bisecting cause commit starting from 125b7e0949d4e72b15c2b1a1590f8cece985a918 building syzkaller on acb51638141ff960f547431757130749bc176bc0 testing commit 125b7e0949d4e72b15c2b1a1590f8cece985a918 with gcc (GCC) 8.1.0 all runs: crashed: BUG: corrupted list in rxrpc_local_processor testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.1.0 run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor072618950" "root@10.128.15.201:./syz-executor072618950"]: exit status 1 ssh: connect to host 10.128.15.201 port 22: Connection timed out lost connection 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: OK # git bisect start 125b7e0949d4e72b15c2b1a1590f8cece985a918 v5.2 Bisecting: 7200 revisions left to test after this (roughly 13 steps) [ef8f3d48afd6a17a0dae8c277c2f539c2f19fd16] Merge branch 'akpm' (patches from Andrew) testing commit ef8f3d48afd6a17a0dae8c277c2f539c2f19fd16 with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in send_hsr_supervision_frame run #1: crashed: general protection fault in send_hsr_supervision_frame run #2: crashed: general protection fault in send_hsr_supervision_frame run #3: crashed: general protection fault in send_hsr_supervision_frame run #4: crashed: general protection fault in send_hsr_supervision_frame run #5: crashed: general protection fault in send_hsr_supervision_frame run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad ef8f3d48afd6a17a0dae8c277c2f539c2f19fd16 Bisecting: 3941 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: 1954 revisions left to test after this (roughly 11 steps) [f7623d340794620ac8d933477cc265be77c78fe5] Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next testing commit f7623d340794620ac8d933477cc265be77c78fe5 with gcc (GCC) 8.1.0 all runs: OK # git bisect good f7623d340794620ac8d933477cc265be77c78fe5 Bisecting: 1158 revisions left to test after this (roughly 10 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 run #0: crashed: general protection fault in send_hsr_supervision_frame run #1: crashed: general protection fault in send_hsr_supervision_frame run #2: crashed: general protection fault in send_hsr_supervision_frame run #3: crashed: general protection fault in send_hsr_supervision_frame run #4: crashed: general protection fault in send_hsr_supervision_frame run #5: crashed: general protection fault in send_hsr_supervision_frame run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad 97ff4ca46d3279134cec49752de8c5a62dc68460 Bisecting: 429 revisions left to test after this (roughly 9 steps) [64b08df460cfdfc2b010263043a057cdd33500ed] Merge tag 'hwmon-for-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging testing commit 64b08df460cfdfc2b010263043a057cdd33500ed with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in send_hsr_supervision_frame run #1: crashed: general protection fault in send_hsr_supervision_frame run #2: crashed: general protection fault in send_hsr_supervision_frame run #3: crashed: general protection fault in send_hsr_supervision_frame run #4: crashed: general protection fault in send_hsr_supervision_frame run #5: crashed: general protection fault in send_hsr_supervision_frame run #6: crashed: general protection fault in send_hsr_supervision_frame run #7: OK run #8: crashed: general protection fault in send_hsr_supervision_frame run #9: OK # git bisect bad 64b08df460cfdfc2b010263043a057cdd33500ed Bisecting: 142 revisions left to test after this (roughly 8 steps) [af144a983402f7fd324ce556d9f9011a8b3e01fe] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net testing commit af144a983402f7fd324ce556d9f9011a8b3e01fe with gcc (GCC) 8.1.0 run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor303644712" "root@10.128.15.206:./syz-executor303644712"]: exit status 1 ssh: connect to host 10.128.15.206 port 22: Connection timed out lost connection run #1: crashed: general protection fault in send_hsr_supervision_frame run #2: crashed: general protection fault in send_hsr_supervision_frame run #3: crashed: general protection fault in send_hsr_supervision_frame run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad af144a983402f7fd324ce556d9f9011a8b3e01fe Bisecting: 111 revisions left to test after this (roughly 7 steps) [a2bed90704c68d3763bf24decb1b781a45395de8] gtp: fix use-after-free in gtp_newlink() testing commit a2bed90704c68d3763bf24decb1b781a45395de8 with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in send_hsr_supervision_frame run #1: crashed: general protection fault in send_hsr_supervision_frame run #2: OK run #3: OK run #4: OK run #5: OK run #6: OK run #7: OK run #8: OK run #9: OK # git bisect bad a2bed90704c68d3763bf24decb1b781a45395de8 Bisecting: 55 revisions left to test after this (roughly 6 steps) [618bac45937a3dc6126ac0652747481e97000f99] net/tls: reject offload of TLS 1.3 testing commit 618bac45937a3dc6126ac0652747481e97000f99 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 618bac45937a3dc6126ac0652747481e97000f99 Bisecting: 22 revisions left to test after this (roughly 5 steps) [c3ead2df9776ab22490d78a7f68a8ec58700e07f] Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf testing commit c3ead2df9776ab22490d78a7f68a8ec58700e07f with gcc (GCC) 8.1.0 all runs: OK # git bisect good