syzkaller login: [ 31.069587] BUG: Bad rss-counter state mm:000000004402667b type:MM_FILEPAGES val:33 [ 31.070841] BUG: Bad rss-counter state mm:000000004402667b type:MM_ANONPAGES val:22 [ 31.216101] ================================================================== [ 31.217200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.218514] Read of size 8 at addr ffff8880094e3ed8 by task sshd/220 [ 31.219413] [ 31.219672] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.220740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.221900] Call Trace: [ 31.222286] [ 31.222625] dump_stack_lvl+0x91/0xf0 [ 31.223205] print_report+0xcc/0x620 [ 31.223781] ? __virt_addr_valid+0x102/0x340 [ 31.224470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225813] kasan_report+0xbe/0xf0 [ 31.226295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226916] vma_interval_tree_remove+0xc75/0xec0 [ 31.227531] vma_prepare+0xc54/0x11a0 [ 31.228003] __split_vma+0x5af/0x950 [ 31.228493] ? __pfx___split_vma+0x10/0x10 [ 31.229022] ? find_held_lock+0x2c/0x110 [ 31.229557] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.230165] ? lock_is_held_type+0x9f/0x120 [ 31.230738] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.231357] ? mtree_range_walk+0x632/0x900 [ 31.231954] ? mas_walk+0x5c7/0x7c0 [ 31.232466] do_vmi_munmap+0x1f1/0x2b0 [ 31.232974] mmap_region+0x1f9/0x2660 [ 31.233459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.233979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.234704] ? __pfx_lock_acquire+0x10/0x10 [ 31.235247] ? __pfx_mmap_region+0x10/0x10 [ 31.235787] ? security_mmap_addr+0x7d/0xa0 [ 31.236340] ? get_unmapped_area+0x1f5/0x3f0 [ 31.236905] do_mmap+0x854/0xf00 [ 31.237350] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.237856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.238427] ksys_mmap_pgoff+0x3af/0x500 [ 31.238946] do_syscall_64+0x3f/0x90 [ 31.239459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240140] RIP: 0033:0x7fb415ffdd82 [ 31.240651] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.242942] RSP: 002b:00007ffd6c1dbb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.243917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb415ffdd82 [ 31.244838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb415437000 [ 31.245748] RBP: 00007fb415437000 R08: 0000000000000009 R09: 0000000000001000 [ 31.246662] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a32547ec0 [ 31.247576] R13: 00007ffd6c1dbbb0 R14: 00007ffd6c1dbbe0 R15: 00007ffd6c1dbf40 [ 31.248512] [ 31.248829] [ 31.249055] Allocated by task 213: [ 31.249512] kasan_save_stack+0x22/0x50 [ 31.250051] kasan_set_track+0x25/0x30 [ 31.250581] __kasan_slab_alloc+0x59/0x70 [ 31.251136] kmem_cache_alloc+0x16b/0x370 [ 31.251690] vm_area_dup+0x20/0x160 [ 31.252173] __split_vma+0x170/0x950 [ 31.252684] split_vma+0xc6/0x110 [ 31.253149] mprotect_fixup+0x8d2/0xb30 [ 31.253683] do_mprotect_pkey+0x87e/0xd40 [ 31.254232] __x64_sys_mprotect+0x78/0xc0 [ 31.254791] do_syscall_64+0x3f/0x90 [ 31.255298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255988] [ 31.256214] Freed by task 213: [ 31.256652] kasan_save_stack+0x22/0x50 [ 31.257191] kasan_set_track+0x25/0x30 [ 31.257718] kasan_save_free_info+0x2b/0x50 [ 31.258289] __kasan_slab_free+0x10a/0x190 [ 31.258948] kmem_cache_free+0x10d/0x4d0 [ 31.259507] rcu_core+0x8c8/0x2860 [ 31.259983] __do_softirq+0x1b7/0x7d4 [ 31.260511] [ 31.260738] Last potentially related work creation: [ 31.261361] kasan_save_stack+0x22/0x50 [ 31.261897] __kasan_record_aux_stack+0x8e/0xa0 [ 31.262511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.263193] remove_vma+0x139/0x170 [ 31.263676] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.264292] do_vmi_munmap+0x1f1/0x2b0 [ 31.264809] __vm_munmap+0x138/0x3a0 [ 31.265303] __x64_sys_munmap+0x59/0x80 [ 31.265834] do_syscall_64+0x3f/0x90 [ 31.266335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267017] [ 31.267245] Second to last potentially related work creation: [ 31.267979] kasan_save_stack+0x22/0x50 [ 