syzkaller login: [ 31.030144] BUG: Bad rss-counter state mm:000000004a4cfe4d type:MM_FILEPAGES val:33 [ 31.031710] BUG: Bad rss-counter state mm:000000004a4cfe4d type:MM_ANONPAGES val:22 [ 31.186599] ================================================================== [ 31.187541] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.188480] Read of size 8 at addr ffff88800f627c20 by task sshd/221 [ 31.189254] [ 31.189566] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.190464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.191438] Call Trace: [ 31.191800] [ 31.192085] dump_stack_lvl+0x91/0xf0 [ 31.192576] print_report+0xcc/0x620 [ 31.193065] ? __virt_addr_valid+0x102/0x340 [ 31.193625] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194892] kasan_report+0xbe/0xf0 [ 31.195367] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196000] vma_interval_tree_remove+0xc75/0xec0 [ 31.196613] vma_prepare+0xc54/0x11a0 [ 31.197098] __split_vma+0x5af/0x950 [ 31.197574] ? __pfx___split_vma+0x10/0x10 [ 31.198107] ? find_held_lock+0x2c/0x110 [ 31.198624] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.199209] ? lock_is_held_type+0x9f/0x120 [ 31.199781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.200395] ? mtree_range_walk+0x632/0x900 [ 31.200958] ? mas_walk+0x5c7/0x7c0 [ 31.201449] do_vmi_munmap+0x1f1/0x2b0 [ 31.201950] mmap_region+0x1f9/0x2660 [ 31.202446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.202959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.203698] ? __pfx_lock_acquire+0x10/0x10 [ 31.204245] ? __pfx_mmap_region+0x10/0x10 [ 31.204784] ? security_mmap_addr+0x7d/0xa0 [ 31.205315] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205866] do_mmap+0x854/0xf00 [ 31.206316] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206820] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.207389] ksys_mmap_pgoff+0x3af/0x500 [ 31.207912] do_syscall_64+0x3f/0x90 [ 31.208419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209070] RIP: 0033:0x7f3bca96fd82 [ 31.209528] 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 [ 31.211687] RSP: 002b:00007ffde99eefa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.212628] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bca96fd82 [ 31.213502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bc9da9000 [ 31.214375] RBP: 00007f3bc9da9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.215227] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff088b1f70 [ 31.216087] R13: 00007ffde99eefc0 R14: 00007ffde99eeff0 R15: 00007ffde99ef350 [ 31.216980] [ 31.217293] [ 31.217523] Allocated by task 214: [ 31.217973] kasan_save_stack+0x22/0x50 [ 31.218495] kasan_set_track+0x25/0x30 [ 31.219001] __kasan_slab_alloc+0x59/0x70 [ 31.219569] kmem_cache_alloc+0x16b/0x370 [ 31.220097] vm_area_dup+0x20/0x160 [ 31.220567] __split_vma+0x170/0x950 [ 31.221055] split_vma+0xc6/0x110 [ 31.221501] mprotect_fixup+0x8d2/0xb30 [ 31.222001] do_mprotect_pkey+0x87e/0xd40 [ 31.222553] __x64_sys_mprotect+0x78/0xc0 [ 31.223093] do_syscall_64+0x3f/0x90 [ 31.223599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224273] [ 31.224496] Freed by task 214: [ 31.224904] kasan_save_stack+0x22/0x50 [ 31.225439] kasan_set_track+0x25/0x30 [ 31.225944] kasan_save_free_info+0x2b/0x50 [ 31.226493] __kasan_slab_free+0x10a/0x190 [ 31.227043] kmem_cache_free+0x10d/0x4d0 [ 31.227575] rcu_core+0x8c8/0x2860 [ 31.228026] __do_softirq+0x1b7/0x7d4 [ 31.228510] [ 31.228735] Last potentially related work creation: [ 31.229345] kasan_save_stack+0x22/0x50 [ 31.229855] __kasan_record_aux_stack+0x8e/0xa0 [ 31.230447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.231102] remove_vma+0x139/0x170 [ 31.231574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.232139] do_vmi_munmap+0x1f1/0x2b0 [ 31.232633] __vm_munmap+0x138/0x3a0 [ 31.233107] __x64_sys_munmap+0x59/0x80 [ 31.233617] do_syscall_64+0x3f/0x90 [ 31.234099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234746] [ 31.234963] The buggy address belongs to the object at ffff88800f627bc8 [ 31.234963] which belongs to the cache vm_area_struct of size 168 [ 31.236516] The buggy address is located 88 bytes inside of [ 31.236516] freed 168-byte region [ffff88800f627bc8, ffff88800f627c70) [ 31.237978] [ 31.238206] The buggy address belongs to the physical page: [ 31.238891] page:00000000281d022f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf627 [ 31.240056] memcg:ffff8880167ad401 [ 31.240497] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.241177] page_type: 0xffffffff() [ 31.241644] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.242602] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167ad401 [ 31.243584] page dumped because: kasan: bad access detected [ 31.244274] [ 31.244501] Memory state around the buggy address: [ 31.245095] ffff88800f627b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.245989] ffff88800f627b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.246845] >ffff88800f627c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.247704] ^ [ 31.248238] ffff88800f627c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.249132] ffff88800f627d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.249996] ================================================================== [ 31.251098] Disabling lock debugging due to kernel taint [ 33.197098] BUG: Bad rss-counter state mm:00000000ffb48e01 type:MM_FILEPAGES val:33 [ 33.198145] BUG: Bad rss-counter state mm:00000000ffb48e01 type:MM_ANONPAGES val:22 [ 33.771607] BUG: Bad rss-counter state mm:00000000d6d09866 type:MM_FILEPAGES val:33 [ 33.772768] BUG: Bad rss-counter state mm:00000000d6d09866 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35725' (ECDSA) to the list of known hosts. 2023/06/21 02:44:14 fuzzer started 2023/06/21 02:44:14 dialing manager at localhost:36067 2023/06/21 02:44:14 checking machine... 2023/06/21 02:44:14 checking revisions... [ 34.458759] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:44:14 testing simple program... [ 34.515089] cgroup: Unknown subsys name 'net' [ 34.605837] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:44:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0323c6f040 CR3=00000000096a8000 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=b9dd1c4c4b7621935443b65a344d045d XMM02=ec2efd57dc4c00df000000000011d460 XMM03=a13d909ef4a400e2000000000011d530 XMM04=fd9830a170507fd600000000000ae988 XMM05=077619af27c6be3500000000001327a8 XMM06=c291bd5c70af25b90000000000131848 XMM07=e042d86d42eb936e0000000000121e18 XMM08=a13d909ef4a400e2000000000011d530 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000049693e4c RCX=ffff88806c89f260 RDX=0000000000000008 RSI=0000000000000001 RDI=00000000ce9efed8 RBP=ffff88800cefcfe0 RSP=ffff88806cf09b10 R8 =000000008c8b33ba R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09b78 R15=0000000000000008 RIP=ffffffff822704ed 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 00007fb8b99ab900 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=00007ffc3d75f000 CR3=000000000d628000 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