ci2 starts bisection 2023-03-28 00:07:22.834776931 +0000 UTC m=+11947.754565794 bisecting fixing commit since 493ffd6605b2d3d4dc7008ab927dba319f36671f building syzkaller on 4954e4b2cf1e777715d52521afd2d9772d96f160 ensuring issue is reproducible on original commit 493ffd6605b2d3d4dc7008ab927dba319f36671f testing commit 493ffd6605b2d3d4dc7008ab927dba319f36671f gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: a0370541037e4694b509c19cc002016d0b921b17eaea012a1e89e8bc8477cbdc run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #2: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #3: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #4: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #5: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #6: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #7: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #8: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #9: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #10: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #11: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #12: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #13: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #14: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #15: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #16: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #17: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #18: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot run #19: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot testing current HEAD 3a93e40326c8f470e71d20b4c42d36767450f38f testing commit 3a93e40326c8f470e71d20b4c42d36767450f38f gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e386296c279d39251b493016526227c725a392e9616d834bfe3ebbe177bf4674 all runs: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot revisions tested: 2, total time: 42m29.179799001s (build: 33m58.407279854s, test: 7m2.613168779s) the crash still happens on HEAD commit msg: Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm crash: UBSAN: array-index-out-of-bounds in dtSplitRoot loop0: detected capacity change from 0 to 32768 ================================================================================ UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type 'struct dtslot[128]' CPU: 0 PID: 5606 Comm: syz-executor.0 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: dump_stack_lvl+0x12e/0x1d0 __ubsan_handle_out_of_bounds+0xac/0xd0 dtSplitRoot+0x7e0/0x17a0 dtInsert+0xfed/0x6c80 jfs_mkdir+0x610/0x970 vfs_mkdir+0x1fc/0x370 do_mkdirat+0x24e/0x490 __x64_sys_mkdirat+0x84/0x90 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2f59a8b5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2f5ab49168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f2f59babf80 RCX: 00007f2f59a8b5a9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007f2f59ae6580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc08e401ff R14: 00007f2f5ab49300 R15: 0000000000022000 ================================================================================