bisecting fixing commit since 414e6c8e941caae43f7b25f8014c2b5e2100679d building syzkaller on e22c3da3b05600c6c0f62142160839b4b7f82a62 testing commit 414e6c8e941caae43f7b25f8014c2b5e2100679d compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 1b52c1ebd702deadf80edce9a022ff40b058ad7ac9b55f4f847ecb7351f9d42c run #0: crashed: general protection fault in ip6_pol_route run #1: crashed: BUG: corrupted list in move_linked_works run #2: crashed: BUG: corrupted list in insert_work run #3: crashed: general protection fault in process_one_work run #4: crashed: general protection fault in dst_dev_put run #5: crashed: BUG: corrupted list in insert_work run #6: crashed: BUG: corrupted list in insert_work run #7: crashed: BUG: corrupted list in insert_work run #8: crashed: BUG: corrupted list in insert_work run #9: crashed: general protection fault in process_one_work run #10: crashed: BUG: corrupted list in insert_work run #11: crashed: BUG: corrupted list in insert_work run #12: crashed: BUG: corrupted list in process_one_work run #13: crashed: general protection fault in process_one_work run #14: crashed: BUG: corrupted list in insert_work run #15: crashed: BUG: corrupted list in insert_work run #16: crashed: BUG: corrupted list in insert_work run #17: crashed: BUG: corrupted list in insert_work run #18: crashed: general protection fault in process_one_work run #19: crashed: BUG: corrupted list in process_one_work testing current HEAD fdd06dc6b0f832a9cd8033438cc3b01d253c3981 testing commit fdd06dc6b0f832a9cd8033438cc3b01d253c3981 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6796432b3f115bd47a85beb27fa07ddb3602ed29df47e221bfccea5568398288 run #0: crashed: general protection fault in dst_dev_put run #1: crashed: general protection fault in process_one_work run #2: crashed: general protection fault in dst_dev_put run #3: crashed: general protection fault in dst_dev_put run #4: crashed: general protection fault in dst_dev_put run #5: crashed: general protection fault in process_one_work run #6: crashed: BUG: corrupted list in insert_work run #7: crashed: general protection fault in process_one_work run #8: crashed: BUG: corrupted list in insert_work run #9: crashed: general protection fault in dst_dev_put revisions tested: 2, total time: 20m36.437970662s (build: 7m36.053961165s, test: 12m30.757799512s) the crash still happens on HEAD commit msg: ANDROID: GKI: db845c: Update symbols list and ABI crash: general protection fault in dst_dev_put general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 5.10.117-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dst_dev_put+0x1a/0x220 net/core/dst.c:156 Code: c1 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 48 89 e5 41 55 41 54 53 <80> 3c 02 00 48 89 fb 0f 85 93 01 00 00 48 8d 7b 3a 4c 8b 2b 48 b8 RSP: 0018:ffffc90000137b98 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffe8ffffc49000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000137bb0 R08: 0000000000000000 R09: ffff88823fe42f00 R10: ffffc90000137840 R11: 0000000000000000 R12: 0000000000000007 R13: fffffbfff0c19848 R14: 0000607e08a49000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005649440253e8 CR3: 000000010b4bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt_fibinfo_free_cpus.part.0+0xb8/0x130 net/ipv4/fib_semantics.c:203 rt_fibinfo_free_cpus net/ipv4/fib_semantics.c:195 [inline] fib_nh_common_release+0x92/0x230 net/ipv4/fib_semantics.c:216 fib_nh_release net/ipv4/fib_semantics.c:228 [inline] free_fib_info_rcu+0xd6/0x130 net/ipv4/fib_semantics.c:240 rcu_do_batch+0x355/0xbb0 kernel/rcu/tree.c:2485 rcu_core+0x46d/0xab0 kernel/rcu/tree.c:2726 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2739 __do_softirq+0x1c6/0x61c kernel/softirq.c:305 run_ksoftirqd+0x26/0x30 kernel/softirq.c:667 smpboot_thread_fn+0x527/0x810 kernel/smpboot.c:164 kthread+0x345/0x420 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Modules linked in: ---[ end trace 716a33c28a9196da ]--- RIP: 0010:dst_dev_put+0x1a/0x220 net/core/dst.c:156 Code: c1 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 48 89 e5 41 55 41 54 53 <80> 3c 02 00 48 89 fb 0f 85 93 01 00 00 48 8d 7b 3a 4c 8b 2b 48 b8 RSP: 0018:ffffc90000137b98 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffe8ffffc49000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000137bb0 R08: 0000000000000000 R09: ffff88823fe42f00 R10: ffffc90000137840 R11: 0000000000000000 R12: 0000000000000007 R13: fffffbfff0c19848 R14: 0000607e08a49000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005649440253e8 CR3: 000000010b4bb000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: c1 cc cc ror $0xcc,%esp 3: cc int3 4: cc int3 5: cc int3 6: cc int3 7: cc int3 8: cc int3 9: cc int3 a: cc int3 b: cc int3 c: cc int3 d: cc int3 e: cc int3 f: cc int3 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 48 89 fa mov %rdi,%rdx 1d: 55 push %rbp 1e: 48 c1 ea 03 shr $0x3,%rdx 22: 48 89 e5 mov %rsp,%rbp 25: 41 55 push %r13 27: 41 54 push %r12 29: 53 push %rbx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 48 89 fb mov %rdi,%rbx 31: 0f 85 93 01 00 00 jne 0x1ca 37: 48 8d 7b 3a lea 0x3a(%rbx),%rdi 3b: 4c 8b 2b mov (%rbx),%r13 3e: 48 rex.W 3f: b8 .byte 0xb8