====================================== | [ 2285.937622][ T11] ================================================================== | [ 2285.938066][ T11] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 2285.938515][ T11] Read of size 1 at addr ffff8880051a6bbc by task kworker/u8:0/11 | [ 2285.938923][ T11] [ 2285.939476][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 2285.940114][ T11] Workqueue: netns cleanup_net [ 2285.940374][ T11] Call Trace: [ 2285.940554][ T11] [ 2285.940712][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 2285.940963][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 2285.941319][ T11] ? kobject_put (lib/kobject.c:729) [ 2285.941557][ T11] print_report (mm/kasan/report.c:489) [ 2285.941791][ 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) [ 2285.942063][ T11] kasan_report (mm/kasan/report.c:603) [ 2285.942294][ T11] ? kobject_put (lib/kobject.c:729) [ 2285.942535][ T11] kobject_put (lib/kobject.c:729) [ 2285.942781][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 2285.943027][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 2285.943346][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 2285.943674][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 2285.943915][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 2285.944243][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 2285.944536][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 2285.944802][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 2285.945081][ T11] process_one_work (kernel/workqueue.c:2638) [ 2285.945371][ 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) [ 2285.945638][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 2285.945955][ T11] ? assign_work (kernel/workqueue.c:1101) [ 2285.946224][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 2285.946500][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 2285.946793][ T11] kthread (kernel/kthread.c:388) [ 2285.947036][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 2285.947304][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 2285.947580][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 2285.947850][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 2285.968170][ T11] ------------[ cut here ]------------ | [ 2285.968480][ T11] refcount_t: underflow; use-after-free. | [ 2285.968834][ T11] WARNING: CPU: 1 PID: 11 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 2285.969943][ T11] Modules linked in: xfrm_user psample macsec fou ip6_gre ip_gre gre cls_u32 sch_htb xt_mark sch_ingress act_mirred cls_basic sch_fq_codel nft_compat nf_tables libcrc32c vxlan ip6_udp_tunnel udp_tunnel mpls_iptunnel mpls_router [last unloaded: netdevsim] [ 2285.972198][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 2285.973096][ T11] Workqueue: netns cleanup_net [ 2285.973374][ T11] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 2285.973751][ 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 62 b7 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 62 b7 mov $0xffffffffb7627a20,%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 [ 2285.974876][ T11] RSP: 0018:ffffc900000bfb98 EFLAGS: 00010282 [ 2285.975278][ T11] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffb491056f [ 2285.975756][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 2285.976268][ T11] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff52000017f18 [ 2285.976686][ T11] R10: ffffc900000bf8c7 R11: 205d313154202020 R12: ffff8880059fa000 [ 2285.977149][ T11] R13: ffff8880059fadf8 R14: ffffc900000bfc98 R15: ffff8880059fabc0 [ 2285.977570][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 2285.978133][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2285.978533][ T11] CR2: 00007fff0141cff8 CR3: 0000000006d4a001 CR4: 00000000001706f0 [ 2285.979001][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 2285.979424][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 2285.979843][ T11] Call Trace: [ 2285.980115][ T11] [ 2285.980273][ T11] ? __warn (kernel/panic.c:677) [ 2285.980545][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 2285.980873][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 2285.981197][ T11] ? vprintk_emit (kernel/printk/printk.c:2313) [ 2285.981474][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 2285.981722][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 2285.982051][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 2285.982323][ 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) [ 2285.982562][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 2285.982852][ T11] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 2285.983197][ T11] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 2285.983438][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 2285.983683][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 2285.984054][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 2285.984293][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 2285.984588][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 2285.984854][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 2285.985151][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 2285.985424][ T11] process_one_work (kernel/workqueue.c:2638) [ 2285.985690][ 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) [ 2285.985979][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 2285.986264][ T11] ? assign_work (kernel/workqueue.c:1101) [ 2285.986507][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 2285.986760][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 2285.987077][ T11] kthread (kernel/kthread.c:388) [ 2285.987296][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 2285.987543][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 2285.987777][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 2285.988074][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 2285.991310][ T11] ------------[ cut here ]------------ | [ 2285.991652][ T11] sysfs group 'bridge' not found for kobject 'test-br0' | [ 2285.992121][ T11] WARNING: CPU: 0 PID: 11 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 2285.992610][ T11] Modules linked in: xfrm_user psample macsec fou ip6_gre ip_gre gre cls_u32 sch_htb xt_mark sch_ingress act_mirred cls_basic sch_fq_codel nft_compat nf_tables libcrc32c vxlan ip6_udp_tunnel udp_tunnel mpls_iptunnel mpls_router [last unloaded: netdevsim] [ 2285.994474][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 2285.995183][ T11] Workqueue: netns cleanup_net [ 2285.995475][ T11] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 2285.995807][ 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 5c b7 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 5c b7 mov $0xffffffffb75ca7a0,%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 [ 2285.996860][ T11] RSP: 0018:ffffc900000bfba0 EFLAGS: 00010282 [ 2285.997244][ T11] RAX: 0000000000000000 RBX: ffffffffb79be220 RCX: ffffffffb491056f [ 2285.997695][ T11] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 2285.998143][ T11] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff52000017f19 [ 2285.998557][ T11] R10: ffffc900000bf8cf R11: 205d313154202020 R12: ffff8880059fa628 [ 2285.998976][ T11] R13: ffff8880059fadf8 R14: ffffc900000bfc98 R15: ffff8880059fabc0 [ 2285.999392][ T11] FS: 0000000000000000(0000) GS:ffff888035200000(0000) knlGS:0000000000000000 [ 2285.999860][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 2286.000212][ T11] CR2: 0000561aaba2ddec CR3: 0000000016764006 CR4: 00000000001706f0 [ 2286.000691][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 2286.001169][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 2286.001622][ T11] Call Trace: [ 2286.001806][ T11] [ 2286.002010][ T11] ? __warn (kernel/panic.c:677) [ 2286.002247][ T11] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 2286.002503][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 2286.002811][ T11] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 2286.003100][ T11] ? handle_bug (arch/x86/kernel/traps.c:238) [ 2286.003357][ T11] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 2286.003628][ T11] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 2286.003940][ 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) [ 2286.004216][ T11] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 2286.004528][ T11] br_dev_delete (net/bridge/br_if.c:396) [ 2286.004791][ T11] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 2286.005109][ T11] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 2286.005382][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 2286.005713][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 2286.006002][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 2286.006285][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 2286.006599][ T11] process_one_work (kernel/workqueue.c:2638) [ 2286.006897][ 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) [ 2286.007164][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 2286.007451][ T11] ? assign_work (kernel/workqueue.c:1101) [ 2286.007696][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 2286.007954][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 2286.008228][ T11] kthread (kernel/kthread.c:388) [ 2286.008443][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 2286.008689][ T11] ret_from_fork (arch/x86/kernel/process.c:153) [ 2286.008932][ 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