====================================== | [ 356.686718][ T69] ================================================================== | [ 356.687177][ T69] BUG: KASAN: slab-use-after-free in kobject_put (lib/kobject.c:729) | [ 356.687559][ T69] Read of size 1 at addr ffff888002db6cfc by task kworker/u8:1/69 | [ 356.687969][ T69] [ 356.688528][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 356.689164][ T69] Workqueue: netns cleanup_net [ 356.689422][ T69] Call Trace: [ 356.689637][ T69] [ 356.689873][ T69] dump_stack_lvl (lib/dump_stack.c:107) [ 356.690124][ T69] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 356.690504][ T69] ? kobject_put (lib/kobject.c:729) [ 356.690788][ T69] print_report (mm/kasan/report.c:489) [ 356.691020][ T69] ? 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) [ 356.691288][ T69] kasan_report (mm/kasan/report.c:603) [ 356.691518][ T69] ? kobject_put (lib/kobject.c:729) [ 356.691756][ T69] kobject_put (lib/kobject.c:729) [ 356.691978][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 356.692223][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 356.692471][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 356.692752][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 356.692988][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 356.693285][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 356.693547][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 356.693794][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 356.694064][ T69] process_one_work (kernel/workqueue.c:2638) [ 356.694329][ T69] ? 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) [ 356.694571][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 356.694962][ T69] ? assign_work (kernel/workqueue.c:1101) [ 356.695225][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 356.695494][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 356.695860][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 356.696175][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 356.696490][ T69] kthread (kernel/kthread.c:388) [ 356.696711][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 356.696983][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 356.697269][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 356.697540][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 356.718038][ T69] ------------[ cut here ]------------ | [ 356.718396][ T69] refcount_t: underflow; use-after-free. | [ 356.718774][ T69] WARNING: CPU: 3 PID: 69 at lib/refcount.c:28 refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) | [ 356.719350][ T69] Modules linked in: sctp_diag sctp ip6_udp_tunnel udp_tunnel libcrc32c act_mirred cls_u32 sch_ingress ifb [ 356.720592][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 356.721246][ T69] Workqueue: netns cleanup_net [ 356.721501][ T69] RIP: 0010:refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 356.721826][ T69] 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 a5 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 a5 mov $0xffffffffa5e27a20,%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 [ 356.722929][ T69] RSP: 0018:ffffc900004ffb98 EFLAGS: 00010282 [ 356.723253][ T69] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffa311056f [ 356.723707][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 356.724224][ T69] RBP: 0000000000000003 R08: 0000000000000000 R09: fffff5200009ff18 [ 356.724637][ T69] R10: ffffc900004ff8c7 R11: 205d393654202020 R12: ffff8880082f2000 [ 356.725047][ T69] R13: ffff8880082f2df8 R14: ffffc900004ffc98 R15: ffff8880082f2bc0 [ 356.725477][ T69] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 356.725946][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 356.726297][ T69] CR2: 00007f3854c2d30d CR3: 000000002e134002 CR4: 00000000001706f0 [ 356.726742][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 356.727173][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 356.727586][ T69] Call Trace: [ 356.727773][ T69] [ 356.727930][ T69] ? __warn (kernel/panic.c:677) [ 356.728163][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 356.728453][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 356.728692][ T69] ? vprintk_emit (kernel/printk/printk.c:2313) [ 356.728945][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 356.729181][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 356.729429][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 356.729738][ T69] ? 