bisecting cause commit starting from 47ee6e86e0a3e3a15fbdd6d94aab39e46013c961 building syzkaller on fd37b39ea8db38458059092f5f94b582392e8922 testing commit 47ee6e86e0a3e3a15fbdd6d94aab39e46013c961 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in __mark_chain_precision testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 all runs: OK # git bisect start 47ee6e86e0a3e3a15fbdd6d94aab39e46013c961 v5.2 Bisecting: 7553 revisions left to test after this (roughly 13 steps) [5f26f1143678d0fed8115afdcc0de99ee7cc9675] Merge tag 'asm-generic-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic testing commit 5f26f1143678d0fed8115afdcc0de99ee7cc9675 with gcc (GCC) 8.1.0 run #0: OK run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: crashed: general protection fault in send_hsr_supervision_frame # git bisect bad 5f26f1143678d0fed8115afdcc0de99ee7cc9675 Bisecting: 4239 revisions left to test after this (roughly 12 steps) [8f6ccf6159aed1f04c6d179f61f6fb2691261e84] Merge tag 'clone3-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux testing commit 8f6ccf6159aed1f04c6d179f61f6fb2691261e84 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 8f6ccf6159aed1f04c6d179f61f6fb2691261e84 Bisecting: 2150 revisions left to test after this (roughly 11 steps) [6413139dfc641aaaa30580b59696a5f7ea274194] skbuff: increase verbosity when dumping skb data testing commit 6413139dfc641aaaa30580b59696a5f7ea274194 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 6413139dfc641aaaa30580b59696a5f7ea274194 Bisecting: 842 revisions left to test after this (roughly 10 steps) [e786741ff1b52769b044b7f4407f39cd13ee5d2d] Merge tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging testing commit e786741ff1b52769b044b7f4407f39cd13ee5d2d with gcc (GCC) 8.1.0 run #0: OK run #1: OK run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: crashed: general protection fault in send_hsr_supervision_frame run #9: crashed: general protection fault in send_hsr_supervision_frame # git bisect bad e786741ff1b52769b044b7f4407f39cd13ee5d2d Bisecting: 613 revisions left to test after this (roughly 9 steps) [97ff4ca46d3279134cec49752de8c5a62dc68460] Merge tag 'char-misc-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc testing commit 97ff4ca46d3279134cec49752de8c5a62dc68460 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 97ff4ca46d3279134cec49752de8c5a62dc68460 Bisecting: 306 revisions left to test after this (roughly 8 steps) [bd462d407bbb498b48f21f2c88a392fb52823700] staging/rtl8723bs/core: Remove redundant call to memset testing commit bd462d407bbb498b48f21f2c88a392fb52823700 with gcc (GCC) 8.1.0 all runs: OK # git bisect good bd462d407bbb498b48f21f2c88a392fb52823700 Bisecting: 153 revisions left to test after this (roughly 7 steps) [eb3539767a358129c20e536774eb1fa67b46ac27] staging: bcm2835-camera: Fix stride on RGB3/BGR3 formats testing commit eb3539767a358129c20e536774eb1fa67b46ac27 with gcc (GCC) 8.1.0 all runs: OK # git bisect good eb3539767a358129c20e536774eb1fa67b46ac27 Bisecting: 85 revisions left to test after this (roughly 6 steps) [208a68c8393d6041a90862992222f3d7943d44d6] iio: iio-utils: Fix possible incorrect mask calculation testing commit 208a68c8393d6041a90862992222f3d7943d44d6 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 208a68c8393d6041a90862992222f3d7943d44d6 Bisecting: 42 revisions left to test after this (roughly 6 steps) [800132aa06c28fabb4462bdd4a6811565a101a4b] staging: rtl8723bs: Remove rtw_btcoex_SpecialPacketNotify() testing commit 800132aa06c28fabb4462bdd4a6811565a101a4b with gcc (GCC) 8.1.0 all runs: OK # git bisect good 800132aa06c28fabb4462bdd4a6811565a101a4b Bisecting: 21 revisions left to test after this (roughly 5 steps) [ee8e2ce55df0109af56b0a4278db8ebe52886634] staging: rtl8723bs: Remove rtw_btcoex_LpsVal() testing commit ee8e2ce55df0109af56b0a4278db8ebe52886634 with gcc (GCC) 8.1.0 all runs: OK # git bisect good ee8e2ce55df0109af56b0a4278db8ebe52886634 Bisecting: 10 revisions left to test after this (roughly 4 steps) [a47a70c25777ac06c9d2e09030377cfee851edee] staging: rtl8723bs: Remove rtw_btcoex_ScanNotify() testing commit a47a70c25777ac06c9d2e09030377cfee851edee with gcc (GCC) 8.1.0 all runs: OK # git bisect good a47a70c25777ac06c9d2e09030377cfee851edee Bisecting: 5 revisions left to test after this (roughly 3 steps) [66e8fafb70c206e2c5953ad8df6277fb2b0516da] staging: rtl8723bs: Remove rtw_btcoex_DisplayBtCoexInfo() testing commit 66e8fafb70c206e2c5953ad8df6277fb2b0516da with gcc (GCC) 8.1.0 all runs: OK # git bisect good 66e8fafb70c206e2c5953ad8df6277fb2b0516da