syzkaller login: [ 28.737341] BUG: Bad rss-counter state mm:00000000ec2cd338 type:MM_FILEPAGES val:33 [ 28.738862] BUG: Bad rss-counter state mm:00000000ec2cd338 type:MM_ANONPAGES val:22 [ 28.881172] ================================================================== [ 28.882069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.882989] Read of size 8 at addr ffff88800e7f8df0 by task sshd/219 [ 28.883724] [ 28.883940] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.884879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.885849] Call Trace: [ 28.886163] [ 28.886453] dump_stack_lvl+0x91/0xf0 [ 28.886927] print_report+0xcc/0x620 [ 28.887401] ? __virt_addr_valid+0x102/0x340 [ 28.887945] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888547] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889150] kasan_report+0xbe/0xf0 [ 28.889640] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.890246] vma_interval_tree_remove+0xc75/0xec0 [ 28.890835] vma_prepare+0xc54/0x11a0 [ 28.891300] __split_vma+0x5af/0x950 [ 28.891759] ? __pfx___split_vma+0x10/0x10 [ 28.892272] ? find_held_lock+0x2c/0x110 [ 28.892779] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.893326] ? lock_is_held_type+0x9f/0x120 [ 28.893858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.894451] ? mtree_range_walk+0x632/0x900 [ 28.894994] ? mas_walk+0x5c7/0x7c0 [ 28.895467] do_vmi_munmap+0x1f1/0x2b0 [ 28.895946] mmap_region+0x1f9/0x2660 [ 28.896418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.896914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.897632] ? __pfx_lock_acquire+0x10/0x10 [ 28.898146] ? __pfx_mmap_region+0x10/0x10 [ 28.898666] ? security_mmap_addr+0x7d/0xa0 [ 28.899194] ? get_unmapped_area+0x1f5/0x3f0 [ 28.899731] do_mmap+0x854/0xf00 [ 28.900158] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.900640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.901197] ksys_mmap_pgoff+0x3af/0x500 [ 28.901697] do_syscall_64+0x3f/0x90 [ 28.902169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902803] RIP: 0033:0x7ff5095fcd82 [ 28.903251] 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 [ 28.905346] RSP: 002b:00007ffd16a88b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.906297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5095fcd82 [ 28.907119] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff508a36000 [ 28.907935] RBP: 00007ff508a36000 R08: 0000000000000009 R09: 0000000000001000 [ 28.908763] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c99af33ec0 [ 28.909607] R13: 00007ffd16a88b50 R14: 00007ffd16a88b80 R15: 00007ffd16a88ee0 [ 28.910443] [ 28.910731] [ 28.910944] Allocated by task 212: [ 28.911367] kasan_save_stack+0x22/0x50 [ 28.911859] kasan_set_track+0x25/0x30 [ 28.912340] __kasan_slab_alloc+0x59/0x70 [ 28.912860] kmem_cache_alloc+0x16b/0x370 [ 28.913371] vm_area_dup+0x20/0x160 [ 28.913840] __split_vma+0x170/0x950 [ 28.914323] split_vma+0xc6/0x110 [ 28.914790] mprotect_fixup+0x8d2/0xb30 [ 28.915317] do_mprotect_pkey+0x87e/0xd40 [ 28.915865] __x64_sys_mprotect+0x78/0xc0 [ 28.916413] do_syscall_64+0x3f/0x90 [ 28.916904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917594] [ 28.917810] Freed by task 212: [ 28.918205] kasan_save_stack+0x22/0x50 [ 28.918714] kasan_set_track+0x25/0x30 [ 28.919200] kasan_save_free_info+0x2b/0x50 [ 28.919724] __kasan_slab_free+0x10a/0x190 [ 28.920253] kmem_cache_free+0x10d/0x4d0 [ 28.920751] rcu_core+0x8c8/0x2860 [ 28.921194] __do_softirq+0x1b7/0x7d4 [ 28.921668] [ 28.921884] Last potentially related work creation: [ 28.922459] kasan_save_stack+0x22/0x50 [ 28.922964] __kasan_record_aux_stack+0x8e/0xa0 [ 28.923526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.924151] remove_vma+0x139/0x170 [ 28.924602] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.925144] do_vmi_munmap+0x1f1/0x2b0 [ 28.925631] __vm_munmap+0x138/0x3a0 [ 28.926095] __x64_sys_munmap+0x59/0x80 [ 28.926575] do_syscall_64+0x3f/0x90 [ 28.927058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.927687] [ 28.927897] Second to last potentially related work creation: [ 28.928569] kasan_save_stack+0x22/0x50 [ 28.929065] __kasan_record_aux_stack+0x8e/0xa0 [ 28.929658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.930279] remove_vma+0x139/0x170 [ 28.930726] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.931289] do_vmi_munmap+0x1f1/0x2b0 [ 28.931765] mmap_region+0x1f9/0x2660 [ 28.932235] do_mmap+0x854/0xf00 [ 28.932658] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.933138] ksys_mmap_pgoff+0x3af/0x500 [ 28.933646] do_syscall_64+0x3f/0x90 [ 28.934107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.934733] [ 28.934941] The buggy address belongs to the object at ffff88800e7f8d98 [ 28.934941] which belongs to the cache vm_area_struct of size 168 [ 28.936376] The buggy address is located 88 bytes inside of [ 28.936376] freed 168-byte region [ffff88800e7f8d98, ffff88800e7f8e40) [ 28.937768] [ 28.937983] The buggy address belongs to the physical page: [ 28.938627] page:000000009d60e08b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7f8 [ 28.939686] memcg:ffff88800ee5a601 [ 28.940097] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.940772] page_type: 0xffffffff() [ 28.941210] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318940 dead000000000005 [ 28.942112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee5a601 [ 28.942984] page dumped because: kasan: bad access detected [ 28.943622] [ 28.943839] Memory state around the buggy address: [ 28.944398] ffff88800e7f8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.945249] ffff88800e7f8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.946117] >ffff88800e7f8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.946952] ^ [ 28.947738] ffff88800e7f8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.948584] ffff88800e7f8e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.949415] ================================================================== [ 28.950736] Disabling lock debugging due to kernel taint [ 30.891814] BUG: Bad rss-counter state mm:00000000926f542b type:MM_FILEPAGES val:33 [ 30.893385] BUG: Bad rss-counter state mm:00000000926f542b type:MM_ANONPAGES val:22 [ 31.306334] BUG: Bad rss-counter state mm:000000007eb15b1a type:MM_FILEPAGES val:33 [ 31.307190] BUG: Bad rss-counter state mm:000000007eb15b1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55285' (ECDSA) to the list of known hosts. 2023/06/20 11:09:13 fuzzer started 2023/06/20 11:09:13 dialing manager at localhost:36067 2023/06/20 11:09:13 checking machine... 2023/06/20 11:09:13 checking revisions... [ 32.050478] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:09:14 testing simple program... [ 32.104766] cgroup: Unknown subsys name 'net' [ 32.149830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:13 Registers: info registers vcpu 0 RAX=0000000000091b45 RBX=0000000000000001 RCX=ffffffff8386b8a9 RDX=0000000000000001 RSI=ffffffff863de0a6 RDI=ffffffff85fc16d8 RBP=ffff88806ce09ac8 RSP=ffff88806ce099f0 R8 =ffffffff863de0a6 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000091b45 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8112fc12 RFL=00000202 [-------] 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 00007f12d5c01900 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=00007f12d61b8618 CR3=000000000f298000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ff71cb200f0 CR3=000000000ffd2000 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=ffc992dc8267638214410faeaed327ca XMM02=2c67c8bc2e329bc3000000000011dc68 XMM03=fb795ef6d657705600000000001222c8 XMM04=515ac05a7231fb2300000000000ae988 XMM05=dfcdbad4f1609c3700000000001334d0 XMM06=806171799158d9670000000000133358 XMM07=e042d86d42eb936e0000000000122548 XMM08=ef8fd4eb3f4e6a7d000000000011dcc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000