bisecting fixing commit since 70b971118e074d5042715587953f27929e99117a building syzkaller on 53ce8104a7b0e1c4c79ab17d5faddce6ad16a1f1 testing commit 70b971118e074d5042715587953f27929e99117a with gcc (GCC) 8.1.0 kernel signature: 6608c1df75782ec8b8eabc346b4240f2ca0fd7afa302940128100d8b467056ae run #0: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #1: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #2: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #3: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #4: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #5: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #6: crashed: BUG: unable to handle kernel paging request in bpf_trace_run2 run #7: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #8: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode run #9: crashed: BUG: unable to handle kernel paging request in syscall_enter_from_user_mode testing current HEAD 3db1a3fa98808aa90f95ec3e0fa2fc7abf28f5c9 testing commit 3db1a3fa98808aa90f95ec3e0fa2fc7abf28f5c9 with gcc (GCC) 8.1.0 kernel signature: 2c71ed53f7608a5a11620b5e255ed9d1730a01533c172819214bdd63c1d98e8f run #0: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #1: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #2: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #3: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #4: crashed: BUG: unable to handle kernel paging request in bpf_trace_run2 run #5: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #6: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #7: crashed: BUG: unable to handle kernel paging request in bpf_trace_run2 run #8: crashed: BUG: unable to handle kernel paging request in __traceiter_sys_enter run #9: crashed: BUG: unable to handle kernel paging request in bpf_trace_run2 revisions tested: 2, total time: 16m33.20393276s (build: 10m10.865609688s, test: 5m44.543279442s) the crash still happens on HEAD commit msg: Merge tag 'staging-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging crash: BUG: unable to handle kernel paging request in bpf_trace_run2 BUG: unable to handle page fault for address: ffffc90000207030 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 100000067 P4D 100000067 PUD 100157067 PMD 100834067 PTE 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 6144 Comm: syz-executor.0 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:bpf_dispatcher_nop_func include/linux/bpf.h:651 [inline] RIP: 0010:__bpf_trace_run kernel/trace/bpf_trace.c:2088 [inline] RIP: 0010:bpf_trace_run2+0x92/0x1b0 kernel/trace/bpf_trace.c:2125 Code: 3d 34 d9 93 03 00 0f 84 e8 00 00 00 be 28 08 00 00 48 c7 c7 7a 62 0c 84 e8 0b 96 f0 ff 0f 1f 44 00 00 48 8d 73 38 48 8d 7d d8 53 30 e8 36 28 f3 01 85 c0 74 0d 80 3d fc d8 93 03 00 0f 84 80 RSP: 0018:ffffc90000463eb8 EFLAGS: 00010202 RAX: 0000000080000001 RBX: ffffc90000207000 RCX: 00000000b2001e43 RDX: ffffffff81311be0 RSI: ffffc90000207038 RDI: ffffc90000463ec0 RBP: ffffc90000463ee8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000463f58 R13: 0000000000000037 R14: 0000000000000037 R15: 0000000000000000 FS: 0000000001a4b940(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000207030 CR3: 000000010c824004 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __traceiter_sys_enter+0x24/0x40 include/trace/events/syscalls.h:18 trace_sys_enter include/trace/events/syscalls.h:18 [inline] syscall_trace_enter.isra.18+0x205/0x260 kernel/entry/common.c:76 do_syscall_64+0xf/0x70 arch/x86/entry/common.c:41 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x46010a Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 3d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 1a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fff891afe98 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fff891afec0 RCX: 000000000046010a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 0000000000747ca0 R08: 00007fff891afebc R09: 0000000000004000 R10: 00007fff891afec0 R11: 0000000000000246 R12: 00007fff891aff20 R13: 0000000000000003 R14: 0000000000746f20 R15: 0000000000000029 Modules linked in: CR2: ffffc90000207030 ---[ end trace 14a3f30825a0c2e5 ]--- RIP: 0010:bpf_dispatcher_nop_func include/linux/bpf.h:651 [inline] RIP: 0010:__bpf_trace_run kernel/trace/bpf_trace.c:2088 [inline] RIP: 0010:bpf_trace_run2+0x92/0x1b0 kernel/trace/bpf_trace.c:2125 Code: 3d 34 d9 93 03 00 0f 84 e8 00 00 00 be 28 08 00 00 48 c7 c7 7a 62 0c 84 e8 0b 96 f0 ff 0f 1f 44 00 00 48 8d 73 38 48 8d 7d d8 53 30 e8 36 28 f3 01 85 c0 74 0d 80 3d fc d8 93 03 00 0f 84 80 RSP: 0018:ffffc90000463eb8 EFLAGS: 00010202 RAX: 0000000080000001 RBX: ffffc90000207000 RCX: 00000000b2001e43 RDX: ffffffff81311be0 RSI: ffffc90000207038 RDI: ffffc90000463ec0 RBP: ffffc90000463ee8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000463f58 R13: 0000000000000037 R14: 0000000000000037 R15: 0000000000000000 FS: 0000000001a4b940(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000207030 CR3: 000000010c824004 CR4: 00000000001706f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400