syzkaller login: [ 31.199913] BUG: Bad rss-counter state mm:0000000037c14f47 type:MM_FILEPAGES val:33 [ 31.201164] BUG: Bad rss-counter state mm:0000000037c14f47 type:MM_ANONPAGES val:22 [ 31.237090] ================================================================== [ 31.238140] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.239239] Read of size 8 at addr ffff8880191c54e0 by task sshd/220 [ 31.240142] [ 31.240433] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.241321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.242432] Call Trace: [ 31.242753] [ 31.243038] dump_stack_lvl+0x91/0xf0 [ 31.243528] print_report+0xcc/0x620 [ 31.244011] ? __virt_addr_valid+0x102/0x340 [ 31.244568] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245795] kasan_report+0xbe/0xf0 [ 31.246278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.246901] vma_interval_tree_remove+0xc75/0xec0 [ 31.247511] vma_prepare+0xc54/0x11a0 [ 31.247995] __split_vma+0x5af/0x950 [ 31.248469] ? __pfx___split_vma+0x10/0x10 [ 31.249013] ? find_held_lock+0x2c/0x110 [ 31.249538] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.250124] ? lock_is_held_type+0x9f/0x120 [ 31.250666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.251271] ? mtree_range_walk+0x632/0x900 [ 31.251813] ? mas_walk+0x5c7/0x7c0 [ 31.252286] do_vmi_munmap+0x1f1/0x2b0 [ 31.252769] mmap_region+0x1f9/0x2660 [ 31.253245] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.253751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.254468] ? __pfx_lock_acquire+0x10/0x10 [ 31.255003] ? __pfx_mmap_region+0x10/0x10 [ 31.255521] ? security_mmap_addr+0x7d/0xa0 [ 31.256053] ? get_unmapped_area+0x1f5/0x3f0 [ 31.256598] do_mmap+0x854/0xf00 [ 31.257041] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.257535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.258100] ksys_mmap_pgoff+0x3af/0x500 [ 31.258608] do_syscall_64+0x3f/0x90 [ 31.259085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.259728] RIP: 0033:0x7f1bf51f3d82 [ 31.260177] 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 [ 31.262305] RSP: 002b:00007ffd5f3b2bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.263216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bf51f3d82 [ 31.264065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bf462d000 [ 31.264901] RBP: 00007f1bf462d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.266013] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f1d0013ec0 [ 31.266852] R13: 00007ffd5f3b2c10 R14: 00007ffd5f3b2c40 R15: 00007ffd5f3b2fa0 [ 31.267713] [ 31.268004] [ 31.268218] Allocated by task 213: [ 31.268646] kasan_save_stack+0x22/0x50 [ 31.269150] kasan_set_track+0x25/0x30 [ 31.269637] __kasan_slab_alloc+0x59/0x70 [ 31.270181] kmem_cache_alloc+0x16b/0x370 [ 31.270700] vm_area_dup+0x20/0x160 [ 31.271155] __split_vma+0x170/0x950 [ 31.271620] split_vma+0xc6/0x110 [ 31.272064] mprotect_fixup+0x8d2/0xb30 [ 31.272560] do_mprotect_pkey+0x87e/0xd40 [ 31.273087] __x64_sys_mprotect+0x78/0xc0 [ 31.273612] do_syscall_64+0x3f/0x90 [ 31.274100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274748] [ 31.274966] Freed by task 213: [ 31.275354] kasan_save_stack+0x22/0x50 [ 31.275855] kasan_set_track+0x25/0x30 [ 31.276350] kasan_save_free_info+0x2b/0x50 [ 31.276881] __kasan_slab_free+0x10a/0x190 [ 31.277416] kmem_cache_free+0x10d/0x4d0 [ 31.277936] rcu_core+0x8c8/0x2860 [ 31.278375] __do_softirq+0x1b7/0x7d4 [ 31.278850] [ 31.279065] Last potentially related work creation: [ 31.279650] kasan_save_stack+0x22/0x50 [ 31.280149] __kasan_record_aux_stack+0x8e/0xa0 [ 31.280720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.281356] remove_vma+0x139/0x170 [ 31.281808] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.282375] do_vmi_munmap+0x1f1/0x2b0 [ 31.282859] __vm_munmap+0x138/0x3a0 [ 31.283324] __x64_sys_munmap+0x59/0x80 [ 31.283814] do_syscall_64+0x3f/0x90 [ 31.284286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.284926] [ 31.285139] The buggy address belongs to the object at ffff8880191c5488 [ 31.285139] which belongs to the cache vm_area_struct of size 168 [ 31.286615] The buggy address is located 88 bytes inside of [ 31.286615] freed 168-byte region [ffff8880191c5488, ffff8880191c5530) [ 31.288039] [ 31.288253] The buggy address belongs to the physical page: [ 31.288915] page:00000000d66541a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x191c5 [ 31.290017] memcg:ffff88800d931001 [ 31.290441] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.291086] page_type: 0xffffffff() [ 31.291539] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.292445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d931001 [ 31.293352] page dumped because: kasan: bad access detected [ 31.294027] [ 31.294240] Memory state around the buggy address: [ 31.294811] ffff8880191c5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.295660] ffff8880191c5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.296508] >ffff8880191c5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297359] ^ [ 31.298129] ffff8880191c5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.298979] ffff8880191c5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.299829] ================================================================== [ 31.300829] Disabling lock debugging due to kernel taint [ 33.743074] BUG: Bad rss-counter state mm:00000000ac4d9aec type:MM_FILEPAGES val:33 [ 33.744179] BUG: Bad rss-counter state mm:00000000ac4d9aec type:MM_ANONPAGES val:22 [ 34.299172] BUG: Bad rss-counter state mm:00000000074c95c5 type:MM_FILEPAGES val:33 [ 34.300300] BUG: Bad rss-counter state mm:00000000074c95c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13541' (ECDSA) to the list of known hosts. 2023/06/20 19:58:55 fuzzer started 2023/06/20 19:58:56 dialing manager at localhost:36067 2023/06/20 19:58:56 checking machine... 2023/06/20 19:58:56 checking revisions... [ 35.026983] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:58:56 testing simple program... [ 35.082769] cgroup: Unknown subsys name 'net' [ 35.121833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:55 Registers: info registers vcpu 0 RAX=ffff888018004080 RBX=ffff88806ce09ee8 RCX=1ffff11003000810 RDX=ffff88800e61aa00 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=0000000000000005 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff888018004540 RIP=ffffffff8137fcd9 RFL=00000246 [---Z-P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f47ee5ef900 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=00007fff10499d1c CR3=000000000d296000 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=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff88800d8b31c0 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff810acf57 RDI=ffff88800d8b3240 RBP=ffff88800d8b31d0 RSP=ffff888008e07ca8 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000007 R13=0000000000000000 R14=ffff88800d8b3200 R15=0000000000000001 RIP=ffffffff810acf65 RFL=00000012 [----A--] 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 00007fbe1e250900 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=00007fbe1d6dfc80 CR3=000000000c55c000 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=04c3f7b8585dd48bb04c4213c5ab4098 XMM02=000000000011a088ec2efd57dc4c00df XMM03=00000000001218f8fcc49f1992e0132a XMM04=63b0f38890c8989d00000000000ae988 XMM05=59d5b690e0af863b00000000001317d8 XMM06=00c3ffa147b8d8570000000000131660 XMM07=e042d86d42eb936e0000000000121b78 XMM08=fcc49f1992e0132a000000000011a0e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000