================================================================== BUG: KCSAN: data-race in __kernfs_remove / kernfs_iop_permission read-write to 0xffff8881025c6b40 of 8 bytes by task 3793 on cpu 1: kernfs_unlink_sibling fs/kernfs/dir.c:412 [inline] __kernfs_remove+0x2ee/0x440 fs/kernfs/dir.c:1467 kernfs_remove+0x4e/0x70 fs/kernfs/dir.c:1503 sysfs_remove_dir+0x7e/0xa0 fs/sysfs/dir.c:101 __kobject_del+0x9d/0x1a0 lib/kobject.c:597 kobject_del+0x2e/0x50 lib/kobject.c:620 device_del+0x724/0x790 drivers/base/core.c:3823 drop_partition block/partitions/core.c:273 [inline] delete_partition+0xb2/0xc0 block/partitions/core.c:288 bdev_disk_changed+0x156/0xbd0 block/partitions/core.c:670 __loop_clr_fd+0x295/0x3b0 drivers/block/loop.c:1189 lo_release+0xe4/0xf0 drivers/block/loop.c:1743 blkdev_put+0x3f2/0x470 blkdev_release+0x50/0x60 block/fops.c:532 __fput+0x303/0x600 fs/file_table.c:384 ____fput+0x15/0x20 fs/file_table.c:412 task_work_run+0x135/0x1a0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd1/0xe0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff8881025c6b40 of 8 bytes by task 2766 on cpu 0: kernfs_refresh_inode fs/kernfs/inode.c:181 [inline] kernfs_iop_permission+0x165/0x1b0 fs/kernfs/inode.c:289 do_inode_permission fs/namei.c:461 [inline] inode_permission+0x184/0x300 fs/namei.c:528 may_lookup fs/namei.c:1720 [inline] link_path_walk+0x19e/0x7e0 fs/namei.c:2267 path_lookupat+0x72/0x2a0 fs/namei.c:2478 filename_lookup+0x126/0x300 fs/namei.c:2508 vfs_statx+0xa9/0x300 fs/stat.c:238 vfs_fstatat fs/stat.c:276 [inline] __do_sys_newfstatat fs/stat.c:446 [inline] __se_sys_newfstatat+0x8a/0x2a0 fs/stat.c:440 __x64_sys_newfstatat+0x55/0x60 fs/stat.c:440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x000000000000000c -> 0x000000000000000b Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2766 Comm: udevd Not tainted 6.5.0-rc4-syzkaller-00041-gec351c8f2e62 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 ================================================================== loop2: p1 < p5 p6 p7 p8 p9 p10 p11 p12 p13 p14 p15 p16 p17 p18 p19 p20 p21 p22 p23 p24 p25 p26 p27 p28 p29 p30 p31 p32 p33 p34 p35 p36 p37 p38 p39 p40 p41 p42 p43 p44 p45 p46 p47 p48 p49 p50 p51 p52 p53 p54 p55 p56 p57 p58 p59 p60 p61 p62 p63 p64 p65 p66 p67 p68 p69 p70 p71 p72 p73 p74 p75 p76 p77 p78 p79 p80 p81 p82 p83 p84 p85 p86 p87 p88 p89 p90 p91 p92 p93 p94 p95 p96 p97 p98 p99 p100 p101 p102 p103 p104 p105 p106 p107 p108 p109 p110 p111 p112 p113 p114 p115 p116 p117 p118 p119 p120 p121 p122 p123 p124 p125 p126 p127 p128 p129 p130 p131 p132 p133 p134 p135 p136 p137 p138 p139 p140 p141 p142 p143 p144 p145 p146 p147 p148 p149 p150 p151 p152 p153 p154 p155 p156 p157 p158 p159 p160 p161 p162 p163 p164 p165 p166 p167 p168 p169 p170 p171 p172 p173 p174 p175 p176 p177 p178 p179 p180 p181 p182 p183 p184 p185 p186 p187 p188 p189 p190 p191 p192 p193 p194 p195 p196 p197 p198 p199 p200 p201 p202 p203 p204 p205 p206 p207 p208 p209 p210 p211 p212 p213 p214 p215 p216 p217 p218 p219 p220 p221 p222 p223 p224 p225 p22