(4844) [ 504.242971][T24366] loop1: detected capacity change from 0 to 32768 [ 504.255160][T24366] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24366) [ 504.277844][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 504.419567][T24380] loop2: detected capacity change from 0 to 32768 [ 504.424746][T24380] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24380) [ 504.451851][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 504.569463][T24383] loop1: detected capacity change from 0 to 32768 [ 504.574330][T24383] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24383) [ 504.578146][T24373] loop3: detected capacity change from 0 to 32768 [ 504.595106][T24373] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24373) [ 504.611855][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 504.624847][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 504.635056][T24375] loop0: detected capacity change from 0 to 32768 [ 504.640401][T24375] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24375) [ 504.666630][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 504.962760][T24381] loop4: detected capacity change from 0 to 32768 [ 504.976925][T24381] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24381) [ 504.992632][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 505.060477][T24385] loop2: detected capacity change from 0 to 32768 [ 505.068191][T24385] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24385) [ 505.087590][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 505.215101][T24392] loop3: detected capacity change from 0 to 32768 [ 505.222491][T24392] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24392) [ 505.240227][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 505.282127][T24391] loop1: detected capacity change from 0 to 32768 [ 505.283717][T24387] loop0: detected capacity change from 0 to 32768 [ 505.288562][T24387] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24387) [ 505.301001][T24391] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24391) [ 505.324511][T24391] FAULT_INJECTION: forcing a failure. [ 505.324511][T24391] name fail_page_alloc, interval 1, probability 0, space 0, times 0 [ 505.338378][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 505.343830][T24391] CPU: 1 PID: 24391 Comm: syz-executor854 Not tainted syzkaller #0 [ 505.345080][T24391] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 505.346596][T24391] Call trace: [ 505.347096][T24391] dump_backtrace+0x0/0x43c [ 505.347783][T24391] show_stack+0x2c/0x3c [ 505.348496][T24391] __dump_stack+0x30/0x40 [ 505.349134][T24391] dump_stack_lvl+0xf8/0x160 [ 505.349809][T24391] dump_stack+0x1c/0x5c [ 505.350364][T24391] should_fail+0x3c0/0x51c [ 505.351024][T24391] should_fail_alloc_page+0x74/0xa8 [ 505.351783][T24391] prepare_alloc_pages+0x160/0x460 [ 505.352602][T24391] __alloc_pages+0x108/0x470 [ 505.353277][T24391] alloc_pages+0x34c/0x5c0 [ 505.354022][T24391] __get_free_pages+0x18/0x84 [ 505.354804][T24391] tlb_remove_table+0x12c/0x21c [ 505.355528][T24391] free_pgd_range+0x52c/0xc04 [ 505.356238][T24391] free_pgtables+0x23c/0x278 [ 505.356896][T24391] exit_mmap+0x2bc/0x4e0 [ 505.357477][T24391] __mmput+0xec/0x3b8 [ 505.358070][T24391] mmput+0x80/0xc8 [ 505.358610][T24391] exit_mm+0x4a0/0x684 [ 505.359259][T24391] do_exit+0x4ec/0x1f58 [ 505.359967][T24391] do_group_exit+0x100/0x268 [ 505.360721][T24391] get_signal+0x73c/0x1340 [ 505.361503][T24391] do_notify_resume+0x35c/0x3128 [ 505.362270][T24391] el0_svc+0xf0/0x1e0 [ 505.362876][T24391] el0t_64_sync_handler+0xcc/0xe4 [ 505.363687][T24391] el0t_64_sync+0x1a0/0x1a4 [ 505.377292][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 505.668032][T24400] loop4: detected capacity change from 0 to 32768 [ 505.672276][T24399] loop2: detected capacity change from 0 to 32768 [ 505.687618][T24399] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24399) [ 505.700510][T24400] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24400) [ 505.703687][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 505.705285][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 505.850578][T24409] loop1: detected capacity change from 0 to 32768 [ 505.867428][T24409] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24409) [ 505.889021][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 505.912761][T24407] loop0: detected capacity change from 0 to 32768 [ 505.938966][T24407] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24407) [ 505.964322][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 505.980962][T24405] loop3: detected capacity change from 0 to 32768 [ 505.997098][T24405] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24405) [ 506.037924][ T4312] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4312) [ 506.108562][T24411] loop2: detected capacity change from 0 to 32768 [ 506.119433][T24411] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24411) [ 506.150667][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 506.268732][T24413] loop4: detected capacity change from 0 to 32768 [ 506.277992][T24413] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24413) [ 506.294672][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 506.510852][T24418] loop0: detected capacity change from 0 to 32768 [ 506.530383][T24418] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24418) [ 506.544276][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 506.552863][T24415] loop1: detected capacity change from 0 to 32768 [ 506.562941][T24415] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24415) [ 506.579108][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 506.627734][T24422] loop3: detected capacity change from 0 to 32768 [ 506.647364][T24422] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24422) [ 506.686564][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 506.766439][T24424] loop2: detected capacity change from 0 to 32768 [ 506.772248][T24424] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24424) [ 506.795517][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 506.926019][T24426] loop4: detected capacity change from 0 to 32768 [ 506.940958][T24426] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24426) [ 506.968445][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 507.124419][T24435] loop3: detected capacity change from 0 to 32768 [ 507.136615][T24435] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24435) [ 507.149766][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 507.209469][T24437] loop2: detected capacity change from 0 to 32768 [ 507.223094][T24437] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24437) [ 507.236321][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 507.239594][T24433] loop0: detected capacity change from 0 to 32768 [ 507.248670][T24433] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24433) [ 507.265288][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 507.324300][T24431] loop1: detected capacity change from 0 to 32768 [ 507.338415][T24431] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24431) [ 507.357015][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 507.540946][T24445] loop0: detected capacity change from 0 to 32768 [ 507.549429][T24445] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24445) [ 507.569656][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 507.601575][T24443] loop4: detected capacity change from 0 to 32768 [ 507.611896][T24443] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24443) [ 507.647566][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 507.814061][T24447] loop3: detected capacity change from 0 to 32768 [ 507.830587][T24447] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24447) [ 507.973642][T24451] loop2: detected capacity change from 0 to 32768 [ 507.986589][T24451] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24451) [ 508.003758][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 508.007175][T24450] loop1: detected capacity change from 0 to 32768 [ 508.017294][T24450] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24450) [ 508.023205][T24454] loop0: detected capacity change from 0 to 32768 [ 508.033330][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 508.069234][T24454] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24454) [ 508.084992][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 508.283784][T24467] loop2: detected capacity change from 0 to 32768 [ 508.291578][T24467] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24467) [ 508.332598][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 508.373414][T24456] loop4: detected capacity change from 0 to 32768 [ 508.400444][T24456] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24456) [ 508.431852][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 508.487763][T24461] loop3: detected capacity change from 0 to 32768 [ 508.540263][T24461] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24461) [ 508.573397][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 508.613726][T24465] loop0: detected capacity change from 0 to 32768 [ 508.629171][T24465] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24465) [ 508.665169][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 508.755279][T24463] loop1: detected capacity change from 0 to 32768 [ 508.774901][T24463] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24463) [ 508.792895][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 509.030111][T24470] loop2: detected capacity change from 0 to 32768 [ 509.041855][T24470] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24470) [ 509.070362][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 509.153832][T24482] loop1: detected capacity change from 0 to 32768 [ 509.197456][T24482] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24482) [ 509.225185][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 509.273451][T24472] loop4: detected capacity change from 0 to 32768 [ 509.329297][T24472] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24472) [ 509.331312][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 509.343681][T24479] loop0: detected capacity change from 0 to 32768 [ 509.355632][T24479] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24479) [ 509.399329][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 509.424559][T24477] loop3: detected capacity change from 0 to 32768 [ 509.435889][T24477] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24477) [ 509.487745][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 509.683873][T24494] loop0: detected capacity change from 0 to 32768 [ 509.708963][T24494] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24494) [ 509.712232][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 509.747283][T24486] loop2: detected capacity change from 0 to 32768 [ 509.759010][T24486] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24486) [ 509.790541][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 509.801000][T24498] loop4: detected capacity change from 0 to 32768 [ 509.806920][T24498] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24498) [ 509.835173][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 509.902158][T24489] loop1: detected capacity change from 0 to 32768 [ 509.924290][T24489] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24489) [ 509.943108][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 510.115730][T24496] loop3: detected capacity change from 0 to 32768 [ 510.132232][T24496] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24496) [ 510.159914][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 510.270372][T24500] loop4: detected capacity change from 0 to 32768 [ 510.282195][T24500] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24500) [ 510.291799][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 510.302267][T24504] loop0: detected capacity change from 0 to 32768 [ 510.317639][T24504] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24504) [ 510.332865][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 510.449521][T24512] loop3: detected capacity change from 0 to 32768 [ 510.461194][T24512] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24512) [ 510.477348][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 510.531370][T24502] loop2: detected capacity change from 0 to 32768 [ 510.543146][T24502] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24502) [ 510.561103][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 510.573004][T24507] loop1: detected capacity change from 0 to 32768 [ 510.586647][T24507] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24507) [ 510.620472][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 510.805643][T24522] loop1: detected capacity change from 0 to 32768 [ 510.826349][T24522] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24522) [ 510.848117][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 511.016083][T24520] loop2: detected capacity change from 0 to 32768 [ 511.077099][T24520] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24520) [ 511.087491][T24518] loop3: detected capacity change from 0 to 32768 [ 511.103528][T24518] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24518) [ 511.117426][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 511.122856][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 511.192561][T24514] loop0: detected capacity change