====================================== | [ 68.775589][ T792] drop_monitor: Initializing network drop monitor service | [ 79.472911][ T804] ------------[ cut here ]------------ | [ 79.474204][ T804] WARNING: drivers/net/netdevsim/netdev.c:1234 at nsim_destroy+0x128/0x780 [netdevsim], CPU#2: echo/804 | [ 79.474689][ T804] Modules linked in: drop_monitor act_gact cls_flower sch_ingress netdevsim psample sctp [ 79.475619][ T804] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 79.476004][ T804] RIP: 0010:nsim_destroy (drivers/net/netdevsim/netdev.c:1234 (discriminator 2)) netdevsim [ 79.476372][ T804] Code: 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 0f 85 e5 05 00 00 48 8b 3b e8 94 13 a4 d7 31 c0 48 8d ab 48 07 00 00 eb 07 90 <0f> 0b 90 83 c0 01 0f b7 d0 be 00 10 00 00 48 89 ef e8 b2 6e e2 d6 All code ======== 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 fc add %bh,%ah 6: ff lcall (bad) 7: df 48 c1 fisttps -0x3f(%rax) a: e9 03 80 3c 01 jmp 0x13c8012 f: 00 0f add %cl,(%rdi) 11: 85 e5 test %esp,%ebp 13: 05 00 00 48 8b add $0x8b480000,%eax 18: 3b e8 cmp %eax,%ebp 1a: 94 xchg %eax,%esp 1b: 13 a4 d7 31 c0 48 8d adc -0x72b73fcf(%rdi,%rdx,8),%esp 22: ab stos %eax,(%rdi) 23: 48 07 rex.W (bad) 25: 00 00 add %al,(%rax) 27: eb 07 jmp 0x30 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 83 c0 01 add $0x1,%eax 30: 0f b7 d0 movzwl %ax,%edx 33: be 00 10 00 00 mov $0x1000,%esi 38: 48 89 ef mov %rbp,%rdi 3b: e8 b2 6e e2 d6 call 0xffffffffd6e26ef2 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 83 c0 01 add $0x1,%eax 6: 0f b7 d0 movzwl %ax,%edx 9: be 00 10 00 00 mov $0x1000,%esi e: 48 89 ef mov %rbp,%rdi 11: e8 b2 6e e2 d6 call 0xffffffffd6e26ec8 [ 79.477089][ T804] RSP: 0018:ffa00000005c79b8 EFLAGS: 00010293 [ 79.477443][ T804] RAX: 0000000000000000 RBX: ff1100000ec6ad40 RCX: ff1100000ec6b488 [ 79.477831][ T804] RDX: 0000000000000000 RSI: 0000000000000000 RDI: dffffc0000000000 [ 79.478200][ T804] RBP: ff1100000ec6b488 R08: ff1100000ec6b488 R09: 0000000000000000 [ 79.478579][ T804] R10: 1fe2200001d8d691 R11: 0000000000000001 R12: ff11000004ed8c98 [ 79.478989][ T804] R13: dffffc0000000000 R14: ff11000004ed8800 R15: ffffffffc063a380 [ 79.479373][ T804] FS: 00007facf1e25780(0000) GS:ff110000cacd5000(0000) knlGS:0000000000000000 [ 79.479791][ T804] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 79.480133][ T804] CR2: 000056106a02a5d8 CR3: 000000000983c001 CR4: 0000000000771ef0 [ 79.480499][ T804] PKRU: 55555554 [ 79.480748][ T804] Call Trace: [ 79.480991][ T804] [ 79.481119][ T804] ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:752 (discriminator 1)) [ 79.481329][ T804] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:444 drivers/net/netdevsim/dev.c:1529) netdevsim [ 79.481570][ T804] ? devl_lock_is_held (net/devlink/core.c:285 (discriminator 1)) [ 79.481771][ T804] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1538 (discriminator 4) drivers/net/netdevsim/dev.c:1764 (discriminator 4)) netdevsim [ 79.482028][ T804] nsim_drv_remove (drivers/net/netdevsim/dev.c:1781) netdevsim [ 79.482231][ T804] device_release_driver_internal (drivers/base/dd.c:1286 drivers/base/dd.c:1307) [ 79.482471][ T804] ? sysfs_file_ops (fs/sysfs/file.c:135) [ 79.482670][ T804] bus_remove_device (./include/linux/kobject.h:193 drivers/base/base.h:73 drivers/base/bus.c:623) [ 79.482873][ T804] ? sysfs_file_ops (fs/sysfs/file.c:135) [ 79.483093][ T804] device_del (drivers/base/core.c:3879) [ 79.483262][ T804] ? __device_link_del (drivers/base/core.c:3833) [ 79.483467][ T804] ? sysfs_file_ops (fs/sysfs/file.c:135) [ 79.483666][ T804] device_unregister (drivers/base/core.c:3796 drivers/base/core.c:3920) [ 79.483869][ T804] del_device_store (drivers/net/netdevsim/bus.c:248) netdevsim [ 79.484132][ T804] ? sysfs_file_kobj (./include/linux/rcupdate.h:322 (discriminator 1) ./include/linux/rcupdate.h:881 (discriminator 1) ./include/linux/rcupdate.h:1193 (discriminator 1) fs/sysfs/file.c:24 (discriminator 1)) [ 79.484330][ T804] ? nsim_bus_dev_numvfs_show (drivers/net/netdevsim/bus.c:215) netdevsim [ 79.484570][ T804] ? sysfs_file_kobj (fs/sysfs/file.c:26) [ 79.484771][ T804] ? sysfs_kf_write (fs/sysfs/file.c:139) [ 79.484989][ T804] kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356) [ 79.485191][ T804] ? kernfs_ops (fs/kernfs/file.c:312) [ 79.485357][ T804] new_sync_write (fs/read_write.c:596 (discriminator 1)) [ 79.485562][ T804] ? new_sync_read (fs/read_write.c:586) [ 79.485762][ T804] ? lock_acquire.part.0 (kernel/locking/lockdep.c:470 kernel/locking/lockdep.c:5870) [ 79.485974][ T804] ? ksys_write (fs/read_write.c:741) [ 79.486185][ T804] vfs_write (fs/read_write.c:688) [ 79.486348][ T804] ksys_write (fs/read_write.c:741) [ 79.486512][ T804] ? __ia32_sys_read (fs/read_write.c:730) [ 79.486710][ T804] ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:949 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:401 (discriminator 4) ./include/linux/refcount.h:389 (discriminator 4) ./include/linux/refcount.h:432 (discriminator 4) ./include/linux/mmap_lock.h:196 (discriminator 4) ./include/linux/mmap_lock.h:217 (discriminator 4) ./include/linux/mmap_lock.h:264 (discriminator 4) arch/x86/mm/fault.c:1336 (discriminator 4)) [ 79.486914][ T804] ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:752 (discriminator 1)) [ 79.487138][ T804] ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 1) kernel/rcu/tree.c:752 (discriminator 1)) [ 79.487339][ T804] do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) [ 79.487539][ T804] ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3)) [ 79.487741][ T804] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 79.487993][ T804] RIP: 0033:0x7facf1e96c5e [ 79.488202][ T804] Code: 4d 89 d8 e8 34 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa All code ======== 0: 4d 89 d8 mov %r11,%r8 3: e8 34 bd 00 00 call 0xbd3c 8: 4c 8b 5d f8 mov -0x8(%rbp),%r11 c: 41 8b 93 08 03 00 00 mov 0x308(%r11),%edx 13: 59 pop %rcx 14: 5e pop %rsi 15: 48 83 f8 fc cmp $0xfffffffffffffffc,%rax 19: 74 11 je 0x2c 1b: c9 leave 1c: c3 ret 1d: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 24: 48 8b 45 10 mov 0x10(%rbp),%rax 28: 0f 05 syscall 2a:* c9 leave <-- trapping instruction 2b: c3 ret 2c: 83 e2 39 and $0x39,%edx 2f: 83 fa 08 cmp $0x8,%edx 32: 75 e7 jne 0x1b 34: e8 13 ff ff ff call 0xffffffffffffff4c 39: 0f 1f 00 nopl (%rax) 3c: f3 0f 1e fa endbr64 Code starting with the faulting instruction =========================================== 0: c9 leave 1: c3 ret 2: 83 e2 39 and $0x39,%edx 5: 83 fa 08 cmp $0x8,%edx 8: 75 e7 jne 0xfffffffffffffff1 a: e8 13 ff ff ff call 0xffffffffffffff22 f: 0f 1f 00 nopl (%rax) 12: f3 0f 1e fa endbr64 [ 79.488789][ T804] RSP: 002b:00007ffe263d14e0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 [ 79.489089][ T804] RAX: ffffffffffffffda RBX: 00007facf20125c0 RCX: 00007facf1e96c5e [ 79.489363][ T804] RDX: 0000000000000005 RSI: 000056106a0295d0 RDI: 0000000000000001 [ 79.489638][ T804] RBP: 00007ffe263d14f0 R08: 0000000000000000 R09: 0000000000000000 [ 79.489915][ T804] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000005 Finger prints: nsim_destroy:__nsim_dev_port_del:nsim_dev_reload_destroy:nsim_drv_remove:device_release_driver_internal