 start 53543428 is beyond EOD,
truncated
loop8: p94 start 53543428 is beyond EOD, truncated
loop8: p95 start 53543428 is beyond EOD,
truncated
loop8: p96 start 53543428 is beyond EOD, truncated
loop8: p97 start 53543428 is beyond EOD, truncated
loop8: p98 start 53543428 is beyond EOD, truncated
loop8: p99 start 53543428 is beyond EOD, truncated
loop8: p100 start 53543428 is beyond EOD, truncated
loop8: p101 start 53543428 is beyond EOD, truncated
loop8: p102 start 53543428 is beyond EOD, truncated
loop8: p103 start 53543428 is beyond EOD,
truncated
loop8: p104 start 53543428 is beyond EOD, truncated
loop8: p105 start 53543428 is beyond EOD,
truncated
loop8: p106 start 53543428 is beyond EOD, truncated
loop8: p107 start 53543428 is beyond EOD, truncated
loop8: p108 start 53543428 is beyond EOD, truncated
loop8: p109 start 53543428 is beyond EOD,
truncated
loop8: p110 start 53543428 is beyond EOD, truncated
loop8: p111 start 53543428 is beyond EOD, truncated
loop8: p112 start 53543428 is beyond EOD, truncated
loop8: p113 start 53543428 is beyond EOD, truncated
loop8: p114 start 53543428 is beyond EOD, truncated
loop8: p115 start 53543428 is beyond EOD,
truncated
loop8: p116 start 53543428 is beyond EOD, truncated
loop8: p117 start 53543428 is beyond EOD, truncated
loop8: p118 start 53543428 is beyond EOD,
truncated
loop8: p119 start 53543428 is beyond EOD, truncated
loop8: p120 start 53543428 is beyond EOD,
truncated
loop8: p121 start 53543428 is beyond EOD, truncated
loop8: p122 start 53543428 is beyond EOD,
truncated
loop8: p123 start 53543428 is beyond EOD, truncated
loop8: p124 start 53543428 is beyond EOD,
truncated
loop8: p125 start 53543428 is beyond EOD, truncated
loop8: p126 start 53543428 is beyond EOD, truncated
loop8: p127 start 53543428 is beyond EOD, truncated
loop8: p128 start 53543428 is beyond EOD,
truncated
loop8: p129 start 53543428 is beyond EOD, truncated
loop8: p130 start 53543428 is beyond EOD, truncated
loop8: p131 start 53543428 is beyond EOD, truncated
loop8: p132 start 53543428 is beyond EOD,
truncated
loop8: p133 start 53543428 is beyond EOD, truncated
loop8: p134 start 53543428 is beyond EOD, truncated
loop8: p135 start 53543428 is beyond EOD, truncated
loop8: p136 start 53543428 is beyond EOD, truncated
loop8: p137 start 53543428 is beyond EOD, truncated
loop8: p138 start 53543428 is beyond EOD,
truncated
loop8: p139 start 53543428 is beyond EOD, truncated
loop8: p140 start 53543428 is beyond EOD, truncated
loop8: p141 start 53543428 is beyond EOD, truncated
loop8: p142 start 53543428 is beyond EOD, truncated
loop8: p143 start 53543428 is beyond EOD,
truncated
loop8: p144 start 53543428 is beyond EOD, truncated
loop8: p145 start 53543428 is beyond EOD, truncated
loop8: p146 start 53543428 is beyond EOD,
truncated
loop8: p147 start 53543428 is beyond EOD, truncated
loop8: p148 start 53543428 is beyond EOD, truncated
loop8: p149 start 53543428 is beyond EOD, truncated
loop8: p150 start 53543428 is beyond EOD, truncated
loop8: p151 start 53543428 is beyond EOD, truncated
loop8: p152 start 53543428 is beyond EOD,
truncated
loop8: p153 start 53543428 is beyond EOD, truncated
loop8: p154 start 53543428 is beyond EOD,
truncated
loop8: p155 start 53543428 is beyond EOD,
truncated
loop8: p156 start 53543428 is beyond EOD, truncated
loop8: p157 start 53543428 is beyond EOD,
truncated
loop8: p158 start 53543428 is beyond EOD,
truncated
loop8: p159 start 53543428 is beyond EOD,
truncated
loop8: p160 start 53543428 is beyond EOD,
truncated
loop8: p161 start 53543428 is beyond EOD, truncated
loop8: p162 start 53543428 is beyond EOD,
truncated
loop8: p163 start 53543428 is beyond EOD,
truncated
loop8: p164 start 53543428 is beyond EOD,
truncated
loop8: p165 start 53543428 is beyond EOD, truncated
loop8: p166 start 53543428 is beyond EOD,
truncated
loop8: p167 start 53543428 is beyond EOD,
truncated
loop8: p168 start 53543428 is beyond EOD,
truncated
loop8: p169 start 53543428 is beyond EOD,
truncated
loop8: p170 start 53543428 is beyond EOD,
truncated
loop8: p171 start 53543428 is beyond EOD,
truncated
loop8: p172 start 53543428 is beyond EOD,
truncated
loop8: p173 start 53543428 is beyond EOD,
truncated
loop8: p174 start 53543428 is beyond EOD,