from 0 to 32768 [ 511.210930][T24514] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24514) [ 511.211951][T24516] loop4: detected capacity change from 0 to 32768 [ 511.228392][T24516] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24516) [ 511.245868][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 511.267757][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 511.555267][T24532] loop3: detected capacity change from 0 to 32768 [ 511.566256][T24532] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24532) [ 511.587146][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 511.625044][T24536] loop4: detected capacity change from 0 to 32768 [ 511.656005][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 511.659517][T24536] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24536) [ 511.663068][T24525] loop1: detected capacity change from 0 to 32768 [ 511.671910][T24525] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24525) [ 511.693019][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 511.813746][T24530] loop2: detected capacity change from 0 to 32768 [ 511.831297][T24530] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24530) [ 511.845493][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 511.938177][T24534] loop0: detected capacity change from 0 to 32768 [ 511.957230][T24534] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24534) [ 511.990342][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 512.221581][T24541] loop1: detected capacity change from 0 to 32768 [ 512.234444][T24541] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24541) [ 512.248024][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 512.390588][T24550] loop0: detected capacity change from 0 to 32768 [ 512.393114][T24550] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24550) [ 512.415529][T24545] loop4: detected capacity change from 0 to 32768 [ 512.421827][T24545] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24545) [ 512.460846][T24543] loop3: detected capacity change from 0 to 32768 [ 512.463765][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 512.482421][T24543] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24543) [ 512.505999][ T4312] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4312) [ 512.591787][T24548] loop2: detected capacity change from 0 to 32768 [ 512.607160][T24548] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24548) [ 512.633552][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 512.904584][T24558] loop1: detected capacity change from 0 to 32768 [ 512.918565][T24561] loop4: detected capacity change from 0 to 32768 [ 512.924785][T24558] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24558) [ 512.937248][T24561] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24561) [ 512.952490][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 512.954334][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 513.071373][T24565] loop0: detected capacity change from 0 to 32768 [ 513.077835][T24565] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24565) [ 513.098461][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 513.133394][T24563] loop3: detected capacity change from 0 to 32768 [ 513.142658][T24563] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24563) [ 513.164678][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 513.221909][T24567] loop2: detected capacity change from 0 to 32768 [ 513.233897][T24567] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24567) [ 513.258127][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 513.362627][T24572] loop1: detected capacity change from 0 to 32768 [ 513.373620][T24572] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24572) [ 513.386788][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 513.607836][T24574] loop4: detected capacity change from 0 to 32768 [ 513.619796][T24574] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24574) [ 513.636807][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 513.683853][T24576] loop0: detected capacity change from 0 to 32768 [ 513.699325][T24576] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24576) [ 513.716548][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 513.750691][T24578] loop3: detected capacity change from 0 to 32768 [ 513.758650][T24578] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24578) [ 513.792225][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 513.828175][T24580] loop2: detected capacity change from 0 to 32768 [ 513.838118][T24580] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24580) [ 513.856075][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 514.068329][T24592] loop3: detected capacity change from 0 to 32768 [ 514.076142][T24592] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24592) [ 514.086849][T24583] loop1: detected capacity change from 0 to 32768 [ 514.095705][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 514.106818][T24583] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24583) [ 514.125721][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 514.323173][T24594] loop2: detected capacity change from 0 to 32768 [ 514.336428][T24594] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24594) [ 514.359361][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 514.361153][T24588] loop4: detected capacity change from 0 to 32768 [ 514.375950][T24588] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24588) [ 514.390358][T24590] loop0: detected capacity change from 0 to 32768 [ 514.392854][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 514.410465][T24590] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24590) [ 514.434128][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 514.532674][T24596] loop3: detected capacity change from 0 to 32768 [ 514.542613][T24596] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24596) [ 514.555792][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 514.618657][T24598] loop1: detected capacity change from 0 to 32768 [ 514.627949][T24598] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24598) [ 514.647876][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 514.884024][T24606] loop4: detected capacity change from 0 to 32768 [ 514.889564][T24606] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24606) [ 514.913529][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 515.020696][T24612] loop1: detected capacity change from 0 to 32768 [ 515.034216][T24612] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24612) [ 515.053871][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 515.065026][T24609] loop3: detected capacity change from 0 to 32768 [ 515.072597][T24609] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24609) [ 515.099552][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 515.141088][T24603] loop2: detected capacity change from 0 to 32768 [ 515.162334][T24603] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24603) [ 515.190370][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 515.200527][T24607] loop0: detected capacity change from 0 to 32768 [ 515.210307][T24607] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24607) [ 515.230876][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 515.407052][T24616] loop4: detected capacity change from 0 to 32768 [ 515.414275][T24616] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24616) [ 515.443186][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 515.598888][T24622] loop2: detected capacity change from 0 to 32768 [ 515.599470][T24618] loop1: detected capacity change from 0 to 32768 [ 515.605864][T24618] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24618) [ 515.619434][T24622] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24622) [ 515.638431][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 515.640845][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 515.682308][T24620] loop3: detected capacity change from 0 to 32768 [ 515.699192][T24620] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24620) [ 515.726835][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 515.873404][T24632] loop1: detected capacity change from 0 to 32768 [ 515.885785][T24632] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24632) [ 515.895042][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 515.960463][T24624] loop0: detected capacity change from 0 to 32768 [ 515.976521][T24624] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24624) [ 515.997186][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 516.037447][T24636] loop3: detected capacity change from 0 to 32768 [ 516.043767][T24636] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24636) [ 516.096661][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 516.215728][T24638] loop1: detected capacity change from 0 to 32768 [ 516.227830][T24638] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24638) [ 516.236853][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 516.284018][T24634] loop2: detected capacity change from 0 to 32768 [ 516.327270][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 516.332698][T24634] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24634) [ 516.402744][T24627] loop4: detected capacity change from 0 to 32768 [ 516.423989][T24627] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24627) [ 516.444314][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 516.688709][T24644] loop1: detected capacity change from 0 to 32768 [ 516.702833][T24644] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24644) [ 516.715654][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 516.736357][T24640] loop0: detected capacity change from 0 to 32768 [ 516.747503][T24640] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24640) [ 516.757757][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 516.848382][T24642] loop3: detected capacity change from 0 to 32768 [ 516.869563][T24642] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24642) [ 516.882576][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 516.932516][T24649] loop4: detected capacity change from 0 to 32768 [ 516.941428][T24649] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24649) [ 516.965107][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 517.117165][T24646] loop2: detected capacity change from 0 to 32768 [ 517.127794][T24646] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24646) [ 517.151707][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 517.410151][T24655] loop0: detected capacity change from 0 to 32768 [ 517.427749][T24655] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24655) [ 517.440672][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 517.464977][T24666] loop2: detected capacity change from 0 to 32768 [ 517.506429][T24666] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24666) [ 517.511844][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 517.599098][T24660] loop4: detected capacity change from 0 to 32768 [ 517.612605][T24660] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24660) [ 517.617956][T24656] loop1: detected capacity change from 0 to 32768 [ 517.623163][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 517.632956][T24656] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24656) [ 517.652537][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 517.685075][T24658] loop3: detected capacity change from 0 to 32768 [ 517.697045][T24658] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24658) [ 517.720778][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 517.979757][T24672] loop1: detected capacity change from 0 to 32768 [ 517.991263][T24672] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24672) [ 518.001375][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 518.103018][T24668] loop2: detected capacity change from 0 to 32768 [ 518.118735][T24668] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24668) [ 518.142726][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 518.288735][T24670] loop0: detected capacity change from 0 to 32768 [ 518.301245][T24670] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24670) [ 518.313869][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 518.416881][T24676] loop4: detected capacity change from 0 to 32768 [ 518.442498][T24676] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24676) [ 518.445019][T24674] loop3: detected capacity change from 0 to 32768 [ 518.458468][T24674] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24674) [ 518.492483][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 518.495467][T24670] FAULT_INJECTION: forcing a failure. [ 518.495467][T24670] name fail_page_alloc, interval 1, probability 0, space 0, times 0 [ 518.510568][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 518.511924][T24670] CPU: 1 PID: 24670 Comm: syz-executor854 Not tainted syzkaller #0 [ 518.513470][T24670] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 518.515028][T24670] Call trace: [ 518.515548][T24670] dump_backtrace+0x0/0x43c [ 518.516243][T24670] show_stack+0x2c/0x3c [ 518.516897][T24670] __dump_stack+0x30/0x40 [ 518.517560][T24670] dump_stack_lvl+0xf8/0x160 [ 518.518274][T24670] dump_stack+0x1c/0x5c [ 518.518890][T24670] should_fail+0x3c0/0x51c [ 518.519541][T24670] should_fail_alloc_page+0x74/0xa8 [ 518.520297][T24670] prepare_alloc_pages+0x160/0x460 [ 518.521007][T24670] __alloc_pages+0x108/0x470 [ 518.521638][T24670] alloc_pages+0x34c/0x5c0 [ 518.522284][T24670] __get_free_pages+0x18/0x84 [ 518.522909][T24670] tlb_remove_table+0x12c/0x21c [ 518.523704][T24670] free_pgd_range+0x52c/0xc04 [ 518.524462][T24670] free_pgtables+0x23c/0x278 [ 518.525208][T24670] exit_mmap+0x2bc/0x4e0 [ 518.525879][T24670] __mmput+0xec/0x3b8 [ 518.526532][T24670] mmput+0x80/0xc8 [ 518.527143][T24670] exit_mm+0x4a0/0x684 [ 518.527804][T24670] do_exit+0x4ec/0x1f58 [ 518.528453][T24670] do_group_exit+0x100/0x268 [ 518.529155][T24670] get_signal+0x73c/0x1340 [ 518.529826][T24670] do_notify_resume+0x35c/0x3128 [ 518.530530][T24670] el0_svc+0xf0/0x1e0 [ 518.531159][T24670] el0t_64_sync_handler+0xcc/0xe4 [ 518.531971][T24670] el0t_64_sync+0x1a0/0x1a4 [ 518.693933][T24684] loop2: detected capacity change from 0 to 32768 [ 518.700601][T24681] loop1: detected capacity change from 0 to 32768 [ 518.705864][T24684] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24684) [ 518.718570][T24681] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24681) [ 518.727444][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 518.743227][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 519.017191][T24698] loop1: detected capacity change from 0 to 32768 [ 519.032718][T24698] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24698) [ 519.069050][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 519.071420][T24692] loop3: detected capacity change from 0 to 32768 [ 519.079969][T24692] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24692) [ 519.108438][T24689] loop4: detected capacity change from 0 to 32768 [ 519.113406][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 519.132169][T24689] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24689) [ 519.174704][ T4312] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4312) [ 519.218064][T24694] loop0: detected capacity change from 0 to 32768 [ 519.226391][T24694] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24694) [ 519.276445][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 519.346241][T24702] loop1: detected capacity change from 0 to 32768 [ 519.356482][T24702] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24702) [ 519.362309][T24697] loop2: detected capacity change from 0 to 32768 [ 519.383065][T24697] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24697) [ 519.397765][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 519.415064][ T4842] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4842) [ 519.725009][T24710] loop0: detected capacity change from 0 to 32768 [ 519.734672][T24704] loop3: detected capacity change from 0 to 32768 [ 519.739663][T24710] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24710) [ 519.751503][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 519.755999][T24708] loop4: detected capacity change from 0 to 32768 [ 519.763736][T24704] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24704) [ 519.769595][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 519.785167][T24708] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24708) [ 519.817776][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 519.842908][T24712] loop2: detected capacity change from 0 to 32768 [ 519.853418][T24712] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24712) [ 519.928764][ T4845] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4845) [ 520.007443][T24714] loop1: detected capacity change from 0 to 32768 [ 520.022345][T24714] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24714) [ 520.046148][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 520.100959][T24720] loop4: detected capacity change from 0 to 32768 [ 520.108544][T24720] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24720) [ 520.128311][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 520.314822][T24723] loop2: detected capacity change from 0 to 32768 [ 520.327959][T24723] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24723) [ 520.340816][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 520.350980][T24716] loop0: detected capacity change from 0 to 32768 [ 520.359858][T24716] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24716) [ 520.376673][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 520.416643][T24719] loop3: detected capacity change from 0 to 32768 [ 520.437329][T24719] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24719) [ 520.466909][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 520.650317][T24727] loop1: detected capacity change from 0 to 32768 [ 520.663093][T24727] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24727) [ 520.682405][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 520.815876][T24730] loop4: detected capacity change from 0 to 32768 [ 520.825852][T24730] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24730) [ 520.844987][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 520.852072][T24735] loop0: detected capacity change from 0 to 32768 [ 520.855978][T24735] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24735) [ 520.878377][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 520.971610][T24733] loop2: detected capacity change from 0 to 32768 [ 520.984440][T24733] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24733) [ 521.012510][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 521.020220][T24743] loop1: detected capacity change from 0 to 32768 [ 521.026286][T24743] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24743) [ 521.055155][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 521.136769][T24737] loop3: detected capacity change from 0 to 32768 [ 521.176231][T24737] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24737) [ 521.186066][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 521.308627][T24745] loop0: detected capacity change from 0 to 32768 [ 521.320050][T24745] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24745) [ 521.336386][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 521.361323][T24745] FAULT_INJECTION: forcing a failure. [ 521.361323][T24745] name failslab, interval 1, probability 0, space 0, times 0 [ 521.369234][T24745] CPU: 0 PID: 24745 Comm: syz-executor854 Not tainted syzkaller #0 [ 521.370502][T24745] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 521.372118][T24745] Call trace: [ 521.372601][T24745] dump_backtrace+0x0/0x43c [ 521.373256][T24745] show_stack+0x2c/0x3c [ 521.373881][T24745] __dump_stack+0x30/0x40 [ 521.374598][T24745] dump_stack_lvl+0xf8/0x160 [ 521.375381][T24745] dump_stack+0x1c/0x5c [ 521.376059][T24745] should_fail+0x3c0/0x51c [ 521.376752][T24745] __should_failslab+0xbc/0x10c [ 521.377603][T24745] should_failslab+0x10/0x28 [ 521.378405][T24745] slab_pre_alloc_hook+0x64/0xec [ 521.379273][T24745] __kmalloc+0xbc/0x44c [ 521.379988][T24745] mempool_kmalloc+0x28/0x38 [ 521.380717][T24745] mempool_alloc+0x144/0x3e8 [ 521.381436][T24745] nvme_queue_rq+0xc3c/0x2a84 [ 521.382223][T24745] __blk_mq_try_issue_directly+0x3e8/0x69c [ 521.383118][T24745] blk_mq_try_issue_list_directly+0x184/0x494 [ 521.384137][T24745] blk_mq_sched_insert_requests+0x300/0x73c [ 521.385030][T24745] blk_mq_flush_plug_list+0x4d4/0x74c [ 521.385885][T24745] blk_flush_plug_list+0x318/0x370 [ 521.386769][T24745] blk_finish_plug+0x68/0x90 [ 521.387541][T24745] ext4_writepages+0x2118/0x2c14 [ 521.388308][T24745] do_writepages+0x36c/0x578 [ 521.389041][T24745] filemap_fdatawrite_wbc+0x1d4/0x234 [ 521.389892][T24745] filemap_flush+0xa8/0xec [ 521.390639][T24745] ext4_alloc_da_blocks+0x11c/0x2e8 [ 521.391418][T24745] ext4_release_file+0x68/0x2dc [ 521.392162][T24745] __fput+0x1c0/0x7f8 [ 521.392772][T24745] ____fput+0x20/0x30 [ 521.393426][T24745] task_work_run+0x12c/0x1e0 [ 521.394179][T24745] do_exit+0x684/0x1f58 [ 521.394815][T24745] do_group_exit+0x100/0x268 [ 521.395492][T24745] get_signal+0x73c/0x1340 [ 521.396255][T24745] do_notify_resume+0x35c/0x3128 [ 521.397051][T24745] el0_svc+0xf0/0x1e0 [ 521.397691][T24745] el0t_64_sync_handler+0xcc/0xe4 [ 521.398502][T24745] el0t_64_sync+0x1a0/0x1a4 [ 521.425844][T24747] loop4: detected capacity change from 0 to 32768 [ 521.442507][T24747] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24747) [ 521.475237][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 521.641557][T24749] loop1: detected capacity change from 0 to 32768 [ 521.655565][T24749] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24749) [ 521.669069][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 521.677275][T24751] loop2: detected capacity change from 0 to 32768 [ 521.692449][T24751] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24751) [ 521.701922][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 521.817227][T24753] loop3: detected capacity change from 0 to 32768 [ 521.837761][T24756] loop0: detected capacity change from 0 to 32768 [ 521.842190][T24753] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24753) [ 521.863414][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 521.869133][T24756] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24756) [ 521.885337][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 522.006427][T24761] loop4: detected capacity change from 0 to 32768 [ 522.015817][T24761] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24761) [ 522.035041][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 522.057856][T24763] loop2: detected capacity change from 0 to 32768 [ 522.067118][T24763] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24763) [ 522.094233][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 522.295578][T24765] loop1: detected capacity change from 0 to 32768 [ 522.331733][T24765] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24765) [ 522.366592][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 522.397384][T24769] loop0: detected capacity change from 0 to 32768 [ 522.411614][T24769] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24769) [ 522.445683][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 522.482657][T24767] loop3: detected capacity change from 0 to 32768 [ 522.499511][T24767] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24767) [ 522.532980][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 522.611774][T24771] loop4: detected capacity change from 0 to 32768 [ 522.624711][T24771] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24771) [ 522.641479][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 522.747132][T24775] loop2: detected capacity change from 0 to 32768 [ 522.759601][T24775] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24775) [ 522.781071][ T4842] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4842) [ 522.948064][T24787] loop4: detected capacity change from 0 to 32768 [ 522.960391][T24787] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24787) [ 522.972990][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 523.008527][T24785] loop3: detected capacity change from 0 to 32768 [ 523.045959][T24785] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24785) [ 523.048011][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 523.061932][T24781] loop1: detected capacity change from 0 to 32768 [ 523.097360][T24781] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24781) [ 523.105538][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 523.174076][T24783] loop0: detected capacity change from 0 to 32768 [ 523.186533][T24783] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24783) [ 523.200850][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 523.519018][T24792] loop2: detected capacity change from 0 to 32768 [ 523.536551][T24792] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24792) [ 523.554523][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 523.564182][T24798] loop1: detected capacity change from 0 to 32768 [ 523.583245][T24798] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24798) [ 523.600185][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 523.627694][T24794] loop4: detected capacity change from 0 to 32768 [ 523.642845][T24794] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24794) [ 523.664879][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 523.716138][T24800] loop0: detected capacity change from 0 to 32768 [ 523.739124][T24800] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24800) [ 523.777862][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 523.898121][T24808] loop4: detected capacity change from 0 to 32768 [ 523.902152][T24796] loop3: detected capacity change from 0 to 32768 [ 523.910713][T24808] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24808) [ 523.923844][T24796] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24796) [ 523.935091][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 523.945428][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 524.182970][T24806] loop2: detected capacity change from 0 to 32768 [ 524.194452][T24806] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24806) [ 524.213839][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 524.267395][T24812] loop0: detected capacity change from 0 to 32768 [ 524.292910][T24812] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24812) [ 524.299206][T24815] loop4: detected capacity change from 0 to 32768 [ 524.310251][T24815] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24815) [ 524.354134][ T4312] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4312) [ 