syzkaller login: [ 30.664523] sshd (215) used greatest stack depth: 24120 bytes left [ 30.665405] BUG: Bad rss-counter state mm:000000009c577589 type:MM_FILEPAGES val:33 [ 30.666350] BUG: Bad rss-counter state mm:000000009c577589 type:MM_ANONPAGES val:22 [ 30.848463] ================================================================== [ 30.849477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.850508] Read of size 8 at addr ffff88800e84a968 by task sshd/222 [ 30.851473] [ 30.851746] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.852701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.853801] Call Trace: [ 30.854151] [ 30.854461] dump_stack_lvl+0x91/0xf0 [ 30.855002] print_report+0xcc/0x620 [ 30.855533] ? __virt_addr_valid+0x102/0x340 [ 30.856151] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856837] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.857528] kasan_report+0xbe/0xf0 [ 30.858071] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.858765] vma_interval_tree_remove+0xc75/0xec0 [ 30.859443] vma_prepare+0xc54/0x11a0 [ 30.860003] __split_vma+0x5af/0x950 [ 30.860541] ? __pfx___split_vma+0x10/0x10 [ 30.861148] ? find_held_lock+0x2c/0x110 [ 30.861740] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.862378] ? lock_is_held_type+0x9f/0x120 [ 30.862987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.863698] ? mtree_range_walk+0x632/0x900 [ 30.864330] ? mas_walk+0x5c7/0x7c0 [ 30.864873] do_vmi_munmap+0x1f1/0x2b0 [ 30.865435] mmap_region+0x1f9/0x2660 [ 30.865986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.866565] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.867368] ? __pfx_lock_acquire+0x10/0x10 [ 30.867974] ? __pfx_mmap_region+0x10/0x10 [ 30.868569] ? security_mmap_addr+0x7d/0xa0 [ 30.869176] ? get_unmapped_area+0x1f5/0x3f0 [ 30.869801] do_mmap+0x854/0xf00 [ 30.870293] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.870854] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.871484] ksys_mmap_pgoff+0x3af/0x500 [ 30.872060] do_syscall_64+0x3f/0x90 [ 30.872598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873331] RIP: 0033:0x7f533144ed82 [ 30.873848] 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 [ 30.876261] RSP: 002b:00007fff8b234f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.877283] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f533144ed82 [ 30.878227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5330888000 [ 30.879183] RBP: 00007f5330888000 R08: 0000000000000009 R09: 0000000000001000 [ 30.880144] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb0d9daf70 [ 30.881096] R13: 00007fff8b234f50 R14: 00007fff8b234f80 R15: 00007fff8b2352e0 [ 30.882043] [ 30.882372] [ 30.882605] Allocated by task 215: [ 30.883079] kasan_save_stack+0x22/0x50 [ 30.883618] kasan_set_track+0x25/0x30 [ 30.884172] __kasan_slab_alloc+0x59/0x70 [ 30.884736] kmem_cache_alloc+0x16b/0x370 [ 30.885286] vm_area_dup+0x20/0x160 [ 30.885777] __split_vma+0x170/0x950 [ 30.886278] split_vma+0xc6/0x110 [ 30.886749] mprotect_fixup+0x8d2/0xb30 [ 30.887284] do_mprotect_pkey+0x87e/0xd40 [ 30.887866] __x64_sys_mprotect+0x78/0xc0 [ 30.888425] do_syscall_64+0x3f/0x90 [ 30.888933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889619] [ 30.889848] Freed by task 215: [ 30.890276] kasan_save_stack+0x22/0x50 [ 30.890814] kasan_set_track+0x25/0x30 [ 30.891347] kasan_save_free_info+0x2b/0x50 [ 30.891945] __kasan_slab_free+0x10a/0x190 [ 30.892514] kmem_cache_free+0x10d/0x4d0 [ 30.893059] rcu_core+0x8c8/0x2860 [ 30.893542] __do_softirq+0x1b7/0x7d4 [ 30.894066] [ 30.894296] Last potentially related work creation: [ 30.894931] kasan_save_stack+0x22/0x50 [ 30.895468] __kasan_record_aux_stack+0x8e/0xa0 [ 30.896106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.896799] remove_vma+0x139/0x170 [ 30.897284] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.897887] do_vmi_munmap+0x1f1/0x2b0 [ 30.898406] __vm_munmap+0x138/0x3a0 [ 30.898914] __x64_sys_munmap+0x59/0x80 [ 30.899444] do_syscall_64+0x3f/0x90 [ 30.899955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900649] [ 30.900886] The buggy address belongs to the object at ffff88800e84a910 [ 30.900886] which belongs to the cache vm_area_struct of size 168 [ 30.902452] The buggy address is located 88 bytes inside of [ 30.902452] freed 168-byte region [ffff88800e84a910, ffff88800e84a9b8) [ 30.903972] [ 30.904207] The buggy address belongs to the physical page: [ 30.904959] page:0000000044843a95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe84a [ 30.906342] memcg:ffff88800c59ee01 [ 30.906861] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.907559] page_type: 0xffffffff() [ 30.908064] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.909045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c59ee01 [ 30.910018] page dumped because: kasan: bad access detected [ 30.910749] [ 30.910982] Memory state around the buggy address: [ 30.911620] ffff88800e84a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.912561] ffff88800e84a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.913489] >ffff88800e84a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.914408] ^ [ 30.915261] ffff88800e84a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.916216] ffff88800e84aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.917141] ================================================================== [ 30.918228] Disabling lock debugging due to kernel taint [ 32.892065] BUG: Bad rss-counter state mm:00000000c7299078 type:MM_FILEPAGES val:33 [ 32.893352] BUG: Bad rss-counter state mm:00000000c7299078 type:MM_ANONPAGES val:22 [ 33.451905] BUG: Bad rss-counter state mm:00000000c073a09a type:MM_FILEPAGES val:33 [ 33.453104] BUG: Bad rss-counter state mm:00000000c073a09a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44702' (ECDSA) to the list of known hosts. 2023/06/20 18:17:22 fuzzer started 2023/06/20 18:17:23 dialing manager at localhost:36067 2023/06/20 18:17:23 checking machine... 2023/06/20 18:17:23 checking revisions... [ 34.097920] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:17:23 testing simple program... [ 34.136415] cgroup: Unknown subsys name 'net' [ 34.186967] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:17:22 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865c19f0 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113078b 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 00007f4d24918900 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=00007f0abb5c4650 CR3=00000000101f2000 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=de3f97db3b54cc4200000000000ae988 XMM05=4d9e92aa17ca928900000000001326d0 XMM06=00c3ffa147b8d85700000000001314c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff110031f4ed3 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888018fa7680 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f0abb00f900 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=00007ffe77d64000 CR3=00000000197e2000 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=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