syzkaller login: [ 33.012595] BUG: Bad rss-counter state mm:00000000f634e3d1 type:MM_FILEPAGES val:33 [ 33.013618] BUG: Bad rss-counter state mm:00000000f634e3d1 type:MM_ANONPAGES val:22 [ 33.179489] ================================================================== [ 33.180650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.181813] Read of size 8 at addr ffff888016ff6c20 by task sshd/218 [ 33.182858] [ 33.183149] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.184304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.185631] Call Trace: [ 33.186069] [ 33.186455] dump_stack_lvl+0x91/0xf0 [ 33.187134] print_report+0xcc/0x620 [ 33.187801] ? __virt_addr_valid+0x102/0x340 [ 33.188582] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.189420] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.190272] kasan_report+0xbe/0xf0 [ 33.190930] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.191783] vma_interval_tree_remove+0xc75/0xec0 [ 33.192614] vma_prepare+0xc54/0x11a0 [ 33.193269] __split_vma+0x5af/0x950 [ 33.193917] ? __pfx___split_vma+0x10/0x10 [ 33.194670] ? find_held_lock+0x2c/0x110 [ 33.195391] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.196168] ? lock_is_held_type+0x9f/0x120 [ 33.196906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.197732] ? mtree_range_walk+0x632/0x900 [ 33.198487] ? mas_walk+0x5c7/0x7c0 [ 33.199164] do_vmi_munmap+0x1f1/0x2b0 [ 33.199846] mmap_region+0x1f9/0x2660 [ 33.200508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.201214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.202198] ? __pfx_lock_acquire+0x10/0x10 [ 33.202952] ? __pfx_mmap_region+0x10/0x10 [ 33.203685] ? security_mmap_addr+0x7d/0xa0 [ 33.204418] ? get_unmapped_area+0x1f5/0x3f0 [ 33.205170] do_mmap+0x854/0xf00 [ 33.205774] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.206451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.207096] ksys_mmap_pgoff+0x3af/0x500 [ 33.207598] do_syscall_64+0x3f/0x90 [ 33.208087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.208731] RIP: 0033:0x7f513905fd82 [ 33.209220] 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 [ 33.211328] RSP: 002b:00007ffc53957e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.212233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f513905fd82 [ 33.213093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5138499000 [ 33.213939] RBP: 00007f5138499000 R08: 0000000000000009 R09: 0000000000001000 [ 33.214836] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce0e514ec0 [ 33.215709] R13: 00007ffc53957e70 R14: 00007ffc53957ea0 R15: 00007ffc53958200 [ 33.216575] [ 33.216864] [ 33.217092] Allocated by task 211: [ 33.217523] kasan_save_stack+0x22/0x50 [ 33.218041] kasan_set_track+0x25/0x30 [ 33.218547] __kasan_slab_alloc+0x59/0x70 [ 33.219138] kmem_cache_alloc+0x16b/0x370 [ 33.219836] vm_area_dup+0x20/0x160 [ 33.220312] __split_vma+0x170/0x950 [ 33.220783] split_vma+0xc6/0x110 [ 33.221232] mprotect_fixup+0x8d2/0xb30 [ 33.221738] do_mprotect_pkey+0x87e/0xd40 [ 33.222272] __x64_sys_mprotect+0x78/0xc0 [ 33.222818] do_syscall_64+0x3f/0x90 [ 33.223310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.223959] [ 33.224191] Freed by task 19: [ 33.224565] kasan_save_stack+0x22/0x50 [ 33.225086] kasan_set_track+0x25/0x30 [ 33.225587] kasan_save_free_info+0x2b/0x50 [ 33.226123] __kasan_slab_free+0x10a/0x190 [ 33.226684] kmem_cache_free+0x10d/0x4d0 [ 33.227216] rcu_core+0x8c8/0x2860 [ 33.227659] __do_softirq+0x1b7/0x7d4 [ 33.228147] [ 33.228358] Last potentially related work creation: [ 33.228934] kasan_save_stack+0x22/0x50 [ 33.229456] __kasan_record_aux_stack+0x8e/0xa0 [ 33.230043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.230690] remove_vma+0x139/0x170 [ 33.231149] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.231704] do_vmi_munmap+0x1f1/0x2b0 [ 33.232201] __vm_munmap+0x138/0x3a0 [ 