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) [ 356.730047][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 356.730345][ T69] ? refcount_warn_saturate (lib/refcount.c:28 (discriminator 3)) [ 356.730662][ T69] br_sysfs_delbr (net/bridge/br_sysfs_br.c:1086) [ 356.730929][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 356.731192][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 356.731525][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 356.731783][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 356.732108][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 356.732439][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 356.732704][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 356.733018][ T69] process_one_work (kernel/workqueue.c:2638) [ 356.733287][ T69] ? 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) [ 356.733528][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 356.733811][ T69] ? assign_work (kernel/workqueue.c:1101) [ 356.734057][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 356.734309][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 356.734657][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 356.734936][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 356.735296][ T69] kthread (kernel/kthread.c:388) [ 356.735513][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 356.735758][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 356.736004][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 356.736347][ T69] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 356.739630][ T69] ------------[ cut here ]------------ | [ 356.739943][ T69] sysfs group 'bridge' not found for kobject 'br0' | [ 356.740388][ T69] WARNING: CPU: 3 PID: 69 at fs/sysfs/group.c:282 sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) | [ 356.740913][ T69] Modules linked in: sctp_diag sctp ip6_udp_tunnel udp_tunnel libcrc32c act_mirred cls_u32 sch_ingress ifb [ 356.742232][ T69] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 356.742973][ T69] Workqueue: netns cleanup_net [ 356.743354][ T69] RIP: 0010:sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 356.743696][ T69] 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 a5 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 a5 mov $0xffffffffa5dca7a0,%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 [ 356.744765][ T69] RSP: 0018:ffffc900004ffba0 EFLAGS: 00010282 [ 356.745107][ T69] RAX: 0000000000000000 RBX: ffffffffa61be220 RCX: ffffffffa311056f [ 356.745516][ T69] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 [ 356.745924][ T69] RBP: 0000000000000000 R08: 0000000000000000 R09: fffff5200009ff19 [ 356.746360][ T69] R10: ffffc900004ff8cf R11: 205d393654202020 R12: ffff8880082f2628 [ 356.746862][ T69] R13: ffff8880082f2df8 R14: ffffc900004ffc98 R15: ffff8880082f2bc0 [ 356.747339][ T69] FS: 0000000000000000(0000) GS:ffff888035e00000(0000) knlGS:0000000000000000 [ 356.747882][ T69] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 356.748271][ T69] CR2: 00007f3854c2d30d CR3: 000000002e134002 CR4: 00000000001706f0 [ 356.748745][ T69] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 356.749224][ T69] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 356.749709][ T69] Call Trace: [ 356.749911][ T69] [ 356.750076][ T69] ? __warn (kernel/panic.c:677) [ 356.750311][ T69] ? console_trylock (kernel/printk/printk.c:2659 kernel/printk/printk.c:2654) [ 356.750609][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 356.750951][ T69] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 356.751214][ T69] ? handle_bug (arch/x86/kernel/traps.c:238) [ 356.751522][ T69] ? exc_invalid_op (arch/x86/kernel/traps.c:259 (discriminator 1)) [ 356.751789][ T69] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 356.752110][ T69] ? 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) [ 356.752388][ T69] ? sysfs_remove_group (fs/sysfs/group.c:282 (discriminator 1)) [ 356.752689][ T69] br_dev_delete (net/bridge/br_if.c:396) [ 356.752960][ T69] br_net_exit_batch_rtnl (net/bridge/br.c:369) [ 356.753309][ T69] cleanup_net (net/core/net_namespace.c:628 (discriminator 2)) [ 356.753572][ T69] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 356.753883][ T69] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 356.754190][ T69] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 356.754478][ T69] ? process_one_work (kernel/workqueue.c:2609) [ 356.754787][ T69] process_one_work (kernel/workqueue.c:2638) [ 356.755098][ T69] ? 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) [ 356.755398][ T69] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 356.755731][ T69] ? assign_work (kernel/workqueue.c:1101) [ 356.756006][ T69] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 356.756292][ T69] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 356.756683][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 356.756950][ T69] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 356.757224][ T69] kthread (kernel/kthread.c:388) [ 356.757437][ T69] ? __pfx_kthread (kernel/kthread.c:341) [ 356.757680][ T69] ret_from_fork (arch/x86/kernel/process.c:153) [ 356.757916][ T69] ? __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