ci2 starts bisection 2023-01-25 10:09:35.827343035 +0000 UTC m=+159666.807926460 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 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 8e2126bde431889da317d94fe1015f4dd0acd7ef525381fa0340ad75982374c5 run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot 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: SYZFATAL: executor failed NUM times: executor NUM: failed to write control pipe: write |NUM: broken pipe run #19: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot testing current HEAD 948ef7bb70c4acaf74d87420ea3a1190862d4548 testing commit 948ef7bb70c4acaf74d87420ea3a1190862d4548 gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 5d8a9b4b0ac2a3fd195c27a17de3b13213be56bfc7929788492f2c1a5cc4614d run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: failed to write control pipe: write |NUM: broken pipe run #1: crashed: UBSAN: array-index-out-of-bounds in dtSplitRoot 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 revisions tested: 2, total time: 38m55.868729938s (build: 30m5.807505328s, test: 6m54.680264605s) the crash still happens on HEAD commit msg: Merge tag 'modules-6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux 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: 1 PID: 5601 Comm: syz-executor.0 Not tainted 6.2.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x12a/0x1c0 lib/dump_stack.c:106 ubsan_epilogue lib/ubsan.c:151 [inline] __ubsan_handle_out_of_bounds+0xaf/0xe0 lib/ubsan.c:282 dtSplitRoot+0x7fa/0x1a60 fs/jfs/jfs_dtree.c:1971 dtSplitUp fs/jfs/jfs_dtree.c:985 [inline] dtInsert+0xf6f/0x6c10 fs/jfs/jfs_dtree.c:863 jfs_mkdir+0x601/0x950 fs/jfs/namei.c:270 vfs_mkdir+0x2d3/0x460 fs/namei.c:4036 do_mkdirat+0x20b/0x480 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x80/0x90 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f730fe8b5a9 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:00007f7310fbb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f730ffabf80 RCX: 00007f730fe8b5a9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007f730fee6580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2da1a74f R14: 00007f7310fbb300 R15: 0000000000022000 ================================================================================