syzkaller login: [ 31.036581] BUG: Bad rss-counter state mm:0000000007ce90ae type:MM_FILEPAGES val:33 [ 31.038370] BUG: Bad rss-counter state mm:0000000007ce90ae type:MM_ANONPAGES val:22 [ 31.203884] ================================================================== [ 31.204812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.205782] Read of size 8 at addr ffff888010344140 by task sshd/221 [ 31.206565] [ 31.206866] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.207758] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208807] Call Trace: [ 31.209124] [ 31.209407] dump_stack_lvl+0x91/0xf0 [ 31.209906] print_report+0xcc/0x620 [ 31.210395] ? __virt_addr_valid+0x102/0x340 [ 31.210946] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211566] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212191] kasan_report+0xbe/0xf0 [ 31.212692] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213318] vma_interval_tree_remove+0xc75/0xec0 [ 31.213919] vma_prepare+0xc54/0x11a0 [ 31.214399] __split_vma+0x5af/0x950 [ 31.214879] ? __pfx___split_vma+0x10/0x10 [ 31.215413] ? find_held_lock+0x2c/0x110 [ 31.215936] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.216512] ? lock_is_held_type+0x9f/0x120 [ 31.217062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.217665] ? mtree_range_walk+0x632/0x900 [ 31.218217] ? mas_walk+0x5c7/0x7c0 [ 31.218700] do_vmi_munmap+0x1f1/0x2b0 [ 31.219191] mmap_region+0x1f9/0x2660 [ 31.219675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.220181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220910] ? __pfx_lock_acquire+0x10/0x10 [ 31.221440] ? __pfx_mmap_region+0x10/0x10 [ 31.221968] ? security_mmap_addr+0x7d/0xa0 [ 31.222497] ? get_unmapped_area+0x1f5/0x3f0 [ 31.223041] do_mmap+0x854/0xf00 [ 31.223474] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.223971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.224540] ksys_mmap_pgoff+0x3af/0x500 [ 31.225041] do_syscall_64+0x3f/0x90 [ 31.225526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226174] RIP: 0033:0x7f4306b9cd82 [ 31.226630] 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 [ 31.228753] RSP: 002b:00007ffe62e0e3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.229665] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4306b9cd82 [ 31.230510] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4305fd6000 [ 31.231365] RBP: 00007f4305fd6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.232209] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ada55b9ec0 [ 31.233080] R13: 00007ffe62e0e3f0 R14: 00007ffe62e0e420 R15: 00007ffe62e0e780 [ 31.233947] [ 31.234243] [ 31.234464] Allocated by task 214: [ 31.234908] kasan_save_stack+0x22/0x50 [ 31.235418] kasan_set_track+0x25/0x30 [ 31.235906] __kasan_slab_alloc+0x59/0x70 [ 31.236435] kmem_cache_alloc+0x16b/0x370 [ 31.236973] vm_area_dup+0x20/0x160 [ 31.237443] __split_vma+0x170/0x950 [ 31.237936] split_vma+0xc6/0x110 [ 31.238394] mprotect_fixup+0x8d2/0xb30 [ 31.238918] do_mprotect_pkey+0x87e/0xd40 [ 31.239459] __x64_sys_mprotect+0x78/0xc0 [ 31.240011] do_syscall_64+0x3f/0x90 [ 31.240523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241200] [ 31.241424] Freed by task 13: [ 31.241823] kasan_save_stack+0x22/0x50 [ 31.242350] kasan_set_track+0x25/0x30 [ 31.242860] kasan_save_free_info+0x2b/0x50 [ 31.243421] __kasan_slab_free+0x10a/0x190 [ 31.243979] kmem_cache_free+0x10d/0x4d0 [ 31.244516] rcu_core+0x8c8/0x2860 [ 31.244982] __do_softirq+0x1b7/0x7d4 [ 31.245478] [ 31.245699] Last potentially related work creation: [ 31.246306] kasan_save_stack+0x22/0x50 [ 31.246824] __kasan_record_aux_stack+0x8e/0xa0 [ 31.247423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.248096] remove_vma+0x139/0x170 [ 31.248586] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.249165] do_vmi_munmap+0x1f1/0x2b0 [ 31.249669] __vm_munmap+0x138/0x3a0 [ 31.250160] __x64_sys_munmap+0x59/0x80 [ 31.250681] do_syscall_64+0x3f/0x90 [ 31.251174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251846] [ 31.252072] The buggy address belongs to the object at ffff8880103440e8 [ 31.252072] which belongs to the cache vm_area_struct of size 168 [ 31.253614] The buggy address is located 88 bytes inside of [ 31.253614] freed 168-byte region [ffff8880103440e8, ffff888010344190) [ 31.255082] [ 31.255304] The buggy address belongs to the physical page: [ 31.255996] page:00000000a6642a50 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10344 [ 31.257135] memcg:ffff88801b84a101 [ 31.257577] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.258259] page_type: 0xffffffff() [ 31.258731] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.259693] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b84a101 [ 31.260644] page dumped because: kasan: bad access detected [ 31.261341] [ 31.261563] Memory state around the buggy address: [ 31.262161] ffff888010344000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.263051] ffff888010344080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.263949] >ffff888010344100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.264848] ^ [ 31.265516] ffff888010344180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.266402] ffff888010344200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.267291] ================================================================== [ 31.268323] Disabling lock debugging due to kernel taint [ 33.001135] BUG: Bad rss-counter state mm:00000000c6d31a6f type:MM_FILEPAGES val:33 [ 33.001894] BUG: Bad rss-counter state mm:00000000c6d31a6f type:MM_ANONPAGES val:22 [ 33.510006] BUG: Bad rss-counter state mm:00000000f7b33109 type:MM_FILEPAGES val:33 [ 33.511202] BUG: Bad rss-counter state mm:00000000f7b33109 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52155' (ECDSA) to the list of known hosts. 2023/06/21 09:41:24 fuzzer started 2023/06/21 09:41:24 dialing manager at localhost:36067 2023/06/21 09:41:24 checking machine... 2023/06/21 09:41:24 checking revisions... [ 34.119548] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:41:25 testing simple program... [ 34.164994] cgroup: Unknown subsys name 'net' [ 34.210247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:24 Registers: info registers vcpu 0 RAX=1ffff11001ff3e39 RBX=ffff88800ff9f198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ff9f1d0 RBP=ffff88800f326280 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =ffffed100d9c13a9 R10=0000000000000003 R11=1ffff1100d9c7479 R12=dffffc0000000000 R13=ffff88800f326280 R14=ffffffff811f7e84 R15=ffff88800ed81580 RIP=ffffffff818464f5 RFL=00000046 [---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 00007fd89a37f900 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=0000556def396818 CR3=000000000db3e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4cd89ac85ff9e7f400000000000ae988 XMM05=f0208b8b501fb9340000000000132480 XMM06=5690e2ff1911b33d0000000000131528 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007fff0b1b86e8 CR3=0000000016d2a000 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=2034323a31343a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000