====================================== | [ 445.760341][ T11] ================================================================== | [ 445.760820][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 445.761282][ T11] Read of size 1 at addr ffff8880039a15bc by task kworker/u8:0/11 | [ 445.761729][ T11] [ 445.762317][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 445.762996][ T11] Workqueue: netns cleanup_net [ 445.763276][ T11] Call Trace: [ 445.763459][ T11] [ 445.763641][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 445.763906][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 445.764280][ T11] ? kobject_put (lib/kobject.c:729) [ 445.764539][ T11] print_report (mm/kasan/report.c:489) [ 445.764806][ 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) [ 445.765105][ T11] kasan_report (mm/kasan/report.c:603) [ 445.765348][ T11] ? kobject_put (lib/kobject.c:729) [ 445.765589][ T11] kobject_put (lib/kobject.c:729) [ 445.765831][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 445.766088][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 445.766347][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 445.766633][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 445.766885][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 445.767230][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 445.767548][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 445.767829][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 445.768140][ T11] process_one_work (kernel/workqueue.c:2638) [ 445.768441][ 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) [ 445.768713][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 445.769035][ T11] ? assign_work (kernel/workqueue.c:1101) [ 445.769335][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 445.769624][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 445.769930][ T11] kthread (kernel/kthread.c:388) [ 445.770198][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 445.770477][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 445.770727][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 445.771007][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 445.791460][ T11] ------------[ cut here ]------------ | [ 445.791842][ T11] refcount_t: underflow; use-after-free. | [ 445.792282][ T11] WARNING: CPU: 1 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 445.792809][ T11] Modules linked in: xfrm_user psample macsec fou vxlan ip6_udp_tunnel udp_tunnel ip6_gre ip_gre gre cls_u32 sch_htb [last unloaded: netdevsim] [ 445.794476][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 445.795232][ T11] Workqueue: netns cleanup_net [ 445.795511][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 445.795878][ T11] Code: f9 82 03 80 fb 01 0f 87 ee 02 b1 01 83 e3 01 0f 85 4d ff ff ff c6 05 9a f9 82 03 01 90 48 c7 c7 20 7a e2 9a e8 3e 05 2a ff 90 <0f> 0b 90 90 e9 2f ff ff ff 48 89 df e8 8c 68 a6 ff e9 b6 fe ff ff All code ======== 0: f9 stc 1: 82 (bad) 2: 03 80 fb 01 0f 87 add -0x78f0fe05(%rax),%eax 8: ee out %al,(%dx) 9: 02 b1 01 83 e3 01 add 0x1e38301(%rcx),%dh f: 0f 85 4d ff ff ff jne 0xffffffffffffff62 15: c6 05 9a f9 82 03 01 movb $0x1,0x382f99a(%rip) # 0x382f9b6 1c: 90 nop 1d: 48 c7 c7 20 7a e2 9a mov $0xffffffff9ae27a20,%rdi 24: e8 3e 05 2a ff call 0xffffffffff2a0567 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 8c 68 a6 ff call 0xffffffffffa668c7 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 8c 68 a6 ff call 0xffffffffffa6689d 11: e9 b6 fe ff ff jmp 0xfffffffffffffecc [ 445.797072][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 445.797473][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff9811056f [ 445.797979][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 445.798422][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 445.798908][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff88800921a000 [ 445.799358][ T11] R13: ffff88800921adf8 R14: ffffc900000bfc98 R15: ffff88800921abc0 [ 445.799782][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 445.800303][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 445.800682][ T11] CR2: 0000556f8816c0f0 CR3: 000000001e134004 CR4: 00000000001706f0 [ 445.801132][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 445.801551][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 445.801993][ T11] Call Trace: [ 445.802203][ T11] [ 445.802380][ T11] ? __warn (kernel/panic.c:677) [ 445.802611][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 445.802927][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 445.803246][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 445.803563][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 445.803824][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 445.804109][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 445.804466][ 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) [ 445.804705][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 445.805040][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 445.805381][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 445.805667][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 445.805978][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 445.806304][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 445.806572][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 445.806962][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 445.807256][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 445.807534][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 445.807878][ T11] process_one_work (kernel/workqueue.c:2638) [ 445.808164][ 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) [ 445.808416][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 445.808727][ T11] ? assign_work (kernel/workqueue.c:1101) [ 445.808998][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 445.809320][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 445.809615][ T11] kthread (kernel/kthread.c:388) [ 445.809875][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 445.810169][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 445.810438][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 445.810723][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 445.813985][ T11] ------------[ cut here ]------------ | [ 445.814303][ T11] sysfs group 'bridge' not found for kobject 'test-br0' | [ 445.814723][ T11] WARNING: CPU: 1 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 445.815855][ T11] Modules linked in: xfrm_user psample macsec fou vxlan ip6_udp_tunnel udp_tunnel ip6_gre ip_gre gre cls_u32 sch_htb [last unloaded: netdevsim] [ 445.817415][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 445.818121][ T11] Workqueue: netns cleanup_net [ 445.818381][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 445.818718][ 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 a7 dc 9a e8 60 65 5e ff 90 <0f> 0b 90 90 48 83 c4 08 5b 5d 41 5c c3 cc cc cc cc e8 e9 c7 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 a7 dc 9a mov $0xffffffff9adca7a0,%rdi 24: e8 60 65 5e ff call 0xffffffffff5e6589 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 e9 c7 da ff call 0xffffffffffdac829 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 e9 c7 da ff call 0xffffffffffdac7ff [ 445.819908][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 445.820307][ T11] RAX: 0000000000000000 RBX: ffffffff9b1be220 RCX: ffffffff9811056f [ 445.820783][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 445.821266][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 445.821733][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff88800921a628 [ 445.822212][ T11] R13: ffff88800921adf8 R14: ffffc900000bfc98 R15: ffff88800921abc0 [ 445.822684][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 445.823212][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 445.823599][ T11] CR2: 0000556f8816c0f0 CR3: 000000001e134004 CR4: 00000000001706f0 [ 445.824063][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 445.824537][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 445.825001][ T11] Call Trace: [ 445.825185][ T11] [ 445.825361][ T11] ? __warn (kernel/panic.c:677) [ 445.825587][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 445.825863][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 445.826212][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 445.826474][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 445.826752][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 445.827035][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 445.827357][ 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) [ 445.827611][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 445.827923][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 445.828220][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 445.828512][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 445.828780][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 445.829084][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 445.829346][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 445.829606][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 445.829903][ T11] process_one_work (kernel/workqueue.c:2638) [ 445.830196][ 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) [ 445.830451][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 445.830783][ T11] ? assign_work (kernel/workqueue.c:1101) [ 445.831047][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 445.831343][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 445.831655][ T11] kthread (kernel/kthread.c:388) [ 445.831896][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 445.832183][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 445.832466][ 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