lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 14 Dec 2017 23:37:00 -0800 From: syzbot <bot+118d758e6670956425a5384acd064695670f84c2@...kaller.appspotmail.com> To: davem@...emloft.net, kuznet@....inr.ac.ru, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com, yoshfuji@...ux-ipv6.org Subject: WARNING: bad unlock balance detected! Hello, syzkaller hit the following crash on 50c4c4e268a2d7a3e58ebb698ac74da0de40ae36 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master compiler: gcc (GCC) 7.1.1 20170620 .config is attached Raw console output is attached. Unfortunately, I don't have any reproducer for this bug yet. ===================================== WARNING: bad unlock balance detected! 4.15.0-rc3+ #217 Not tainted ------------------------------------- syz-executor3/19522 is trying to release lock (mrt_lock) at: [<00000000adc671f1>] ipmr_mfc_seq_stop+0xe1/0x130 net/ipv6/ip6mr.c:553 but there are no more locks to release! other info that might help us debug this: 2 locks held by syz-executor3/19522: #0: (&f->f_pos_lock){+.+.}, at: [<00000000cd36f0f9>] __fdget_pos+0x131/0x1a0 fs/file.c:770 #1: (&p->lock){+.+.}, at: [<00000000c93d2595>] seq_lseek+0x58/0x3c0 fs/seq_file.c:321 stack backtrace: CPU: 0 PID: 19522 Comm: syz-executor3 Not tainted 4.15.0-rc3+ #217 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_unlock_imbalance_bug+0x12f/0x140 kernel/locking/lockdep.c:3561 __lock_release kernel/locking/lockdep.c:3775 [inline] lock_release+0x5f9/0xda0 kernel/locking/lockdep.c:4023 __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline] _raw_read_unlock+0x1a/0x30 kernel/locking/spinlock.c:255 ipmr_mfc_seq_stop+0xe1/0x130 net/ipv6/ip6mr.c:553 traverse+0x3bc/0xa00 fs/seq_file.c:135 seq_lseek+0x136/0x3c0 fs/seq_file.c:331 proc_reg_llseek+0xf1/0x160 fs/proc/inode.c:203 vfs_llseek fs/read_write.c:300 [inline] SYSC_lseek fs/read_write.c:313 [inline] SyS_lseek+0xf1/0x170 fs/read_write.c:304 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fda08e4bc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000008 RAX: ffffffffffffffda RBX: 00007fda08e4c700 RCX: 0000000000452a39 RDX: 0000000000000001 RSI: 0000000000000020 RDI: 0000000000000013 RBP: 0000000000a6f880 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a6f7ff R14: 00007fda08e4c9c0 R15: 0000000000000002 BUG: scheduling while atomic: syz-executor3/19522/0x00000000 INFO: lockdep is turned off. Modules linked in: Kernel panic - not syncing: scheduling while atomic CPU: 0 PID: 19522 Comm: syz-executor3 Not tainted 4.15.0-rc3+ #217 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 panic+0x1e4/0x41c kernel/panic.c:183 __schedule_bug+0x11f/0x130 kernel/sched/core.c:3177 schedule_debug kernel/sched/core.c:3194 [inline] __schedule+0x131c/0x2060 kernel/sched/core.c:3299 schedule+0xf5/0x430 kernel/sched/core.c:3434 exit_to_usermode_loop+0x1d1/0x310 arch/x86/entry/common.c:151 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264 entry_SYSCALL_64_fastpath+0x94/0x96 RIP: 0033:0x452a39 RSP: 002b:00007fda08e4bc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000008 RAX: 0000000000000040 RBX: 00000000007580d8 RCX: 0000000000452a39 RDX: 0000000000000001 RSI: 0000000000000020 RDI: 0000000000000013 RBP: 000000000000038a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3590 R13: 00000000ffffffff R14: 00007fda08e4c6d4 R15: 0000000000000002 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@...glegroups.com. Please credit me with: Reported-by: syzbot <syzkaller@...glegroups.com> syzbot will keep track of this bug report. Once a fix for this bug is merged into any tree, reply to this email with: #syz fix: exact-commit-title To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body. View attachment "config.txt" of type "text/plain" (126475 bytes) Download attachment "raw.log" of type "application/octet-stream" (1048576 bytes)
Powered by blists - more mailing lists