524.377327][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 524.558357][T24810] loop1: detected capacity change from 0 to 32768 [ 524.563280][T24824] loop0: detected capacity change from 0 to 32768 [ 524.573539][T24810] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24810) [ 524.586103][T24824] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24824) [ 524.595412][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 524.614274][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 524.790975][T24829] loop1: detected capacity change from 0 to 32768 [ 524.796269][T24829] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24829) [ 524.813329][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 524.884791][T24820] loop2: detected capacity change from 0 to 32768 [ 524.902671][T24820] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24820) [ 524.919352][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 524.949569][T24817] loop3: detected capacity change from 0 to 32768 [ 524.967039][T24817] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24817) [ 525.010086][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 525.160947][T24837] loop3: detected capacity change from 0 to 32768 [ 525.178231][T24837] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24837) [ 525.196357][T24833] loop1: detected capacity change from 0 to 32768 [ 525.199107][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 525.212882][T24833] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24833) [ 525.217235][T24827] loop4: detected capacity change from 0 to 32768 [ 525.230491][T24827] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24827) [ 525.242508][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 525.263393][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 525.464531][T24831] loop0: detected capacity change from 0 to 32768 [ 525.487786][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 525.509459][T24831] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24831) [ 525.867721][T24835] loop2: detected capacity change from 0 to 32768 [ 525.889570][T24835] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24835) [ 525.899452][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 525.991687][T24844] loop4: detected capacity change from 0 to 32768 [ 525.998072][T24844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24844) [ 526.004077][T24849] loop0: detected capacity change from 0 to 32768 [ 526.017667][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 526.040661][T24849] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24849) [ 526.054977][T24839] loop3: detected capacity change from 0 to 32768 [ 526.057762][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 526.071289][T24839] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24839) [ 526.082164][T24841] loop1: detected capacity change from 0 to 32768 [ 526.100274][T24841] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24841) [ 526.134955][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 526.145399][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 526.227950][T24854] loop2: detected capacity change from 0 to 32768 [ 526.285452][T24854] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24854) [ 526.329527][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 526.595182][T24858] loop4: detected capacity change from 0 to 32768 [ 526.601918][T24857] loop3: detected capacity change from 0 to 32768 [ 526.607606][T24858] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24858) [ 526.623770][T24857] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24857) [ 526.648297][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 526.652394][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 526.675975][T24861] loop0: detected capacity change from 0 to 32768 [ 526.678755][T24861] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24861) [ 526.681023][T24862] loop1: detected capacity change from 0 to 32768 [ 526.695637][T24862] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24862) [ 526.744610][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 526.755453][ T4312] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4312) [ 526.925421][T24864] loop2: detected capacity change from 0 to 32768 [ 526.957368][T24864] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24864) [ 526.972651][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 527.023461][T24870] loop4: detected capacity change from 0 to 32768 [ 527.052488][T24870] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24870) [ 527.076899][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 527.164572][T24875] loop3: detected capacity change from 0 to 32768 [ 527.176155][T24875] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24875) [ 527.185962][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 527.335790][T24880] loop4: detected capacity change from 0 to 32768 [ 527.338608][T24874] loop1: detected capacity change from 0 to 32768 [ 527.347137][T24880] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24880) [ 527.370326][T24874] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24874) [ 527.384087][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 527.388735][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 527.533027][T24876] loop0: detected capacity change from 0 to 32768 [ 527.547545][T24876] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24876) [ 527.563412][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 527.610481][T24878] loop2: detected capacity change from 0 to 32768 [ 527.627644][T24878] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24878) [ 527.652091][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 527.690578][T24882] loop3: detected capacity change from 0 to 32768 [ 527.694925][T24882] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24882) [ 527.720225][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 527.967265][T24887] loop1: detected capacity change from 0 to 32768 [ 527.981554][T24887] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24887) [ 528.003964][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 528.016609][T24891] loop0: detected capacity change from 0 to 32768 [ 528.033353][T24891] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24891) [ 528.047176][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 528.111922][T24885] loop4: detected capacity change from 0 to 32768 [ 528.126860][T24885] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24885) [ 528.185302][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 528.226773][T24895] loop3: detected capacity change from 0 to 32768 [ 528.234592][T24895] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24895) [ 528.255939][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 528.271549][T24893] loop2: detected capacity change from 0 to 32768 [ 528.285349][T24893] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24893) [ 528.315282][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 528.516852][T24898] loop1: detected capacity change from 0 to 32768 [ 528.534343][T24898] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24898) [ 528.544107][T24900] loop0: detected capacity change from 0 to 32768 [ 528.546460][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 528.558084][T24900] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24900) [ 528.574981][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 528.723388][T24905] loop4: detected capacity change from 0 to 32768 [ 528.734251][T24905] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24905) [ 528.748599][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 528.840179][T24907] loop3: detected capacity change from 0 to 32768 [ 528.858682][T24907] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24907) [ 528.883207][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 529.050244][T24909] loop2: detected capacity change from 0 to 32768 [ 529.057637][T24919] loop4: detected capacity change from 0 to 32768 [ 529.062657][T24909] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24909) [ 529.082198][T24919] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24919) [ 529.097330][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 529.112318][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 529.189628][T24912] loop0: detected capacity change from 0 to 32768 [ 529.204375][T24912] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24912) [ 529.232979][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 529.354863][T24914] loop1: detected capacity change from 0 to 32768 [ 529.373965][T24914] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24914) [ 529.391181][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 529.520486][T24923] loop2: detected capacity change from 0 to 32768 [ 529.533072][T24923] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24923) [ 529.550189][T24921] loop3: detected capacity change from 0 to 32768 [ 529.553960][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 529.562524][T24921] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24921) [ 529.587145][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 529.768487][T24925] loop4: detected capacity change from 0 to 32768 [ 529.791245][T24925] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24925) [ 529.801899][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 529.836018][T24928] loop0: detected capacity change from 0 to 32768 [ 529.872214][T24933] loop1: detected capacity change from 0 to 32768 [ 529.875937][T24928] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24928) [ 529.887915][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 529.892851][T24933] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24933) [ 529.900138][T24928] FAULT_INJECTION: forcing a failure. [ 529.900138][T24928] name failslab, interval 1, probability 0, space 0, times 0 [ 529.903818][T24928] CPU: 0 PID: 24928 Comm: syz-executor854 Not tainted syzkaller #0 [ 529.904997][T24928] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 529.906629][T24928] Call trace: [ 529.907167][T24928] dump_backtrace+0x0/0x43c [ 529.907884][T24928] show_stack+0x2c/0x3c [ 529.908590][T24928] __dump_stack+0x30/0x40 [ 529.909331][T24928] dump_stack_lvl+0xf8/0x160 [ 529.910087][T24928] dump_stack+0x1c/0x5c [ 529.910737][T24928] should_fail+0x3c0/0x51c [ 529.911503][T24928] __should_failslab+0xbc/0x10c [ 529.912280][T24928] should_failslab+0x10/0x28 [ 529.913043][T24928] slab_pre_alloc_hook+0x64/0xec [ 529.913843][T24928] kmem_cache_alloc+0x94/0x3e4 [ 529.914601][T24928] mempool_alloc_slab+0x58/0x74 [ 529.915398][T24928] mempool_alloc+0x144/0x3e8 [ 529.916122][T24928] bio_alloc_bioset+0x1e0/0x724 [ 529.916840][T24928] ext4_bio_write_page+0x1374/0x1dc8 [ 529.917637][T24928] ext4_writepages+0x1604/0x2c14 [ 529.918360][T24928] do_writepages+0x36c/0x578 [ 529.919084][T24928] filemap_fdatawrite_wbc+0x1d4/0x234 [ 529.919975][T24928] filemap_flush+0xa8/0xec [ 529.920661][T24928] ext4_alloc_da_blocks+0x11c/0x2e8 [ 529.921454][T24928] ext4_release_file+0x68/0x2dc [ 529.922261][T24928] __fput+0x1c0/0x7f8 [ 529.922880][T24928] ____fput+0x20/0x30 [ 529.923581][T24928] task_work_run+0x12c/0x1e0 [ 529.924329][T24928] do_exit+0x684/0x1f58 [ 529.924986][T24928] do_group_exit+0x100/0x268 [ 529.925668][T24928] get_signal+0x73c/0x1340 [ 529.926339][T24928] do_notify_resume+0x35c/0x3128 [ 529.927072][T24928] el0_svc+0xf0/0x1e0 [ 529.927741][T24928] el0t_64_sync_handler+0xcc/0xe4 [ 529.928595][T24928] el0t_64_sync+0x1a0/0x1a4 [ 529.966173][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 530.128584][T24936] loop2: detected capacity change from 0 to 32768 [ 530.140722][T24936] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24936) [ 530.165553][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 530.221806][T24937] loop3: detected capacity change from 0 to 32768 [ 530.233523][T24937] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24937) [ 530.255827][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 530.310997][T24943] loop0: detected capacity change from 0 to 32768 [ 530.332307][T24943] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24943) [ 530.345570][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 530.479071][T24942] loop4: detected capacity change from 0 to 32768 [ 530.490122][T24942] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24942) [ 530.499621][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 530.584369][T24941] loop1: detected capacity change from 0 to 32768 [ 530.604708][T24941] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24941) [ 530.638382][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 530.980702][T24951] loop3: detected capacity change from 0 to 32768 [ 530.989931][T24948] loop2: detected capacity change from 0 to 32768 [ 530.990332][T24951] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24951) [ 530.995788][T24948] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24948) [ 531.025649][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 531.045472][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 531.096834][T24958] loop1: detected capacity change from 0 to 32768 [ 531.136017][T24958] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24958) [ 531.160636][T24953] loop0: detected capacity change from 0 to 32768 [ 531.170029][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 