31.268534] __kasan_record_aux_stack+0x8e/0xa0 [ 31.269133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.269819] remove_vma+0x139/0x170 [ 31.270290] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.270874] do_vmi_munmap+0x1f1/0x2b0 [ 31.271396] mmap_region+0x1f9/0x2660 [ 31.271908] do_mmap+0x854/0xf00 [ 31.272377] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272900] ksys_mmap_pgoff+0x3af/0x500 [ 31.273437] do_syscall_64+0x3f/0x90 [ 31.273945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274638] [ 31.274864] The buggy address belongs to the object at ffff8880094e3e80 [ 31.274864] which belongs to the cache vm_area_struct of size 168 [ 31.276455] The buggy address is located 88 bytes inside of [ 31.276455] freed 168-byte region [ffff8880094e3e80, ffff8880094e3f28) [ 31.277955] [ 31.278178] The buggy address belongs to the physical page: [ 31.278894] page:00000000b3d0404d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94e3 [ 31.280065] memcg:ffff888014524a01 [ 31.280533] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.281228] page_type: 0xffffffff() [ 31.281713] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.282684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014524a01 [ 31.283639] page dumped because: kasan: bad access detected [ 31.284349] [ 31.284580] Memory state around the buggy address: [ 31.285206] ffff8880094e3d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.286131] ffff8880094e3e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.287045] >ffff8880094e3e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.287957] ^ [ 31.288729] ffff8880094e3f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.289590] ffff8880094e3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.290455] ================================================================== [ 31.291468] Disabling lock debugging due to kernel taint [ 33.638647] BUG: Bad rss-counter state mm:000000002ad24e48 type:MM_FILEPAGES val:33 [ 33.639653] BUG: Bad rss-counter state mm:000000002ad24e48 type:MM_ANONPAGES val:22 [ 34.148537] BUG: Bad rss-counter state mm:00000000540777dc type:MM_FILEPAGES val:33 [ 34.149765] BUG: Bad rss-counter state mm:00000000540777dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41810' (ECDSA) to the list of known hosts. 2023/06/20 18:07:36 fuzzer started 2023/06/20 18:07:36 dialing manager at localhost:36067 2023/06/20 18:07:36 checking machine... 2023/06/20 18:07:36 checking revisions... [ 34.900150] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:07:37 testing simple program... [ 34.952372] cgroup: Unknown subsys name 'net' [ 35.013076] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:07:36 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86138e90 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09dc8 R15=ffff88806ce09a78 RIP=ffffffff81130bc6 RFL=00000297 [--S-APC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4cea385700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f549a69d618 CR3=00000000147ac000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=37303a3831203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036333a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363936 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ac2cf3 RBX=ffffffff85616780 RCX=ffffffff81362d9b RDX=ffffffff85d3e490 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff85616798 RSP=ffff88806cf09de8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff888008c04400 R12=ffffffff85616740 R13=ffff88806cf35000 R14=0000000000006c0d R15=dffffc0000000000 RIP=ffffffff8136316c RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff7f31fba10 CR3=0000000013a76000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=dec9f03fed7613a01240c19c05f1ca63 XMM02=000000000011d820ec2efd57dc4c00df XMM03=0000000000121fc0f8a8a5df724d7ba9 XMM04=086f5fe16832652500000000000ae988 XMM05=3cb17a9261408d0c0000000000133680 XMM06=4fda316b135da52b0000000000133078 XMM07=e042d86d42eb936e0000000000122240 XMM08=f8a8a5df724d7ba9000000000011d880 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000