syzkaller login: [ 31.388108] BUG: Bad rss-counter state mm:00000000cc533f0e type:MM_FILEPAGES val:33 [ 31.389185] BUG: Bad rss-counter state mm:00000000cc533f0e type:MM_ANONPAGES val:22 [ 31.552127] ================================================================== [ 31.553202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.554307] Read of size 8 at addr ffff88800f1e84e0 by task sshd/221 [ 31.555096] [ 31.555317] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.556189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.557202] Call Trace: [ 31.557535] [ 31.557824] dump_stack_lvl+0x91/0xf0 [ 31.558329] print_report+0xcc/0x620 [ 31.558819] ? __virt_addr_valid+0x102/0x340 [ 31.559370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.559989] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.560610] kasan_report+0xbe/0xf0 [ 31.561101] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.561742] vma_interval_tree_remove+0xc75/0xec0 [ 31.562351] vma_prepare+0xc54/0x11a0 [ 31.562826] __split_vma+0x5af/0x950 [ 31.563291] ? __pfx___split_vma+0x10/0x10 [ 31.563815] ? find_held_lock+0x2c/0x110 [ 31.564337] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.564905] ? lock_is_held_type+0x9f/0x120 [ 31.565477] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.566079] ? mtree_range_walk+0x632/0x900 [ 31.566628] ? mas_walk+0x5c7/0x7c0 [ 31.567117] do_vmi_munmap+0x1f1/0x2b0 [ 31.567612] mmap_region+0x1f9/0x2660 [ 31.568097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.568609] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.569329] ? __pfx_lock_acquire+0x10/0x10 [ 31.569857] ? __pfx_mmap_region+0x10/0x10 [ 31.570383] ? security_mmap_addr+0x7d/0xa0 [ 31.570908] ? get_unmapped_area+0x1f5/0x3f0 [ 31.571462] do_mmap+0x854/0xf00 [ 31.571898] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.572393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.572977] ksys_mmap_pgoff+0x3af/0x500 [ 31.573502] do_syscall_64+0x3f/0x90 [ 31.573999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.574651] RIP: 0033:0x7f267fa70d82 [ 31.575108] 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 [ 31.577243] RSP: 002b:00007ffd60ac8a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.578148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f267fa70d82 [ 31.578997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f267eeaa000 [ 31.579884] RBP: 00007f267eeaa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.580725] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630b4dccb20 [ 31.581582] R13: 00007ffd60ac8aa0 R14: 00007ffd60ac8ad0 R15: 00007ffd60ac8e30 [ 31.582439] [ 31.582727] [ 31.582940] Allocated by task 214: [ 31.583363] kasan_save_stack+0x22/0x50 [ 31.583862] kasan_set_track+0x25/0x30 [ 31.584357] __kasan_slab_alloc+0x59/0x70 [ 31.584900] kmem_cache_alloc+0x16b/0x370 [ 31.585433] vm_area_dup+0x20/0x160 [ 31.585890] __split_vma+0x170/0x950 [ 31.586355] split_vma+0xc6/0x110 [ 31.586793] mprotect_fixup+0x8d2/0xb30 [ 31.587292] do_mprotect_pkey+0x87e/0xd40 [ 31.587813] __x64_sys_mprotect+0x78/0xc0 [ 31.588332] do_syscall_64+0x3f/0x90 [ 31.588813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589470] [ 31.589683] Freed by task 214: [ 31.590074] kasan_save_stack+0x22/0x50 [ 31.590574] kasan_set_track+0x25/0x30 [ 31.591081] kasan_save_free_info+0x2b/0x50 [ 31.591641] __kasan_slab_free+0x10a/0x190 [ 31.592200] kmem_cache_free+0x10d/0x4d0 [ 31.592713] rcu_core+0x8c8/0x2860 [ 31.593180] __do_softirq+0x1b7/0x7d4 [ 31.593658] [ 31.593871] Last potentially related work creation: [ 31.594570] kasan_save_stack+0x22/0x50 [ 31.595086] __kasan_record_aux_stack+0x8e/0xa0 [ 31.595660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.596302] remove_vma+0x139/0x170 [ 31.596758] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.597332] do_vmi_munmap+0x1f1/0x2b0 [ 31.597824] __vm_munmap+0x138/0x3a0 [ 31.598289] __x64_sys_munmap+0x59/0x80 [ 31.598787] do_syscall_64+0x3f/0x90 [ 31.599262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.599918] [ 31.600133] The buggy address belongs to the object at ffff88800f1e8488 [ 31.600133] which belongs to the cache vm_area_struct of size 168 [ 31.601610] The buggy address is located 88 bytes inside of [ 31.601610] freed 168-byte region [ffff88800f1e8488, ffff88800f1e8530) [ 31.603058] [ 31.603288] The buggy address belongs to the physical page: [ 31.603973] page:00000000e7c73680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1e8 [ 31.605091] memcg:ffff88800dff4301 [ 31.605521] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.606171] page_type: 0xffffffff() [ 31.606619] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.607554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dff4301 [ 31.608462] page dumped because: kasan: bad access detected [ 31.609131] [ 31.609365] Memory state around the buggy address: [ 31.609970] ffff88800f1e8380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.610834] ffff88800f1e8400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.611712] >ffff88800f1e8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.612598] ^ [ 31.613387] ffff88800f1e8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.614288] ffff88800f1e8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.615175] ================================================================== [ 31.616159] Disabling lock debugging due to kernel taint [ 33.645683] BUG: Bad rss-counter state mm:00000000add3d96a type:MM_FILEPAGES val:33 [ 33.646868] BUG: Bad rss-counter state mm:00000000add3d96a type:MM_ANONPAGES val:22 [ 34.031910] BUG: Bad rss-counter state mm:00000000ce680544 type:MM_FILEPAGES val:33 [ 34.032856] BUG: Bad rss-counter state mm:00000000ce680544 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48614' (ECDSA) to the list of known hosts. 2023/06/20 16:11:54 fuzzer started 2023/06/20 16:11:55 dialing manager at localhost:36067 2023/06/20 16:11:55 checking machine... 2023/06/20 16:11:55 checking revisions... [ 34.754828] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:11:55 testing simple program... [ 34.803202] cgroup: Unknown subsys name 'net' [ 34.862687] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:11:54 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=00007f16384dd650 CR3=000000000ee02000 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=2034353a31313a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31313a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09cf0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8562be48 RBP=0000000000000001 RSP=ffff88806cf09ce0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8562be48 R15=0000000000000000 RIP=ffffffff812d8e97 RFL=00000082 [--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 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=00007f2b3828cf70 CR3=000000000c5ee000 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=e60ab21da6b384bcd74d4983edc10d06 XMM02=000000000011c980eff9b2d0a8fce9cb XMM03=000000000011ca502c67c8bc2e329bc3 XMM04=124ed68405eccf0800000000000ae988 XMM05=e4cb8bb95a7664b60000000000133120 XMM06=1ee3b7300799a8680000000000131f88 XMM07=e042d86d42eb936e0000000000123528 XMM08=55e8324054d91b7e000000000011ca50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000