====================================== | [ 276.750729][ T11] ================================================================== | [ 276.751196][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 276.751586][ T11] Read of size 1 at addr ffff88800540a43c by task kworker/u8:0/11 | [ 276.752002][ T11] [ 276.752554][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 276.753207][ T11] Workqueue: netns cleanup_net [ 276.753472][ T11] Call Trace: [ 276.753651][ T11] [ 276.753813][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 276.754061][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 276.754418][ T11] ? kobject_put (lib/kobject.c:729) [ 276.754660][ T11] print_report (mm/kasan/report.c:489) [ 276.754898][ 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) [ 276.755170][ T11] kasan_report (mm/kasan/report.c:603) [ 276.755407][ T11] ? kobject_put (lib/kobject.c:729) [ 276.755651][ T11] kobject_put (lib/kobject.c:729) [ 276.755889][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 276.756262][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 276.756588][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 276.756946][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 276.757188][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 276.757488][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 276.757756][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 276.758006][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 276.758282][ T11] process_one_work (kernel/workqueue.c:2638) [ 276.758552][ 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) [ 276.758795][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 276.759083][ T11] ? assign_work (kernel/workqueue.c:1101) [ 276.759333][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 276.759589][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 276.759864][ T11] kthread (kernel/kthread.c:388) [ 276.760081][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 276.760330][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 276.760569][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 276.760818][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 276.780225][ T11] ------------[ cut here ]------------ | [ 276.780517][ T11] refcount_t: underflow; use-after-free. | [ 276.780912][ T11] WARNING: CPU: 0 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 276.781471][ T11] Modules linked in: macvlan 8021q vxlan ip6_udp_tunnel udp_tunnel dummy act_mirred cls_flower bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth [ 276.783072][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 276.783776][ T11] Workqueue: netns cleanup_net [ 276.784098][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 276.784477][ 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 88 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 88 loop 0xffffffffffffffac 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 [ 276.785562][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 276.785896][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8630e74f [ 276.786371][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 276.786836][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 276.787304][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800a8fa000 [ 276.787753][ T11] R13: ffff88800a8fadd8 R14: ffffc900000bfc98 R15: ffff88800a8faba0 [ 276.788228][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 276.788746][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 276.789164][ T11] CR2: 0000562d68f97ad8 CR3: 000000001bf1e002 CR4: 00000000001706f0 [ 276.789628][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 276.790092][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 276.790556][ T11] Call Trace: [ 276.790735][ T11] [ 276.790893][ T11] ? __warn (kernel/panic.c:677) [ 276.791122][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 276.791471][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 276.791760][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 276.792067][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 276.792334][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 276.792629][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 276.792955][ 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) [ 276.793270][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 276.793599][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 276.793935][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) bridge [ 276.794328][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 276.794653][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 276.795070][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 276.795364][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 276.795716][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 276.795994][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 276.796252][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 276.796530][ T11] process_one_work (kernel/workqueue.c:2638) [ 276.796795][ 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) [ 276.797048][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 276.797340][ T11] ? assign_work (kernel/workqueue.c:1101) [ 276.797592][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 276.797882][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 276.798215][ T11] kthread (kernel/kthread.c:388) [ 276.798483][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 276.798799][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 276.799085][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 276.799378][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 276.802795][ T11] ------------[ cut here ]------------ | [ 276.803132][ T11] sysfs group 'bridge' not found for kobject 'br1' | [ 276.803564][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 276.804087][ T11] Modules linked in: macvlan 8021q vxlan ip6_udp_tunnel udp_tunnel dummy act_mirred cls_flower bridge stp llc ip6_gre ip6_tunnel tunnel6 act_gact cls_matchall ip_gre gre sch_ingress vrf veth [ 276.805693][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 276.806354][ T11] Workqueue: netns cleanup_net [ 276.806664][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 276.807028][ 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 88 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 88 mov $0xffffffff88dc99a0,%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 [ 276.808093][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 276.808445][ T11] RAX: 0000000000000000 RBX: ffffffffc03c6f00 RCX: ffffffff8630e74f [ 276.808920][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 276.809390][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 276.809870][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800a8fa610 [ 276.810337][ T11] R13: ffff88800a8fadd8 R14: ffffc900000bfc98 R15: ffff88800a8faba0 [ 276.810802][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 276.811325][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 276.811678][ T11] CR2: 0000562d68f97ad8 CR3: 000000001bf1e002 CR4: 00000000001706f0 [ 276.812153][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 276.812622][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 276.813092][ T11] Call Trace: [ 276.813296][ T11] [ 276.813457][ T11] ? __warn (kernel/panic.c:677) [ 276.813723][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 276.814036][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 276.814383][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 276.814627][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 276.814894][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 276.815195][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 276.815524][ 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) [ 276.815770][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 276.816054][ T11] br_dev_delete (net/bridge/br_if.c:396) bridge [ 276.816429][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) bridge [ 276.816836][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 276.817128][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 276.817466][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 276.817780][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 276.818083][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 276.818435][ T11] process_one_work (kernel/workqueue.c:2638) [ 276.818703][ 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) [ 276.818983][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 276.819317][ T11] ? assign_work (kernel/workqueue.c:1101) [ 276.819617][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 276.819872][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 276.820229][ T11] kthread (kernel/kthread.c:388) [ 276.820449][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 276.820698][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 276.820933][ 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