33.232655] __x64_sys_munmap+0x59/0x80 [ 33.233163] do_syscall_64+0x3f/0x90 [ 33.233635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.234316] [ 33.234532] Second to last potentially related work creation: [ 33.235261] kasan_save_stack+0x22/0x50 [ 33.235756] __kasan_record_aux_stack+0x8e/0xa0 [ 33.236332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.236973] remove_vma+0x139/0x170 [ 33.237418] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.237982] do_vmi_munmap+0x1f1/0x2b0 [ 33.238482] __vm_munmap+0x138/0x3a0 [ 33.238966] __x64_sys_munmap+0x59/0x80 [ 33.239577] do_syscall_64+0x3f/0x90 [ 33.240065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.240712] [ 33.240923] The buggy address belongs to the object at ffff888016ff6bc8 [ 33.240923] which belongs to the cache vm_area_struct of size 168 [ 33.242414] The buggy address is located 88 bytes inside of [ 33.242414] freed 168-byte region [ffff888016ff6bc8, ffff888016ff6c70) [ 33.243825] [ 33.244068] The buggy address belongs to the physical page: [ 33.244726] page:0000000093a85958 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ff6 [ 33.245815] memcg:ffff88800f12f701 [ 33.246245] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.246896] page_type: 0xffffffff() [ 33.247346] raw: 0100000000000200 ffff88800879fc80 ffffea00005fc840 dead000000000006 [ 33.248275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f12f701 [ 33.249208] page dumped because: kasan: bad access detected [ 33.249859] [ 33.250089] Memory state around the buggy address: [ 33.250685] ffff888016ff6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.251546] ffff888016ff6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.252400] >ffff888016ff6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.253245] ^ [ 33.253772] ffff888016ff6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.254645] ffff888016ff6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.255500] ================================================================== [ 33.256442] Disabling lock debugging due to kernel taint [ 35.901901] BUG: Bad rss-counter state mm:000000003ae53128 type:MM_FILEPAGES val:33 [ 35.902684] BUG: Bad rss-counter state mm:000000003ae53128 type:MM_ANONPAGES val:22 [ 36.354535] BUG: Bad rss-counter state mm:0000000010c7fa94 type:MM_FILEPAGES val:33 [ 36.356097] BUG: Bad rss-counter state mm:0000000010c7fa94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57879' (ECDSA) to the list of known hosts. 2023/06/20 06:52:06 fuzzer started 2023/06/20 06:52:06 dialing manager at localhost:44161 2023/06/20 06:52:06 checking machine... 2023/06/20 06:52:06 checking revisions... [ 37.067097] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:52:07 testing simple program... [ 37.113176] cgroup: Unknown subsys name 'net' [ 37.152211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:51:57 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff88800f2f0000 RCX=0000000000000100 RDX=00000000000101f7 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800f2f0000 RSP=ffff88806ce09688 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000000 R12=00000000000101f7 R13=ffff88800f2f0180 R14=ffff88800f2f44c8 R15=ffff88800f2f0008 RIP=ffffffff821920cf RFL=00000046 [---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 00007f274e57e900 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=00007fff7ebf3000 CR3=000000000d948000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f1870561e40 CR3=00000000094f2000 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=0beeba0767bd18880743268fa7577f7a XMM02=2c67c8bc2e329bc3000000000011d8c0 XMM03=fb795ef6d65770560000000000123bd8 XMM04=69e0b7b176ed05a900000000000ae988 XMM05=751b9502027dc0b90000000000134840 XMM06=bdf2e299e47b49d500000000001346c8 XMM07=e042d86d42eb936e0000000000123eb0 XMM08=8eba1fa857ec4e34000000000011d920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000