Bisecting: 2 revisions left to test after this (roughly 2 steps) [209ff937b0d4d70bb054890a8c1722cec3fc70fe] staging: kpc2000: simplify comparison to NULL in kpc2000_spi.c testing commit 209ff937b0d4d70bb054890a8c1722cec3fc70fe with gcc (GCC) 8.1.0 all runs: OK # git bisect good 209ff937b0d4d70bb054890a8c1722cec3fc70fe Bisecting: 0 revisions left to test after this (roughly 1 step) [5d1532482943403eb11911898565628fa45863d7] staging: kpc2000: simplify comparison to NULL in fileops.c testing commit 5d1532482943403eb11911898565628fa45863d7 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 5d1532482943403eb11911898565628fa45863d7 e786741ff1b52769b044b7f4407f39cd13ee5d2d is the first bad commit revisions tested: 16, total time: 4h14m11.14618826s (build: 1h30m45.570393734s, test: 2h38m6.747470753s) first bad commit: e786741ff1b52769b044b7f4407f39cd13ee5d2d Merge tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging cc: ["allison@lohutok.net" "davem@davemloft.net" "gregkh@linuxfoundation.org" "jic23@kernel.org" "knaack.h@gmx.de" "kstewart@linuxfoundation.org" "lars@metafoo.de" "linus.walleij@linaro.org" "linux-iio@vger.kernel.org" "linux-kernel@vger.kernel.org" "mchehab+samsung@kernel.org" "nicolas.ferre@microchip.com" "paulmck@linux.ibm.com" "pmeerw@pmeerw.net" "rfontana@redhat.com" "tglx@linutronix.de" "torvalds@linux-foundation.org"] crash: general protection fault in send_hsr_supervision_frame kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.2.0+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:send_hsr_supervision_frame+0x30/0xf60 net/hsr/hsr_device.c:255 Code: 89 e5 41 57 41 56 41 55 49 89 fd 41 54 41 89 d4 48 89 c2 53 48 c1 ea 03 48 83 ec 50 48 89 45 d0 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 89 75 c8 0f 85 83 0c 00 00 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffff8880aeb09c68 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: ffff8880907836c0 RCX: 1ffff11015d6137b RDX: 0000000000000002 RSI: 0000000000000017 RDI: 0000000000000000 RBP: ffff8880aeb09ce0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880a98cc340 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880aeb09db8 R15: ffff8880aeb24b80 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a3e5a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hsr_announce+0xd9/0x2b0 net/hsr/hsr_device.c:339 call_timer_fn+0x14d/0x510 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] run_timer_softirq+0xc6f/0x1330 kernel/time/timer.c:1698 __do_softirq+0x262/0x931 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x174/0x590 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828 RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61 Code: 11 ff ff ff 4c 89 e7 e8 5c 51 ec fa eb 97 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 e9 07 00 00 00 0f 00 2d 90 3c 5a 00 fb f4 <5d> c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 e9 07 00 00 RSP: 0018:ffff8880a98dfd70 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880a98cc340 RCX: ffffffff8156bfaf RDX: 1ffffffff1065005 RSI: 0000000000000004 RDI: ffffffff88328028 RBP: ffff8880a98dfd70 R08: ffffed1015d66c84 R09: ffffed1015d66c83 R10: ffffed1015d66c83 R11: ffff8880aeb3641b R12: 0000000000000001 R13: ffffffff88328018 R14: 0000000000000001 R15: ffffffff88f7ddf8 arch_safe_halt arch/x86/include/asm/paravirt.h:156 [inline] default_idle+0x51/0x310 arch/x86/kernel/process.c:580 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571 default_idle_call+0x6d/0x90 kernel/sched/idle.c:94 cpuidle_idle_call kernel/sched/idle.c:154 [inline] do_idle+0x3e4/0x590 kernel/sched/idle.c:263 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:354 start_secondary+0x2fe/0x3f0 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Modules linked in: ---[ end trace 12b62ff4e5c49c89 ]--- RIP: 0010:send_hsr_supervision_frame+0x30/0xf60 net/hsr/hsr_device.c:255 Code: 89 e5 41 57 41 56 41 55 49 89 fd 41 54 41 89 d4 48 89 c2 53 48 c1 ea 03 48 83 ec 50 48 89 45 d0 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 89 75 c8 0f 85 83 0c 00 00 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffff8880aeb09c68 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: ffff8880907836c0 RCX: 1ffff11015d6137b RDX: 0000000000000002 RSI: 0000000000000017 RDI: 0000000000000000 RBP: ffff8880aeb09ce0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880a98cc340 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880aeb09db8 R15: ffff8880aeb24b80 FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a3e5a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400