* [syzbot ci] Re: macvlan: allow source mode devices along with passthru [not found] <20260709091138.170348-1-t.martitz@fritz.com> @ 2026-07-10 7:48 ` syzbot ci 0 siblings, 0 replies; 2+ messages in thread From: syzbot ci @ 2026-07-10 7:48 UTC (permalink / raw) To: andrew, davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni, t.martitz Cc: syzbot, syzkaller-bugs syzbot ci has tested the following series [v2] macvlan: allow source mode devices along with passthru https://lore.kernel.org/all/20260709091138.170348-1-t.martitz@fritz.com * [PATCH v2 1/1] macvlan: allow source mode devices along with passthru and found the following issue: general protection fault in macvlan_port_release_mac Full report is available here: https://ci.syzbot.org/series/72476997-558e-41ae-b146-c05346cdd7f6 *** general protection fault in macvlan_port_release_mac tree: net-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git base: fe3e786ef4eb6e47d2901f568a27bd920477bbe9 arch: amd64 compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6 config: https://ci.syzbot.org/builds/0c5e2f82-62bd-40bf-a873-66f277607c07/config syz repro: https://ci.syzbot.org/findings/d5d14725-5a48-484c-876d-026175d0b21a/syz_repro batman_adv: batadv0: Removing interface: batadv_slave_1 veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode Oops: general protection fault, probably for non-canonical address 0xdffffc0000000118: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000008c0-0x00000000000008c7] CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:macvlan_passthru drivers/net/macvlan.c:78 [inline] RIP: 0010:macvlan_port_release_mac+0x138/0x490 drivers/net/macvlan.c:807 Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 b9 30 ae fb 48 8b 1b 4c 8d b3 c0 08 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 44 02 00 00 45 8b 36 44 89 f6 83 e6 01 RSP: 0018:ffffc90000127500 EFLAGS: 00010206 RAX: 0000000000000118 RBX: 0000000000000000 RCX: ffff888102ec5940 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000127630 R08: ffffffff9032faf7 R09: 1ffffffff2065f5e R10: dffffc0000000000 R11: fffffbfff2065f5f R12: dffffc0000000000 R13: 1ffff92000024ea4 R14: 00000000000008c0 R15: ffff888109b28818 FS: 0000000000000000(0000) GS:ffff8882a9223000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffefe7250d8 CR3: 000000000e746000 CR4: 00000000000006f0 Call Trace: <TASK> macvlan_port_destroy+0x2eb/0x310 drivers/net/macvlan.c:1343 unregister_netdevice_many_notify+0x1ad2/0x2150 net/core/dev.c:12464 unregister_netdevice_many net/core/dev.c:12506 [inline] default_device_exit_batch+0x961/0x9e0 net/core/dev.c:13098 ops_exit_list net/core/net_namespace.c:205 [inline] ops_undo_list+0x4b4/0x8d0 net/core/net_namespace.c:252 cleanup_net+0x572/0x810 net/core/net_namespace.c:702 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:macvlan_passthru drivers/net/macvlan.c:78 [inline] RIP: 0010:macvlan_port_release_mac+0x138/0x490 drivers/net/macvlan.c:807 Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 b9 30 ae fb 48 8b 1b 4c 8d b3 c0 08 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 44 02 00 00 45 8b 36 44 89 f6 83 e6 01 RSP: 0018:ffffc90000127500 EFLAGS: 00010206 RAX: 0000000000000118 RBX: 0000000000000000 RCX: ffff888102ec5940 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000127630 R08: ffffffff9032faf7 R09: 1ffffffff2065f5e R10: dffffc0000000000 R11: fffffbfff2065f5f R12: dffffc0000000000 R13: 1ffff92000024ea4 R14: 00000000000008c0 R15: ffff888109b28818 FS: 0000000000000000(0000) GS:ffff8882a9223000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffefe7250d8 CR3: 000000000e746000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 48 89 add %cl,-0x77(%rax) 5: d8 48 c1 fmuls -0x3f(%rax) 8: e8 03 42 80 3c call 0x3c804210 d: 20 00 and %al,(%rax) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 b9 30 ae fb call 0xfbae30d2 19: 48 8b 1b mov (%rbx),%rbx 1c: 4c 8d b3 c0 08 00 00 lea 0x8c0(%rbx),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 44 02 00 00 jne 0x27b 37: 45 8b 36 mov (%r14),%r14d 3a: 44 89 f6 mov %r14d,%esi 3d: 83 e6 01 and $0x1,%esi *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported. ^ permalink raw reply [flat|nested] 2+ messages in thread
[parent not found: <20260709100512.1383421-1-t.martitz@fritz.com>]
