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Message-ID: <8b67d60901150148k1a7a5f63u2f01d9b0a0650aa1@mail.gmail.com> Date: Thu, 15 Jan 2009 09:48:55 +0000 From: Adrian McMenamin <lkmladrian@...il.com> To: linux-sh <linux-sh@...r.kernel.org> Cc: LKML <linux-kernel@...r.kernel.org> Subject: pipe_read oops Anyone else seen this? I haven't had time to investigate it - from a pre 2.6.29-rc1 kernel (on my topic branch - but can see no signs of my code being involved). Unfortunately I was testing this to see if my code worked with out memory allocation debugging on, so quite a lot of debugging stuff switched off. Will investigate further, later. [ 43.495753] Unable to handle kernel NULL pointer dereference at virtual address 0000000c [ 43.509964] pc = 8c08938a [ 43.512441] *pde = 00000000 [ 43.517075] Oops: 0000 [#1] [ 43.519187] Modules linked in: [ 43.522239] [ 43.523861] Pid : 816, Comm: rc [ 43.527281] CPU : 0 Not tainted (2.6.28-06145-g8874d26 #211) [ 43.527308] [ 43.535560] PC is at pipe_read+0xca/0x3e0 [ 43.539685] PR is at pipe_read+0x54/0x3e0 [ 43.543805] PC : 8c08938a SP : 8c849e60 SR : 40008000 TEA : 004c8028 [ 43.550632] R0 : 55555555 R1 : 00000000 R2 : 00000000 R3 : 8cf3222c [ 43.557460] R4 : 8cf32200 R5 : 8cf3222c R6 : 00000001 R7 : 55555555 [ 43.564287] R8 : 8c5286c0 R9 : 8c849ebc R10 : 8c849efc R11 : fffffdee [ 43.571111] R12 : 8cf3222c R13 : 8c080000 R14 : 8cf32200 [ 43.576503] MACH: 00000000 MACL: fffffff8 GBR : 296e4440 PR : 8c089314 [ 43.583319] [ 43.583332] Call trace: [ 43.587479] [<8c05eb52>] do_wp_page+0x4d2/0x800 [ 43.592155] [<8c08035c>] do_sync_read+0x9c/0x100 [ 43.596823] [<8c080000>] wait_on_retry_sync_kiocb+0x0/0xc0 [ 43.602587] [<8c031800>] autoremove_wake_function+0x0/0x40 [ 43.608141] [<8c2499e8>] preempt_schedule+0x28/0x60 [ 43.613164] [<8c249360>] __sched_text_start+0x0/0x560 [ 43.618380] [<8c080c1e>] vfs_read+0x7e/0x160 [ 43.622862] [<8c08119a>] sys_read+0x3a/0x80 [ 43.627182] [<8c008236>] syscall_call+0xc/0x10 [ 43.631663] [<8c081160>] sys_read+0x0/0x80 [ 43.635965] [ 43.637401] Process: rc (pid: 816, stack limit = 8c848001) [ 43.643148] Stack: (0x8c849e60 to 0x8c84a000) [ 43.647632] 9e60: 8cf3222c 8c52872c 8c849f40 55555555 8c8f0480 00000000 00000000 00000080 [ 43.656075] 9e80: 55555555 00000000 8c05eb52 8c87d0a8 8c08035c 8c849f40 8c080000 8c8f0480 [ 43.664698] 9ea0: fffffdee 8c849efc 8c849ebc 00000000 00000000 00000000 8c849f7c 8c84a004 [ 43.673142] 9ec0: 8c8af3c0 00000000 00000001 ffffffff 8c8f0480 00000000 00000000 00000000 [ 43.681764] 9ee0: 00000000 8cc1a080 00000000 00000000 8c8af380 8cc1a080 8c031800 8c849efc [ 43.690208] 9f00: 8c849efc 00000000 00000000 8cc1a250 8cc1a24c 8cc1a1d4 8cc1a0fc 00000080 [ 43.698830] 9f20: 8c2499e8 8c849f40 00000638 00000000 00000000 00000000 8c249360 10000000 [ 43.707274] 9f40: 7ba70cb4 00000080 8c080c1e 7ba70c84 00000638 fffffff7 8c849f7c 7ba70cb4 [ 43.715897] 9f60: 00000080 8c8f0480 8c08119a 00000080 7ba70cb4 8c8f0480 8c849f48 00000000 [ 43.724340] 9f80: 00000000 00000000 8c008236 00000000 00000000 00000071 0000007f 8c081160 [ 43.732963] 9fa0: 00000000 00000440 7ba70d3c 00000003 00000003 7ba70cb4 00000080 00000118 [ 43.741406] 9fc0: 00000000 00000080 7ba70cb4 00000003 00000000 00000638 7ba70c84 7ba70c84 [ 43.750029] 9fe0: 29675174 00457bf2 00008001 296e4440 00000000 000003c0 0000004c 00000160 [ 43.766583] ---[ end trace 42b96aa1b3d1820b ]--- -- 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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