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Date: Wed, 13 Nov 2013 12:47:06 -0500 From: Dave Jones <davej@...hat.com> To: Al Viro <viro@...iv.linux.org.uk> Cc: Linux Kernel <linux-kernel@...r.kernel.org> Subject: getcwd() rcu locking bug. My fuzzer just hit this on v3.12-7033-g42a2d923cc34 ===================================== [ BUG: bad unlock balance detected! ] 3.12.0+ #2 Not tainted ------------------------------------- trinity-child1/11681 is trying to release lock (rcu_read_lock) at: [<ffffffff811d287c>] SyS_getcwd+0x11c/0x300 but there are no more locks to release! other info that might help us debug this: no locks held by trinity-child1/11681. stack backtrace: CPU: 1 PID: 11681 Comm: trinity-child1 Not tainted 3.12.0+ #2 ffffffff81c480a0 ffff88009a40fea0 ffffffff8171b3dc ffff8802399b1560 ffff88009a40fec8 ffffffff810d370e ffff8802399b1560 ffffffff81c480a0 ffffffff811d287c ffff88009a40ff00 ffffffff810d80fe ffff88023d2d4600 Call Trace: [<ffffffff8171b3dc>] dump_stack+0x4e/0x7a [<ffffffff810d370e>] print_unlock_imbalance_bug+0xee/0x100 [<ffffffff811d287c>] ? SyS_getcwd+0x11c/0x300 [<ffffffff810d80fe>] lock_release+0x25e/0x310 [<ffffffff811d2894>] SyS_getcwd+0x134/0x300 [<ffffffff811d2799>] ? SyS_getcwd+0x39/0x300 [<ffffffff8172e064>] tracesys+0xdd/0xe2 ------------[ cut here ]------------ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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