531.185716][T24953] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24953) [ 531.201189][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 531.293334][T24955] loop4: detected capacity change from 0 to 32768 [ 531.303287][T24955] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24955) [ 531.348407][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 531.597495][T24969] loop1: detected capacity change from 0 to 32768 [ 531.607587][T24967] loop2: detected capacity change from 0 to 32768 [ 531.617137][T24971] loop0: detected capacity change from 0 to 32768 [ 531.622685][T24969] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24969) [ 531.634116][T24967] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24967) [ 531.649089][T24966] loop3: detected capacity change from 0 to 32768 [ 531.650937][T24971] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24971) [ 531.663912][T24966] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24966) [ 531.677457][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 531.696049][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 531.715829][ T4312] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4312) [ 531.872178][T24974] loop4: detected capacity change from 0 to 32768 [ 531.879571][T24974] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24974) [ 531.911325][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 531.929799][T24978] loop1: detected capacity change from 0 to 32768 [ 531.935592][T24978] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24978) [ 531.974317][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 532.262064][T24984] loop0: detected capacity change from 0 to 32768 [ 532.285872][T24984] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24984) [ 532.308250][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 532.328390][T24980] loop2: detected capacity change from 0 to 32768 [ 532.343373][T24980] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24980) [ 532.365419][T24982] loop3: detected capacity change from 0 to 32768 [ 532.369030][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 532.379865][T24982] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24982) [ 532.421687][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 532.438597][T24987] loop4: detected capacity change from 0 to 32768 [ 532.452845][T24987] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (24987) [ 532.457356][T24989] loop1: detected capacity change from 0 to 32768 [ 532.478231][T24989] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (24989) [ 532.504181][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 532.523730][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 532.846150][T25001] loop4: detected capacity change from 0 to 32768 [ 532.864269][T25001] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25001) [ 532.873187][T24995] loop0: detected capacity change from 0 to 32768 [ 532.895396][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 532.899580][T24995] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (24995) [ 532.901594][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 532.929581][T25003] loop1: detected capacity change from 0 to 32768 [ 532.932563][T25003] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25003) [ 532.967907][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 533.000044][T24999] loop3: detected capacity change from 0 to 32768 [ 533.014368][T24999] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (24999) [ 533.075693][ T4312] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4312) [ 533.085691][T24998] loop2: detected capacity change from 0 to 32768 [ 533.105123][T24998] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (24998) [ 533.138293][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 533.328509][T25013] loop0: detected capacity change from 0 to 32768 [ 533.341447][T25013] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25013) [ 533.357980][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 533.387314][T25015] loop3: detected capacity change from 0 to 32768 [ 533.401815][T25015] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25015) [ 533.435949][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 533.571090][T25011] loop4: detected capacity change from 0 to 32768 [ 533.584699][T25011] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25011) [ 533.590045][T25009] loop1: detected capacity change from 0 to 32768 [ 533.613472][T25009] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25009) [ 533.635023][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 533.644334][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 533.785879][T25017] loop2: detected capacity change from 0 to 32768 [ 533.793587][T25017] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25017) [ 533.817064][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 533.929921][T25022] loop3: detected capacity change from 0 to 32768 [ 533.941716][T25022] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25022) [ 533.956448][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 533.998218][T25019] loop0: detected capacity change from 0 to 32768 [ 534.009368][T25019] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25019) [ 534.045495][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 534.059109][T25030] loop1: detected capacity change from 0 to 32768 [ 534.075874][T25028] loop4: detected capacity change from 0 to 32768 [ 534.077237][T25030] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25030) [ 534.102366][T25028] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25028) [ 534.117752][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 534.131203][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 534.412870][T25032] loop2: detected capacity change from 0 to 32768 [ 534.432572][T25032] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25032) [ 534.448212][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 534.573858][T25038] loop1: detected capacity change from 0 to 32768 [ 534.596243][T25038] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25038) [ 534.603586][T25036] loop0: detected capacity change from 0 to 32768 [ 534.621007][T25036] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25036) [ 534.626257][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 534.651582][T25034] loop3: detected capacity change from 0 to 32768 [ 534.655776][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 534.663565][T25034] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25034) [ 534.684221][T25043] loop4: detected capacity change from 0 to 32768 [ 534.701322][T25043] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25043) [ 534.747590][ T4312] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4312) [ 534.759312][ T4845] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4845) [ 535.052568][T25052] loop3: detected capacity change from 0 to 32768 [ 535.077807][T25052] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25052) [ 535.083263][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 535.099779][T25046] loop2: detected capacity change from 0 to 32768 [ 535.105025][T25056] loop4: detected capacity change from 0 to 32768 [ 535.114244][T25046] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25046) [ 535.128994][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 535.147243][T25056] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25056) [ 535.165564][T25046] FAULT_INJECTION: forcing a failure. [ 535.165564][T25046] name failslab, interval 1, probability 0, space 0, times 0 [ 535.173658][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 535.184236][T25046] CPU: 1 PID: 25046 Comm: syz-executor854 Not tainted syzkaller #0 [ 535.185417][T25046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 535.186894][T25046] Call trace: [ 535.187378][T25046] dump_backtrace+0x0/0x43c [ 535.188029][T25046] show_stack+0x2c/0x3c [ 535.188610][T25046] __dump_stack+0x30/0x40 [ 535.189231][T25046] dump_stack_lvl+0xf8/0x160 [ 535.189981][T25046] dump_stack+0x1c/0x5c [ 535.190646][T25046] should_fail+0x3c0/0x51c [ 535.191361][T25046] __should_failslab+0xbc/0x10c [ 535.192146][T25046] should_failslab+0x10/0x28 [ 535.192891][T25046] slab_pre_alloc_hook+0x64/0xec [ 535.193705][T25046] __kmalloc+0xbc/0x44c [ 535.194355][T25046] mempool_kmalloc+0x28/0x38 [ 535.195096][T25046] mempool_alloc+0x144/0x3e8 [ 535.195817][T25046] nvme_queue_rq+0xc3c/0x2a84 [ 535.196613][T25046] __blk_mq_try_issue_directly+0x3e8/0x69c [ 535.197567][T25046] blk_mq_try_issue_list_directly+0x184/0x494 [ 535.198478][T25046] blk_mq_sched_insert_requests+0x300/0x73c [ 535.199471][T25046] blk_mq_flush_plug_list+0x4d4/0x74c [ 535.200348][T25046] blk_flush_plug_list+0x318/0x370 [ 535.201184][T25046] blk_finish_plug+0x68/0x90 [ 535.201882][T25046] ext4_writepages+0x2118/0x2c14 [ 535.202586][T25046] do_writepages+0x36c/0x578 [ 535.203335][T25046] filemap_fdatawrite_wbc+0x1d4/0x234 [ 535.204159][T25046] filemap_flush+0xa8/0xec [ 535.204821][T25046] ext4_alloc_da_blocks+0x11c/0x2e8 [ 535.205602][T25046] ext4_release_file+0x68/0x2dc [ 535.206366][T25046] __fput+0x1c0/0x7f8 [ 535.207011][T25046] ____fput+0x20/0x30 [ 535.207648][T25046] task_work_run+0x12c/0x1e0 [ 535.208142][T25048] loop0: detected capacity change from 0 to 32768 [ 535.208358][T25046] do_exit+0x684/0x1f58 [ 535.208373][T25046] do_group_exit+0x100/0x268 [ 535.210828][T25046] get_signal+0x73c/0x1340 [ 535.211575][T25046] do_notify_resume+0x35c/0x3128 [ 535.212367][T25046] el0_svc+0xf0/0x1e0 [ 535.213006][T25046] el0t_64_sync_handler+0xcc/0xe4 [ 535.213841][T25046] el0t_64_sync+0x1a0/0x1a4 [ 535.225751][T25048] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25048) [ 535.241311][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 535.282455][T25052] FAULT_INJECTION: forcing a failure. [ 535.282455][T25052] name fail_page_alloc, interval 1, probability 0, space 0, times 0 [ 535.284558][T25052] CPU: 0 PID: 25052 Comm: syz-executor854 Not tainted syzkaller #0 [ 535.285816][T25052] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 535.287324][T25052] Call trace: [ 535.287848][T25052] dump_backtrace+0x0/0x43c [ 535.288591][T25052] show_stack+0x2c/0x3c [ 535.289213][T25052] __dump_stack+0x30/0x40 [ 535.289932][T25052] dump_stack_lvl+0xf8/0x160 [ 535.290713][T25052] dump_stack+0x1c/0x5c [ 535.291376][T25052] should_fail+0x3c0/0x51c [ 535.292059][T25052] should_fail_alloc_page+0x74/0xa8 [ 535.292826][T25052] prepare_alloc_pages+0x160/0x460 [ 535.293631][T25052] __alloc_pages+0x108/0x470 [ 535.294377][T25052] alloc_pages+0x34c/0x5c0 [ 535.295075][T25052] __get_free_pages+0x18/0x84 [ 535.295814][T25052] __tlb_remove_page_size+0x1cc/0x388 [ 535.296625][T25052] unmap_page_range+0xc80/0x1958 [ 535.297354][T25052] unmap_single_vma+0x13c/0x1e4 [ 535.298126][T25052] unmap_vmas+0x104/0x200 [ 535.298330][T25053] loop1: detected capacity change from 0 to 32768 [ 535.298758][T25052] exit_mmap+0x2a8/0x4e0 [ 535.300466][T25052] __mmput+0xec/0x3b8 [ 535.301083][T25052] mmput+0x80/0xc8 [ 535.301684][T25052] exit_mm+0x4a0/0x684 [ 535.302302][T25052] do_exit+0x4ec/0x1f58 [ 535.302932][T25052] do_group_exit+0x100/0x268 [ 535.303583][T25052] get_signal+0x73c/0x1340 [ 535.304297][T25052] do_notify_resume+0x35c/0x3128 [ 535.305074][T25052] el0_svc+0xf0/0x1e0 [ 535.305761][T25052] el0t_64_sync_handler+0xcc/0xe4 [ 535.306551][T25052] el0t_64_sync+0x1a0/0x1a4 [ 535.317325][T25053] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25053) [ 535.580809][T25071] loop1: detected capacity change from 0 to 32768 [ 535.598932][T25071] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25071) [ 535.613436][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 535.685874][T25064] loop0: detected capacity change from 0 to 32768 [ 535.749877][T25064] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25064) [ 535.756854][T25067] loop3: detected capacity change from 0 to 32768 [ 535.771788][T25067] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25067) [ 535.780435][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 535.784662][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 535.914019][T25059] loop2: detected capacity change from 0 to 32768 [ 535.924241][T25059] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25059) [ 535.945642][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 535.968031][T25062] loop4: detected capacity change from 0 to 32768 [ 535.978287][T25062] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25062) [ 536.003598][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 536.109648][T25073] loop1: detected capacity change from 0 to 32768 [ 536.122181][T25073] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25073) [ 536.146876][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 536.288445][T25076] loop3: detected capacity change from 0 to 32768 [ 536.303455][T25076] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25076) [ 536.320599][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 536.328537][T25077] loop0: detected capacity change from 0 to 32768 [ 536.333680][T25077] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25077) [ 536.354259][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 536.589514][T25084] loop1: detected capacity change from 0 to 32768 [ 536.592059][T25079] loop2: detected capacity change from 0 to 32768 [ 536.598181][T25079] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25079) [ 