Messages in this thread | | | Date | Sun, 25 Jan 2009 15:48:33 +0530 | Subject | NULL ptr dereference in __remove_hrtimer() | From | Mandar Thite <> |
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Hello everyone,
I am trying to boot Linux kernel on OMAP5912 CPU(arch/arm/mach-omap1) containing ARM926 core. I have configured my Linux kernel to run in tickless mode. In the final steps of booting, kernel is encountering " NULL pointer dereference " in the function " rb_erase() " called from " __remove_hrtimer() ". Following is the backtrace log emitted by the kernel.
Backtrace: [<c012ed1c>] (rb_erase+0x0/0x358) from [<c0053f48>] (__remove_hrtimer+0x88/0x94) r9:00000080 r8:c0285530 r7:00000000 r6:00000001 r5:c0285530 r4:c02a6298 [<c0053ec0>] (__remove_hrtimer+0x0/0x94) from [<c00548a8>] (hrtimer_start+0x74/0x108) r7:00000006 r6:02625a00 r5:00000000 r4:2d4cae00 [<c0054834>] (hrtimer_start+0x0/0x108) from [<c005af18>] (tick_nohz_stop_sched_tick+0x2bc/0x3a4) [<c005ac5c>] (tick_nohz_stop_sched_tick+0x0/0x3a4) from [<c0023318>] (cpu_idle+0x38/0x60) [<c00232e0>] (cpu_idle+0x0/0x60) from [<c01f7d58>] (rest_init+0x58/0x6c) r5:c001cdc4 r4:c02bc754 [<c01f7d00>] (rest_init+0x0/0x6c) from [<c0008ad0>] (start_kernel+0x244/0x290) [<c000888c>] (start_kernel+0x0/0x290) from [<10008034>] (0x10008034) r6:c001cdc0 r5:c029af88 r4:00053175 Code: e3580001 01a04005 189dabf0 ea000082 (e5941008) ---[ end trace b0a66fe3e48abdda ]--- Kernel panic - not syncing: Attempted to kill the idle task!
What I understand is, address of nonexistent node is passed to rb_erase()? Can anybody please direct me, how to investigate further into this problem?
I kindly request you to personally CC me your responses. Thanks a lot. --Mandar
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