ci2 starts bisection 2025-07-13 10:01:06.819103744 +0000 UTC m=+235176.055353649 bisecting fixing commit since 458ce51d0356ee60c93f9f807d9827cf2a41643d building syzkaller on 55d6f11d1578896a20515e21906295fcf2c126aa ensuring issue is reproducible on original commit 458ce51d0356ee60c93f9f807d9827cf2a41643d testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 67d0f0e11e1c93085f3ded42d9ed1a261f2f78dcb4c8a2946420e52707e8b239 all runs: crashed: WARNING: bad unlock balance in unlock_two_nondirectories representative crash: WARNING: bad unlock balance in unlock_two_nondirectories, types: [LOCKDEP] check whether we can drop unnecessary instrumentation disabling configs for [memleak ubsan bug_or_warning kasan atomic_sleep hang], they are not needed testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: f05e5e2711323f5b31e070a9f3acc52c8f0c8a271bf0bb95aeb89e4914d5cc52 all runs: crashed: WARNING: bad unlock balance in unlock_two_nondirectories representative crash: WARNING: bad unlock balance in unlock_two_nondirectories, types: [LOCKDEP] the bug reproduces without the instrumentation disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed kconfig minimization: base=3707 full=7265 leaves diff=1983 split chunks (needed=false): <1983> split chunk #0 of len 1983 into 5 parts testing without sub-chunk 1/5 disabling configs for [memleak ubsan bug_or_warning kasan atomic_sleep hang], they are not needed testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: ad5cd91ea198b48a7f1516a4ace492ba855441d018c0a5b67033109edaf2251e all runs: crashed: WARNING: bad unlock balance in unlock_two_nondirectories representative crash: WARNING: bad unlock balance in unlock_two_nondirectories, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan bug_or_warning kasan atomic_sleep], they are not needed testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4936a801f8005b71de153c331a349f8951a2d55752bdb89866c1cd234d75674c all runs: crashed: WARNING: bad unlock balance in unlock_two_nondirectories representative crash: WARNING: bad unlock balance in unlock_two_nondirectories, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 363f89f7d742048acdbacb2a00c56ccdd5d8bbbc80fbca553383ee6800cf3c86 all runs: crashed: WARNING: bad unlock balance in __ext4_ioctl representative crash: WARNING: bad unlock balance in __ext4_ioctl, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7f58e02f0904b6fadc8664bff55237d400c10ccde0756f487d2714aeea7441cd all runs: crashed: WARNING: bad unlock balance in __ext4_ioctl representative crash: WARNING: bad unlock balance in __ext4_ioctl, types: [LOCKDEP] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [memleak ubsan bug_or_warning kasan atomic_sleep hang], they are not needed testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1ec857e96c9616f9cb4a0e70f7fa7ba74c2c64f6750cc927579f0a0aa1538fbc all runs: crashed: WARNING: bad unlock balance in __ext4_ioctl representative crash: WARNING: bad unlock balance in __ext4_ioctl, types: [LOCKDEP] the chunk can be dropped disabling configs for [bug_or_warning kasan atomic_sleep hang memleak ubsan], they are not needed testing current HEAD 2f693b60754599cbe248b385e7bf939c72f3e30e testing commit 2f693b60754599cbe248b385e7bf939c72f3e30e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b635d0224318af2ccccb43f270658f53b15819c1a74b744db6d9154d5dc61b7f all runs: crashed: WARNING: bad unlock balance in __ext4_ioctl representative crash: WARNING: bad unlock balance in __ext4_ioctl, types: [LOCKDEP] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h38m52.371407162s (build: 54m17.004872638s, test: 41m8.242219713s) crash still not fixed or there were kernel test errors commit msg: Linux 5.15.187 crash: WARNING: bad unlock balance in __ext4_ioctl EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem without journal. Opts: jqfmt=vfsold,resgid=0x000000000000ee00,bh,noload,data_err=ignore,usrjquota=,,errors=continue. Quota mode: none. ===================================== WARNING: bad unlock balance detected! 5.15.187-syzkaller #0 Not tainted ------------------------------------- syz-executor.0/1478 is trying to release lock (&type->i_mutex_dir_key) at: [] swap_inode_boot_loader fs/ext4/ioctl.c:262 [inline] [] __ext4_ioctl+0x99e/0x12e0 fs/ext4/ioctl.c:1056 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz-executor.0/1478: #0: ffff888107588438 (sb_writers#13){.+.+}-{0:0}, at: __ext4_ioctl+0x583/0x12e0 fs/ext4/ioctl.c:1053 stack backtrace: CPU: 0 PID: 1478 Comm: syz-executor.0 Not tainted 5.15.187-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 print_unlock_imbalance_bug kernel/locking/lockdep.c:5529 [inline] __lock_release kernel/locking/lockdep.c:5302 [inline] lock_release.cold+0xe/0x26 kernel/locking/lockdep.c:5643 up_write+0x12/0xc0 kernel/locking/rwsem.c:1603 swap_inode_boot_loader fs/ext4/ioctl.c:262 [inline] __ext4_ioctl+0x99e/0x12e0 fs/ext4/ioctl.c:1056 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x7b/0xb0 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f85da4d0da9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f85da0520c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f85da5fef80 RCX: 00007f85da4d0da9 RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000004 RBP: 00007f85da51d47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f85da5fef80 R15: 00007ffedca75a48