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Message-ID: <20081230153012.GA18636@linux.vnet.ibm.com> Date: Tue, 30 Dec 2008 21:00:12 +0530 From: Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> To: kgdb-bugreport@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org, mel@....ul.ie, jason.wessel@...driver.com Subject: [BUG] 2.6.28-git2 - powerpc - kernel expection with KGDB - "kgdbts:RUN sw breakpoint test" Hi, 2.6.28-git2 kernel panic's with "Recursive entry to debugger", while running "kgdbts:RUN sw breakpoint test" on bootup on a powerpc box. The kernel was compiled with following KGDB options CONFIG_HAVE_ARCH_KGDB=y CONFIG_KGDB=y CONFIG_KGDB_SERIAL_CONSOLE=y CONFIG_KGDB_TESTS=y CONFIG_KGDB_TESTS_ON_BOOT=y CONFIG_KGDB_TESTS_BOOT_STRING="V1F100" [ 2.610592] kgdb: Registered I/O driver kgdbts. [ 2.610602] kgdbts:RUN plant and detach test [ 2.610675] kgdbts:RUN sw breakpoint test [ 2.610889] KGDB: re-enter exception: ALL breakpoints killed [ 2.610898] Call Trace: [ 2.610907] [c0000004fe05a840] [c0000000000185b0] .show_stack+0x190/0x2c0 (unreliable) [ 2.610924] [c0000004fe05a910] [c000000000018708] .dump_stack+0x28/0x40 [ 2.610938] [c0000004fe05a990] [c00000000012e2a0] .kgdb_handle_exception+0x860/0x8b0 [ 2.610953] [c0000004fe05aaa0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.610968] [c0000004fe05ab30] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.610982] [c0000004fe05abf0] [c000000000004b04] program_check_common+0x104/0x180 [ 2.610998] --- Exception: 700 at .gdb_regs_to_pt_regs+0xf0/0x120 [ 2.611001] LR = .gdb_regs_to_pt_regs+0x30/0x120 [ 2.611015] [c0000004fe05af70] [c00000000055f9d0] .check_and_rewind_pc+0x70/0x170 [ 2.611029] [c0000004fe05b010] [c00000000055d168] .validate_simple_test+0x88/0x220 [ 2.611044] [c0000004fe05b0a0] [c00000000055e080] .run_simple_test+0x3c0/0x490 [ 2.611058] [c0000004fe05b140] [c00000000055d0b8] .kgdbts_put_char+0x88/0xb0 [ 2.611071] [c0000004fe05b1d0] [c00000000012a314] .put_packet+0x164/0x340 [ 2.611085] [c0000004fe05b2b0] [c00000000012cb6c] .gdb_serial_stub+0x6ec/0x1380 [ 2.611100] [c0000004fe05b3e0] [c00000000012e0a4] .kgdb_handle_exception+0x664/0x8b0 [ 2.611114] [c0000004fe05b4f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.611129] [c0000004fe05b580] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.611143] [c0000004fe05b640] [c000000000004b04] program_check_common+0x104/0x180 [ 2.611159] --- Exception: 700 at .kgdb_breakpoint+0x34/0x60 [ 2.611162] LR = .kgdb_breakpoint+0x20/0x60 [ 2.611174] [c0000004fe05b9b0] [c00000000055e9d8] .run_breakpoint_test+0xe8/0x190 [ 2.611189] [c0000004fe05ba50] [c00000000055eeec] .configure_kgdbts+0x2bc/0xb40 [ 2.611204] [c0000004fe05bb40] [c000000000c35544] .init_kgdbts+0x64/0x80 [ 2.611217] [c0000004fe05bbc0] [c0000000000090d0] .do_one_initcall+0xd0/0x320 [ 2.611231] [c0000004fe05bec0] [c000000000bed32c] .kernel_init+0x2cc/0x480 [ 2.611245] [c0000004fe05bf90] [c00000000003fd60] .kernel_thread+0x54/0x70 [ 2.611257] Kernel panic - not syncing: Recursive entry to debugger [ 2.611282] Call Trace: [ 2.611290] [c0000004fe059f90] [c0000000000185b0] .show_stack+0x190/0x2c0 (unreliable) [ 2.611307] [c0000004fe05a060] [c000000000018708] .dump_stack+0x28/0x40 [ 2.611320] [c0000004fe05a0e0] [c00000000012df14] .kgdb_handle_exception+0x4d4/0x8b0 [ 2.611335] [c0000004fe05a1f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.611350] [c0000004fe05a280] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.611364] [c0000004fe05a340] [c000000000004b04] program_check_common+0x104/0x180 [ 2.611380] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.611383] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.611397] [c0000004fe05a7c0] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.611411] [c0000004fe05a860] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.611425] [c0000004fe05a8e0] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.611438] [c0000004fe05a990] [c00000000012e2ac] .kgdb_handle_exception+0x86c/0x8b0 [ 2.611453] [c0000004fe05aaa0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.611467] [c0000004fe05ab30] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.611482] [c0000004fe05abf0] [c000000000004b04] program_check_common+0x104/0x180 [ 2.611497] --- Exception: 700 at .gdb_regs_to_pt_regs+0xf0/0x120 [ 2.611500] LR = .gdb_regs_to_pt_regs+0x30/0x120 [ 2.611513] [c0000004fe05af70] [c00000000055f9d0] .check_and_rewind_pc+0x70/0x170 [ 2.611528] [c0000004fe05b010] [c00000000055d168] .validate_simple_test+0x88/0x220 [ 2.611542] [c0000004fe05b0a0] [c00000000055e080] .run_simple_test+0x3c0/0x490 [ 2.611556] [c0000004fe05b140] [c00000000055d0b8] .kgdbts_put_char+0x88/0xb0 [ 2.611570] [c0000004fe05b1d0] [c00000000012a314] .put_packet+0x164/0x340 [ 2.611583] [c0000004fe05b2b0] [c00000000012cb6c] .gdb_serial_stub+0x6ec/0x1380 [ 2.611598] [c0000004fe05b3e0] [c00000000012e0a4] .kgdb_handle_exception+0x664/0x8b0 [ 2.611612] [c0000004fe05b4f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.611627] [c0000004fe05b580] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.611641] [c0000004fe05b640] [c000000000004b04] program_check_common+0x104/0x180 [ 2.611657] --- Exception: 700 at .kgdb_breakpoint+0x34/0x60 [ 2.611660] LR = .kgdb_breakpoint+0x20/0x60 [ 2.611672] [c0000004fe05b9b0] [c00000000055e9d8] .run_breakpoint_test+0xe8/0x190 [ 2.611687] [c0000004fe05ba50] [c00000000055eeec] .configure_kgdbts+0x2bc/0xb40 [ 2.611701] [c0000004fe05bb40] [c000000000c35544] .init_kgdbts+0x64/0x80 [ 2.611714] [c0000004fe05bbc0] [c0000000000090d0] .do_one_initcall+0xd0/0x320 [ 2.611728] [c0000004fe05bec0] [c000000000bed32c] .kernel_init+0x2cc/0x480 [ 2.611742] [c0000004fe05bf90] [c00000000003fd60] .kernel_thread+0x54/0x70 [ 2.611754] Kernel panic - not syncing: Recursive entry to debugger [ 2.611777] Call Trace: [ 2.611785] [c0000004fe0596e0] [c0000000000185b0] .show_stack+0x190/0x2c0 (unreliable) [ 2.611802] [c0000004fe0597b0] [c000000000018708] .dump_stack+0x28/0x40 [ 2.611816] [c0000004fe059830] [c00000000012df14] .kgdb_handle_exception+0x4d4/0x8b0 [ 2.611830] [c0000004fe059940] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.611845] [c0000004fe0599d0] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.611859] [c0000004fe059a90] [c000000000004b04] program_check_common+0x104/0x180 [ 2.611875] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.611879] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.611892] [c0000004fe059f10] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.611906] [c0000004fe059fb0] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.611919] [c0000004fe05a030] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.611933] [c0000004fe05a0e0] [c00000000012df20] .kgdb_handle_exception+0x4e0/0x8b0 [ 2.611947] [c0000004fe05a1f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.611962] [c0000004fe05a280] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.611976] [c0000004fe05a340] [c000000000004b04] program_check_common+0x104/0x180 [ 2.611992] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.611995] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.612009] [c0000004fe05a7c0] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.612022] [c0000004fe05a860] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.612036] [c0000004fe05a8e0] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.612050] [c0000004fe05a990] [c00000000012e2ac] .kgdb_handle_exception+0x86c/0x8b0 [ 2.612064] [c0000004fe05aaa0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612079] [c0000004fe05ab30] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612093] [c0000004fe05abf0] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612108] --- Exception: 700 at .gdb_regs_to_pt_regs+0xf0/0x120 [ 2.612112] LR = .gdb_regs_to_pt_regs+0x30/0x120 [ 2.612125] [c0000004fe05af70] [c00000000055f9d0] .check_and_rewind_pc+0x70/0x170 [ 2.612139] [c0000004fe05b010] [c00000000055d168] .validate_simple_test+0x88/0x220 [ 2.612153] [c0000004fe05b0a0] [c00000000055e080] .run_simple_test+0x3c0/0x490 [ 2.612168] [c0000004fe05b140] [c00000000055d0b8] .kgdbts_put_char+0x88/0xb0 [ 2.612181] [c0000004fe05b1d0] [c00000000012a314] .put_packet+0x164/0x340 [ 2.612195] [c0000004fe05b2b0] [c00000000012cb6c] .gdb_serial_stub+0x6ec/0x1380 [ 2.612209] [c0000004fe05b3e0] [c00000000012e0a4] .kgdb_handle_exception+0x664/0x8b0 [ 2.612224] [c0000004fe05b4f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612238] [c0000004fe05b580] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612253] [c0000004fe05b640] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612268] --- Exception: 700 at .kgdb_breakpoint+0x34/0x60 [ 2.612272] LR = .kgdb_breakpoint+0x20/0x60 [ 2.612284] [c0000004fe05b9b0] [c00000000055e9d8] .run_breakpoint_test+0xe8/0x190 [ 2.612299] [c0000004fe05ba50] [c00000000055eeec] .configure_kgdbts+0x2bc/0xb40 [ 2.612313] [c0000004fe05bb40] [c000000000c35544] .init_kgdbts+0x64/0x80 [ 2.612326] [c0000004fe05bbc0] [c0000000000090d0] .do_one_initcall+0xd0/0x320 [ 2.612340] [c0000004fe05bec0] [c000000000bed32c] .kernel_init+0x2cc/0x480 [ 2.612353] [c0000004fe05bf90] [c00000000003fd60] .kernel_thread+0x54/0x70 [ 2.612366] Kernel panic - not syncing: Recursive entry to debugger [ 2.612389] Call Trace: [ 2.612397] [c0000004fe058e30] [c0000000000185b0] .show_stack+0x190/0x2c0 (unreliable) [ 2.612414] [c0000004fe058f00] [c000000000018708] .dump_stack+0x28/0x40 [ 2.612427] [c0000004fe058f80] [c00000000012df14] .kgdb_handle_exception+0x4d4/0x8b0 [ 2.612442] [c0000004fe059090] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612456] [c0000004fe059120] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612471] [c0000004fe0591e0] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612486] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.612490] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.612503] [c0000004fe059660] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.612516] [c0000004fe059700] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.612530] [c0000004fe059780] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.612543] [c0000004fe059830] [c00000000012df20] .kgdb_handle_exception+0x4e0/0x8b0 [ 2.612558] [c0000004fe059940] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612572] [c0000004fe0599d0] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612587] [c0000004fe059a90] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612602] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.612606] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.612619] [c0000004fe059f10] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.612633] [c0000004fe059fb0] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.612646] [c0000004fe05a030] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.612659] [c0000004fe05a0e0] [c00000000012df20] .kgdb_handle_exception+0x4e0/0x8b0 [ 2.612674] [c0000004fe05a1f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612688] [c0000004fe05a280] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612703] [c0000004fe05a340] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612718] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.612722] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.612735] [c0000004fe05a7c0] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.612749] [c0000004fe05a860] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.612762] [c0000004fe05a8e0] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.612775] [c0000004fe05a990] [c00000000012e2ac] .kgdb_handle_exception+0x86c/0x8b0 [ 2.612790] [c0000004fe05aaa0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612804] [c0000004fe05ab30] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612819] [c0000004fe05abf0] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612834] --- Exception: 700 at .gdb_regs_to_pt_regs+0xf0/0x120 [ 2.612837] LR = .gdb_regs_to_pt_regs+0x30/0x120 [ 2.612850] [c0000004fe05af70] [c00000000055f9d0] .check_and_rewind_pc+0x70/0x170 [ 2.612864] [c0000004fe05b010] [c00000000055d168] .validate_simple_test+0x88/0x220 [ 2.612879] [c0000004fe05b0a0] [c00000000055e080] .run_simple_test+0x3c0/0x490 [ 2.612893] [c0000004fe05b140] [c00000000055d0b8] .kgdbts_put_char+0x88/0xb0 [ 2.612906] [c0000004fe05b1d0] [c00000000012a314] .put_packet+0x164/0x340 [ 2.612920] [c0000004fe05b2b0] [c00000000012cb6c] .gdb_serial_stub+0x6ec/0x1380 [ 2.612934] [c0000004fe05b3e0] [c00000000012e0a4] .kgdb_handle_exception+0x664/0x8b0 [ 2.612948] [c0000004fe05b4f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.612963] [c0000004fe05b580] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.612977] [c0000004fe05b640] [c000000000004b04] program_check_common+0x104/0x180 [ 2.612993] --- Exception: 700 at .kgdb_breakpoint+0x34/0x60 [ 2.612996] LR = .kgdb_breakpoint+0x20/0x60 [ 2.613008] [c0000004fe05b9b0] [c00000000055e9d8] .run_breakpoint_test+0xe8/0x190 [ 2.613023] [c0000004fe05ba50] [c00000000055eeec] .configure_kgdbts+0x2bc/0xb40 [ 2.613037] [c0000004fe05bb40] [c000000000c35544] .init_kgdbts+0x64/0x80 [ 2.613050] [c0000004fe05bbc0] [c0000000000090d0] .do_one_initcall+0xd0/0x320 [ 2.613064] [c0000004fe05bec0] [c000000000bed32c] .kernel_init+0x2cc/0x480 [ 2.613077] [c0000004fe05bf90] [c00000000003fd60] .kernel_thread+0x54/0x70 [ 2.613089] Kernel panic - not syncing: Recursive entry to debugger [ 2.613113] Call Trace: [ 2.613121] [c0000004fe058580] [c0000000000185b0] .show_stack+0x190/0x2c0 (unreliable) [ 2.613137] [c0000004fe058650] [c000000000018708] .dump_stack+0x28/0x40 [ 2.613151] [c0000004fe0586d0] [c00000000012df14] .kgdb_handle_exception+0x4d4/0x8b0 [ 2.613165] [c0000004fe0587e0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.613180] [c0000004fe058870] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.613194] [c0000004fe058930] [c000000000004b04] program_check_common+0x104/0x180 [ 2.613210] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.613213] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.613226] [c0000004fe058db0] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.613240] [c0000004fe058e50] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.613254] [c0000004fe058ed0] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.613267] [c0000004fe058f80] [c00000000012df20] .kgdb_handle_exception+0x4e0/0x8b0 [ 2.613281] [c0000004fe059090] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.613296] [c0000004fe059120] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.613311] [c0000004fe0591e0] [c000000000004b04] program_check_common+0x104/0x180 [ 2.613326] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.613330] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.613342] [c0000004fe059660] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.613356] [c0000004fe059700] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.613370] [c0000004fe059780] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.613383] [c0000004fe059830] [c00000000012df20] .kgdb_handle_exception+0x4e0/0x8b0 [ 2.613398] [c0000004fe059940] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.613412] [c0000004fe0599d0] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.613427] [c0000004fe059a90] [c000000000004b04] program_check_common+0x104/0x180 [ 2.613442] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.613446] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.613458] [c0000004fe059f10] [c000000000102f18] .smp_call_function+0x58/0x80 [ 2.613472] [c0000004fe059fb0] [c000000000044bf4] .smp_send_stop+0x34/0x50 [ 2.613486] [c0000004fe05a030] [c0000000000a0b44] .panic+0xa4/0x210 [ 2.613499] [c0000004fe05a0e0] [c00000000012df20] .kgdb_handle_exception+0x4e0/0x8b0 [ 2.613514] [c0000004fe05a1f0] [c0000000000429e4] .kgdb_handle_breakpoint+0x74/0x120 [ 2.613528] [c0000004fe05a280] [c00000000003c3d0] .program_check_exception+0x370/0xb00 [ 2.613543] [c0000004fe05a340] [c000000000004b04] program_check_common+0x104/0x180 [ 2.613558] --- Exception: 700 at .smp_call_function_mask+0x78/0x3f0 [ 2.613562] LR = .smp_call_function_mask+0x58/0x3f0 [ 2.613575] [c0000004fe05a7c0] [c0000000001020 [ 2.628594] Call Trace: [ 2.628600] Kernel panic - not syncing: Recursive entry to debugger [ 2.628623] Call Trace: [ 2.628629] Kernel panic - not syncing: Recursive entry to debugger [ 2.628652] Call Trace: (10000's of above 2 lines) -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL. -- 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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