syzkaller login: [ 30.996910] BUG: Bad rss-counter state mm:0000000070a53000 type:MM_FILEPAGES val:33 [ 30.998571] BUG: Bad rss-counter state mm:0000000070a53000 type:MM_ANONPAGES val:22 [ 31.163064] ================================================================== [ 31.163987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.164941] Read of size 8 at addr ffff88800c67cd08 by task sshd/220 [ 31.165712] [ 31.165933] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.166975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.167955] Call Trace: [ 31.168276] [ 31.168586] dump_stack_lvl+0x91/0xf0 [ 31.169079] print_report+0xcc/0x620 [ 31.169580] ? __virt_addr_valid+0x102/0x340 [ 31.170133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170759] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171383] kasan_report+0xbe/0xf0 [ 31.171880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.172516] vma_interval_tree_remove+0xc75/0xec0 [ 31.173121] vma_prepare+0xc54/0x11a0 [ 31.173600] __split_vma+0x5af/0x950 [ 31.174080] ? __pfx___split_vma+0x10/0x10 [ 31.174614] ? find_held_lock+0x2c/0x110 [ 31.175142] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.175712] ? lock_is_held_type+0x9f/0x120 [ 31.176256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.176859] ? mtree_range_walk+0x632/0x900 [ 31.177419] ? mas_walk+0x5c7/0x7c0 [ 31.177890] do_vmi_munmap+0x1f1/0x2b0 [ 31.178389] mmap_region+0x1f9/0x2660 [ 31.178890] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.179403] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.180116] ? __pfx_lock_acquire+0x10/0x10 [ 31.180645] ? __pfx_mmap_region+0x10/0x10 [ 31.181173] ? security_mmap_addr+0x7d/0xa0 [ 31.181703] ? get_unmapped_area+0x1f5/0x3f0 [ 31.182251] do_mmap+0x854/0xf00 [ 31.182700] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.183194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.183754] ksys_mmap_pgoff+0x3af/0x500 [ 31.184263] do_syscall_64+0x3f/0x90 [ 31.184746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185391] RIP: 0033:0x7f049f0aad82 [ 31.185853] 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 [ 31.187983] RSP: 002b:00007ffde0c19308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.188890] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f049f0aad82 [ 31.189731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f049e4e4000 [ 31.190575] RBP: 00007f049e4e4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.191429] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ed1cd9ec0 [ 31.192271] R13: 00007ffde0c19320 R14: 00007ffde0c19350 R15: 00007ffde0c196b0 [ 31.193124] [ 31.193417] [ 31.193638] Allocated by task 213: [ 31.194068] kasan_save_stack+0x22/0x50 [ 31.194585] kasan_set_track+0x25/0x30 [ 31.195091] __kasan_slab_alloc+0x59/0x70 [ 31.195615] kmem_cache_alloc+0x16b/0x370 [ 31.196139] vm_area_dup+0x20/0x160 [ 31.196589] __split_vma+0x170/0x950 [ 31.197053] split_vma+0xc6/0x110 [ 31.197498] mprotect_fixup+0x8d2/0xb30 [ 31.197999] do_mprotect_pkey+0x87e/0xd40 [ 31.198526] __x64_sys_mprotect+0x78/0xc0 [ 31.199066] do_syscall_64+0x3f/0x90 [ 31.199543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200188] [ 31.200410] Freed by task 213: [ 31.200812] kasan_save_stack+0x22/0x50 [ 31.201317] kasan_set_track+0x25/0x30 [ 31.201815] kasan_save_free_info+0x2b/0x50 [ 31.202348] __kasan_slab_free+0x10a/0x190 [ 31.202892] kmem_cache_free+0x10d/0x4d0 [ 31.203399] rcu_core+0x8c8/0x2860 [ 31.203848] __do_softirq+0x1b7/0x7d4 [ 31.204321] [ 31.204535] Last potentially related work creation: [ 31.205121] kasan_save_stack+0x22/0x50 [ 31.205625] __kasan_record_aux_stack+0x8e/0xa0 [ 31.206208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.206880] remove_vma+0x139/0x170 [ 31.207337] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.207897] do_vmi_munmap+0x1f1/0x2b0 [ 31.208380] __vm_munmap+0x138/0x3a0 [ 31.208847] __x64_sys_munmap+0x59/0x80 [ 31.209348] do_syscall_64+0x3f/0x90 [ 31.209827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.210468] [ 31.210692] Second to last potentially related work creation: [ 31.211379] kasan_save_stack+0x22/0x50 [ 31.211885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.212456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.213095] remove_vma+0x139/0x170 [ 31.213556] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.214117] do_vmi_munmap+0x1f1/0x2b0 [ 31.214602] mmap_region+0x1f9/0x2660 [ 31.215087] do_mmap+0x854/0xf00 [ 31.215518] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.216008] ksys_mmap_pgoff+0x3af/0x500 [ 31.216522] do_syscall_64+0x3f/0x90 [ 31.217002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217654] [ 31.217868] The buggy address belongs to the object at ffff88800c67ccb0 [ 31.217868] which belongs to the cache vm_area_struct of size 168 [ 31.219361] The buggy address is located 88 bytes inside of [ 31.219361] freed 168-byte region [ffff88800c67ccb0, ffff88800c67cd58) [ 31.220773] [ 31.220991] The buggy address belongs to the physical page: [ 31.221648] page:000000003286871e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc67c [ 31.222739] memcg:ffff88800db56c01 [ 31.223173] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.223868] page_type: 0xffffffff() [ 31.224323] raw: 0100000000000200 ffff88800879fc80 ffffea0000360080 dead000000000005 [ 31.225239] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db56c01 [ 31.226142] page dumped because: kasan: bad access detected [ 31.226823] [ 31.227041] Memory state around the buggy address: [ 31.227621] ffff88800c67cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.228484] ffff88800c67cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.229345] >ffff88800c67cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.230191] ^ [ 31.230653] ffff88800c67cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.231510] ffff88800c67ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.232368] ================================================================== [ 31.233509] Disabling lock debugging due to kernel taint [ 34.029414] BUG: Bad rss-counter state mm:00000000287e5fec type:MM_FILEPAGES val:33 [ 34.030495] BUG: Bad rss-counter state mm:00000000287e5fec type:MM_ANONPAGES val:22 [ 34.461921] BUG: Bad rss-counter state mm:000000006aac3099 type:MM_FILEPAGES val:33 [ 34.463256] BUG: Bad rss-counter state mm:000000006aac3099 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54085' (ECDSA) to the list of known hosts. 2023/06/19 11:33:11 fuzzer started 2023/06/19 11:33:12 dialing manager at localhost:44161 2023/06/19 11:33:12 checking machine... 2023/06/19 11:33:12 checking revisions... [ 35.199277] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:33:12 testing simple program... [ 35.243726] cgroup: Unknown subsys name 'net' [ 35.317551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:33:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f376e20 RCX=0000000000000001 RDX=1ffff11001e6edc5 RSI=ffffffff844c1d8e RDI=ffff88800f376e28 RBP=0000000000000007 RSP=ffff88800f376d38 R8 =0000000000000001 R9 =ffff88800f376d98 R10=0000000000038001 R11=00000000000b3ea9 R12=ffff88800f376e20 R13=0000000000000000 R14=ffff888016e1d1c0 R15=ffff88800f377278 RIP=ffffffff813ad485 RFL=00000283 [--S---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 00007f2ce310e900 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=00007f2ce30ed020 CR3=000000001c944000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa538addfd0 CR3=000000000dd3e000 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=2031313a33333a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a33333a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000