truncated
loop8: p175 start 53543428 is beyond EOD,
truncated
loop8: p176 start 53543428 is beyond EOD,
truncated
loop8: p177 start 53543428 is beyond EOD,
truncated
loop8: p178 start 53543428 is beyond EOD,
truncated
loop8: p179 start 53543428 is beyond EOD,
truncated
loop8: p180 start 53543428 is beyond EOD,
truncated
loop8: p181 start 53543428 is beyond EOD, truncated
loop8: p182 start 53543428 is beyond EOD,
truncated
loop8: p183 start 53543428 is beyond EOD,
truncated
loop8: p184 start 53543428 is beyond EOD,
truncated
loop8: p185 start 53543428 is beyond EOD,
truncated
loop8: p186 start 53543428 is beyond EOD, truncated
loop8: p187 start 53543428 is beyond EOD,
truncated
loop8: p188 start 53543428 is beyond EOD,
truncated
loop8: p189 start 53543428 is beyond EOD,
truncated
loop8: p190 start 53543428 is beyond EOD, truncated
loop8: p191 start 53543428 is beyond EOD, truncated
loop8: p192 start 53543428 is beyond EOD,
truncated
loop8: p193 start 53543428 is beyond EOD,
truncated
loop8: p194 start 53543428 is beyond EOD,
truncated
loop8: p195 start 53543428 is beyond EOD,
truncated
loop8: p196 start 53543428 is beyond EOD,
truncated
loop8: p197 start 53543428 is beyond EOD, truncated
loop8: p198 start 53543428 is beyond EOD, truncated
loop8: p199 start 53543428 is beyond EOD,
truncated
loop8: p200 start 53543428 is beyond EOD, truncated
loop8: p201 start 53543428 is beyond EOD, truncated
loop8: p202 start 53543428 is beyond EOD, truncated
loop8: p203 start 53543428 is beyond EOD,
truncated
loop8: p204 start 53543428 is beyond EOD, truncated
loop8: p205 start 53543428 is beyond EOD, truncated
loop8: p206 start 53543428 is beyond EOD,
truncated
loop8: p207 start 53543428 is beyond EOD, truncated
loop8: p208 start 53543428 is beyond EOD,
truncated
loop8: p209 start 53543428 is beyond EOD,
truncated
loop8: p210 start 53543428 is beyond EOD,
truncated
loop8: p211 start 53543428 is beyond EOD,
truncated
loop8: p212 start 53543428 is beyond EOD, truncated
loop8: p213 start 53543428 is beyond EOD, truncated
loop8: p214 start 53543428 is beyond EOD, truncated
loop8: p215 start 53543428 is beyond EOD, truncated
loop8: p216 start 53543428 is beyond EOD, truncated
loop8: p217 start 53543428 is beyond EOD, truncated
loop8: p218 start 53543428 is beyond EOD, truncated
loop8: p219 start 53543428 is beyond EOD, truncated
loop8: p220 start 53543428 is beyond EOD, truncated
loop8: p221 start 53543428 is beyond EOD, truncated
loop8: p222 start 53543428 is beyond EOD, truncated
loop8: p223 start 53543428 is beyond EOD, truncated
loop8: p224 start 53543428 is beyond EOD, truncated
loop8: p225 start 53543428 is beyond EOD, truncated
loop8: p226 start 53543428 is beyond EOD, truncated
loop8: p227 start 53543428 is beyond EOD, truncated
loop8: p228 start 53543428 is beyond EOD, truncated
loop8: p229 start 53543428 is beyond EOD, truncated
loop8: p230 start 53543428 is beyond EOD, truncated
loop8: p231 start 53543428 is beyond EOD, truncated
loop8: p232 start 53543428 is beyond EOD, truncated
loop8: p233 start 53543428 is beyond EOD, truncated
loop8: p234 start 53543428 is beyond EOD, truncated
loop8: p235 start 53543428 is beyond EOD, truncated
loop8: p236 start 53543428 is beyond EOD, truncated
loop8: p237 start 53543428 is beyond EOD, truncated
loop8: p238 start 53543428 is beyond EOD, truncated
loop8: p239 start 53543428 is beyond EOD, truncated
loop8: p240 start 53543428 is beyond EOD, truncated
loop8: p241 start 53543428 is beyond EOD, truncated
loop8: p242 start 53543428 is beyond EOD, truncated
loop8: p243 start 53543428 is beyond EOD, truncated
loop8: p244 start 53543428 is beyond EOD, truncated
loop8: p245 start 53543428 is beyond EOD, truncated
loop8: p246 start 53543428 is beyond EOD, truncated
loop8: p247 start 53543428 is beyond EOD, truncated
loop8: p248 start 53543428 is beyond EOD, truncated
loop8: p249 start 53543428 is beyond EOD, truncated
loop8: p250 start 53543428 is beyond EOD, truncated
loop8: p251 start 53543428 is beyond EOD, truncated
loop8: p252 start 53543428 is beyond EOD, truncated
loop8: p253 start 53543428 is beyond EOD, truncated
loop8: p254 start 53543428 is beyond EOD, truncated
loop8: p255 start 53543428 is beyond EOD, truncated