536.614197][T25084] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25084) [ 536.628119][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 536.629892][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 536.664293][T25081] loop4: detected capacity change from 0 to 32768 [ 536.672043][T25081] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25081) [ 536.703533][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 536.775028][T25091] loop0: detected capacity change from 0 to 32768 [ 536.790336][T25091] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25091) [ 536.823643][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 536.890980][T25090] loop3: detected capacity change from 0 to 32768 [ 536.912184][T25090] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25090) [ 536.945061][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 537.058303][T25097] loop4: detected capacity change from 0 to 32768 [ 537.068561][T25097] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25097) [ 537.080926][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 537.205231][T25103] loop3: detected capacity change from 0 to 32768 [ 537.217880][T25103] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25103) [ 537.227274][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 537.259477][T25094] loop2: detected capacity change from 0 to 32768 [ 537.265818][T25094] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25094) [ 537.286798][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 537.337071][T25096] loop1: detected capacity change from 0 to 32768 [ 537.351530][T25096] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25096) [ 537.394331][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 537.467662][T25108] loop3: detected capacity change from 0 to 32768 [ 537.475134][T25108] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25108) [ 537.519455][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 537.561751][T25100] loop0: detected capacity change from 0 to 32768 [ 537.593130][T25100] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25100) [ 537.627189][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 537.782709][T25112] loop1: detected capacity change from 0 to 32768 [ 537.795143][T25112] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25112) [ 537.805216][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 537.856137][T25106] loop4: detected capacity change from 0 to 32768 [ 537.873491][T25106] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25106) [ 537.894909][T25114] loop3: detected capacity change from 0 to 32768 [ 537.904303][T25114] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25114) [ 537.916620][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 537.918374][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 538.075401][T25110] loop2: detected capacity change from 0 to 32768 [ 538.084688][T25110] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25110) [ 538.108962][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 538.200217][T25119] loop0: detected capacity change from 0 to 32768 [ 538.213343][T25119] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25119) [ 538.245795][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 538.431231][T25124] loop3: detected capacity change from 0 to 32768 [ 538.436390][T25125] loop4: detected capacity change from 0 to 32768 [ 538.437777][T25124] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25124) [ 538.450527][T25125] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25125) [ 538.459838][T25121] loop1: detected capacity change from 0 to 32768 [ 538.464909][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 538.466933][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 538.472049][T25121] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25121) [ 538.494465][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 538.662089][T25127] loop2: detected capacity change from 0 to 32768 [ 538.681245][T25127] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25127) [ 538.690028][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 538.836520][T25136] loop1: detected capacity change from 0 to 32768 [ 538.852632][T25136] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25136) [ 538.862724][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 538.961949][T25132] loop0: detected capacity change from 0 to 32768 [ 538.975205][T25132] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25132) [ 538.992694][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 539.091130][T25134] loop3: detected capacity change from 0 to 32768 [ 539.106804][T25134] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25134) [ 539.124558][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 539.254363][T25140] loop2: detected capacity change from 0 to 32768 [ 539.255231][T25138] loop4: detected capacity change from 0 to 32768 [ 539.267626][T25140] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25140) [ 539.286038][T25138] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25138) [ 539.294223][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 539.302622][T25138] FAULT_INJECTION: forcing a failure. [ 539.302622][T25138] name fail_futex, interval 1, probability 0, space 0, times 0 [ 539.307232][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 539.307327][T25138] CPU: 1 PID: 25138 Comm: syz-executor854 Not tainted syzkaller #0 [ 539.310043][T25138] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 539.311651][T25138] Call trace: [ 539.312169][T25138] dump_backtrace+0x0/0x43c [ 539.312893][T25138] show_stack+0x2c/0x3c [ 539.313566][T25138] __dump_stack+0x30/0x40 [ 539.314222][T25138] dump_stack_lvl+0xf8/0x160 [ 539.314952][T25138] dump_stack+0x1c/0x5c [ 539.315681][T25138] should_fail+0x3c0/0x51c [ 539.316397][T25138] get_futex_key+0x658/0xb90 [ 539.317102][T25138] futex_wake+0xf4/0x4f4 [ 539.317783][T25138] do_futex+0x1684/0x257c [ 539.318442][T25138] mm_release+0x1f8/0x314 [ 539.319099][T25138] exit_mm_release+0x30/0x40 [ 539.319832][T25138] exit_mm+0xa4/0x684 [ 539.320470][T25138] do_exit+0x4ec/0x1f58 [ 539.321139][T25138] do_group_exit+0x100/0x268 [ 539.321920][T25138] get_signal+0x73c/0x1340 [ 539.322636][T25138] do_notify_resume+0x35c/0x3128 [ 539.323449][T25138] el0_svc+0xf0/0x1e0 [ 539.324068][T25138] el0t_64_sync_handler+0xcc/0xe4 [ 539.324822][T25138] el0t_64_sync+0x1a0/0x1a4 [ 539.432093][T25146] loop0: detected capacity change from 0 to 32768 [ 539.446837][T25146] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25146) [ 539.478268][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 539.607895][T25143] loop1: detected capacity change from 0 to 32768 [ 539.613349][T25143] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25143) [ 539.632841][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 539.676181][T25156] loop0: detected capacity change from 0 to 32768 [ 539.691449][T25156] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25156) [ 539.716142][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 539.760682][T25150] loop3: detected capacity change from 0 to 32768 [ 539.772804][T25150] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25150) [ 539.825537][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 539.880084][T25153] loop2: detected capacity change from 0 to 32768 [ 539.883049][T25153] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25153) [ 539.922647][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 540.147595][T25154] loop4: detected capacity change from 0 to 32768 [ 540.155332][T25154] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25154) [ 540.175650][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 540.236654][T25158] loop1: detected capacity change from 0 to 32768 [ 540.246749][T25158] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25158) [ 540.251084][T25163] loop3: detected capacity change from 0 to 32768 [ 540.270300][T25163] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25163) [ 540.282750][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 540.306207][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 540.350822][T25160] loop0: detected capacity change from 0 to 32768 [ 540.373927][T25160] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25160) [ 540.402467][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 540.526247][T25165] loop2: detected capacity change from 0 to 32768 [ 540.548784][T25165] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25165) [ 540.572925][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 540.676672][T25174] loop3: detected capacity change from 0 to 32768 [ 540.680361][T25174] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25174) [ 540.702531][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 540.776986][T25170] loop4: detected capacity change from 0 to 32768 [ 540.783443][T25170] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25170) [ 540.803924][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 540.877913][T25173] loop1: detected capacity change from 0 to 32768 [ 540.898545][T25173] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25173) [ 540.914249][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 541.025315][T25177] loop0: detected capacity change from 0 to 32768 [ 541.043942][T25177] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25177) [ 541.060915][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 541.092991][T25181] loop2: detected capacity change from 0 to 32768 [ 541.107047][T25181] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25181) [ 541.134014][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 541.294399][T25183] loop3: detected capacity change from 0 to 32768 [ 541.310548][T25183] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25183) [ 541.318688][T25194] loop2: detected capacity change from 0 to 32768 [ 541.330429][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 541.332370][T25194] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25194) [ 541.345941][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 541.435807][T25185] loop4: detected capacity change from 0 to 32768 [ 541.442135][T25185] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25185) [ 541.484541][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 541.601468][T25189] loop1: detected capacity change from 0 to 32768 [ 541.617872][T25189] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25189) [ 541.648432][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 541.737050][T25192] loop0: detected capacity change from 0 to 32768 [ 541.749857][T25192] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25192) [ 541.769589][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 542.063821][T25196] loop2: detected capacity change from 0 to 32768 [ 542.074029][T25196] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25196) [ 542.080910][T25201] loop3: detected capacity change from 0 to 32768 [ 542.107846][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 542.121261][T25201] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25201) [ 542.128994][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 542.136001][T25199] loop4: detected capacity change from 0 to 32768 [ 542.145169][T25199] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25199) [ 542.155656][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 542.295275][T25206] loop1: detected capacity change from 0 to 32768 [ 542.307975][T25206] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25206) [ 542.328553][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 542.390700][T25214] loop2: detected capacity change from 0 to 32768 [ 542.396954][T25214] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25214) [ 542.418509][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 542.551628][T25222] loop2: detected capacity change from 0 to 32768 [ 542.563729][T25222] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25222) [ 542.573310][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 542.662798][T25208] loop0: detected capacity change from 0 to 32768 [ 542.674344][T25208] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25208) [ 542.699352][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 542.779602][T25220] loop1: detected capacity change from 0 to 32768 [ 542.781756][T25220] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25220) [ 543.067175][T25224] loop2: detected capacity change from 0 to 32768 [ 543.080958][T25216] loop4: detected capacity change from 0 to 32768 [ 543.081070][T25212] FAULT_INJECTION: forcing a failure. [ 543.081070][T25212] name failslab, interval 1, probability 0, space 0, times 0 [ 543.086697][T25212] CPU: 1 PID: 25212 Comm: syz-executor854 Not tainted syzkaller #0 [ 543.087923][T25212] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 543.089452][T25212] Call trace: [ 543.089964][T25212] dump_backtrace+0x0/0x43c [ 543.090699][T25212] show_stack+0x2c/0x3c [ 543.090752][T25224] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25224) [ 543.091340][T25212] __dump_stack+0x30/0x40 [ 543.093758][T25212] dump_stack_lvl+0xf8/0x160 [ 543.094516][T25212] dump_stack+0x1c/0x5c [ 543.095151][T25212] should_fail+0x3c0/0x51c [ 543.095900][T25212] __should_failslab+0xbc/0x10c [ 543.096664][T25212] should_failslab+0x10/0x28 [ 543.097341][T25212] slab_pre_alloc_hook+0x64/0xec [ 543.097963][T25229] loop1: detected capacity change