syzkaller login: [ 30.989067] BUG: Bad rss-counter state mm:00000000e9cc9c50 type:MM_FILEPAGES val:33 [ 30.990063] BUG: Bad rss-counter state mm:00000000e9cc9c50 type:MM_ANONPAGES val:22 [ 31.151055] ================================================================== [ 31.152117] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.153222] Read of size 8 at addr ffff8880103756b0 by task sshd/221 [ 31.154313] [ 31.154571] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.155603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.156865] Call Trace: [ 31.157253] [ 31.157593] dump_stack_lvl+0x91/0xf0 [ 31.158201] print_report+0xcc/0x620 [ 31.158800] ? __virt_addr_valid+0x102/0x340 [ 31.159457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160190] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160939] kasan_report+0xbe/0xf0 [ 31.161530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162353] vma_interval_tree_remove+0xc75/0xec0 [ 31.163112] vma_prepare+0xc54/0x11a0 [ 31.163711] __split_vma+0x5af/0x950 [ 31.164300] ? __pfx___split_vma+0x10/0x10 [ 31.164948] ? find_held_lock+0x2c/0x110 [ 31.165588] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.166339] ? lock_is_held_type+0x9f/0x120 [ 31.166934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.167542] ? mtree_range_walk+0x632/0x900 [ 31.168091] ? mas_walk+0x5c7/0x7c0 [ 31.168587] do_vmi_munmap+0x1f1/0x2b0 [ 31.169084] mmap_region+0x1f9/0x2660 [ 31.169574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.170081] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.170821] ? __pfx_lock_acquire+0x10/0x10 [ 31.171361] ? __pfx_mmap_region+0x10/0x10 [ 31.171892] ? security_mmap_addr+0x7d/0xa0 [ 31.172426] ? get_unmapped_area+0x1f5/0x3f0 [ 31.172977] do_mmap+0x854/0xf00 [ 31.173418] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.173919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.174520] ksys_mmap_pgoff+0x3af/0x500 [ 31.175022] do_syscall_64+0x3f/0x90 [ 31.175502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176145] RIP: 0033:0x7fb05fe3ad82 [ 31.176601] 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 [ 31.178768] RSP: 002b:00007ffc7ea1dc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.179674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb05fe3ad82 [ 31.180529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb05f274000 [ 31.181423] RBP: 00007fb05f274000 R08: 0000000000000009 R09: 0000000000001000 [ 31.182329] R10: 0000000000000812 R11: 0000000000000206 R12: 000056370d3ffec0 [ 31.183176] R13: 00007ffc7ea1dca0 R14: 00007ffc7ea1dcd0 R15: 00007ffc7ea1e030 [ 31.184041] [ 31.184336] [ 31.184559] Allocated by task 214: [ 31.184995] kasan_save_stack+0x22/0x50 [ 31.185501] kasan_set_track+0x25/0x30 [ 31.185997] __kasan_slab_alloc+0x59/0x70 [ 31.186553] kmem_cache_alloc+0x16b/0x370 [ 31.187068] vm_area_dup+0x20/0x160 [ 31.187522] __split_vma+0x170/0x950 [ 31.187986] split_vma+0xc6/0x110 [ 31.188425] mprotect_fixup+0x8d2/0xb30 [ 31.188926] do_mprotect_pkey+0x87e/0xd40 [ 31.189444] __x64_sys_mprotect+0x78/0xc0 [ 31.189971] do_syscall_64+0x3f/0x90 [ 31.190492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.191148] [ 31.191366] Freed by task 214: [ 31.191767] kasan_save_stack+0x22/0x50 [ 31.192281] kasan_set_track+0x25/0x30 [ 31.192787] kasan_save_free_info+0x2b/0x50 [ 31.193323] __kasan_slab_free+0x10a/0x190 [ 31.193868] kmem_cache_free+0x10d/0x4d0 [ 31.194416] rcu_core+0x8c8/0x2860 [ 31.194908] __do_softirq+0x1b7/0x7d4 [ 31.195386] [ 31.195600] Last potentially related work creation: [ 31.196191] kasan_save_stack+0x22/0x50 [ 31.196702] __kasan_record_aux_stack+0x8e/0xa0 [ 31.197277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.197919] remove_vma+0x139/0x170 [ 31.198426] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.198986] do_vmi_munmap+0x1f1/0x2b0 [ 31.199474] __vm_munmap+0x138/0x3a0 [ 31.199949] __x64_sys_munmap+0x59/0x80 [ 31.200443] do_syscall_64+0x3f/0x90 [ 31.200927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201574] [ 31.201796] The buggy address belongs to the object at ffff888010375658 [ 31.201796] which belongs to the cache vm_area_struct of size 168 [ 31.203283] The buggy address is located 88 bytes inside of [ 31.203283] freed 168-byte region [ffff888010375658, ffff888010375700) [ 31.204675] [ 31.204898] The buggy address belongs to the physical page: [ 31.205554] page:0000000016dae11e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10375 [ 31.206673] memcg:ffff88800c676501 [ 31.207098] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.207792] page_type: 0xffffffff() [ 31.208246] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383ac0 dead000000000007 [ 31.209174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c676501 [ 31.210072] page dumped because: kasan: bad access detected [ 31.210787] [ 31.211006] Memory state around the buggy address: [ 31.211582] ffff888010375580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.212447] ffff888010375600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.213298] >ffff888010375680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.214146] ^ [ 31.214763] ffff888010375700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.215618] ffff888010375780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.216470] ================================================================== [ 31.217384] Disabling lock debugging due to kernel taint [ 33.200439] BUG: Bad rss-counter state mm:00000000acbf6c31 type:MM_FILEPAGES val:33 [ 33.201570] BUG: Bad rss-counter state mm:00000000acbf6c31 type:MM_ANONPAGES val:22 [ 33.657066] BUG: Bad rss-counter state mm:000000006a9e4548 type:MM_FILEPAGES val:33 [ 33.658286] BUG: Bad rss-counter state mm:000000006a9e4548 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14955' (ECDSA) to the list of known hosts. 2023/06/21 01:22:26 fuzzer started 2023/06/21 01:22:26 dialing manager at localhost:36067 2023/06/21 01:22:26 checking machine... 2023/06/21 01:22:26 checking revisions... [ 34.304976] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:22:27 testing simple program... [ 34.353395] cgroup: Unknown subsys name 'net' [ 34.391378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:22:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8162a5b7 RDX=ffff88800dba9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016a9f8f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888019333668 R13=dffffc0000000000 R14=0000000000000002 R15=ffff888016a9f938 RIP=ffffffff814c027c 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 00007fcf827e7900 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=00007ffd45d19000 CR3=000000000cbe4000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 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=00007f6ec85ac4e0 CR3=0000000008cc8000 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=1efac2d7be7bb7af5b4cac8504b82566 XMM02=000000000011b1d8ec2efd57dc4c00df XMM03=0000000000121ee02830ad36efc0aa9f XMM04=6266e76dc857770a00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131db8 XMM06=c291bd5c70af25b90000000000131c40 XMM07=e042d86d42eb936e0000000000122160 XMM08=2830ad36efc0aa9f000000000011b238 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000