syzkaller login: [ 31.067484] BUG: Bad rss-counter state mm:00000000bac0ee42 type:MM_FILEPAGES val:33 [ 31.068494] BUG: Bad rss-counter state mm:00000000bac0ee42 type:MM_ANONPAGES val:22 [ 31.237925] ================================================================== [ 31.238951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.239951] Read of size 8 at addr ffff888019c9b968 by task sshd/221 [ 31.240868] [ 31.241099] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.242017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.243088] Call Trace: [ 31.243438] [ 31.243743] dump_stack_lvl+0x91/0xf0 [ 31.244267] print_report+0xcc/0x620 [ 31.244788] ? __virt_addr_valid+0x102/0x340 [ 31.245375] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.246030] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.246680] kasan_report+0xbe/0xf0 [ 31.247185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247855] vma_interval_tree_remove+0xc75/0xec0 [ 31.248545] vma_prepare+0xc54/0x11a0 [ 31.249061] __split_vma+0x5af/0x950 [ 31.249591] ? __pfx___split_vma+0x10/0x10 [ 31.250162] ? find_held_lock+0x2c/0x110 [ 31.250725] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.251354] ? lock_is_held_type+0x9f/0x120 [ 31.251936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.252591] ? mtree_range_walk+0x632/0x900 [ 31.253182] ? mas_walk+0x5c7/0x7c0 [ 31.253697] do_vmi_munmap+0x1f1/0x2b0 [ 31.254226] mmap_region+0x1f9/0x2660 [ 31.254746] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.255302] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.256067] ? __pfx_lock_acquire+0x10/0x10 [ 31.256631] ? __pfx_mmap_region+0x10/0x10 [ 31.257198] ? security_mmap_addr+0x7d/0xa0 [ 31.257766] ? get_unmapped_area+0x1f5/0x3f0 [ 31.258354] do_mmap+0x854/0xf00 [ 31.258829] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.259366] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.259972] ksys_mmap_pgoff+0x3af/0x500 [ 31.260519] do_syscall_64+0x3f/0x90 [ 31.261036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261738] RIP: 0033:0x7fcb8a25dd82 [ 31.262229] 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 [ 31.264506] RSP: 002b:00007ffc0744bf68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.265470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb8a25dd82 [ 31.266389] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb89697000 [ 31.267308] RBP: 00007fcb89697000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268226] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddee580f70 [ 31.269133] R13: 00007ffc0744bf80 R14: 00007ffc0744bfb0 R15: 00007ffc0744c310 [ 31.270054] [ 31.270367] [ 31.270596] Allocated by task 214: [ 31.271057] kasan_save_stack+0x22/0x50 [ 31.271603] kasan_set_track+0x25/0x30 [ 31.272137] __kasan_slab_alloc+0x59/0x70 [ 31.272695] kmem_cache_alloc+0x16b/0x370 [ 31.273251] vm_area_dup+0x20/0x160 [ 31.273744] __split_vma+0x170/0x950 [ 31.274238] split_vma+0xc6/0x110 [ 31.274707] mprotect_fixup+0x8d2/0xb30 [ 31.275241] do_mprotect_pkey+0x87e/0xd40 [ 31.275819] __x64_sys_mprotect+0x78/0xc0 [ 31.276383] do_syscall_64+0x3f/0x90 [ 31.276889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277574] [ 31.277809] Freed by task 214: [ 31.278233] kasan_save_stack+0x22/0x50 [ 31.278767] kasan_set_track+0x25/0x30 [ 31.279304] kasan_save_free_info+0x2b/0x50 [ 31.279870] __kasan_slab_free+0x10a/0x190 [ 31.280440] kmem_cache_free+0x10d/0x4d0 [ 31.280997] rcu_core+0x8c8/0x2860 [ 31.281467] __do_softirq+0x1b7/0x7d4 [ 31.281984] [ 31.282210] Last potentially related work creation: [ 31.282825] kasan_save_stack+0x22/0x50 [ 31.283369] __kasan_record_aux_stack+0x8e/0xa0 [ 31.283973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.284651] remove_vma+0x139/0x170 [ 31.285131] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.285732] do_vmi_munmap+0x1f1/0x2b0 [ 31.286250] __vm_munmap+0x138/0x3a0 [ 31.286767] __x64_sys_munmap+0x59/0x80 [ 31.287317] do_syscall_64+0x3f/0x90 [ 31.287826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288509] [ 31.288737] The buggy address belongs to the object at ffff888019c9b910 [ 31.288737] which belongs to the cache vm_area_struct of size 168 [ 31.290302] The buggy address is located 88 bytes inside of [ 31.290302] freed 168-byte region [ffff888019c9b910, ffff888019c9b9b8) [ 31.291824] [ 31.292059] The buggy address belongs to the physical page: [ 31.292770] page:0000000004764441 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c9b [ 31.293941] memcg:ffff88800e15fb01 [ 31.294408] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.295100] page_type: 0xffffffff() [ 31.295609] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.296593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e15fb01 [ 31.297557] page dumped because: kasan: bad access detected [ 31.298267] [ 31.298500] Memory state around the buggy address: [ 31.299112] ffff888019c9b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.300035] ffff888019c9b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.301033] >ffff888019c9b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.302012] ^ [ 31.302898] ffff888019c9b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.303896] ffff888019c9ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.304869] ================================================================== [ 31.306125] Disabling lock debugging due to kernel taint [ 33.701553] BUG: Bad rss-counter state mm:00000000845113c2 type:MM_FILEPAGES val:33 [ 33.702757] BUG: Bad rss-counter state mm:00000000845113c2 type:MM_ANONPAGES val:22 [ 34.085747] BUG: Bad rss-counter state mm:000000008e8e8ead type:MM_FILEPAGES val:33 [ 34.086753] BUG: Bad rss-counter state mm:000000008e8e8ead type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39220' (ECDSA) to the list of known hosts. 2023/06/21 02:36:27 fuzzer started 2023/06/21 02:36:28 dialing manager at localhost:36067 2023/06/21 02:36:28 checking machine... 2023/06/21 02:36:28 checking revisions... [ 34.840752] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:36:28 testing simple program... [ 34.910303] cgroup: Unknown subsys name 'net' [ 34.957704] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016973be0 RCX=ffff888016973be0 RDX=00000000000d000d RSI=ffff888016973be0 RDI=ffff88800844f780 RBP=ffff888015897c68 RSP=ffff888015897bd0 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea00005a5cc0 R11=00000000802a000c R12=ffffea00005a5cc0 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fafbbc37900 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=000055989367c318 CR3=000000000ca86000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=abaf07744ef6034500000000000ae988 XMM05=db7cf03018d4dc0100000000001321f8 XMM06=836722d62ad90bdd00000000001312a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8614d9ac RDX=0000000000000001 RSI=dffffc0000000000 RDI=0000000000000001 RBP=ffff88800eb97920 RSP=ffff88800eb97858 R8 =ffffffff8614d9b0 R9 =ffff88800eb97908 R10=0000000000038001 R11=00000000000244c6 R12=ffff88800eb97928 R13=ffff88800eb97910 R14=ffff88800eb97dc0 R15=ffff88800eb978c8 RIP=ffffffff811311b8 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007febbdb3a900 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=00007febbe0ef650 CR3=000000001659c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000