from 0 to 32768 [ 543.098095][T25212] __kmalloc+0xbc/0x44c [ 543.099719][T25212] mempool_kmalloc+0x28/0x38 [ 543.100382][T25212] mempool_alloc+0x144/0x3e8 [ 543.101051][T25212] nvme_queue_rq+0xc3c/0x2a84 [ 543.101734][T25212] __blk_mq_try_issue_directly+0x3e8/0x69c [ 543.102556][T25212] blk_mq_try_issue_list_directly+0x184/0x494 [ 543.103501][T25212] blk_mq_sched_insert_requests+0x300/0x73c [ 543.104415][T25212] blk_mq_flush_plug_list+0x4d4/0x74c [ 543.105296][T25212] blk_flush_plug_list+0x318/0x370 [ 543.106091][T25212] blk_finish_plug+0x68/0x90 [ 543.106823][T25212] ext4_writepages+0x2118/0x2c14 [ 543.107616][T25212] do_writepages+0x36c/0x578 [ 543.108330][T25212] filemap_fdatawrite_wbc+0x1d4/0x234 [ 543.109191][T25212] filemap_flush+0xa8/0xec [ 543.109896][T25212] ext4_alloc_da_blocks+0x11c/0x2e8 [ 543.110711][T25212] ext4_release_file+0x68/0x2dc [ 543.111480][T25212] __fput+0x1c0/0x7f8 [ 543.112093][T25212] ____fput+0x20/0x30 [ 543.112661][T25212] task_work_run+0x12c/0x1e0 [ 543.113426][T25212] do_exit+0x684/0x1f58 [ 543.114106][T25212] do_group_exit+0x100/0x268 [ 543.114914][T25212] get_signal+0x73c/0x1340 [ 543.115682][T25212] do_notify_resume+0x35c/0x3128 [ 543.115831][T25216] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25216) [ 543.116528][T25212] el0_svc+0xf0/0x1e0 [ 543.118324][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 543.118823][T25212] el0t_64_sync_handler+0xcc/0xe4 [ 543.118839][T25212] el0t_64_sync+0x1a0/0x1a4 [ 543.125284][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 543.131056][T25229] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25229) [ 543.144571][T25218] loop3: detected capacity change from 0 to 32768 [ 543.146692][T25218] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25218) [ 543.160819][T25216] FAULT_INJECTION: forcing a failure. [ 543.160819][T25216] name failslab, interval 1, probability 0, space 0, times 0 [ 543.162888][T25216] CPU: 0 PID: 25216 Comm: syz-executor854 Not tainted syzkaller #0 [ 543.164184][T25216] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 543.165786][T25216] Call trace: [ 543.166260][T25216] dump_backtrace+0x0/0x43c [ 543.166960][T25216] show_stack+0x2c/0x3c [ 543.167688][T25216] __dump_stack+0x30/0x40 [ 543.168412][T25216] dump_stack_lvl+0xf8/0x160 [ 543.169162][T25216] dump_stack+0x1c/0x5c [ 543.169887][T25216] should_fail+0x3c0/0x51c [ 543.170653][T25216] __should_failslab+0xbc/0x10c [ 543.171443][T25216] should_failslab+0x10/0x28 [ 543.172177][T25216] slab_pre_alloc_hook+0x64/0xec [ 543.172995][T25216] __kmalloc+0xbc/0x44c [ 543.173683][T25216] mempool_kmalloc+0x28/0x38 [ 543.174430][T25216] mempool_alloc+0x144/0x3e8 [ 543.175184][T25216] nvme_queue_rq+0xc3c/0x2a84 [ 543.175910][T25216] __blk_mq_try_issue_directly+0x3e8/0x69c [ 543.176850][T25216] blk_mq_try_issue_list_directly+0x184/0x494 [ 543.177905][T25216] blk_mq_sched_insert_requests+0x300/0x73c [ 543.178831][T25216] blk_mq_flush_plug_list+0x4d4/0x74c [ 543.178979][T25224] FAULT_INJECTION: forcing a failure. [ 543.178979][T25224] name fail_page_alloc, interval 1, probability 0, space 0, times 0 [ 543.179685][T25216] blk_flush_plug_list+0x318/0x370 [ 543.179703][T25216] blk_finish_plug+0x68/0x90 [ 543.179714][T25216] ext4_writepages+0x2118/0x2c14 [ 543.179721][T25216] do_writepages+0x36c/0x578 [ 543.184787][T25216] filemap_fdatawrite_wbc+0x1d4/0x234 [ 543.185609][T25216] filemap_flush+0xa8/0xec [ 543.186327][T25216] ext4_alloc_da_blocks+0x11c/0x2e8 [ 543.187143][T25216] ext4_release_file+0x68/0x2dc [ 543.187863][T25216] __fput+0x1c0/0x7f8 [ 543.188483][T25216] ____fput+0x20/0x30 [ 543.189111][T25216] task_work_run+0x12c/0x1e0 [ 543.189878][T25216] do_exit+0x684/0x1f58 [ 543.190499][T25216] do_group_exit+0x100/0x268 [ 543.191240][T25216] get_signal+0x73c/0x1340 [ 543.191927][T25216] do_notify_resume+0x35c/0x3128 [ 543.192708][T25216] el0_svc+0xf0/0x1e0 [ 543.193310][T25216] el0t_64_sync_handler+0xcc/0xe4 [ 543.194118][T25216] el0t_64_sync+0x1a0/0x1a4 [ 543.194899][T25224] CPU: 1 PID: 25224 Comm: syz-executor854 Not tainted syzkaller #0 [ 543.196075][T25224] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 543.197469][T25224] Call trace: [ 543.197911][T25224] dump_backtrace+0x0/0x43c [ 543.198551][T25224] show_stack+0x2c/0x3c [ 543.199181][T25224] __dump_stack+0x30/0x40 [ 543.199859][T25224] dump_stack_lvl+0xf8/0x160 [ 543.200561][T25224] dump_stack+0x1c/0x5c [ 543.201221][T25224] should_fail+0x3c0/0x51c [ 543.201965][T25224] should_fail_alloc_page+0x74/0xa8 [ 543.202751][T25224] prepare_alloc_pages+0x160/0x460 [ 543.203628][T25224] __alloc_pages+0x108/0x470 [ 543.204395][T25224] alloc_pages+0x34c/0x5c0 [ 543.205082][T25224] __get_free_pages+0x18/0x84 [ 543.205840][T25224] __tlb_remove_page_size+0x1cc/0x388 [ 543.206752][T25224] unmap_page_range+0xc80/0x1958 [ 543.207518][T25224] unmap_single_vma+0x13c/0x1e4 [ 543.208328][T25224] unmap_vmas+0x104/0x200 [ 543.209070][T25224] exit_mmap+0x2a8/0x4e0 [ 543.209745][T25224] __mmput+0xec/0x3b8 [ 543.210368][T25224] mmput+0x80/0xc8 [ 543.210980][T25224] exit_mm+0x4a0/0x684 [ 543.211687][T25224] do_exit+0x4ec/0x1f58 [ 543.212347][T25224] do_group_exit+0x100/0x268 [ 543.213111][T25224] get_signal+0x73c/0x1340 [ 543.213798][T25224] do_notify_resume+0x35c/0x3128 [ 543.214607][T25224] el0_svc+0xf0/0x1e0 [ 543.215194][T25224] el0t_64_sync_handler+0xcc/0xe4 [ 543.215992][T25224] el0t_64_sync+0x1a0/0x1a4 [ 543.541611][T25226] loop0: detected capacity change from 0 to 32768 [ 543.559151][T25226] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25226) [ 543.573824][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 543.762053][T25239] loop3: detected capacity change from 0 to 32768 [ 543.771341][T25239] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25239) [ 543.787228][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 543.799999][T25240] loop2: detected capacity change from 0 to 32768 [ 543.806282][T25240] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25240) [ 543.823280][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 543.940359][T25235] loop1: detected capacity change from 0 to 32768 [ 543.951552][T25235] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25235) [ 543.973280][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 544.103240][T25237] loop4: detected capacity change from 0 to 32768 [ 544.110469][T25250] loop3: detected capacity change from 0 to 32768 [ 544.114898][T25237] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25237) [ 544.130140][T25250] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25250) [ 544.138687][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 544.155768][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 544.202730][T25246] loop0: detected capacity change from 0 to 32768 [ 544.246718][T25246] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25246) [ 544.254947][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 544.429732][T25248] loop2: detected capacity change from 0 to 32768 [ 544.446023][T25248] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25248) [ 544.463176][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 544.491793][T25252] loop1: detected capacity change from 0 to 32768 [ 544.499448][T25252] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25252) [ 544.527502][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 544.673839][T25255] loop3: detected capacity change from 0 to 32768 [ 544.679254][T25255] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25255) [ 544.697838][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 544.875434][T25263] loop1: detected capacity change from 0 to 32768 [ 544.886019][T25263] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25263) [ 544.904509][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 544.966320][T25258] loop0: detected capacity change from 0 to 32768 [ 544.968564][T25266] loop2: detected capacity change from 0 to 32768 [ 544.984563][T25256] loop4: detected capacity change from 0 to 32768 [ 544.986094][T25258] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25258) [ 544.998046][T25266] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25266) [ 545.007766][T25256] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25256) [ 545.025200][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 545.031238][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 545.042337][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 545.231818][T25276] loop2: detected capacity change from 0 to 32768 [ 545.247823][T25276] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25276) [ 545.259019][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 545.296181][T25268] loop3: detected capacity change from 0 to 32768 [ 545.306677][T25268] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25268) [ 545.337964][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 545.598932][T25277] loop4: detected capacity change from 0 to 32768 [ 545.609572][T25277] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25277) [ 545.632856][ T4844] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4844) [ 545.708381][T25271] loop1: detected capacity change from 0 to 32768 [ 545.714833][T25271] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25271) [ 545.740161][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 545.766781][T25275] loop0: detected capacity change from 0 to 32768 [ 545.774099][T25275] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25275) [ 545.794727][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 545.926991][T25282] loop3: detected capacity change from 0 to 32768 [ 545.935778][T25282] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25282) [ 545.956033][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 546.035729][T25280] loop2: detected capacity change from 0 to 32768 [ 546.046438][T25280] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25280) [ 546.067896][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 546.091780][T25291] loop0: detected capacity change from 0 to 32768 [ 546.099492][T25291] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25291) [ 546.128765][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 546.240155][T25285] FAULT_INJECTION: forcing a failure. [ 546.240155][T25285] name failslab, interval 1, probability 0, space 0, times 0 [ 546.253549][T25285] CPU: 0 PID: 25285 Comm: syz-executor854 Not tainted syzkaller #0 [ 546.254869][T25285] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 546.256460][T25285] Call trace: [ 546.256956][T25285] dump_backtrace+0x0/0x43c [ 546.257693][T25285] show_stack+0x2c/0x3c [ 546.258352][T25285] __dump_stack+0x30/0x40 [ 546.259063][T25285] dump_stack_lvl+0xf8/0x160 [ 546.259834][T25285] dump_stack+0x1c/0x5c [ 546.260501][T25285] should_fail+0x3c0/0x51c [ 546.261223][T25285] __should_failslab+0xbc/0x10c [ 546.261982][T25285] should_failslab+0x10/0x28 [ 546.262714][T25285] slab_pre_alloc_hook+0x64/0xec [ 546.263514][T25285] __kmalloc+0xbc/0x44c [ 546.264191][T25285] mempool_kmalloc+0x28/0x38 [ 546.264917][T25285] mempool_alloc+0x144/0x3e8 [ 546.265625][T25285] nvme_queue_rq+0xc3c/0x2a84 [ 546.266289][T25285] __blk_mq_try_issue_directly+0x3e8/0x69c [ 546.267188][T25285] blk_mq_try_issue_list_directly+0x184/0x494 [ 546.268179][T25285] blk_mq_sched_insert_requests+0x300/0x73c [ 546.269127][T25285] blk_mq_flush_plug_list+0x4d4/0x74c [ 546.269970][T25285] blk_flush_plug_list+0x318/0x370 [ 546.270757][T25285] blk_finish_plug+0x68/0x90 [ 546.271505][T25285] ext4_writepages+0x2118/0x2c14 [ 546.272251][T25285] do_writepages+0x36c/0x578 [ 546.272969][T25285] filemap_fdatawrite_wbc+0x1d4/0x234 [ 546.273833][T25285] filemap_flush+0xa8/0xec [ 546.274501][T25285] ext4_alloc_da_blocks+0x11c/0x2e8 [ 546.275357][T25285] ext4_release_file+0x68/0x2dc [ 546.276129][T25285] __fput+0x1c0/0x7f8 [ 546.276761][T25285] ____fput+0x20/0x30 [ 546.277397][T25285] task_work_run+0x12c/0x1e0 [ 546.278139][T25285] do_exit+0x684/0x1f58 [ 546.278804][T25285] do_group_exit+0x100/0x268 [ 546.279580][T25285] get_signal+0x73c/0x1340 [ 546.280294][T25285] do_notify_resume+0x35c/0x3128 [ 546.281058][T25285] el0_svc+0xf0/0x1e0 [ 546.281649][T25285] el0t_64_sync_handler+0xcc/0xe4 [ 546.282446][T25285] el0t_64_sync+0x1a0/0x1a4 [ 546.299961][T25293] loop3: detected capacity change from 0 to 32768 [ 546.306303][T25293] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25293) [ 546.325028][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 546.365879][T25287] loop4: detected capacity change from 0 to 32768 [ 546.387777][T25287] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25287) [ 546.420329][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 546.425385][T25289] loop1: detected capacity change from 0 to 32768 [ 546.442999][T25289] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25289) [ 546.463915][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 546.644037][T25297] loop0: detected capacity change from 0 to 32768 [ 546.654642][T25297] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25297) [ 546.675070][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 546.807798][T25307] loop1: detected capacity change from 0 to 32768 [ 546.814823][T25307] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25307) [ 546.820834][T25298] loop2: detected capacity change from 0 to 32768 [ 546.833634][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 546.842805][T25298] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25298) [ 