====================================== | [ 130.854960][ T68] ================================================================== | [ 130.855493][ T68] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 130.856005][ T68] Read of size 1 at addr ffff8880029be43c by task kworker/u8:1/68 | [ 130.856474][ T68] [ 130.857027][ T68] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 130.857789][ T68] Workqueue: netns cleanup_net [ 130.858130][ T68] Call Trace: [ 130.858335][ T68] [ 130.858509][ T68] dump_stack_lvl (lib/dump_stack.c:107) [ 130.858828][ T68] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 130.859194][ T68] ? kobject_put (lib/kobject.c:729) [ 130.859434][ T68] print_report (mm/kasan/report.c:489) [ 130.859671][ T68] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) [ 130.859968][ T68] kasan_report (mm/kasan/report.c:603) [ 130.860278][ T68] ? kobject_put (lib/kobject.c:729) [ 130.860518][ T68] kobject_put (lib/kobject.c:729) [ 130.860764][ T68] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 130.861190][ T68] br_dev_delete (net/bridge/br_if.c:396) bridge [ 130.861556][ T68] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 130.861931][ T68] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 130.862204][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 130.862522][ T68] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 130.862844][ T68] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 130.863110][ T68] ? process_one_work (kernel/workqueue.c:2609) [ 130.863428][ T68] process_one_work (kernel/workqueue.c:2638) [ 130.863743][ T68] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 130.864022][ T68] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 130.864451][ T68] ? assign_work (kernel/workqueue.c:1101) [ 130.864702][ T68] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 130.864952][ T68] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 130.865330][ T68] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 130.865657][ T68] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 130.865985][ T68] kthread (kernel/kthread.c:388) [ 130.866257][ T68] ? __pfx_kthread (kernel/kthread.c:341) [ 130.866529][ T68] ret_from_fork (arch/x86/kernel/process.c:153) [ 130.866821][ T68] ? __pfx_kthread (kernel/kthread.c:341) [ 130.867118][ T68] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 130.889271][ T68] ------------[ cut here ]------------ | [ 130.889614][ T68] refcount_t: underflow; use-after-free. | [ 130.889968][ T68] WARNING: CPU: 3 PID: 68 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 130.890589][ T68] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel act_mirred act_gact cls_flower bridge stp llc ip_gre gre sch_ingress 8021q vrf veth [ 130.892296][ T68] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 130.893054][ T68] Workqueue: netns cleanup_net [ 130.893398][ T68] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 130.893792][ T68] Code: 64 5d 03 80 fb 01 0f 87 54 5a 91 01 83 e3 01 0f 85 4d ff ff ff c6 05 d6 64 5d 03 01 90 48 c7 c7 00 58 c2 a0 e8 5e 4c 2b ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 7c 23 a7 ff e9 b6 fe ff ff All code ======== 0: 64 5d fs pop %rbp 2: 03 80 fb 01 0f 87 add -0x78f0fe05(%rax),%eax 8: 54 push %rsp 9: 5a pop %rdx a: 91 xchg %eax,%ecx b: 01 83 e3 01 0f 85 add %eax,-0x7af0fe1d(%rbx) 11: 4d ff rex.WRB (bad) 13: ff (bad) 14: ff c6 inc %esi 16: 05 d6 64 5d 03 add $0x35d64d6,%eax 1b: 01 90 48 c7 c7 00 add %edx,0xc7c748(%rax) 21: 58 pop %rax 22: c2 a0 e8 ret $0xe8a0 25: 5e pop %rsi 26: 4c 2b ff sub %rdi,%r15 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: e9 2f ff ff ff jmp 0xffffffffffffff62 33: 48 89 df mov %rbx,%rdi 36: e8 7c 23 a7 ff call 0xffffffffffa723b7 3b: e9 b6 fe ff ff jmp 0xfffffffffffffef6 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: e9 2f ff ff ff jmp 0xffffffffffffff38 9: 48 89 df mov %rbx,%rdi c: e8 7c 23 a7 ff call 0xffffffffffa7238d 11: e9 b6 fe ff ff jmp 0xfffffffffffffecc [ 130.895051][ T68] RSP: 0018:ffffc900004efb98 EFLAGS: 00010282 [ 130.895474][ T68] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9e10e74f [ 130.895997][ T68] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 130.896705][ T68] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff5200009df18 [ 130.897319][ T68] R10: ffffc900004ef8c7 R11: 205d383654202020 R12: ffff88800a142000 [ 130.897815][ T68] R13: ffff88800a142dd8 R14: ffffc900004efc98 R15: ffff88800a142ba0 [ 130.898452][ T68] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 130.898996][ T68] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 130.899491][ T68] CR2: 00007f2e4482c2a8 CR3: 0000000022b1e006 CR4: 00000000001706f0 [ 130.900298][ T68] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 130.900789][ T68] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 130.901422][ T68] Call Trace: [ 130.901685][ T68] [ 130.901845][ T68] ? __warn (kernel/panic.c:677) [ 130.902295][ T68] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 130.902662][ T68] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 130.903001][ T68] ? vprintk_emit (kernel/printk/printk.c:2313) [ 130.903454][ T68] ? handle_bug (arch/x86/kernel/traps.c:238) [ 130.903735][ T68] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 130.904052][ T68] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 130.904499][ T68] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 130.904743][ T68] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 130.905068][ T68] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 130.905390][ T68] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 130.905749][ T68] br_dev_delete (net/bridge/br_if.c:396) bridge [ 130.906155][ T68] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 130.906571][ T68] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 130.906873][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 