syzkaller login: [ 31.044076] BUG: Bad rss-counter state mm:00000000c5e41421 type:MM_FILEPAGES val:33 [ 31.044721] BUG: Bad rss-counter state mm:00000000c5e41421 type:MM_ANONPAGES val:22 [ 31.158426] ================================================================== [ 31.159013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.159627] Read of size 8 at addr ffff88800f5e74e0 by task sshd/221 [ 31.160127] [ 31.160265] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.160800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.161419] Call Trace: [ 31.161623] [ 31.161806] dump_stack_lvl+0x91/0xf0 [ 31.162115] print_report+0xcc/0x620 [ 31.162419] ? __virt_addr_valid+0x102/0x340 [ 31.162775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163168] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.163657] kasan_report+0xbe/0xf0 [ 31.163964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.164364] vma_interval_tree_remove+0xc75/0xec0 [ 31.164755] vma_prepare+0xc54/0x11a0 [ 31.165056] __split_vma+0x5af/0x950 [ 31.165357] ? __pfx___split_vma+0x10/0x10 [ 31.165699] ? find_held_lock+0x2c/0x110 [ 31.166032] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.166395] ? lock_is_held_type+0x9f/0x120 [ 31.166741] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.167128] ? mtree_range_walk+0x632/0x900 [ 31.167475] ? mas_walk+0x5c7/0x7c0 [ 31.167778] do_vmi_munmap+0x1f1/0x2b0 [ 31.168098] mmap_region+0x1f9/0x2660 [ 31.168403] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.168725] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.169177] ? __pfx_lock_acquire+0x10/0x10 [ 31.169514] ? __pfx_mmap_region+0x10/0x10 [ 31.169855] ? security_mmap_addr+0x7d/0xa0 [ 31.170190] ? get_unmapped_area+0x1f5/0x3f0 [ 31.170541] do_mmap+0x854/0xf00 [ 31.170823] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.171137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.171492] ksys_mmap_pgoff+0x3af/0x500 [ 31.171810] do_syscall_64+0x3f/0x90 [ 31.172121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172536] RIP: 0033:0x7fdce7160d82 [ 31.172826] 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 [ 31.174207] RSP: 002b:00007ffd50610e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.174782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdce7160d82 [ 31.175327] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdce659a000 [ 31.175862] RBP: 00007fdce659a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.176444] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae083e7f70 [ 31.176986] R13: 00007ffd50610e20 R14: 00007ffd50610e50 R15: 00007ffd506111b0 [ 31.177544] [ 31.177729] [ 31.177863] Allocated by task 214: [ 31.178135] kasan_save_stack+0x22/0x50 [ 31.178459] kasan_set_track+0x25/0x30 [ 31.178775] __kasan_slab_alloc+0x59/0x70 [ 31.179109] kmem_cache_alloc+0x16b/0x370 [ 31.179440] vm_area_dup+0x20/0x160 [ 31.179726] __split_vma+0x170/0x950 [ 31.180039] split_vma+0xc6/0x110 [ 31.180314] mprotect_fixup+0x8d2/0xb30 [ 31.180628] do_mprotect_pkey+0x87e/0xd40 [ 31.180956] __x64_sys_mprotect+0x78/0xc0 [ 31.181287] do_syscall_64+0x3f/0x90 [ 31.181585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181988] [ 31.182123] Freed by task 214: [ 31.182376] kasan_save_stack+0x22/0x50 [ 31.182699] kasan_set_track+0x25/0x30 [ 31.183015] kasan_save_free_info+0x2b/0x50 [ 31.183350] __kasan_slab_free+0x10a/0x190 [ 31.183684] kmem_cache_free+0x10d/0x4d0 [ 31.184015] rcu_core+0x8c8/0x2860 [ 31.184294] __do_softirq+0x1b7/0x7d4 [ 31.184599] [ 31.184737] Last potentially related work creation: [ 31.185115] kasan_save_stack+0x22/0x50 [ 31.185432] __kasan_record_aux_stack+0x8e/0xa0 [ 31.185799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.186220] remove_vma+0x139/0x170 [ 31.186511] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.186871] do_vmi_munmap+0x1f1/0x2b0 [ 31.187179] __vm_munmap+0x138/0x3a0 [ 31.187484] __x64_sys_munmap+0x59/0x80 [ 31.187806] do_syscall_64+0x3f/0x90 [ 31.188124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188541] [ 31.188673] The buggy address belongs to the object at ffff88800f5e7488 [ 31.188673] which belongs to the cache vm_area_struct of size 168 [ 31.189640] The buggy address is located 88 bytes inside of [ 31.189640] freed 168-byte region [ffff88800f5e7488, ffff88800f5e7530) [ 31.190547] [ 31.190683] The buggy address belongs to the physical page: [ 31.191110] page:00000000ad9e76e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5e7 [ 31.191830] memcg:ffff8880197f8a01 [ 31.192107] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.192527] page_type: 0xffffffff() [ 31.192819] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.193424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197f8a01 [ 31.194009] page dumped because: kasan: bad access detected [ 31.194446] [ 31.194580] Memory state around the buggy address: [ 31.194949] ffff88800f5e7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.195516] ffff88800f5e7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.196095] >ffff88800f5e7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196652] ^ [ 31.197146] ffff88800f5e7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.197710] ffff88800f5e7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.198263] ================================================================== [ 31.198878] Disabling lock debugging due to kernel taint [ 34.268488] BUG: Bad rss-counter state mm:00000000ff38cf5e type:MM_FILEPAGES val:33 [ 34.269796] BUG: Bad rss-counter state mm:00000000ff38cf5e type:MM_ANONPAGES val:22 [ 34.715792] BUG: Bad rss-counter state mm:00000000781366a4 type:MM_FILEPAGES val:33 [ 34.716823] BUG: Bad rss-counter state mm:00000000781366a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20021' (ECDSA) to the list of known hosts. 2023/06/20 11:02:39 fuzzer started 2023/06/20 11:02:40 dialing manager at localhost:36067 2023/06/20 11:02:40 checking machine... 2023/06/20 11:02:40 checking revisions... [ 35.511064] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:02:40 testing simple program... [ 35.565812] cgroup: Unknown subsys name 'net' [ 35.623302] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:02:39 Registers: info registers vcpu 0 RAX=1ffff1100337531d RBX=ffff888019ba98b8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019ba98e8 RBP=ffff88801b40c828 RSP=ffff888016847d08 R8 =0000000000000001 R9 =ffffed1002d08f95 R10=0000000000000003 R11=00000000000b6d7d R12=dffffc0000000000 R13=ffff88801b419a40 R14=ffffffff818d9c06 R15=ffff88800de3fc00 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f5847d2f900 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=00007f58482e4650 CR3=000000000e962000 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=6562206f742072657375206568742023 XMM01=66206568742073612064657373617028 XMM02=00000000000000000000000000000000 XMM03=73657909454d4f485f544c5541464544 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=6f6d657220646c756f68732074492023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffdd8a78838 CR3=0000000016a6c000 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=2039333a32303a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a32303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000