====================================== | [ 103.754179][ T71] ================================================================== | [ 103.754642][ T71] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 103.755032][ T71] Read of size 1 at addr ffff88800311ccfc by task kworker/u8:1/71 | [ 103.755455][ T71] [ 103.756040][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 103.756756][ T71] Workqueue: netns cleanup_net [ 103.757032][ T71] Call Trace: [ 103.757256][ T71] [ 103.757424][ T71] dump_stack_lvl (lib/dump_stack.c:107) [ 103.757672][ T71] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 103.758057][ T71] ? kobject_put (lib/kobject.c:729) [ 103.758327][ T71] print_report (mm/kasan/report.c:489) [ 103.758572][ 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) [ 103.758871][ T71] kasan_report (mm/kasan/report.c:603) [ 103.759102][ T71] ? kobject_put (lib/kobject.c:729) [ 103.759381][ T71] kobject_put (lib/kobject.c:729) [ 103.759636][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 103.759901][ T71] br_dev_delete (net/bridge/br_if.c:396) [ 103.760159][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 103.760572][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 103.760836][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 103.761143][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 103.761428][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 103.761704][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 103.762002][ T71] process_one_work (kernel/workqueue.c:2638) [ 103.762273][ 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) [ 103.762539][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 103.762854][ T71] ? assign_work (kernel/workqueue.c:1101) [ 103.763121][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 103.763375][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 103.763729][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 103.764003][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 103.764272][ T71] kthread (kernel/kthread.c:388) [ 103.764488][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 103.764730][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 103.764971][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 103.765218][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 103.785333][ T71] ------------[ cut here ]------------ | [ 103.785644][ T71] refcount_t: underflow; use-after-free. | [ 103.785996][ T71] WARNING: CPU: 3 PID: 71 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 103.786576][ T71] Modules linked in: xt_HL nft_compat nf_tables libcrc32c amt udp_tunnel xfrm_interface sha1_generic xfrm_user [ 103.787771][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 103.788485][ T71] Workqueue: netns cleanup_net [ 103.788751][ T71] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 103.789140][ T71] 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 82 8e 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 82 8e mov $0xffffffff8e827a20,%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 [ 103.790286][ T71] RSP: 0018:ffffc9000051fb98 EFLAGS: 00010282 [ 103.790635][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8bb1056f [ 103.791109][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 103.791564][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff520000a3f18 [ 103.792042][ T71] R10: ffffc9000051f8c7 R11: 205d313754202020 R12: ffff88800a322000 [ 103.792490][ T71] R13: ffff88800a322df8 R14: ffffc9000051fc98 R15: ffff88800a322bc0 [ 103.793054][ T71] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 103.793537][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.793921][ T71] CR2: 00005568b6beedec CR3: 000000002eb34006 CR4: 00000000001706f0 [ 103.794348][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.794765][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.795188][ T71] Call Trace: [ 103.795365][ T71] [ 103.795527][ T71] ? __warn (kernel/panic.c:677) [ 103.795786][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 103.796124][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 103.796418][ T71] ? vprintk_emit (kernel/printk/printk.c:2313) [ 103.796687][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 103.796955][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 103.797230][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 103.797543][ 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) [ 103.797793][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 103.798151][ T71] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 103.798609][ T71] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 103.799018][ T71] br_dev_delete (net/bridge/br_if.c:396) [ 103.799421][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 103.799867][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 103.800200][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 103.800663][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 103.801069][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 103.801451][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 103.801880][ T71] process_one_work (kernel/workqueue.c:2638) [ 103.802327][ 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) [ 103.802732][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 103.803210][ T71] ? assign_work (kernel/workqueue.c:1101) [ 103.803589][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 103.803970][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 103.804478][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 103.804913][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 103.805327][ T71] kthread (kernel/kthread.c:388) [ 103.805643][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 103.806035][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 103.806390][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 103.806756][ T71] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 103.811244][ T71] ------------[ cut here ]------------ | [ 103.811768][ T71] sysfs group 'bridge' not found for kobject 'br0' | [ 103.812567][ T71] WARNING: CPU: 2 PID: 71 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 103.813325][ T71] Modules linked in: xt_HL nft_compat nf_tables libcrc32c amt udp_tunnel xfrm_interface sha1_generic xfrm_user [ 103.815086][ T71] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 103.816091][ T71] Workqueue: netns cleanup_net [ 103.816492][ T71] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 103.816975][ 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 a7 7c 8e 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 7c 8e mov $0xffffffff8e7ca7a0,%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 [ 103.818554][ T71] RSP: 0018:ffffc9000051fba0 EFLAGS: 00010282 [ 103.819051][ T71] RAX: 0000000000000000 RBX: ffffffff8ebbe220 RCX: ffffffff8bb1056f [ 103.819705][ T71] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 103.820353][ T71] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff520000a3f19 [ 103.821078][ T71] R10: ffffc9000051f8cf R11: 205d313754202020 R12: ffff88800a322628 [ 103.821760][ T71] R13: ffff88800a322df8 R14: ffffc9000051fc98 R15: ffff88800a322bc0 [ 103.822445][ T71] FS: 0000000000000000(0000) GS:ffff888035a00000(0000) knlGS:0000000000000000 [ 103.823149][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.823674][ T71] CR2: 00007f54ee673000 CR3: 000000002eb34002 CR4: 00000000001706f0 [ 103.824309][ T71] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.824932][ T71] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.825558][ T71] Call Trace: [ 103.825846][ T71] [ 103.826094][ T71] ? __warn (kernel/panic.c:677) [ 103.826453][ T71] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 103.826887][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 103.827321][ T71] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 103.827696][ T71] ? handle_bug (arch/x86/kernel/traps.c:238) [ 103.828051][ T71] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 103.828424][ T71] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 103.828828][ 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) [ 103.829194][ T71] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 103.829640][ T71] br_dev_delete (net/bridge/br_if.c:396) [ 103.830066][ T71] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 103.830507][ T71] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 103.830875][ T71] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 103.831351][ T71] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 103.831771][ T71] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 103.832187][ T71] ? process_one_work (kernel/workqueue.c:2609) [ 103.832613][ T71] process_one_work (kernel/workqueue.c:2638) [ 103.833052][ 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) [ 103.833455][ T71] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 103.833908][ T71] ? assign_work (kernel/workqueue.c:1101) [ 103.834304][ T71] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 103.834682][ T71] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 103.835215][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 103.835625][ T71] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 103.836043][ T71] kthread (kernel/kthread.c:388) [ 103.836368][ T71] ? __pfx_kthread (kernel/kthread.c:341) [ 103.836743][ T71] ret_from_fork (arch/x86/kernel/process.c:153) [ 103.837109][ 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