syzkaller login: [ 45.316045] BUG: Bad rss-counter state mm:00000000fcec80e0 type:MM_FILEPAGES val:33 [ 45.317298] BUG: Bad rss-counter state mm:00000000fcec80e0 type:MM_ANONPAGES val:22 [ 45.491091] ================================================================== [ 45.492011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.492997] Read of size 8 at addr ffff88800e35c798 by task sshd/219 [ 45.493908] [ 45.494128] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.494999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.496010] Call Trace: [ 45.496335] [ 45.496629] dump_stack_lvl+0x91/0xf0 [ 45.497121] print_report+0xcc/0x620 [ 45.497609] ? __virt_addr_valid+0x102/0x340 [ 45.498176] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.498816] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.499454] kasan_report+0xbe/0xf0 [ 45.499940] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.500591] vma_interval_tree_remove+0xc75/0xec0 [ 45.501220] vma_prepare+0xc54/0x11a0 [ 45.501721] __split_vma+0x5af/0x950 [ 45.502215] ? __pfx___split_vma+0x10/0x10 [ 45.502797] ? find_held_lock+0x2c/0x110 [ 45.503341] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.503927] ? lock_is_held_type+0x9f/0x120 [ 45.504494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.505127] ? mtree_range_walk+0x632/0x900 [ 45.505702] ? mas_walk+0x5c7/0x7c0 [ 45.506193] do_vmi_munmap+0x1f1/0x2b0 [ 45.506718] mmap_region+0x1f9/0x2660 [ 45.507217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.507752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.508497] ? __pfx_lock_acquire+0x10/0x10 [ 45.509056] ? __pfx_mmap_region+0x10/0x10 [ 45.509607] ? security_mmap_addr+0x7d/0xa0 [ 45.510159] ? get_unmapped_area+0x1f5/0x3f0 [ 45.510739] do_mmap+0x854/0xf00 [ 45.511197] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.511718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.512304] ksys_mmap_pgoff+0x3af/0x500 [ 45.512834] do_syscall_64+0x3f/0x90 [ 45.513329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.513999] RIP: 0033:0x7fc12aa5dd82 [ 45.514501] 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 [ 45.516724] RSP: 002b:00007ffe65034918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.517670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc12aa5dd82 [ 45.518567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc129e97000 [ 45.519447] RBP: 00007fc129e97000 R08: 0000000000000009 R09: 0000000000001000 [ 45.520332] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556064c8bd90 [ 45.521221] R13: 00007ffe65034930 R14: 00007ffe65034960 R15: 00007ffe65034cc0 [ 45.522116] [ 45.522447] [ 45.522671] Allocated by task 212: [ 45.523118] kasan_save_stack+0x22/0x50 [ 45.523646] kasan_set_track+0x25/0x30 [ 45.524167] __kasan_slab_alloc+0x59/0x70 [ 45.524711] kmem_cache_alloc+0x16b/0x370 [ 45.525245] vm_area_dup+0x20/0x160 [ 45.525720] __split_vma+0x170/0x950 [ 45.526205] split_vma+0xc6/0x110 [ 45.526694] mprotect_fixup+0x8d2/0xb30 [ 45.527221] do_mprotect_pkey+0x87e/0xd40 [ 45.527767] __x64_sys_mprotect+0x78/0xc0 [ 45.528311] do_syscall_64+0x3f/0x90 [ 45.528838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.529489] [ 45.529704] Freed by task 212: [ 45.530100] kasan_save_stack+0x22/0x50 [ 45.530617] kasan_set_track+0x25/0x30 [ 45.531120] kasan_save_free_info+0x2b/0x50 [ 45.531655] __kasan_slab_free+0x10a/0x190 [ 45.532248] kmem_cache_free+0x10d/0x4d0 [ 45.532891] rcu_core+0x8c8/0x2860 [ 45.533447] __do_softirq+0x1b7/0x7d4 [ 45.534042] [ 45.534335] Last potentially related work creation: [ 45.535085] kasan_save_stack+0x22/0x50 [ 45.535720] __kasan_record_aux_stack+0x8e/0xa0 [ 45.536447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.537246] remove_vma+0x139/0x170 [ 45.537808] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.538509] do_vmi_munmap+0x1f1/0x2b0 [ 45.539109] __vm_munmap+0x138/0x3a0 [ 45.539687] __x64_sys_munmap+0x59/0x80 [ 45.540300] do_syscall_64+0x3f/0x90 [ 