====================================== | [ 327.521838][ T1976] ================================================================== | [ 327.522173][ T1976] BUG: KASAN: global-out-of-bounds in snmp6_seq_show_item64.constprop.0 (net/ipv6/proc.c:211) | [ 327.522501][ T1976] Read of size 8 at addr ffffffffb1aed870 by task nstat/1976 | [ 327.522763][ T1976] [ 327.522867][ T1976] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 327.522871][ T1976] Call Trace: [ 327.522875][ T1976] [ 327.522877][ T1976] dump_stack_lvl (lib/dump_stack.c:123) [ 327.522891][ T1976] print_address_description.constprop.0 (mm/kasan/report.c:379) [ 327.522909][ T1976] ? snmp6_seq_show_item64.constprop.0 (net/ipv6/proc.c:211) [ 327.522913][ T1976] print_report (mm/kasan/report.c:483) [ 327.522917][ T1976] ? snmp6_seq_show_item64.constprop.0 (net/ipv6/proc.c:211) [ 327.522920][ T1976] ? kasan_addr_to_slab (./include/linux/mm.h:1180 mm/kasan/../slab.h:187 mm/kasan/common.c:38) [ 327.522924][ T1976] ? snmp6_seq_show_item64.constprop.0 (net/ipv6/proc.c:211) [ 327.522927][ T1976] kasan_report (mm/kasan/report.c:597) [ 327.522931][ T1976] ? snmp6_seq_show_item64.constprop.0 (net/ipv6/proc.c:211) [ 327.522937][ T1976] snmp6_seq_show_item64.constprop.0 (net/ipv6/proc.c:211) [ 327.522942][ T1976] ? sockstat6_seq_show (net/ipv6/proc.c:202) [ 327.522954][ T1976] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:751) [ 327.522964][ T1976] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 21)) [ 327.522970][ T1976] ? __kvmalloc_node_noprof (mm/slub.c:5055) [ 327.522976][ T1976] snmp6_seq_show (net/ipv6/proc.c:224) [ 327.522979][ T1976] seq_read_iter (fs/seq_file.c:231) [ 327.522994][ T1976] seq_read (fs/seq_file.c:163) [ 327.522998][ T1976] ? seq_read_iter (fs/seq_file.c:152) [ 327.523002][ T1976] ? __might_fault (mm/memory.c:6958 mm/memory.c:6952) [ 327.523012][ T1976] ? __do_cpuid_func (arch/x86/kvm/cpuid.c:1464) [ 327.523026][ T1976] ? __might_fault (mm/memory.c:6958 mm/memory.c:6952) [ 327.523031][ T1976] ? cp_new_stat (fs/stat.c:471) [ 327.523037][ T1976] ? inode_set_bytes (fs/stat.c:471) [ 327.523042][ T1976] proc_reg_read (fs/proc/inode.c:308 fs/proc/inode.c:320) [ 327.523056][ T1976] vfs_read (fs/read_write.c:570) [ 327.523062][ T1976] ? vfs_getattr_nosec (fs/stat.c:218) [ 327.523066][ T1976] ? kernel_read (fs/read_write.c:553) [ 327.523070][ T1976] ? vfs_fstat (./include/linux/file.h:62 ./include/linux/file.h:84 fs/stat.c:278) [ 327.523073][ T1976] ? __do_sys_newfstat (fs/stat.c:551) [ 327.523077][ T1976] ? __do_sys_fstat (fs/stat.c:551) [ 327.523084][ T1976] ksys_read (fs/read_write.c:715) [ 327.523087][ T1976] ? vfs_write (fs/read_write.c:705) [ 327.523094][ T1976] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) [ 327.523100][ T1976] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 327.523108][ T1976] RIP: 0033:0x7fe7ce463292 [ 327.523112][ T1976] Code: c0 e9 b2 fe ff ff 50 48 8d 3d 6a 15 0c 00 e8 65 e1 01 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24 All code ======== 0: c0 e9 b2 shr $0xb2,%cl 3: fe (bad) 4: ff (bad) 5: ff 50 48 call *0x48(%rax) 8: 8d 3d 6a 15 0c 00 lea 0xc156a(%rip),%edi # 0xc1578 e: e8 65 e1 01 00 call 0x1e178 13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 18: f3 0f 1e fa endbr64 1c: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 23: 00 24: 85 c0 test %eax,%eax 26: 75 10 jne 0x38 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 56 ja 0x88 32: c3 ret 33: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 38: 48 83 ec 28 sub $0x28,%rsp 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 54 push %rsp 3f: 24 .byte 0x24 Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 56 ja 0x5e 8: c3 ret 9: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) e: 48 83 ec 28 sub $0x28,%rsp 12: 48 rex.W 13: 89 .byte 0x89 14: 54 push %rsp 15: 24 .byte 0x24 [ 327.523114][ T1976] RSP: 002b:00007ffdab13cc58 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 327.523122][ T1976] RAX: ffffffffffffffda RBX: 0000000024ab8910 RCX: 00007fe7ce463292 [ 327.523124][ T1976] RDX: 0000000000000400 RSI: 0000000024ab8500 RDI: 0000000000000006 [ 327.523126][ T1976] RBP: 00007fe7ce55b5c0 R08: 0000000000000006 R09: 0000000000000000 [ 327.523128][ T1976] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000024ab8910 Finger prints: print_report:kasan_report:snmp6_seq_show:seq_read_iter:seq_read