syzkaller login: [ 43.966083] BUG: Bad rss-counter state mm:00000000ace3e2c1 type:MM_FILEPAGES val:33 [ 43.967822] BUG: Bad rss-counter state mm:00000000ace3e2c1 type:MM_ANONPAGES val:22 [ 44.141715] ================================================================== [ 44.142629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.143577] Read of size 8 at addr ffff888018342b38 by task sshd/219 [ 44.144442] [ 44.144660] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.145518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.146491] Call Trace: [ 44.146892] [ 44.147182] dump_stack_lvl+0x91/0xf0 [ 44.147681] print_report+0xcc/0x620 [ 44.148250] ? __virt_addr_valid+0x102/0x340 [ 44.148904] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.149632] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.150358] kasan_report+0xbe/0xf0 [ 44.150926] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.151658] vma_interval_tree_remove+0xc75/0xec0 [ 44.152365] vma_prepare+0xc54/0x11a0 [ 44.152925] __split_vma+0x5af/0x950 [ 44.153485] ? __pfx___split_vma+0x10/0x10 [ 44.154112] ? find_held_lock+0x2c/0x110 [ 44.154731] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.155400] ? lock_is_held_type+0x9f/0x120 [ 44.156029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.156739] ? mtree_range_walk+0x632/0x900 [ 44.157393] ? mas_walk+0x5c7/0x7c0 [ 44.158121] do_vmi_munmap+0x1f1/0x2b0 [ 44.158943] mmap_region+0x1f9/0x2660 [ 44.159716] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.160377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.161304] ? __pfx_lock_acquire+0x10/0x10 [ 44.161880] ? __pfx_mmap_region+0x10/0x10 [ 44.162421] ? security_mmap_addr+0x7d/0xa0 [ 44.162987] ? get_unmapped_area+0x1f5/0x3f0 [ 44.163540] do_mmap+0x854/0xf00 [ 44.164008] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.164510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.165176] ksys_mmap_pgoff+0x3af/0x500 [ 44.165699] do_syscall_64+0x3f/0x90 [ 44.166177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.166826] RIP: 0033:0x7fb408344d82 [ 44.167285] 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 [ 44.169440] RSP: 002b:00007ffd4a08c428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.170351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb408344d82 [ 44.171231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb40777e000 [ 44.172080] RBP: 00007fb40777e000 R08: 0000000000000009 R09: 0000000000001000 [ 44.172926] R10: 0000000000000812 R11: 0000000000000206 R12: 000055beebbd9f70 [ 44.173772] R13: 00007ffd4a08c440 R14: 00007ffd4a08c470 R15: 00007ffd4a08c7d0 [ 44.174635] [ 44.174935] [ 44.175148] Allocated by task 212: [ 44.175578] kasan_save_stack+0x22/0x50 [ 44.176080] kasan_set_track+0x25/0x30 [ 44.176572] __kasan_slab_alloc+0x59/0x70 [ 44.177099] kmem_cache_alloc+0x16b/0x370 [ 44.177616] vm_area_dup+0x20/0x160 [ 44.178076] __split_vma+0x170/0x950 [ 44.178543] split_vma+0xc6/0x110 [ 44.179004] mprotect_fixup+0x8d2/0xb30 [ 44.179510] do_mprotect_pkey+0x87e/0xd40 [ 44.180068] __x64_sys_mprotect+0x78/0xc0 [ 44.180590] do_syscall_64+0x3f/0x90 [ 44.181099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.181770] [ 44.181997] Freed by task 209: [ 44.182391] kasan_save_stack+0x22/0x50 [ 44.182915] kasan_set_track+0x25/0x30 [ 44.183413] kasan_save_free_info+0x2b/0x50 [ 44.183981] __kasan_slab_free+0x10a/0x190 [ 44.184521] kmem_cache_free+0x10d/0x4d0 [ 44.185075] rcu_core+0x8c8/0x2860 [ 44.185529] __do_softirq+0x1b7/0x7d4 [ 44.186040] [ 44.186259] Last potentially related work creation: [ 44.186893] kasan_save_stack+0x22/0x50 [ 44.187403] __kasan_record_aux_stack+0x8e/0xa0 [ 44.187991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.188644] remove_vma+0x139/0x170 [ 44.189116] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.189674] do_vmi_munmap+0x1f1/0x2b0 [ 44.190208] __vm_munmap+0x138/0x3a0 [ 44.190686] __x64_sys_munmap+0x59/0x80 [ 44.191235] do_syscall_64+0x3f/0x90 [ 44.191726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.192378] [ 44.192596] The buggy address belongs to the object at ffff888018342ae0 [ 44.192596] which belongs to the cache vm_area_struct of size 168 [ 44.194072] The buggy address is located 88 bytes inside of [ 44.194072] freed 168-byte region [ffff888018342ae0, ffff888018342b88) [ 44.195476] [ 44.195690] The buggy address belongs to the physical page: [ 44.196343] page:000000003048953f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18342 [ 44.197435] memcg:ffff88800fe18b01 [ 44.197862] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.198514] page_type: 0xffffffff() [ 44.199006] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.199952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe18b01 [ 44.200889] page dumped because: kasan: bad access detected [ 44.201574] [ 44.201800] Memory state around the buggy address: [ 44.202404] ffff888018342a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.203310] ffff888018342a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 44.204181] >ffff888018342b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.205075] ^ [ 44.205715] ffff888018342b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.206591] ffff888018342c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.207482] ================================================================== [ 44.208600] Disabling lock debugging due to kernel taint [ 46.500687] BUG: Bad rss-counter state mm:00000000f90ba98a type:MM_FILEPAGES val:33 [ 46.502243] BUG: Bad rss-counter state mm:00000000f90ba98a type:MM_ANONPAGES val:22 [ 46.956267] BUG: Bad rss-counter state mm:0000000004eaca97 type:MM_FILEPAGES val:33 [ 46.957248] BUG: Bad rss-counter state mm:0000000004eaca97 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37704' (ECDSA) to the list of known hosts. 2023/06/20 06:42:26 fuzzer started 2023/06/20 06:42:27 dialing manager at localhost:44161 2023/06/20 06:42:27 checking machine... 2023/06/20 06:42:27 checking revisions... [ 47.671187] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:42:27 testing simple program... [ 47.711453] cgroup: Unknown subsys name 'net' [ 47.748291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:42:13 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fbdeabae040 CR3=000000000c9fa000 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=7c5c0e7073cd6a998a4a5bcf98821ab4 XMM02=000000000011faf8eff9b2d0a8fce9cb XMM03=000000000011fbc82c67c8bc2e329bc3 XMM04=138f8deec83452fe00000000000ae988 XMM05=3f40522c3d490a420000000000134f00 XMM06=806171799158d9670000000000133cf0 XMM07=fb795ef6d65770560000000000124308 XMM08=2c67c8bc2e329bc3000000000011fb68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83866998 RDI=ffff888016e41f34 RBP=ffff888016e41b40 RSP=ffff888019f57798 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000dff00000dff R12=ffff888016e41b40 R13=ffff88800f94ea00 R14=ffff88800ee36579 R15=ffff88800ee36600 RIP=ffffffff813744d5 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 00007fe924ddb900 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=00007fe925392618 CR3=000000001cea8000 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=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