Messages in this thread | | | From | ZhangXiao <> | Subject | bug report, DEBUG_LOCKS_WARN_ON at kernel/locking/lockdep.c:3646 check_flags | Date | Tue, 24 May 2016 11:22:36 +0800 |
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Hi Experts,
With ARM , versatile-pb When I enable PROVE_LOCKING, DEBUG_LOCKDEP and KPROBES_SANITY_TEST, there will be a call trace like below:
Kprobe smoke test: started ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1 at kernel/locking/lockdep.c:3646 check_flags+0xdc/0x200 DEBUG_LOCKS_WARN_ON(!current->hardirqs_enabled) Modules linked in: CPU: 0 PID: 1 Comm: swapper Not tainted 4.6.0-WR8.0.0.0_standard+ #45 Hardware name: ARM-Versatile (Device Tree Support) [<c0018478>] (unwind_backtrace) from [<c001470c>] (show_stack+0x20/0x24) [<c001470c>] (show_stack) from [<c03dafd8>] (dump_stack+0x20/0x28) [<c03dafd8>] (dump_stack) from [<c0022b9c>] (__warn+0xe0/0x10c) [<c0022b9c>] (__warn) from [<c0022c10>] (warn_slowpath_fmt+0x48/0x50) [<c0022c10>] (warn_slowpath_fmt) from [<c0060a80>] (check_flags+0xdc/0x200) [<c0060a80>] (check_flags) from [<c0061390>] (lock_acquire+0x50/0x258) [<c0061390>] (lock_acquire) from [<c06fa9bc>] (mutex_lock_nested+0x60/0x3a8) [<c06fa9bc>] (mutex_lock_nested) from [<c00adfa8>] (unregister_jprobes.part.5+0x2c/0x94) [<c00adfa8>] (unregister_jprobes.part.5) from [<c00ae060>] (unregister_jprobe+0x2c/0x34) [<c00ae060>] (unregister_jprobe) from [<c00ac894>] (init_test_probes+0x240/0x51c) [<c00ac894>] (init_test_probes) from [<c098eb6c>] (init_kprobes+0x15c/0x19c) [<c098eb6c>] (init_kprobes) from [<c0009d54>] (do_one_initcall+0x114/0x1d8) [<c0009d54>] (do_one_initcall) from [<c0981f20>] (kernel_init_freeable+0x1fc/0x2cc) [<c0981f20>] (kernel_init_freeable) from [<c06f823c>] (kernel_init+0x18/0x104) [<c06f823c>] (kernel_init) from [<c000fc8c>] (ret_from_fork+0x14/0x28) ---[ end trace e251ef8fa7e2aa1e ]--- possible reason: unannotated irqs-on. irq event stamp: 274608 hardirqs last enabled at (274607): [<c06fc940>] __mutex_unlock_slowpath+0x158/0x1b0 hardirqs last disabled at (274608): [<c06ff2c4>] __und_svc+0x44/0x58 softirqs last enabled at (274584): [<c0009968>] __do_softirq+0x3e0/0x550 softirqs last disabled at (274551): [<c0027508>] irq_exit+0x94/0xd8 Kprobe smoke test: passed successfully
Thanks Xiao
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