c3ead2df9776ab22490d78a7f68a8ec58700e07f Bisecting: 11 revisions left to test after this (roughly 4 steps) [b9a1e627405d68d475a3c1f35e685ccfb5bbe668] hsr: implement dellink to clean up resources testing commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668 with gcc (GCC) 8.1.0 run #0: crashed: general protection fault in send_hsr_supervision_frame run #1: crashed: general protection fault in send_hsr_supervision_frame 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 b9a1e627405d68d475a3c1f35e685ccfb5bbe668 Bisecting: 5 revisions left to test after this (roughly 3 steps) [52e63a4eabcf6ed9add47aefe86ada31e12e6d39] xfrm: remove a duplicated assignment testing commit 52e63a4eabcf6ed9add47aefe86ada31e12e6d39 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 52e63a4eabcf6ed9add47aefe86ada31e12e6d39 Bisecting: 3 revisions left to test after this (roughly 2 steps) [56c5ee1a5823e9cf5288b84ae6364cb4112f8225] xfrm interface: fix memory leak on creation testing commit 56c5ee1a5823e9cf5288b84ae6364cb4112f8225 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 56c5ee1a5823e9cf5288b84ae6364cb4112f8225 Bisecting: 1 revision left to test after this (roughly 1 step) [114b5b355ec0b6e83a6628a5ab5d03e50fd40a31] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec testing commit 114b5b355ec0b6e83a6628a5ab5d03e50fd40a31 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 114b5b355ec0b6e83a6628a5ab5d03e50fd40a31 Bisecting: 0 revisions left to test after this (roughly 0 steps) [619afef01f74f3572b5e9a266c1230dc83761eec] hsr: fix a memory leak in hsr_del_port() testing commit 619afef01f74f3572b5e9a266c1230dc83761eec with gcc (GCC) 8.1.0 all runs: OK # git bisect good 619afef01f74f3572b5e9a266c1230dc83761eec b9a1e627405d68d475a3c1f35e685ccfb5bbe668 is the first bad commit commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668 Author: Cong Wang Date: Wed Jul 3 17:21:13 2019 -0700 hsr: implement dellink to clean up resources hsr_link_ops implements ->newlink() but not ->dellink(), which leads that resources not released after removing the device, particularly the entries in self_node_db and node_db. So add ->dellink() implementation to replace the priv_destructor. This also makes the code slightly easier to understand. Reported-by: syzbot+c6167ec3de7def23d1e8@syzkaller.appspotmail.com Cc: Arvid Brodin Signed-off-by: Cong Wang Signed-off-by: David S. Miller :040000 040000 65599c9790197ff086c1843ca65b40688d162283 07d35e0ebb6f5a6fa2ee09ede31e24b8def82990 M net revisions tested: 16, total time: 4h37m35.650968672s (build: 1h34m4.764430909s, test: 2h57m44.914675502s) first bad commit: b9a1e627405d68d475a3c1f35e685ccfb5bbe668 hsr: implement dellink to clean up resources cc: ["arvid.brodin@alten.se" "davem@davemloft.net" "linux-kernel@vger.kernel.org" "netdev@vger.kernel.org" "xiyou.wangcong@gmail.com"] 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: 0 PID: 0 Comm: swapper/0 Not tainted 5.2.0-rc6+ #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:251 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:ffff8880aea09c68 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: ffff888079c43640 RCX: 1ffff110127108f4 RDX: 0000000000000002 RSI: 0000000000000017 RDI: 0000000000000000 RBP: ffff8880aea09ce0 R08: ffffed1015d46c70 R09: ffffed1015d46c6f R10: ffffed1015d46c6f R11: ffff8880aea3637b R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880aea09db8 R15: ffff8880aea24b80 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d0230 CR3: 000000008d867000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hsr_announce+0xd9/0x2b0 net/hsr/hsr_device.c:335 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+0x260/0x958 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:536 [inline] smp_apic_timer_interrupt+0x13e/0x540 arch/x86/kernel/apic/apic.c:1068 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:61 Code: 11 ff ff ff 4c 89 e7 e8 fc 20 f4 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 e0 6f 63 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:ffffffff88207ce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffffffff8827a040 RCX: 0000000000000000 RDX: 1ffffffff10643e1 RSI: 0000000000000006 RDI: ffffffff88321f08 RBP: ffffffff88207ce0 R08: 0000000000000006 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff88321ef8 R14: 0000000000000000 R15: ffffffff88f69ef8 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 rest_init+0x1a4/0x279 init/main.c:451 arch_call_rest_init+0x9/0xc start_kernel+0x6bd/0x6f8 init/main.c:761 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Modules linked in: ---[ end trace 1a6fbcf27e2607ec ]--- RIP: 0010:send_hsr_supervision_frame+0x30/0xf60 net/hsr/hsr_device.c:251 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:ffff8880aea09c68 EFLAGS: 00010282 RAX: dffffc0000000000 RBX: ffff888079c43640 RCX: 1ffff110127108f4 RDX: 0000000000000002 RSI: 0000000000000017 RDI: 0000000000000000 RBP: ffff8880aea09ce0 R08: ffffed1015d46c70 R09: ffffed1015d46c6f R10: ffffed1015d46c6f R11: ffff8880aea3637b R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880aea09db8 R15: ffff8880aea24b80 FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d0230 CR3: 000000008d867000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400