syzkaller login: [ 38.696202] BUG: Bad rss-counter state mm:0000000030e01dc9 type:MM_FILEPAGES val:33 [ 38.697493] BUG: Bad rss-counter state mm:0000000030e01dc9 type:MM_ANONPAGES val:22 [ 38.809707] ================================================================== [ 38.810781] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.811921] Read of size 8 at addr ffff888016786310 by task sshd/221 [ 38.812857] [ 38.813216] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.814299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.815491] Call Trace: [ 38.815874] [ 38.816212] dump_stack_lvl+0x91/0xf0 [ 38.816811] print_report+0xcc/0x620 [ 38.817404] ? __virt_addr_valid+0x102/0x340 [ 38.818065] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.818820] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.819568] kasan_report+0xbe/0xf0 [ 38.819857] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.820223] vma_interval_tree_remove+0xc75/0xec0 [ 38.820577] vma_prepare+0xc54/0x11a0 [ 38.820865] __split_vma+0x5af/0x950 [ 38.821154] ? __pfx___split_vma+0x10/0x10 [ 38.821468] ? find_held_lock+0x2c/0x110 [ 38.821775] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.822108] ? lock_is_held_type+0x9f/0x120 [ 38.822436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.822797] ? mtree_range_walk+0x632/0x900 [ 38.823137] ? mas_walk+0x5c7/0x7c0 [ 38.823418] do_vmi_munmap+0x1f1/0x2b0 [ 38.823709] mmap_region+0x1f9/0x2660 [ 38.824002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.824317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.824747] ? __pfx_lock_acquire+0x10/0x10 [ 38.825071] ? __pfx_mmap_region+0x10/0x10 [ 38.825386] ? security_mmap_addr+0x7d/0xa0 [ 38.825715] ? get_unmapped_area+0x1f5/0x3f0 [ 38.826041] do_mmap+0x854/0xf00 [ 38.826312] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.826609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.826945] ksys_mmap_pgoff+0x3af/0x500 [ 38.827255] do_syscall_64+0x3f/0x90 [ 38.827540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.827930] RIP: 0033:0x7f4c35635d82 [ 38.828207] 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 [ 38.829490] RSP: 002b:00007ffeb7fdf518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.830046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c35635d82 [ 38.830563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c34a6f000 [ 38.831089] RBP: 00007f4c34a6f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.831614] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590b3c53ec0 [ 38.832130] R13: 00007ffeb7fdf530 R14: 00007ffeb7fdf560 R15: 00007ffeb7fdf8c0 [ 38.832648] [ 38.832820] [ 38.832950] Allocated by task 214: [ 38.833209] kasan_save_stack+0x22/0x50 [ 38.833510] kasan_set_track+0x25/0x30 [ 38.833801] __kasan_slab_alloc+0x59/0x70 [ 38.834113] kmem_cache_alloc+0x16b/0x370 [ 38.834425] vm_area_dup+0x20/0x160 [ 38.834693] __split_vma+0x170/0x950 [ 38.834973] split_vma+0xc6/0x110 [ 38.835283] mprotect_fixup+0x8d2/0xb30 [ 38.835575] do_mprotect_pkey+0x87e/0xd40 [ 38.835885] __x64_sys_mprotect+0x78/0xc0 [ 38.836193] do_syscall_64+0x3f/0x90 [ 38.836470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.836857] [ 38.836987] Freed by task 214: [ 38.837221] kasan_save_stack+0x22/0x50 [ 38.837521] kasan_set_track+0x25/0x30 [ 38.837822] kasan_save_free_info+0x2b/0x50 [ 38.838129] __kasan_slab_free+0x10a/0x190 [ 38.838449] kmem_cache_free+0x10d/0x4d0 [ 38.838744] rcu_core+0x8c8/0x2860 [ 38.839013] __do_softirq+0x1b7/0x7d4 [ 38.839317] [ 38.839449] Last potentially related work creation: [ 38.839794] kasan_save_stack+0x22/0x50 [ 38.840098] __kasan_record_aux_stack+0x8e/0xa0 [ 38.840439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.840828] remove_vma+0x139/0x170 [ 38.841101] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.841442] do_vmi_munmap+0x1f1/0x2b0 [ 38.841739] __vm_munmap+0x138/0x3a0 [ 38.842015] __x64_sys_munmap+0x59/0x80 [ 38.842312] do_syscall_64+0x3f/0x90 [ 38.842594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.842980] [ 38.843115] The buggy address belongs to the object at ffff8880167862b8 [ 38.843115] which belongs to the cache vm_area_struct of size 168 [ 38.843993] The buggy address is located 88 bytes inside of [ 38.843993] freed 168-byte region [ffff8880167862b8, ffff888016786360) [ 38.844831] [ 38.844959] The buggy address belongs to the physical page: [ 38.845344] page:00000000a0a7ac34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16786 [ 38.846002] memcg:ffff88800df28701 [ 38.846258] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.846686] page_type: 0xffffffff() [ 38.846945] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392140 dead000000000007 [ 38.847500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df28701 [ 38.848043] page dumped because: kasan: bad access detected [ 38.848438] [ 38.848566] Memory state around the buggy address: [ 38.848908] ffff888016786200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.849420] ffff888016786280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.849948] >ffff888016786300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.850452] ^ [ 38.850725] ffff888016786380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.851248] ffff888016786400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.851757] ================================================================== [ 38.852420] Disabling lock debugging due to kernel taint [ 40.846398] BUG: Bad rss-counter state mm:000000004eef687f type:MM_FILEPAGES val:33 [ 40.847453] BUG: Bad rss-counter state mm:000000004eef687f type:MM_ANONPAGES val:22 [ 41.354168] BUG: Bad rss-counter state mm:00000000c57ecb78 type:MM_FILEPAGES val:33 [ 41.355231] BUG: Bad rss-counter state mm:00000000c57ecb78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51092' (ECDSA) to the list of known hosts. 2023/06/20 18:54:54 fuzzer started 2023/06/20 18:54:54 dialing manager at localhost:36067 2023/06/20 18:54:54 checking machine... 2023/06/20 18:54:54 checking revisions... [ 42.021868] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:54:54 testing simple program... [ 42.077703] cgroup: Unknown subsys name 'net' [ 42.114079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:54:54 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11002071ea0 RSI=ffffffff8180c705 RDI=ffff88801038f570 RBP=ffff88801038f540 RSP=ffff88801038f4a0 R8 =ffffffff86138e90 R9 =ffff88801038f4e8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801038f570 R13=0000000000000000 R14=ffff888010390000 R15=0000000000000000 RIP=ffffffff813ad470 RFL=00000286 [--S--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 00007f015ba52900 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=00007f015aeb2e80 CR3=0000000009a3c000 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=49f607fb3eeadce300000000000ae988 XMM05=bf98739dfcae20b30000000000132e50 XMM06=59d5b690e0af863b0000000000131978 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=0000000000000002 RCX=0000000000000000 RDX=ffff88800cd73680 RSI=0000000000000002 RDI=0000000000000000 RBP=1ffff11002be1f50 RSP=ffff888015f0fa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=00000000000b6a61 R12=ffff888008f65000 R13=ffff888008f65080 R14=ffffffff87f97640 R15=ffff888015f0faa0 RIP=ffffffff814c0404 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 00007f6c34bfe900 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=00007fffb1551000 CR3=000000000f266000 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