syzkaller login: [ 31.035932] sshd (214) used greatest stack depth: 24128 bytes left [ 31.036764] BUG: Bad rss-counter state mm:00000000db6cedf7 type:MM_FILEPAGES val:33 [ 31.038466] BUG: Bad rss-counter state mm:00000000db6cedf7 type:MM_ANONPAGES val:22 [ 31.185296] ================================================================== [ 31.186186] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.187113] Read of size 8 at addr ffff888015e8f968 by task sshd/221 [ 31.187872] [ 31.188090] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.189075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.190038] Call Trace: [ 31.190351] [ 31.190632] dump_stack_lvl+0x91/0xf0 [ 31.191141] print_report+0xcc/0x620 [ 31.191616] ? __virt_addr_valid+0x102/0x340 [ 31.192168] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192779] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193416] kasan_report+0xbe/0xf0 [ 31.193887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194503] vma_interval_tree_remove+0xc75/0xec0 [ 31.195099] vma_prepare+0xc54/0x11a0 [ 31.195575] __split_vma+0x5af/0x950 [ 31.196051] ? __pfx___split_vma+0x10/0x10 [ 31.196582] ? find_held_lock+0x2c/0x110 [ 31.197117] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.197673] ? lock_is_held_type+0x9f/0x120 [ 31.198223] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.198860] ? mtree_range_walk+0x632/0x900 [ 31.199415] ? mas_walk+0x5c7/0x7c0 [ 31.199885] do_vmi_munmap+0x1f1/0x2b0 [ 31.200377] mmap_region+0x1f9/0x2660 [ 31.200854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.201382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202091] ? __pfx_lock_acquire+0x10/0x10 [ 31.202614] ? __pfx_mmap_region+0x10/0x10 [ 31.203139] ? security_mmap_addr+0x7d/0xa0 [ 31.203664] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204207] do_mmap+0x854/0xf00 [ 31.204639] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.205704] ksys_mmap_pgoff+0x3af/0x500 [ 31.206206] do_syscall_64+0x3f/0x90 [ 31.206681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207322] RIP: 0033:0x7f08fa8bad82 [ 31.207772] 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 [ 31.209924] RSP: 002b:00007ffe42dfa8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08fa8bad82 [ 31.211672] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08f9cf4000 [ 31.212533] RBP: 00007f08f9cf4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.213386] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c5c953ec0 [ 31.214233] R13: 00007ffe42dfa8f0 R14: 00007ffe42dfa920 R15: 00007ffe42dfac80 [ 31.215101] [ 31.215392] [ 31.215604] Allocated by task 214: [ 31.216025] kasan_save_stack+0x22/0x50 [ 31.216519] kasan_set_track+0x25/0x30 [ 31.217006] __kasan_slab_alloc+0x59/0x70 [ 31.217550] kmem_cache_alloc+0x16b/0x370 [ 31.218059] vm_area_dup+0x20/0x160 [ 31.218508] __split_vma+0x170/0x950 [ 31.218972] split_vma+0xc6/0x110 [ 31.219402] mprotect_fixup+0x8d2/0xb30 [ 31.219896] do_mprotect_pkey+0x87e/0xd40 [ 31.220405] __x64_sys_mprotect+0x78/0xc0 [ 31.220918] do_syscall_64+0x3f/0x90 [ 31.221396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222027] [ 31.222239] Freed by task 214: [ 31.222628] kasan_save_stack+0x22/0x50 [ 31.223126] kasan_set_track+0x25/0x30 [ 31.223611] kasan_save_free_info+0x2b/0x50 [ 31.224146] __kasan_slab_free+0x10a/0x190 [ 31.224673] kmem_cache_free+0x10d/0x4d0 [ 31.225191] rcu_core+0x8c8/0x2860 [ 31.225628] __do_softirq+0x1b7/0x7d4 [ 31.226105] [ 31.226316] Last potentially related work creation: [ 31.226899] kasan_save_stack+0x22/0x50 [ 31.227402] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228613] remove_vma+0x139/0x170 [ 31.229079] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229654] do_vmi_munmap+0x1f1/0x2b0 [ 31.230156] __vm_munmap+0x138/0x3a0 [ 31.230636] __x64_sys_munmap+0x59/0x80 [ 31.231145] do_syscall_64+0x3f/0x90 [ 31.231635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232292] [ 31.232506] The buggy address belongs to the object at ffff888015e8f910 [ 31.232506] which belongs to the cache vm_area_struct of size 168 [ 31.234008] The buggy address is located 88 bytes inside of [ 31.234008] freed 168-byte region [ffff888015e8f910, ffff888015e8f9b8) [ 31.235416] [ 31.235634] The buggy address belongs to the physical page: [ 31.236293] page:0000000099546561 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e8f [ 31.237398] memcg:ffff88801305bd01 [ 31.237834] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.238497] page_type: 0xffffffff() [ 31.238955] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.239905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801305bd01 [ 31.240835] page dumped because: kasan: bad access detected [ 31.241534] [ 31.241754] Memory state around the buggy address: [ 31.242358] ffff888015e8f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.243236] ffff888015e8f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.244113] >ffff888015e8f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.244979] ^ [ 31.245808] ffff888015e8f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.246685] ffff888015e8fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.247547] ================================================================== [ 31.248578] Disabling lock debugging due to kernel taint [ 33.152661] BUG: Bad rss-counter state mm:000000002836eda9 type:MM_FILEPAGES val:33 [ 33.153630] BUG: Bad rss-counter state mm:000000002836eda9 type:MM_ANONPAGES val:22 [ 33.594172] BUG: Bad rss-counter state mm:00000000ab1f8c11 type:MM_FILEPAGES val:33 [ 33.595129] BUG: Bad rss-counter state mm:00000000ab1f8c11 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15332' (ECDSA) to the list of known hosts. 2023/06/20 15:08:28 fuzzer started 2023/06/20 15:08:29 dialing manager at localhost:36067 2023/06/20 15:08:29 checking machine... 2023/06/20 15:08:29 checking revisions... [ 34.356482] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:08:29 testing simple program... [ 34.398323] cgroup: Unknown subsys name 'net' [ 34.438679] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:08:28 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffff888016ac3438 RCX=0000000000000000 RDX=0000000000000084 RSI=0000000000000084 RDI=0000000000000005 RBP=ffff88800d03e100 RSP=ffff88800c447600 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800e308100 R13=ffff88800ff14000 R14=ffff88800ff14738 R15=ffff88800c447678 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f72f230c900 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=00007f72f1752ee0 CR3=0000000008c78000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d87cd8c8593e51dd00000000000ae988 XMM05=1e53542618f204ff0000000000134228 XMM06=c291bd5c70af25b90000000000133018 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81846194 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff11001295e36 RSI=ffffffff81846194 RDI=ffff8880094af220 RBP=ffff8880094af1f0 RSP=ffff8880094af150 R8 =ffffffff860d825a R9 =ffff8880094af198 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880094af220 R13=0000000000000000 R14=ffff888009c48000 R15=ffff888016e754c0 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007fd2c63b2900 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=00007fd2c6391020 CR3=0000000019f88000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000