====================================== | [ 1427.059889][ T11] ================================================================== | [ 1427.060387][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 1427.060865][ T11] Read of size 1 at addr ffff888006ff6e3c by task kworker/u8:0/11 | [ 1427.061314][ T11] [ 1427.061903][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1427.062564][ T11] Workqueue: netns cleanup_net [ 1427.062884][ T11] Call Trace: [ 1427.063069][ T11] [ 1427.063232][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 1427.063482][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 1427.063844][ T11] ? kobject_put (lib/kobject.c:729) [ 1427.064090][ T11] print_report (mm/kasan/report.c:489) [ 1427.064338][ T11] ? 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) [ 1427.064648][ T11] kasan_report (mm/kasan/report.c:603) [ 1427.064905][ T11] ? kobject_put (lib/kobject.c:729) [ 1427.065222][ T11] kobject_put (lib/kobject.c:729) [ 1427.065478][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 1427.065869][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 1427.066257][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 1427.066678][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1427.067015][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 1427.067355][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1427.067631][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1427.067932][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 1427.068307][ T11] process_one_work (kernel/workqueue.c:2638) [ 1427.068606][ T11] ? 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) [ 1427.068874][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1427.069242][ T11] ? assign_work (kernel/workqueue.c:1101) [ 1427.069556][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1427.069860][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1427.070208][ T11] kthread (kernel/kthread.c:388) [ 1427.070498][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 1427.070779][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 1427.071057][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 1427.071370][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1427.093385][ T11] ------------[ cut here ]------------ | [ 1427.093746][ T11] refcount_t: underflow; use-after-free. | [ 1427.094196][ T11] WARNING: CPU: 2 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 1427.094786][ T11] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel act_police act_mirred cls_flower ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress em_meta cls_basic sch_ets sch_tbf bridge stp llc 8021q vrf veth [ 1427.096740][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1427.097601][ T11] Workqueue: netns cleanup_net [ 1427.097906][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1427.098379][ T11] 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 e2 bb 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: e2 bb loop 0xffffffffffffffdf 24: e8 5e 4c 2b ff call 0xffffffffff2b4c87 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 [ 1427.099572][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 1427.099992][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb930e74f [ 1427.100465][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1427.101001][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 1427.101481][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800ab62000 [ 1427.102015][ T11] R13: ffff88800ab62dd8 R14: ffffc900000bfc98 R15: ffff88800ab62ba0 [ 1427.102495][ T11] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 1427.103072][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1427.103488][ T11] CR2: 000055d4ef1b545c CR3: 0000000006e90002 CR4: 00000000001706f0 [ 1427.103994][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1427.104442][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1427.105092][ T11] Call Trace: [ 1427.105289][ T11] [ 1427.105491][ T11] ? __warn (kernel/panic.c:677) [ 1427.105733][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1427.106296][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1427.106594][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 1427.107007][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1427.107291][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1427.107576][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1427.107914][ T11] ? 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) [ 1427.108313][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1427.108619][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1427.108985][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 1427.109355][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 1427.109740][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 1427.110117][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1427.110375][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 1427.110685][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1427.110967][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1427.111224][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 1427.111526][ T11] process_one_work (kernel/workqueue.c:2638) [ 1427.111807][ T11] ? 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) [ 1427.112068][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1427.112370][ T11] ? assign_work (kernel/workqueue.c:1101) [ 1427.112631][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1427.112905][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1427.113230][ T11] kthread (kernel/kthread.c:388) [ 1427.113457][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 1427.113762][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 1427.114161][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 1427.114414][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1427.117984][ T11] ------------[ cut here ]------------ | [ 1427.118355][ T11] sysfs group 'bridge' not found for kobject 'br1' | [ 1427.118884][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1427.119567][ T11] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel act_police act_mirred cls_flower ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress em_meta cls_basic sch_ets sch_tbf bridge stp llc 8021q vrf veth [ 1427.121401][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1427.122052][ T11] Workqueue: netns cleanup_net [ 1427.122311][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1427.122628][ T11] 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 dc bb 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 dc bb mov $0xffffffffbbdc99a0,%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 [ 1427.123661][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 1427.123992][ T11] RAX: 0000000000000000 RBX: ffffffffc0543f00 RCX: ffffffffb930e74f [ 1427.124418][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1427.124847][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 1427.125277][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800ab62610 [ 1427.125697][ T11] R13: ffff88800ab62dd8 R14: ffffc900000bfc98 R15: ffff88800ab62ba0 [ 1427.126124][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 1427.126595][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1427.126957][ T11] CR2: 000000000044a3a0 CR3: 0000000006e90004 CR4: 00000000001706f0 [ 1427.127379][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1427.127805][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1427.128232][ T11] Call Trace: [ 1427.128421][ T11] [ 1427.128581][ T11] ? __warn (kernel/panic.c:677) [ 1427.128804][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1427.129131][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1427.129409][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1427.129654][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1427.129943][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1427.130195][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1427.130475][ T11] ? 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) [ 1427.130712][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1427.130998][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 1427.131334][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 1427.131783][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1427.132030][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 1427.132330][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1427.132669][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1427.132930][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 1427.133272][ T11] process_one_work (kernel/workqueue.c:2638) [ 1427.133541][ T11] ? 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) [ 1427.133783][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1427.134145][ T11] ? assign_work (kernel/workqueue.c:1101) [ 1427.134393][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1427.134711][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1427.135070][ T11] kthread (kernel/kthread.c:388) [ 1427.135312][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 1427.135613][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 1427.135851][ T11] ? __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