45.540869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.541645] [ 45.541907] Second to last potentially related work creation: [ 45.542772] kasan_save_stack+0x22/0x50 [ 45.543394] __kasan_record_aux_stack+0x8e/0xa0 [ 45.544105] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.544883] remove_vma+0x139/0x170 [ 45.545441] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.546120] do_vmi_munmap+0x1f1/0x2b0 [ 45.546721] mmap_region+0x1f9/0x2660 [ 45.547306] do_mmap+0x854/0xf00 [ 45.547822] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.548423] ksys_mmap_pgoff+0x3af/0x500 [ 45.549047] do_syscall_64+0x3f/0x90 [ 45.549624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.550436] [ 45.550698] The buggy address belongs to the object at ffff88800e35c740 [ 45.550698] which belongs to the cache vm_area_struct of size 168 [ 45.552539] The buggy address is located 88 bytes inside of [ 45.552539] freed 168-byte region [ffff88800e35c740, ffff88800e35c7e8) [ 45.554302] [ 45.554567] The buggy address belongs to the physical page: [ 45.555392] page:000000001507b028 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe35c [ 45.556745] memcg:ffff88800df1c701 [ 45.557275] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.558075] page_type: 0xffffffff() [ 45.558648] raw: 0100000000000200 ffff88800879fc80 ffffea0000373600 dead000000000006 [ 45.559794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df1c701 [ 45.560914] page dumped because: kasan: bad access detected [ 45.561726] [ 45.561973] Memory state around the buggy address: [ 45.562599] ffff88800e35c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.563499] ffff88800e35c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.564392] >ffff88800e35c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.565279] ^ [ 45.565792] ffff88800e35c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 45.566698] ffff88800e35c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 45.567586] ================================================================== [ 45.568735] Disabling lock debugging due to kernel taint [ 47.477201] BUG: Bad rss-counter state mm:00000000380f8686 type:MM_FILEPAGES val:33 [ 47.478312] BUG: Bad rss-counter state mm:00000000380f8686 type:MM_ANONPAGES val:22 [ 48.055950] BUG: Bad rss-counter state mm:000000000ff94274 type:MM_FILEPAGES val:33 [ 48.056988] BUG: Bad rss-counter state mm:000000000ff94274 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54672' (ECDSA) to the list of known hosts. 2023/06/20 10:43:20 fuzzer started 2023/06/20 10:43:21 dialing manager at localhost:44161 2023/06/20 10:43:21 checking machine... 2023/06/20 10:43:21 checking revisions... [ 48.741089] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:43:21 testing simple program... [ 48.797588] cgroup: Unknown subsys name 'net' [ 48.842565] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:43:14 Registers: info registers vcpu 0 RAX=1ffffffff0bf45db RBX=ffffffff85fa2ed8 RCX=ffffffff83634882 RDX=0000000000000007 RSI=ffffffff863b0c40 RDI=ffffffff85fa2ecc RBP=ffffffff85fa2ecc RSP=ffff888016a97978 R8 =ffffffff863b0c40 R9 =ffff888016a97a70 R10=0000000000038001 R11=000000000008a6be R12=ffffffff85fa2ee8 R13=ffffffff85fa2ecc R14=ffffffff85fa2ecc R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007f648cc40900 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=00007f648d1f7618 CR3=00000000196a6000 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=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=00007efcf88cc000 CR3=0000000008ee4000 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=88b40c3b0d5a908e74417d4877939bbe XMM02=000000000011ea88ec2efd57dc4c00df XMM03=0000000000124c9098c0c77f50a57cf0 XMM04=a98621709b99dc7200000000000ae988 XMM05=dfcdbad4f1609c3700000000001358a0 XMM06=c12f76510d02bf920000000000134a78 XMM07=e042d86d42eb936e0000000000124f10 XMM08=98c0c77f50a57cf0000000000011eae8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000