syzkaller login: [ 31.133682] BUG: Bad rss-counter state mm:000000003b960b75 type:MM_FILEPAGES val:33 [ 31.134878] BUG: Bad rss-counter state mm:000000003b960b75 type:MM_ANONPAGES val:22 [ 31.174516] ================================================================== [ 31.175608] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.176716] Read of size 8 at addr ffff8880165d0228 by task sshd/220 [ 31.177561] [ 31.177842] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.178768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.179865] Call Trace: [ 31.180214] [ 31.180499] dump_stack_lvl+0x91/0xf0 [ 31.181124] print_report+0xcc/0x620 [ 31.181610] ? __virt_addr_valid+0x102/0x340 [ 31.182161] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182777] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183422] kasan_report+0xbe/0xf0 [ 31.184051] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184686] vma_interval_tree_remove+0xc75/0xec0 [ 31.185441] vma_prepare+0xc54/0x11a0 [ 31.186069] __split_vma+0x5af/0x950 [ 31.186539] ? __pfx___split_vma+0x10/0x10 [ 31.187159] ? find_held_lock+0x2c/0x110 [ 31.187681] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.188373] ? lock_is_held_type+0x9f/0x120 [ 31.189034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189703] ? mtree_range_walk+0x632/0x900 [ 31.190260] ? mas_walk+0x5c7/0x7c0 [ 31.190733] do_vmi_munmap+0x1f1/0x2b0 [ 31.191229] mmap_region+0x1f9/0x2660 [ 31.191711] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192250] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.192961] ? __pfx_lock_acquire+0x10/0x10 [ 31.193497] ? __pfx_mmap_region+0x10/0x10 [ 31.194022] ? security_mmap_addr+0x7d/0xa0 [ 31.194599] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195149] do_mmap+0x854/0xf00 [ 31.195587] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.196690] ksys_mmap_pgoff+0x3af/0x500 [ 31.197208] do_syscall_64+0x3f/0x90 [ 31.197683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198333] RIP: 0033:0x7f458a433d82 [ 31.198785] 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 [ 31.200944] RSP: 002b:00007ffc2d2fc4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.201855] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f458a433d82 [ 31.202703] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f458986d000 [ 31.203556] RBP: 00007f458986d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.204430] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621ac922ec0 [ 31.205277] R13: 00007ffc2d2fc510 R14: 00007ffc2d2fc540 R15: 00007ffc2d2fc8a0 [ 31.206145] [ 31.206437] [ 31.206650] Allocated by task 213: [ 31.207088] kasan_save_stack+0x22/0x50 [ 31.207598] kasan_set_track+0x25/0x30 [ 31.208134] __kasan_slab_alloc+0x59/0x70 [ 31.208666] kmem_cache_alloc+0x16b/0x370 [ 31.209190] vm_area_dup+0x20/0x160 [ 31.209644] __split_vma+0x170/0x950 [ 31.210111] split_vma+0xc6/0x110 [ 31.210560] mprotect_fixup+0x8d2/0xb30 [ 31.211062] do_mprotect_pkey+0x87e/0xd40 [ 31.211592] __x64_sys_mprotect+0x78/0xc0 [ 31.212151] do_syscall_64+0x3f/0x90 [ 31.212631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213277] [ 31.213496] Freed by task 213: [ 31.213887] kasan_save_stack+0x22/0x50 [ 31.214392] kasan_set_track+0x25/0x30 [ 31.214884] kasan_save_free_info+0x2b/0x50 [ 31.215430] __kasan_slab_free+0x10a/0x190 [ 31.215975] kmem_cache_free+0x10d/0x4d0 [ 31.216516] rcu_core+0x8c8/0x2860 [ 31.216973] __do_softirq+0x1b7/0x7d4 [ 31.217465] [ 31.217679] Last potentially related work creation: [ 31.218271] kasan_save_stack+0x22/0x50 [ 31.218776] __kasan_record_aux_stack+0x8e/0xa0 [ 31.219346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.220027] remove_vma+0x139/0x170 [ 31.220504] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.221062] do_vmi_munmap+0x1f1/0x2b0 [ 31.221553] __vm_munmap+0x138/0x3a0 [ 31.222018] __x64_sys_munmap+0x59/0x80 [ 31.222515] do_syscall_64+0x3f/0x90 [ 31.222995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223634] [ 31.223850] The buggy address belongs to the object at ffff8880165d01d0 [ 31.223850] which belongs to the cache vm_area_struct of size 168 [ 31.225316] The buggy address is located 88 bytes inside of [ 31.225316] freed 168-byte region [ffff8880165d01d0, ffff8880165d0278) [ 31.226700] [ 31.226912] The buggy address belongs to the physical page: [ 31.227566] page:0000000055bd59a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165d0 [ 31.228699] memcg:ffff888018f75401 [ 31.229120] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.229762] page_type: 0xffffffff() [ 31.230206] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.231117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f75401 [ 31.232025] page dumped because: kasan: bad access detected [ 31.232709] [ 31.232927] Memory state around the buggy address: [ 31.233508] ffff8880165d0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.234365] ffff8880165d0180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.235218] >ffff8880165d0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.236082] ^ [ 31.236647] ffff8880165d0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.237492] ffff8880165d0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.238336] ================================================================== [ 31.239236] Disabling lock debugging due to kernel taint [ 33.720115] BUG: Bad rss-counter state mm:00000000914b03e9 type:MM_FILEPAGES val:33 [ 33.721013] BUG: Bad rss-counter state mm:00000000914b03e9 type:MM_ANONPAGES val:22 [ 34.278438] BUG: Bad rss-counter state mm:00000000565ee7b9 type:MM_FILEPAGES val:33 [ 34.279603] BUG: Bad rss-counter state mm:00000000565ee7b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6591' (ECDSA) to the list of known hosts. 2023/06/20 13:59:39 fuzzer started 2023/06/20 13:59:39 dialing manager at localhost:36067 2023/06/20 13:59:39 checking machine... 2023/06/20 13:59:39 checking revisions... [ 34.917447] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:59:39 testing simple program... [ 34.969627] cgroup: Unknown subsys name 'net' [ 35.008061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:59:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019cb3325 RCX=0000000000000000 RDX=ffff8880147c51c0 RSI=ffffffff818d51fe RDI=0000000000000005 RBP=000000000000000a RSP=ffff888017e1fa58 R8 =0000000000000005 R9 =0000000000000007 R10=000000000000000a R11=0000000000000001 R12=65642e6e69676f6c R13=65642e6e69676f6c R14=dffffc0000000000 R15=ffff8880199a9968 RIP=ffffffff814c089b 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 00007f4c60c8f900 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=00007f4c61244650 CR3=000000000e172000 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=2039333a39353a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a39353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00017430d5cfef7c RBX=fb795ef6d6577056 RCX=000000000000acf8 RDX=0000000000121f08 RSI=0000000000000000 RDI=000055d4b55a2400 RBP=000000000000001a RSP=00007ffe4871edf0 R8 =00007ffe4871eea0 R9 =00007ffe4871eea8 R10=00007f5c00a60a34 R11=000000000052545f R12=000055d4b55d7820 R13=fb795ef6d6577056 R14=000055d4b55a2400 R15=00007ffe4871eea0 RIP=00007f5c009ef176 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5bffe6b900 00000000 00000000 GS =0000 0000000000000000 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=00007f5bff389020 CR3=000000000f740000 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=ffffffffffffffffffffffffffffffff XMM01=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=df957eab269ec71300000000000ae988 XMM05=9788ca83854866af0000000000132ed8 XMM06=19e9129bd510f2350000000000131d70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000