device veth1_macvtap left promiscuous mode device veth0_vlan left promiscuous mode ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:86 [inline] BUG: KASAN: null-ptr-deref in atomic_long_set include/linux/atomic/atomic-instrumented.h:1197 [inline] BUG: KASAN: null-ptr-deref in rwsem_clear_owner kernel/locking/rwsem.c:151 [inline] BUG: KASAN: null-ptr-deref in __up_write kernel/locking/rwsem.c:1413 [inline] BUG: KASAN: null-ptr-deref in up_write+0x38/0x1f0 kernel/locking/rwsem.c:1666 Write of size 8 at addr 0000000000000070 by task kworker/u4:3/323 CPU: 1 PID: 323 Comm: kworker/u4:3 Not tainted 5.15.150-syzkaller-00330-g9044d25b8ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 __kasan_report mm/kasan/report.c:431 [inline] kasan_report+0x16f/0x1c0 mm/kasan/report.c:444 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_write include/linux/instrumented.h:86 [inline] atomic_long_set include/linux/atomic/atomic-instrumented.h:1197 [inline] rwsem_clear_owner kernel/locking/rwsem.c:151 [inline] __up_write kernel/locking/rwsem.c:1413 [inline] up_write+0x38/0x1f0 kernel/locking/rwsem.c:1666 kernfs_drain fs/kernfs/dir.c:475 [inline] __kernfs_remove+0x4b2/0x9d0 fs/kernfs/dir.c:1390 kernfs_remove_by_name_ns+0xec/0x160 fs/kernfs/dir.c:1594 kernfs_remove_by_name include/linux/kernfs.h:619 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x10c/0x2a0 fs/sysfs/group.c:289 sysfs_remove_groups+0x56/0xb0 fs/sysfs/group.c:313 device_remove_groups drivers/base/core.c:2490 [inline] device_remove_attrs+0x124/0x140 drivers/base/core.c:2696 device_del+0x65b/0xe90 drivers/base/core.c:3591 netdev_unregister_kobject+0x18b/0x260 net/core/net-sysfs.c:1980 unregister_netdevice_many+0x1295/0x17c0 net/core/dev.c:11132 default_device_exit_batch+0x38a/0x3f0 net/core/dev.c:11638 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x6ce/0xc00 net/core/net_namespace.c:596 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ================================================================== general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 1 PID: 323 Comm: kworker/u4:3 Tainted: G B 5.15.150-syzkaller-00330-g9044d25b8ff5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: netns cleanup_net RIP: 0010:arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] RIP: 0010:arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] RIP: 0010:atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] RIP: 0010:rwsem_clear_owner kernel/locking/rwsem.c:151 [inline] RIP: 0010:__up_write kernel/locking/rwsem.c:1413 [inline] RIP: 0010:up_write+0x3f/0x1f0 kernel/locking/rwsem.c:1666 Code: fc ff df 0f 1f 44 00 00 bf 01 00 00 00 e8 99 6f f7 ff 49 8d 5f 08 48 89 df be 08 00 00 00 e8 b8 b9 5d 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 42 b8 5d 00 49 c7 47 08 00 00 00 RSP: 0018:ffffc900038975f0 EFLAGS: 00010202 RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88810b7ba780 RDX: 0000000000000000 RSI: 0000000000000296 RDI: 00000000ffffffff RBP: ffffc90003897610 R08: ffffffff8141701b R09: 0000000000000003 R10: fffffbfff0e5284c R11: dffffc0000000001 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff888110f4f004 R15: 0000000000000068 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc0756298 CR3: 000000011f001000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kernfs_drain fs/kernfs/dir.c:475 [inline] __kernfs_remove+0x4b2/0x9d0 fs/kernfs/dir.c:1390 kernfs_remove_by_name_ns+0xec/0x160 fs/kernfs/dir.c:1594 kernfs_remove_by_name include/linux/kernfs.h:619 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0x10c/0x2a0 fs/sysfs/group.c:289 sysfs_remove_groups+0x56/0xb0 fs/sysfs/group.c:313 device_remove_groups drivers/base/core.c:2490 [inline] device_remove_attrs+0x124/0x140 drivers/base/core.c:2696 device_del+0x65b/0xe90 drivers/base/core.c:3591 netdev_unregister_kobject+0x18b/0x260 net/core/net-sysfs.c:1980 unregister_netdevice_many+0x1295/0x17c0 net/core/dev.c:11132 default_device_exit_batch+0x38a/0x3f0 net/core/dev.c:11638 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x6ce/0xc00 net/core/net_namespace.c:596 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Modules linked in: ---[ end trace 45195fd6b9efea6c ]--- RIP: 0010:arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] RIP: 0010:arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] RIP: 0010:atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] RIP: 0010:rwsem_clear_owner kernel/locking/rwsem.c:151 [inline] RIP: 0010:__up_write kernel/locking/rwsem.c:1413 [inline] RIP: 0010:up_write+0x3f/0x1f0 kernel/locking/rwsem.c:1666 Code: fc ff df 0f 1f 44 00 00 bf 01 00 00 00 e8 99 6f f7 ff 49 8d 5f 08 48 89 df be 08 00 00 00 e8 b8 b9 5d 00 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 42 b8 5d 00 49 c7 47 08 00 00 00 RSP: 0018:ffffc900038975f0 EFLAGS: 00010202 RAX: 000000000000000e RBX: 0000000000000070 RCX: ffff88810b7ba780 RDX: 0000000000000000 RSI: 0000000000000296 RDI: 00000000ffffffff RBP: ffffc90003897610 R08: ffffffff8141701b R09: 0000000000000003 R10: fffffbfff0e5284c R11: dffffc0000000001 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff888110f4f004 R15: 0000000000000068 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdc0756298 CR3: 000000011f001000 CR4: 00000000003526a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 5: bf 01 00 00 00 mov $0x1,%edi a: e8 99 6f f7 ff call 0xfff76fa8 f: 49 8d 5f 08 lea 0x8(%r15),%rbx 13: 48 89 df mov %rbx,%rdi 16: be 08 00 00 00 mov $0x8,%esi 1b: e8 b8 b9 5d 00 call 0x5db9d8 20: 48 89 d8 mov %rbx,%rax 23: 48 c1 e8 03 shr $0x3,%rax * 27: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2c: 74 08 je 0x36 2e: 48 89 df mov %rbx,%rdi 31: e8 42 b8 5d 00 call 0x5db878 36: 49 rex.WB 37: c7 .byte 0xc7 38: 47 08 00 rex.RXB or %r8b,(%r8)