546.863787][T25305] loop4: detected capacity change from 0 to 32768 [ 546.869019][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 546.890236][T25305] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25305) [ 546.915327][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 546.960338][T25303] loop3: detected capacity change from 0 to 32768 [ 546.973507][T25303] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25303) [ 547.023295][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 547.244294][T25311] loop1: detected capacity change from 0 to 32768 [ 547.254384][T25311] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25311) [ 547.272498][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 547.301540][T25309] loop0: detected capacity change from 0 to 32768 [ 547.320024][T25309] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25309) [ 547.335680][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 547.473749][T25318] loop2: detected capacity change from 0 to 32768 [ 547.484090][T25318] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25318) [ 547.502375][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 547.610580][T25316] loop3: detected capacity change from 0 to 32768 [ 547.622898][T25316] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25316) [ 547.623352][T25325] loop0: detected capacity change from 0 to 32768 [ 547.632791][T25325] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25325) [ 547.646733][T25313] loop4: detected capacity change from 0 to 32768 [ 547.647911][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 547.656034][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 547.682497][T25313] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25313) [ 547.694762][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 547.877757][T25323] loop1: detected capacity change from 0 to 32768 [ 547.891045][T25323] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25323) [ 547.913409][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 548.065317][T25327] loop2: detected capacity change from 0 to 32768 [ 548.093903][T25327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25327) [ 548.117520][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 548.128013][T25331] loop3: detected capacity change from 0 to 32768 [ 548.143027][T25331] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25331) [ 548.159235][T25333] loop4: detected capacity change from 0 to 32768 [ 548.162623][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 548.190194][T25333] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25333) [ 548.235020][ T4842] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4842) [ 548.286402][T25329] loop0: detected capacity change from 0 to 32768 [ 548.301586][T25329] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25329) [ 548.327028][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 548.566656][T25338] loop1: detected capacity change from 0 to 32768 [ 548.593839][T25338] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25338) [ 548.603558][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 548.732710][T25344] loop4: detected capacity change from 0 to 32768 [ 548.744078][T25344] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25344) [ 548.762832][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 548.799891][T25346] loop0: detected capacity change from 0 to 32768 [ 548.809434][T25346] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25346) [ 548.845260][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 548.936239][T25340] loop2: detected capacity change from 0 to 32768 [ 548.951078][T25340] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25340) [ 548.996528][ T4842] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4842) [ 549.020472][T25351] loop1: detected capacity change from 0 to 32768 [ 549.039370][T25351] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25351) [ 549.070077][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 549.094078][T25343] loop3: detected capacity change from 0 to 32768 [ 549.104905][T25343] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25343) [ 549.165102][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 549.342237][T25362] loop1: detected capacity change from 0 to 32768 [ 549.347308][T25362] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25362) [ 549.369045][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 549.412640][T25354] loop4: detected capacity change from 0 to 32768 [ 549.417653][T25354] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25354) [ 549.459067][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 549.746981][T25358] loop2: detected capacity change from 0 to 32768 [ 549.762436][T25358] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25358) [ 549.785642][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 549.816502][T25369] loop4: detected capacity change from 0 to 32768 [ 549.829268][T25355] loop0: detected capacity change from 0 to 32768 [ 549.836103][T25355] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25355) [ 549.850679][T25369] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25369) [ 549.874459][T25364] loop3: detected capacity change from 0 to 32768 [ 549.892506][ T4842] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4842) [ 549.910126][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 549.974026][T25364] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25364) [ 550.139970][T25367] loop1: detected capacity change from 0 to 32768 [ 550.145322][T25367] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25367) [ 550.167505][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 550.295157][T25377] loop2: detected capacity change from 0 to 32768 [ 550.300977][T25376] loop0: detected capacity change from 0 to 32768 [ 550.320169][T25376] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25376) [ 550.349049][T25377] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25377) [ 550.353111][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 550.473478][T25379] loop4: detected capacity change from 0 to 32768 [ 550.480048][T25379] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25379) [ 550.657023][T25381] loop3: detected capacity change from 0 to 32768 [ 550.672797][T25381] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25381) [ 550.672914][T25383] loop1: detected capacity change from 0 to 32768 [ 550.689018][ T4327] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4327) [ 550.708983][T25383] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25383) [ 550.718573][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 550.902954][T25390] loop0: detected capacity change from 0 to 32768 [ 550.922597][T25390] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25390) [ 550.925110][T25391] loop2: detected capacity change from 0 to 32768 [ 550.943080][T25391] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25391) [ 550.957142][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 550.960095][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 551.085811][T25397] loop1: detected capacity change from 0 to 32768 [ 551.101654][T25397] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25397) [ 551.128232][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 551.233994][T25393] loop4: detected capacity change from 0 to 32768 [ 551.240228][T25393] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25393) [ 551.269255][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 551.292406][T25395] loop3: detected capacity change from 0 to 32768 [ 551.306567][T25395] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25395) [ 551.336478][ T4842] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4842) [ 551.512616][T25404] loop1: detected capacity change from 0 to 32768 [ 551.523299][T25404] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25404) [ 551.534080][ T4327] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4327) [ 551.566515][T25401] loop2: detected capacity change from 0 to 32768 [ 551.576920][T25401] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25401) [ 551.597268][ T4842] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4842) [ 551.624398][T25406] FAULT_INJECTION: forcing a failure. [ 551.624398][T25406] name fail_page_alloc, interval 1, probability 0, space 0, times 0 [ 551.636913][T25406] CPU: 0 PID: 25406 Comm: syz-executor854 Not tainted syzkaller #0 [ 551.638212][T25406] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 [ 551.639769][T25406] Call trace: [ 551.640285][T25406] dump_backtrace+0x0/0x43c [ 551.641024][T25406] show_stack+0x2c/0x3c [ 551.641634][T25406] __dump_stack+0x30/0x40 [ 551.642258][T25406] dump_stack_lvl+0xf8/0x160 [ 551.643067][T25406] dump_stack+0x1c/0x5c [ 551.643686][T25406] should_fail+0x3c0/0x51c [ 551.644352][T25406] should_fail_alloc_page+0x74/0xa8 [ 551.645153][T25406] prepare_alloc_pages+0x160/0x460 [ 551.646036][T25406] __alloc_pages+0x108/0x470 [ 551.646744][T25406] alloc_pages+0x34c/0x5c0 [ 551.647364][T25406] __get_free_pages+0x18/0x84 [ 551.648121][T25406] tlb_remove_table+0x12c/0x21c [ 551.648885][T25406] free_pgd_range+0x52c/0xc04 [ 551.649626][T25406] free_pgtables+0x23c/0x278 [ 551.650394][T25406] exit_mmap+0x2bc/0x4e0 [ 551.651045][T25406] __mmput+0xec/0x3b8 [ 551.651661][T25406] mmput+0x80/0xc8 [ 551.652219][T25406] exit_mm+0x4a0/0x684 [ 551.652813][T25406] do_exit+0x4ec/0x1f58 [ 551.653457][T25406] do_group_exit+0x100/0x268 [ 551.654154][T25406] get_signal+0x73c/0x1340 [ 551.654800][T25406] do_notify_resume+0x35c/0x3128 [ 551.655552][T25406] el0_svc+0xf0/0x1e0 [ 551.656140][T25406] el0t_64_sync_handler+0xcc/0xe4 [ 551.656936][T25406] el0t_64_sync+0x1a0/0x1a4 [ 551.681325][T25399] loop0: detected capacity change from 0 to 32768 [ 551.694746][T25399] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25399) [ 551.748463][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 551.959398][T25410] loop4: detected capacity change from 0 to 32768 [ 551.968720][T25410] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25410) [ 551.976688][T25411] loop3: detected capacity change from 0 to 32768 [ 551.993956][T25411] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25411) [ 552.013180][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 552.015281][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 552.121341][T25418] loop2: detected capacity change from 0 to 32768 [ 552.129814][T25418] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25418) [ 552.153714][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 552.169586][T25414] loop1: detected capacity change from 0 to 32768 [ 552.174342][T25414] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25414) [ 552.195680][ T4844] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4844) [ 552.295369][T25420] loop0: detected capacity change from 0 to 32768 [ 552.312104][T25420] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25420) [ 552.328753][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 552.606301][T25423] loop4: detected capacity change from 0 to 32768 [ 552.632521][T25423] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25423) [ 552.639251][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 552.652752][T25429] loop2: detected capacity change from 0 to 32768 [ 552.659949][T25429] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25429) [ 552.678632][ T4327] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4327) [ 552.698176][T25425] loop3: detected capacity change from 0 to 32768 [ 552.706714][T25425] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25425) [ 552.731069][T25428] loop1: detected capacity change from 0 to 32768 [ 552.751353][T25428] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25428) [ 552.762778][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 552.787217][ T4842] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by udevd (4842) [ 552.807722][T25432] loop0: detected capacity change from 0 to 32768 [ 552.817777][T25432] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25432) [ 552.854659][ T4327] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4327) [ 553.098452][T25440] loop3: detected capacity change from 0 to 32768 [ 553.107615][T25440] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor854 (25440) [ 553.125568][ T4844] BTRFS warning: duplicate device /dev/loop3 devid 1 generation 8 scanned by udevd (4844) [ 553.214853][T25446] loop0: detected capacity change from 0 to 32768 [ 553.227095][T25446] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor854 (25446) [ 553.243712][ T4844] BTRFS warning: duplicate device /dev/loop0 devid 1 generation 8 scanned by udevd (4844) [ 553.358371][T25444] loop4: detected capacity change from 0 to 32768 [ 553.376599][T25444] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor854 (25444) [ 553.397940][ T4327] BTRFS warning: duplicate device /dev/loop4 devid 1 generation 8 scanned by udevd (4327) [ 553.400691][T25437] loop2: detected capacity change from 0 to 32768 [ 553.413090][T25437] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor854 (25437) [ 553.433361][ T4844] BTRFS warning: duplicate device /dev/loop2 devid 1 generation 8 scanned by udevd (4844) [ 553.456198][T25442] loop1: detected capacity change from 0 to 32768 [ 553.478050][T25442] BTRFS warning: duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor854 (25442)