130.907381][ T68] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 130.907712][ T68] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 130.908084][ T68] ? process_one_work (kernel/workqueue.c:2609) [ 130.908472][ T68] process_one_work (kernel/workqueue.c:2638) [ 130.908769][ T68] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 130.909012][ T68] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 130.909314][ T68] ? assign_work (kernel/workqueue.c:1101) [ 130.909562][ T68] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 130.909815][ T68] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 130.910182][ T68] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 130.910457][ T68] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 130.910728][ T68] kthread (kernel/kthread.c:388) [ 130.910952][ T68] ? __pfx_kthread (kernel/kthread.c:341) [ 130.911216][ T68] ret_from_fork (arch/x86/kernel/process.c:153) [ 130.911476][ T68] ? __pfx_kthread (kernel/kthread.c:341) [ 130.911742][ T68] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 130.915526][ T68] ------------[ cut here ]------------ | [ 130.915925][ T68] sysfs group 'bridge' not found for kobject 'br1' | [ 130.916440][ T68] WARNING: CPU: 3 PID: 68 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 130.917037][ T68] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel act_mirred act_gact cls_flower bridge stp llc ip_gre gre sch_ingress 8021q vrf veth [ 130.919488][ T68] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 130.920216][ T68] Workqueue: netns cleanup_net [ 130.920493][ T68] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 130.920821][ T68] Code: 89 d9 49 8b 14 24 48 b8 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 01 00 75 45 48 8b 33 48 c7 c7 a0 99 bc a0 e8 10 18 5f ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 69 ee da ff All code ======== 0: 89 d9 mov %ebx,%ecx 2: 49 8b 14 24 mov (%r12),%rdx 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 48 c1 e9 03 shr $0x3,%rcx 14: 80 3c 01 00 cmpb $0x0,(%rcx,%rax,1) 18: 75 45 jne 0x5f 1a: 48 8b 33 mov (%rbx),%rsi 1d: 48 c7 c7 a0 99 bc a0 mov $0xffffffffa0bc99a0,%rdi 24: e8 10 18 5f ff call 0xffffffffff5f1839 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 90 nop 2d: 90 nop 2e: 48 83 c4 08 add $0x8,%rsp 32: 5b pop %rbx 33: 5d pop %rbp 34: 41 5c pop %r12 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 69 ee da ff call 0xffffffffffdaeea9 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 90 nop 3: 90 nop 4: 48 83 c4 08 add $0x8,%rsp 8: 5b pop %rbx 9: 5d pop %rbp a: 41 5c pop %r12 c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: e8 69 ee da ff call 0xffffffffffdaee7f [ 130.921911][ T68] RSP: 0018:ffffc900004efba0 EFLAGS: 00010282 [ 130.922295][ T68] RAX: 0000000000000000 RBX: ffffffffc0457f00 RCX: ffffffff9e10e74f [ 130.922732][ T68] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 130.923210][ T68] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009df19 [ 130.923668][ T68] R10: ffffc900004ef8cf R11: 205d383654202020 R12: ffff88800a142610 [ 130.924153][ T68] R13: ffff88800a142dd8 R14: ffffc900004efc98 R15: ffff88800a142ba0 [ 130.924575][ T68] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 130.925079][ T68] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 130.925461][ T68] CR2: 00007f2e4482c2a8 CR3: 0000000022b1e006 CR4: 00000000001706f0 [ 130.925887][ T68] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 130.926322][ T68] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 130.926740][ T68] Call Trace: [ 130.926919][ T68] [ 130.927085][ T68] ? __warn (kernel/panic.c:677) [ 130.927337][ T68] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 130.927608][ T68] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 130.927890][ T68] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 130.928214][ T68] ? handle_bug (arch/x86/kernel/traps.c:238) [ 130.928450][ T68] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 130.928701][ T68] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 130.928976][ T68] ? desc_read (./arch/x86/include/asm/atomic64_64.h:20 ./include/linux/atomic/atomic-arch-fallback.h:2615 ./include/linux/atomic/atomic-long.h:79 ./include/linux/atomic/atomic-instrumented.h:3196 kernel/printk/printk_ringbuffer.c:534) [ 130.929245][ T68] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 130.929545][ T68] br_dev_delete (net/bridge/br_if.c:396) bridge [ 130.929909][ T68] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 130.930319][ T68] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 130.930587][ T68] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 130.930906][ T68] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 130.931205][ T68] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 130.931475][ T68] ? process_one_work (kernel/workqueue.c:2609) [ 130.931769][ T68] process_one_work (kernel/workqueue.c:2638) [ 130.932038][ T68] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 130.932408][ T68] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 130.932706][ T68] ? assign_work (kernel/workqueue.c:1101) [ 130.932957][ T68] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 130.933222][ T68] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 130.933571][ T68] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 130.933865][ T68] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 130.934176][ T68] kthread (kernel/kthread.c:388) [ 130.934419][ T68] ? __pfx_kthread (kernel/kthread.c:341) [ 130.934687][ T68] ret_from_fork (arch/x86/kernel/process.c:153) [ 130.934941][ T68] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: dump_stack_lvl:print_report:kasan_report:kobject_put refcount_warn_saturate:br_sysfs_delbr:br_dev_delete:br_net_exit_batch_rtnl sysfs_remove_group:br_dev_delete:br_net_exit_batch_rtnl:cleanup_net