syzkaller login: [ 30.768188] BUG: Bad rss-counter state mm:0000000036b685fe type:MM_FILEPAGES val:33 [ 30.769220] BUG: Bad rss-counter state mm:0000000036b685fe type:MM_ANONPAGES val:22 [ 30.812690] ================================================================== [ 30.813538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.814419] Read of size 8 at addr ffff8880159e7b38 by task sshd/219 [ 30.815139] [ 30.815372] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.816221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.817145] Call Trace: [ 30.817448] [ 30.817717] dump_stack_lvl+0x91/0xf0 [ 30.818196] print_report+0xcc/0x620 [ 30.818658] ? __virt_addr_valid+0x102/0x340 [ 30.819181] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819782] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820405] kasan_report+0xbe/0xf0 [ 30.820861] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821446] vma_interval_tree_remove+0xc75/0xec0 [ 30.822035] vma_prepare+0xc54/0x11a0 [ 30.822516] __split_vma+0x5af/0x950 [ 30.822989] ? __pfx___split_vma+0x10/0x10 [ 30.823549] ? find_held_lock+0x2c/0x110 [ 30.824120] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824691] ? lock_is_held_type+0x9f/0x120 [ 30.825225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.825834] ? mtree_range_walk+0x632/0x900 [ 30.826383] ? mas_walk+0x5c7/0x7c0 [ 30.826861] do_vmi_munmap+0x1f1/0x2b0 [ 30.827358] mmap_region+0x1f9/0x2660 [ 30.827830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.828385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829086] ? __pfx_lock_acquire+0x10/0x10 [ 30.829621] ? __pfx_mmap_region+0x10/0x10 [ 30.830146] ? security_mmap_addr+0x7d/0xa0 [ 30.830677] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831244] do_mmap+0x854/0xf00 [ 30.831684] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832767] ksys_mmap_pgoff+0x3af/0x500 [ 30.833273] do_syscall_64+0x3f/0x90 [ 30.833744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834391] RIP: 0033:0x7f5105c24d82 [ 30.834835] 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 [ 30.836993] RSP: 002b:00007fff8f4f23e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5105c24d82 [ 30.838738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f510505e000 [ 30.839601] RBP: 00007f510505e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.840493] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557142fd6d90 [ 30.841330] R13: 00007fff8f4f2400 R14: 00007fff8f4f2430 R15: 00007fff8f4f2790 [ 30.842174] [ 30.842462] [ 30.842674] Allocated by task 212: [ 30.843091] kasan_save_stack+0x22/0x50 [ 30.843630] kasan_set_track+0x25/0x30 [ 30.844168] __kasan_slab_alloc+0x59/0x70 [ 30.844700] kmem_cache_alloc+0x16b/0x370 [ 30.845208] vm_area_dup+0x20/0x160 [ 30.845658] __split_vma+0x170/0x950 [ 30.846127] split_vma+0xc6/0x110 [ 30.846564] mprotect_fixup+0x8d2/0xb30 [ 30.847061] do_mprotect_pkey+0x87e/0xd40 [ 30.847592] __x64_sys_mprotect+0x78/0xc0 [ 30.848156] do_syscall_64+0x3f/0x90 [ 30.848635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849260] [ 30.849472] Freed by task 212: [ 30.849852] kasan_save_stack+0x22/0x50 [ 30.850349] kasan_set_track+0x25/0x30 [ 30.850830] kasan_save_free_info+0x2b/0x50 [ 30.851438] __kasan_slab_free+0x10a/0x190 [ 30.852001] kmem_cache_free+0x10d/0x4d0 [ 30.852520] rcu_core+0x8c8/0x2860 [ 30.852960] __do_softirq+0x1b7/0x7d4 [ 30.853435] [ 30.853648] Last potentially related work creation: [ 30.854229] kasan_save_stack+0x22/0x50 [ 30.854734] __kasan_record_aux_stack+0x8e/0xa0 [ 30.855319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855981] remove_vma+0x139/0x170 [ 30.856445] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.857002] do_vmi_munmap+0x1f1/0x2b0 [ 30.857492] __vm_munmap+0x138/0x3a0 [ 30.857952] __x64_sys_munmap+0x59/0x80 [ 30.858446] do_syscall_64+0x3f/0x90 [ 30.858930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859577] [ 30.859791] The buggy address belongs to the object at ffff8880159e7ae0 [ 30.859791] which belongs to the cache vm_area_struct of size 168 [ 30.861295] The buggy address is located 88 bytes inside of [ 30.861295] freed 168-byte region [ffff8880159e7ae0, ffff8880159e7b88) [ 30.862681] [ 30.862899] The buggy address belongs to the physical page: [ 30.863584] page:00000000f938cfcb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159e7 [ 30.864697] memcg:ffff8880197d6f01 [ 30.865116] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.865766] page_type: 0xffffffff() [ 30.866211] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.867123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197d6f01 [ 30.868094] page dumped because: kasan: bad access detected [ 30.868761] [ 30.868972] Memory state around the buggy address: [ 30.869554] ffff8880159e7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.870398] ffff8880159e7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.871255] >ffff8880159e7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.872155] ^ [ 30.872755] ffff8880159e7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.873614] ffff8880159e7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.874463] ================================================================== [ 30.875394] Disabling lock debugging due to kernel taint [ 32.862608] BUG: Bad rss-counter state mm:0000000069b0270f type:MM_FILEPAGES val:33 [ 32.863701] BUG: Bad rss-counter state mm:0000000069b0270f type:MM_ANONPAGES val:22 [ 33.291200] BUG: Bad rss-counter state mm:00000000d0614cdd type:MM_FILEPAGES val:33 [ 33.292292] BUG: Bad rss-counter state mm:00000000d0614cdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60483' (ECDSA) to the list of known hosts. 2023/06/21 01:48:43 fuzzer started 2023/06/21 01:48:43 dialing manager at localhost:36067 2023/06/21 01:48:43 checking machine... 2023/06/21 01:48:43 checking revisions... [ 34.032925] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:48:43 testing simple program... [ 34.079223] cgroup: Unknown subsys name 'net' [ 34.116311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:48:43 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=00007f96e4b017e0 CR3=000000000c7a6000 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=00000000000000000000000000000000 XMM01=34674f55fe1c3eae884e75515da68240 XMM02=000000000011a920eff9b2d0a8fce9cb XMM03=000000000011a9f02c67c8bc2e329bc3 XMM04=1abe9256f6b7b1fa00000000000ae988 XMM05=f2ee9ba5766e0aee0000000000132a50 XMM06=806171799158d9670000000000131af0 XMM07=e042d86d42eb936e00000000001220b0 XMM08=c834f5b9072bb7bd000000000011a9f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100393df14 RSI=ffffffff8180ce89 RDI=ffff88801c9ef910 RBP=ffff88801c9ef8e0 RSP=ffff88801c9ef840 R8 =ffffffff86138eb4 R9 =ffff88801c9ef888 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801c9ef910 R13=0000000000000000 R14=ffff888015851b40 R15=0000000000092cc0 RIP=ffffffff813ad47e 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 00007ff0b4bcc900 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=00007ffd633d0000 CR3=00000000158b0000 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