ci starts bisection 2023-02-28 15:07:49.965810595 +0000 UTC m=+41995.913698337 bisecting fixing commit since 42226c989789d8da4af1de0c31070c96726d990c building syzkaller on 744a39e220cece33e207035facce6c5ae161b775 ensuring issue is reproducible on original commit 42226c989789d8da4af1de0c31070c96726d990c testing commit 42226c989789d8da4af1de0c31070c96726d990c gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 786a2d138855131e66e1a86c898cd1b1686cc627a22edc504793c3da2b7819b6 all runs: crashed: WARNING in default_device_exit_batch testing current HEAD ae3419fbac845b4d3f3a9fae4cc80c68d82cdf6e testing commit ae3419fbac845b4d3f3a9fae4cc80c68d82cdf6e gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 4c1f95e46b235d7e5ecd14c567444a02348bdd3d86fa216fcc4590788b4dcd93 all runs: crashed: WARNING in default_device_exit_batch revisions tested: 2, total time: 24m50.508602678s (build: 15m10.164499939s, test: 8m35.366756577s) the crash still happens on HEAD commit msg: vc_screen: don't clobber return value in vcs_read crash: WARNING in default_device_exit_batch bridge0: port 2(bridge_slave_1) entered disabled state veth1_macvtap: left promiscuous mode veth0_macvtap: left promiscuous mode veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode bond47 (unregistering): Released all slaves ------------[ cut here ]------------ WARNING: CPU: 0 PID: 11 at net/core/dev.c:10869 unregister_netdevice_many_notify+0x1249/0x16b0 Modules linked in: CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Workqueue: netns cleanup_net RIP: 0010:unregister_netdevice_many_notify+0x1249/0x16b0 Code: 3c 2e fa 4c 8b 64 24 18 4d 8d 74 24 f0 48 8b 44 24 30 42 80 3c 38 00 0f 84 0c fe ff ff 4c 89 ef e8 dc f1 42 fa e9 ff fd ff ff <0f> 0b e9 78 fd ff ff 0f 0b e9 b2 fd ff ff c6 05 5d dc 40 05 01 48 RSP: 0018:ffffc900001078c0 EFLAGS: 00010202 RAX: ffff88807dd6a820 RBX: ffff8880686e40a0 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8c8ed540 RBP: ffffc90000107a70 R08: dffffc0000000000 R09: fffffbfff191daa9 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001079c0 R13: 0000000000000003 R14: ffffc90000107988 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffca02d2008 CR3: 000000000b726000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: default_device_exit_batch+0x3da/0x540 cleanup_net+0x6d4/0xa30 process_one_work+0x7ee/0x1010 worker_thread+0x8c9/0xfd0 kthread+0x232/0x2b0 ret_from_fork+0x1f/0x30