* [syzbot ci] Re: macvlan: allow source mode devices along with passthru [not found] <20260709100512.1383421-1-t.martitz@fritz.com> @ 2026-07-10 9:56 ` syzbot ci 0 siblings, 0 replies; 2+ messages in thread From: syzbot ci @ 2026-07-10 9:56 UTC (permalink / raw) To: andrew, davem, edumazet, horms, kuba, linux-kernel, netdev, pabeni, t.martitz Cc: syzbot, syzkaller-bugs syzbot ci has tested the following series [v2] macvlan: allow source mode devices along with passthru https://lore.kernel.org/all/20260709100512.1383421-1-t.martitz@fritz.com * [PATCH v2 1/1] macvlan: allow source mode devices along with passthru and found the following issue: general protection fault in macvlan_port_release_mac Full report is available here: https://ci.syzbot.org/series/2632619d-fb66-47ac-85a1-a781bbb0d57d *** general protection fault in macvlan_port_release_mac tree: net-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git base: fe3e786ef4eb6e47d2901f568a27bd920477bbe9 arch: amd64 compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6 config: https://ci.syzbot.org/builds/90f86060-ab12-43d6-a718-5d0f5eb5df09/config syz repro: https://ci.syzbot.org/findings/d1f12788-51d7-4251-8fc9-6bfda6a1e20a/syz_repro batman_adv: batadv0: Removing interface: batadv_slave_1 veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode Oops: general protection fault, probably for non-canonical address 0xdffffc0000000118: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000008c0-0x00000000000008c7] CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:macvlan_passthru drivers/net/macvlan.c:78 [inline] RIP: 0010:macvlan_port_release_mac+0x138/0x490 drivers/net/macvlan.c:807 Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 b9 30 ae fb 48 8b 1b 4c 8d b3 c0 08 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 44 02 00 00 45 8b 36 44 89 f6 83 e6 01 RSP: 0018:ffffc90000117500 EFLAGS: 00010206 RAX: 0000000000000118 RBX: 0000000000000000 RCX: ffff888102e98000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000117630 R08: ffffffff9032faf7 R09: 1ffffffff2065f5e R10: dffffc0000000000 R11: fffffbfff2065f5f R12: dffffc0000000000 R13: 1ffff92000022ea4 R14: 00000000000008c0 R15: ffff88816b068818 FS: 0000000000000000(0000) GS:ffff88818dc23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb0fefe8158 CR3: 0000000113c9a000 CR4: 00000000000006f0 Call Trace: <TASK> macvlan_port_destroy+0x2eb/0x310 drivers/net/macvlan.c:1343 unregister_netdevice_many_notify+0x1ad2/0x2150 net/core/dev.c:12464 unregister_netdevice_many net/core/dev.c:12506 [inline] default_device_exit_batch+0x961/0x9e0 net/core/dev.c:13098 ops_exit_list net/core/net_namespace.c:205 [inline] ops_undo_list+0x4b4/0x8d0 net/core/net_namespace.c:252 cleanup_net+0x572/0x810 net/core/net_namespace.c:702 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:macvlan_passthru drivers/net/macvlan.c:78 [inline] RIP: 0010:macvlan_port_release_mac+0x138/0x490 drivers/net/macvlan.c:807 Code: 01 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 b9 30 ae fb 48 8b 1b 4c 8d b3 c0 08 00 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 44 02 00 00 45 8b 36 44 89 f6 83 e6 01 RSP: 0018:ffffc90000117500 EFLAGS: 00010206 RAX: 0000000000000118 RBX: 0000000000000000 RCX: ffff888102e98000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000117630 R08: ffffffff9032faf7 R09: 1ffffffff2065f5e R10: dffffc0000000000 R11: fffffbfff2065f5f R12: dffffc0000000000 R13: 1ffff92000022ea4 R14: 00000000000008c0 R15: ffff88816b068818 FS: 0000000000000000(0000) GS:ffff88818dc23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33163fff CR3: 0000000175a06000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 00 48 89 add %cl,-0x77(%rax) 5: d8 48 c1 fmuls -0x3f(%rax) 8: e8 03 42 80 3c call 0x3c804210 d: 20 00 and %al,(%rax) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 b9 30 ae fb call 0xfbae30d2 19: 48 8b 1b mov (%rbx),%rbx 1c: 4c 8d b3 c0 08 00 00 lea 0x8c0(%rbx),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 44 02 00 00 jne 0x27b 37: 45 8b 36 mov (%r14),%r14d 3a: 44 89 f6 mov %r14d,%esi 3d: 83 e6 01 and $0x1,%esi *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. To test a patch for this bug, please reply with `#syz test` (should be on a separate line). The patch should be attached to the email. Note: arguments like custom git repos and branches are not supported. ^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-07-10 7:48 ` [syzbot ci] Re: macvlan: allow source mode devices along with passthru syzbot ci
[not found] <20260709100512.1383421-1-t.martitz@fritz.com>
2026-07-10 9:56 ` syzbot ci
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