syzkaller login: [ 40.062739] BUG: Bad rss-counter state mm:000000001ea9a79d type:MM_FILEPAGES val:33 [ 40.063981] BUG: Bad rss-counter state mm:000000001ea9a79d type:MM_ANONPAGES val:22 [ 40.220868] ================================================================== [ 40.222117] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.223498] Read of size 8 at addr ffff88800d3eeed8 by task sshd/219 [ 40.224366] [ 40.224605] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.225545] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.226599] Call Trace: [ 40.226941] [ 40.227249] dump_stack_lvl+0x91/0xf0 [ 40.227772] print_report+0xcc/0x620 [ 40.228301] ? __virt_addr_valid+0x102/0x340 [ 40.228899] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.229532] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.230138] kasan_report+0xbe/0xf0 [ 40.230616] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.231231] vma_interval_tree_remove+0xc75/0xec0 [ 40.231833] vma_prepare+0xc54/0x11a0 [ 40.232310] __split_vma+0x5af/0x950 [ 40.232785] ? __pfx___split_vma+0x10/0x10 [ 40.233330] ? find_held_lock+0x2c/0x110 [ 40.233850] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.234409] ? lock_is_held_type+0x9f/0x120 [ 40.234949] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.235553] ? mtree_range_walk+0x632/0x900 [ 40.236093] ? mas_walk+0x5c7/0x7c0 [ 40.236565] do_vmi_munmap+0x1f1/0x2b0 [ 40.237053] mmap_region+0x1f9/0x2660 [ 40.237542] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.238050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.238764] ? __pfx_lock_acquire+0x10/0x10 [ 40.239299] ? __pfx_mmap_region+0x10/0x10 [ 40.239824] ? security_mmap_addr+0x7d/0xa0 [ 40.240346] ? get_unmapped_area+0x1f5/0x3f0 [ 40.240893] do_mmap+0x854/0xf00 [ 40.241340] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.241835] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.242384] ksys_mmap_pgoff+0x3af/0x500 [ 40.242888] do_syscall_64+0x3f/0x90 [ 40.243363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.244017] RIP: 0033:0x7fb4cf0d0d82 [ 40.244476] 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 [ 40.246607] RSP: 002b:00007fff0dcc5588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.247515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4cf0d0d82 [ 40.248357] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4ce50a000 [ 40.249211] RBP: 00007fb4ce50a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.250062] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a78d9aec0 [ 40.250900] R13: 00007fff0dcc55a0 R14: 00007fff0dcc55d0 R15: 00007fff0dcc5930 [ 40.251755] [ 40.252043] [ 40.252252] Allocated by task 212: [ 40.252686] kasan_save_stack+0x22/0x50 [ 40.253190] kasan_set_track+0x25/0x30 [ 40.253673] __kasan_slab_alloc+0x59/0x70 [ 40.254200] kmem_cache_alloc+0x16b/0x370 [ 40.254719] vm_area_dup+0x20/0x160 [ 40.255168] __split_vma+0x170/0x950 [ 40.255636] split_vma+0xc6/0x110 [ 40.256070] mprotect_fixup+0x8d2/0xb30 [ 40.256570] do_mprotect_pkey+0x87e/0xd40 [ 40.257080] __x64_sys_mprotect+0x78/0xc0 [ 40.257616] do_syscall_64+0x3f/0x90 [ 40.258083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.258719] [ 40.258934] Freed by task 212: [ 40.259330] kasan_save_stack+0x22/0x50 [ 40.259838] kasan_set_track+0x25/0x30 [ 40.260324] kasan_save_free_info+0x2b/0x50 [ 40.260846] __kasan_slab_free+0x10a/0x190 [ 40.261387] kmem_cache_free+0x10d/0x4d0 [ 40.261894] rcu_core+0x8c8/0x2860 [ 40.262341] __do_softirq+0x1b7/0x7d4 [ 40.262819] [ 40.263039] Last potentially related work creation: [ 40.263626] kasan_save_stack+0x22/0x50 [ 40.264201] __kasan_record_aux_stack+0x8e/0xa0 [ 40.264778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.265440] remove_vma+0x139/0x170 [ 40.265883] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.266438] do_vmi_munmap+0x1f1/0x2b0 [ 40.266924] __vm_munmap+0x138/0x3a0 [ 40.267387] __x64_sys_munmap+0x59/0x80 [ 40.267886] do_syscall_64+0x3f/0x90 [ 40.268354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.268991] [ 40.269224] Second to last potentially related work creation: [ 40.269915] kasan_save_stack+0x22/0x50 [ 40.270423] __kasan_record_aux_stack+0x8e/0xa0 [ 40.270987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.271629] remove_vma+0x139/0x170 [ 40.272079] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.272638] do_vmi_munmap+0x1f1/0x2b0 [ 40.273119] mmap_region+0x1f9/0x2660 [ 40.273599] do_mmap+0x854/0xf00 [ 40.274023] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.274512] ksys_mmap_pgoff+0x3af/0x500 [ 40.275009] do_syscall_64+0x3f/0x90 [ 40.275482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.276118] [ 40.276334] The buggy address belongs to the object at ffff88800d3eee80 [ 40.276334] which belongs to the cache vm_area_struct of size 168 [ 40.277821] The buggy address is located 88 bytes inside of [ 40.277821] freed 168-byte region [ffff88800d3eee80, ffff88800d3eef28) [ 40.279229] [ 40.279439] The buggy address belongs to the physical page: [ 40.280088] page:000000008f63fe5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd3ee [ 40.281183] memcg:ffff88800d4a5a01 [ 40.281605] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.282294] page_type: 0xffffffff() [ 40.282741] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.283637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4a5a01 [ 40.284534] page dumped because: kasan: bad access detected [ 40.285199] [ 40.285416] Memory state around the buggy address: [ 40.286003] ffff88800d3eed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.286861] ffff88800d3eee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.287716] >ffff88800d3eee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.288561] ^ [ 40.289291] ffff88800d3eef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.290140] ffff88800d3eef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.290992] ================================================================== [ 40.291966] Disabling lock debugging due to kernel taint [ 42.801421] BUG: Bad rss-counter state mm:000000007e37be5a type:MM_FILEPAGES val:33 [ 42.802604] BUG: Bad rss-counter state mm:000000007e37be5a type:MM_ANONPAGES val:22 [ 43.218798] BUG: Bad rss-counter state mm:00000000c7632da6 type:MM_FILEPAGES val:33 [ 43.220021] BUG: Bad rss-counter state mm:00000000c7632da6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10500' (ECDSA) to the list of known hosts. 2023/06/19 13:24:44 fuzzer started 2023/06/19 13:24:44 dialing manager at localhost:44161 2023/06/19 13:24:44 checking machine... 2023/06/19 13:24:44 checking revisions... [ 43.795809] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:24:44 testing simple program... [ 43.841257] cgroup: Unknown subsys name 'net' [ 43.913418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:42 Registers: info registers vcpu 0 RAX=ffffffff86096757 RBX=0000000000000002 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a48 R15=ffff88806ce09a98 RIP=ffffffff81130b8f 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 00007f9c28a7a900 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=00007ffcc85d6000 CR3=0000000008ef4000 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=ffff888008c58400 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=00007f371293a000 CR3=00000000136a2000 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=0cbda085e2af34974b47b976f3d51180 XMM02=000000000011d120eff9b2d0a8fce9cb XMM03=000000000011d1f02c67c8bc2e329bc3 XMM04=155f3b494c359e3f00000000000ae988 XMM05=19e9129bd510f2350000000000134780 XMM06=7467ae23c74c341d0000000000133958 XMM07=e042d86d42eb936e0000000000123dd0 XMM08=5f577a77155fccb0000000000011d1f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000