ci starts bisection 2023-04-02 17:22:50.720849718 +0000 UTC m=+363511.167197694 bisecting fixing commit since 84368d882b9688bfac77ce48d33b1e20a4e4a787 building syzkaller on 5bb7001449cd1dae6cbff2d660374d6d17cbd2c4 ensuring issue is reproducible on original commit 84368d882b9688bfac77ce48d33b1e20a4e4a787 testing commit 84368d882b9688bfac77ce48d33b1e20a4e4a787 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 1f66fd8851368002bab86275fe6e4b216bff9a0f63babf1ace023f0d3179c974 run #0: crashed: general protection fault in hci_uart_tty_ioctl run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: general protection fault in hci_uart_tty_ioctl run #3: crashed: general protection fault in hci_uart_tty_ioctl run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: INFO: rcu detected stall in corrupted run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: general protection fault in hci_uart_tty_ioctl run #10: crashed: INFO: rcu detected stall in corrupted run #11: crashed: INFO: rcu detected stall in corrupted run #12: crashed: general protection fault in hci_uart_tty_ioctl run #13: crashed: general protection fault in hci_uart_tty_ioctl run #14: crashed: general protection fault in hci_uart_tty_ioctl run #15: crashed: general protection fault in hci_uart_tty_ioctl run #16: crashed: general protection fault in hci_uart_tty_ioctl run #17: crashed: general protection fault in hci_uart_tty_ioctl run #18: crashed: general protection fault in hci_uart_tty_ioctl run #19: crashed: general protection fault in hci_uart_tty_ioctl testing current HEAD 00c7b5f4ddc5b346df62b757ec73f9357bb452af testing commit 00c7b5f4ddc5b346df62b757ec73f9357bb452af gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: cd454252cf5efefc88ce95a2b0bfac1a0bd668282945d1e63c4480a15764ab9c run #0: crashed: general protection fault in hci_uart_tty_ioctl run #1: crashed: general protection fault in hci_uart_tty_ioctl run #2: crashed: general protection fault in hci_uart_tty_ioctl run #3: crashed: general protection fault in hci_uart_tty_ioctl run #4: crashed: general protection fault in hci_uart_tty_ioctl run #5: crashed: general protection fault in hci_uart_tty_ioctl run #6: crashed: general protection fault in hci_uart_tty_ioctl run #7: crashed: general protection fault in hci_uart_tty_ioctl run #8: crashed: general protection fault in hci_uart_tty_ioctl run #9: OK revisions tested: 2, total time: 36m26.82443281s (build: 18m31.618117225s, test: 17m2.086514137s) the crash still happens on HEAD commit msg: Merge tag 'input-for-v6.3-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input crash: general protection fault in hci_uart_tty_ioctl general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 15154 Comm: syz-executor380 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:hci_uart_tty_ioctl+0x1da/0xaa0 drivers/bluetooth/hci_ldisc.c:774 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b0 07 00 00 48 8b 9b b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 4d 07 00 00 44 8b 23 e9 31 ff RSP: 0018:ffffc90005cb7d28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86a2b279 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888077e3ecb8 RBP: ffff888077e3ec18 R08: 0000000000000000 R09: ffff888077e3ec1f R10: ffffed100efc7d83 R11: 0000000000086001 R12: ffff888029277000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffffffffea FS: 00007f35dcdf3700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000088 CR3: 0000000029a28000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tty_ioctl+0x6fb/0x12e0 drivers/tty/tty_io.c:2786 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x123/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f35dce62cb9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f35dcdf3268 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f35dceea4d0 RCX: 00007f35dce62cb9 RDX: 0000000000000000 RSI: 00000000800455c9 RDI: 0000000000000003 RBP: 00007f35dceb806c R08: 00007f35dcdf3700 R09: 0000000000000000 R10: 00007f35dcdf3700 R11: 0000000000000246 R12: 00007f35dcdf3280 R13: 6d74702f7665642f R14: 00007f35dcdf327c R15: 00007f35dceea4d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:hci_uart_tty_ioctl+0x1da/0xaa0 drivers/bluetooth/hci_ldisc.c:774 Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b0 07 00 00 48 8b 9b b8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 4d 07 00 00 44 8b 23 e9 31 ff RSP: 0018:ffffc90005cb7d28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff86a2b279 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888077e3ecb8 RBP: ffff888077e3ec18 R08: 0000000000000000 R09: ffff888077e3ec1f R10: ffffed100efc7d83 R11: 0000000000086001 R12: ffff888029277000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffffffffea FS: 00007f35dcdf3700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000088 CR3: 0000000029a28000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: df 48 89 fisttps -0x77(%rax) 3: fa cli 4: 48 c1 ea 03 shr $0x3,%rdx 8: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) c: 0f 85 b0 07 00 00 jne 0x7c2 12: 48 8b 9b b8 00 00 00 mov 0xb8(%rbx),%rbx 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e 4d 07 00 00 jle 0x787 3a: 44 8b 23 mov (%rbx),%r12d 3d: e9 .byte 0xe9 3e: 31 ff xor %edi,%edi