syzkaller login: [ 35.302636] BUG: Bad rss-counter state mm:000000005d889069 type:MM_FILEPAGES val:33 [ 35.304342] BUG: Bad rss-counter state mm:000000005d889069 type:MM_ANONPAGES val:22 [ 35.473916] ================================================================== [ 35.474837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.475797] Read of size 8 at addr ffff88800fc373f8 by task sshd/219 [ 35.476568] [ 35.476887] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.477752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.478730] Call Trace: [ 35.479056] [ 35.479339] dump_stack_lvl+0x91/0xf0 [ 35.479888] print_report+0xcc/0x620 [ 35.480447] ? __virt_addr_valid+0x102/0x340 [ 35.481004] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.481616] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.482239] kasan_report+0xbe/0xf0 [ 35.482720] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.483342] vma_interval_tree_remove+0xc75/0xec0 [ 35.483969] vma_prepare+0xc54/0x11a0 [ 35.484450] __split_vma+0x5af/0x950 [ 35.484922] ? __pfx___split_vma+0x10/0x10 [ 35.485454] ? find_held_lock+0x2c/0x110 [ 35.485976] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.486546] ? lock_is_held_type+0x9f/0x120 [ 35.487093] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.487705] ? mtree_range_walk+0x632/0x900 [ 35.488257] ? mas_walk+0x5c7/0x7c0 [ 35.488735] do_vmi_munmap+0x1f1/0x2b0 [ 35.489234] mmap_region+0x1f9/0x2660 [ 35.489724] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.490231] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.490947] ? __pfx_lock_acquire+0x10/0x10 [ 35.491499] ? __pfx_mmap_region+0x10/0x10 [ 35.492041] ? security_mmap_addr+0x7d/0xa0 [ 35.492573] ? get_unmapped_area+0x1f5/0x3f0 [ 35.493121] do_mmap+0x854/0xf00 [ 35.493566] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.494061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.494624] ksys_mmap_pgoff+0x3af/0x500 [ 35.495134] do_syscall_64+0x3f/0x90 [ 35.495621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.496273] RIP: 0033:0x7f9744238d82 [ 35.496732] 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 [ 35.498866] RSP: 002b:00007ffda4297d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.499802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9744238d82 [ 35.500660] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9743672000 [ 35.501514] RBP: 00007f9743672000 R08: 0000000000000009 R09: 0000000000001000 [ 35.502388] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b57d38cf70 [ 35.503243] R13: 00007ffda4297da0 R14: 00007ffda4297dd0 R15: 00007ffda4298130 [ 35.504122] [ 35.504417] [ 35.504631] Allocated by task 212: [ 35.505068] kasan_save_stack+0x22/0x50 [ 35.505580] kasan_set_track+0x25/0x30 [ 35.506074] __kasan_slab_alloc+0x59/0x70 [ 35.506601] kmem_cache_alloc+0x16b/0x370 [ 35.507127] vm_area_dup+0x20/0x160 [ 35.507589] __split_vma+0x170/0x950 [ 35.508065] split_vma+0xc6/0x110 [ 35.508505] mprotect_fixup+0x8d2/0xb30 [ 35.509021] do_mprotect_pkey+0x87e/0xd40 [ 35.509548] __x64_sys_mprotect+0x78/0xc0 [ 35.510072] do_syscall_64+0x3f/0x90 [ 35.510552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.511201] [ 35.511438] Freed by task 19: [ 35.511825] kasan_save_stack+0x22/0x50 [ 35.512328] kasan_set_track+0x25/0x30 [ 35.512828] kasan_save_free_info+0x2b/0x50 [ 35.513363] __kasan_slab_free+0x10a/0x190 [ 35.513893] kmem_cache_free+0x10d/0x4d0 [ 35.514399] rcu_core+0x8c8/0x2860 [ 35.514847] __do_softirq+0x1b7/0x7d4 [ 35.515330] [ 35.515559] Last potentially related work creation: [ 35.516142] kasan_save_stack+0x22/0x50 [ 35.516648] __kasan_record_aux_stack+0x8e/0xa0 [ 35.517242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.517878] remove_vma+0x139/0x170 [ 35.518331] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.518884] do_vmi_munmap+0x1f1/0x2b0 [ 35.519367] __vm_munmap+0x138/0x3a0 [ 35.519858] __x64_sys_munmap+0x59/0x80 [ 35.520360] do_syscall_64+0x3f/0x90 [ 35.520842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.521494] [ 35.521708] The buggy address belongs to the object at ffff88800fc373a0 [ 35.521708] which belongs to the cache vm_area_struct of size 168 [ 35.523197] The buggy address is located 88 bytes inside of [ 35.523197] freed 168-byte region [ffff88800fc373a0, ffff88800fc37448) [ 35.524621] [ 35.524842] The buggy address belongs to the physical page: [ 35.525501] page:00000000267673a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc37 [ 35.526590] memcg:ffff88800ee1eb01 [ 35.527020] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.527685] page_type: 0xffffffff() [ 35.528134] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.529056] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee1eb01 [ 35.529967] page dumped because: kasan: bad access detected [ 35.530631] [ 35.530848] Memory state around the buggy address: [ 35.531454] ffff88800fc37280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.532323] ffff88800fc37300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.533181] >ffff88800fc37380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.534051] ^ [ 35.534899] ffff88800fc37400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.535774] ffff88800fc37480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.536636] ================================================================== [ 35.537621] Disabling lock debugging due to kernel taint [ 38.318333] BUG: Bad rss-counter state mm:00000000744ab2e2 type:MM_FILEPAGES val:33 [ 38.319334] BUG: Bad rss-counter state mm:00000000744ab2e2 type:MM_ANONPAGES val:22 [ 38.814837] BUG: Bad rss-counter state mm:0000000094a23ddd type:MM_FILEPAGES val:33 [ 38.815877] BUG: Bad rss-counter state mm:0000000094a23ddd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59278' (ECDSA) to the list of known hosts. 2023/06/20 16:38:32 fuzzer started 2023/06/20 16:38:32 dialing manager at localhost:36067 2023/06/20 16:38:32 checking machine... 2023/06/20 16:38:32 checking revisions... [ 39.554946] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:38:32 testing simple program... [ 39.606156] cgroup: Unknown subsys name 'net' [ 39.642119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:38:32 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=ffff8880098d0140 RCX=ffffffff8181f3f9 RDX=ffff88800ff01b40 RSI=0000000000000100 RDI=0000000000000006 RBP=00000000000025c9 RSP=ffff88806ce09c48 R8 =0000000000000006 R9 =0000000000000000 R10=00000000000025c9 R11=00000000000b6a61 R12=1ffff1100d9c138b R13=0000000000000000 R14=ffff8880098d01e0 R15=ffff8880098d0188 RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 00007fa622ef6700 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=00007fc4fca3fc08 CR3=000000000d8d4000 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=2031333a38333a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38333a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff11001f96e20 RSI=ffffffff8180ce89 RDI=ffff88800fcb6fb8 RBP=ffff88800fcb7050 RSP=ffff88800fcb6fb8 R8 =ffffffff86138eb4 R9 =ffff88800fcb6ff8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800fcb7080 R13=0000000000000000 R14=ffff888019901b40 R15=0000000000092800 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 00007fa677fbc900 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=00007fa677f81008 CR3=000000001cdfa000 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