====================================== | [ 1370.871667][ T71] ================================================================== | [ 1370.872372][ T71] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 1370.872954][ T71] Read of size 1 at addr ffff888004b6e2fc by task kworker/u8:1/71 | [ 1370.873567][ T71] [ 1370.874366][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1370.875246][ T71] Workqueue: netns cleanup_net [ 1370.875621][ T71] Call Trace: [ 1370.875876][ T71] [ 1370.876113][ T71] dump_stack_lvl (lib/dump_stack.c:107) [ 1370.876475][ T71] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 1370.877000][ T71] ? kobject_put (lib/kobject.c:729) [ 1370.877368][ T71] print_report (mm/kasan/report.c:489) [ 1370.877764][ T71] ? 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) [ 1370.878229][ T71] kasan_report (mm/kasan/report.c:603) [ 1370.878621][ T71] ? kobject_put (lib/kobject.c:729) [ 1370.879031][ T71] kobject_put (lib/kobject.c:729) [ 1370.879383][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 1370.879958][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 1370.880518][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 1370.881127][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1370.881527][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 1370.882012][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1370.882433][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1370.882802][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 1370.883221][ T71] process_one_work (kernel/workqueue.c:2638) [ 1370.883645][ T71] ? 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) [ 1370.884005][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1370.884471][ T71] ? assign_work (kernel/workqueue.c:1101) [ 1370.884909][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1370.885302][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1370.885864][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1370.886231][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1370.886509][ T71] kthread (kernel/kthread.c:388) [ 1370.886748][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 1370.886998][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 1370.887288][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 1370.887542][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1370.907674][ T71] ------------[ cut here ]------------ | [ 1370.907989][ T71] refcount_t: underflow; use-after-free. | [ 1370.908416][ T71] WARNING: CPU: 1 PID: 71 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 1370.908965][ T71] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel sch_ets act_mirred cls_matchall sch_red sch_tbf ip6_gre ip6_tunnel tunnel6 ip_gre gre act_gact cls_flower dummy sch_ingress bridge stp llc 8021q vrf veth [ 1370.910818][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1370.911693][ T71] Workqueue: netns cleanup_net [ 1370.911974][ T71] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1370.912473][ T71] 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 42 b4 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: 42 b4 e8 rex.X mov $0xe8,%spl 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 [ 1370.913550][ T71] RSP: 0018:ffffc9000051fb98 EFLAGS: 00010282 [ 1370.913870][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb190e74f [ 1370.914365][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1370.914784][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a3f18 [ 1370.915334][ T71] R10: ffffc9000051f8c7 R11: 205d313754202020 R12: ffff88800b37a000 [ 1370.915820][ T71] R13: ffff88800b37add8 R14: ffffc9000051fc98 R15: ffff88800b37aba0 [ 1370.916361][ T71] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 1370.916917][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1370.917421][ T71] CR2: 00007f705cffd270 CR3: 000000000b1ac006 CR4: 00000000001706f0 [ 1370.917864][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1370.918437][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1370.918868][ T71] Call Trace: [ 1370.919056][ T71] [ 1370.919417][ T71] ? __warn (kernel/panic.c:677) [ 1370.919671][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1370.919990][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1370.920265][ T71] ? vprintk_emit (kernel/printk/printk.c:2313) [ 1370.920513][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1370.920754][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1370.921055][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1370.921378][ T71] ? 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) [ 1370.921636][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1370.921964][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 1370.922386][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 1370.922751][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 1370.923079][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 1370.923533][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1370.923817][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 1370.924138][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1370.924433][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1370.924703][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 1370.925035][ T71] process_one_work (kernel/workqueue.c:2638) [ 1370.925322][ T71] ? 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) [ 1370.925591][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1370.925877][ T71] ? assign_work (kernel/workqueue.c:1101) [ 1370.926130][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1370.926384][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1370.926731][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1370.927004][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1370.927308][ T71] kthread (kernel/kthread.c:388) [ 1370.927525][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 1370.927775][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 1370.928008][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 1370.928257][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 1370.931418][ T71] ------------[ cut here ]------------ | [ 1370.931726][ T71] sysfs group 'bridge' not found for kobject 'br1' | [ 1370.932097][ T71] WARNING: CPU: 3 PID: 71 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 1370.932590][ T71] Modules linked in: macvlan vxlan ip6_udp_tunnel udp_tunnel sch_ets act_mirred cls_matchall sch_red sch_tbf ip6_gre ip6_tunnel tunnel6 ip_gre gre act_gact cls_flower dummy sch_ingress bridge stp llc 8021q vrf veth [ 1370.934264][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1370.934952][ T71] Workqueue: netns cleanup_net [ 1370.935284][ T71] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1370.935645][ T71] 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 3c b4 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 3c b4 mov $0xffffffffb43c99a0,%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 [ 1370.936812][ T71] RSP: 0018:ffffc9000051fba0 EFLAGS: 00010282 [ 1370.937168][ T71] RAX: 0000000000000000 RBX: ffffffffc053df00 RCX: ffffffffb190e74f [ 1370.937661][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 1370.938107][ T71] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a3f19 [ 1370.938547][ T71] R10: ffffc9000051f8cf R11: 205d313754202020 R12: ffff88800b37a610 [ 1370.938988][ T71] R13: ffff88800b37add8 R14: ffffc9000051fc98 R15: ffff88800b37aba0 [ 1370.939410][ T71] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 1370.939898][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1370.940264][ T71] CR2: 00007ffeea9c9fc0 CR3: 000000000b1ac006 CR4: 00000000001706f0 [ 1370.940696][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1370.941129][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1370.941563][ T71] Call Trace: [ 1370.941753][ T71] [ 1370.941911][ T71] ? __warn (kernel/panic.c:677) [ 1370.942143][ T71] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 1370.942415][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1370.942696][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 1370.942946][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 1370.943177][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 1370.943431][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1370.943704][ T71] ? 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) [ 1370.943941][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 1370.944214][ T71] br_dev_delete (net/bridge/br_if.c:396) bridge [ 1370.944545][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 1370.944895][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 1370.945129][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 1370.945430][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 1370.945693][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1370.945944][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 1370.946227][ T71] process_one_work (kernel/workqueue.c:2638) [ 1370.946496][ T71] ? 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) [ 1370.946752][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 1370.947033][ T71] ? assign_work (kernel/workqueue.c:1101) [ 1370.947303][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 1370.947571][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1370.947923][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1370.948208][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 1370.948499][ T71] kthread (kernel/kthread.c:388) [ 1370.948727][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 1370.948977][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 1370.949230][ T71] ? __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