syzkaller login: [ 42.042649] BUG: Bad rss-counter state mm:0000000067a6ea92 type:MM_FILEPAGES val:33 [ 42.043669] BUG: Bad rss-counter state mm:0000000067a6ea92 type:MM_ANONPAGES val:22 [ 42.207420] ================================================================== [ 42.208534] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.209814] Read of size 8 at addr ffff888008dcd3f8 by task sshd/219 [ 42.210679] [ 42.210894] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.211757] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.212761] Call Trace: [ 42.213086] [ 42.213391] dump_stack_lvl+0x91/0xf0 [ 42.213874] print_report+0xcc/0x620 [ 42.214369] ? __virt_addr_valid+0x102/0x340 [ 42.214915] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.215553] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.216194] kasan_report+0xbe/0xf0 [ 42.216672] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.217315] vma_interval_tree_remove+0xc75/0xec0 [ 42.217909] vma_prepare+0xc54/0x11a0 [ 42.218408] __split_vma+0x5af/0x950 [ 42.218882] ? __pfx___split_vma+0x10/0x10 [ 42.219439] ? find_held_lock+0x2c/0x110 [ 42.219962] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.220561] ? lock_is_held_type+0x9f/0x120 [ 42.221115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.221738] ? mtree_range_walk+0x632/0x900 [ 42.222310] ? mas_walk+0x5c7/0x7c0 [ 42.222782] do_vmi_munmap+0x1f1/0x2b0 [ 42.223297] mmap_region+0x1f9/0x2660 [ 42.223775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.224324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.225035] ? __pfx_lock_acquire+0x10/0x10 [ 42.225589] ? __pfx_mmap_region+0x10/0x10 [ 42.226133] ? security_mmap_addr+0x7d/0xa0 [ 42.226663] ? get_unmapped_area+0x1f5/0x3f0 [ 42.227237] do_mmap+0x854/0xf00 [ 42.227684] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.228207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.228771] ksys_mmap_pgoff+0x3af/0x500 [ 42.229325] do_syscall_64+0x3f/0x90 [ 42.229803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.230457] RIP: 0033:0x7fc5bad92d82 [ 42.230926] 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 [ 42.233157] RSP: 002b:00007fff8705c598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.234082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5bad92d82 [ 42.234953] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5ba1cc000 [ 42.235807] RBP: 00007fc5ba1cc000 R08: 0000000000000009 R09: 0000000000001000 [ 42.236683] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583291bab20 [ 42.237558] R13: 00007fff8705c5b0 R14: 00007fff8705c5e0 R15: 00007fff8705c940 [ 42.238434] [ 42.238730] [ 42.238948] Allocated by task 212: [ 42.239395] kasan_save_stack+0x22/0x50 [ 42.239905] kasan_set_track+0x25/0x30 [ 42.240426] __kasan_slab_alloc+0x59/0x70 [ 42.240977] kmem_cache_alloc+0x16b/0x370 [ 42.241682] vm_area_dup+0x20/0x160 [ 42.242300] __split_vma+0x170/0x950 [ 42.242940] split_vma+0xc6/0x110 [ 42.243425] mprotect_fixup+0x8d2/0xb30 [ 42.243927] do_mprotect_pkey+0x87e/0xd40 [ 42.244487] __x64_sys_mprotect+0x78/0xc0 [ 42.245009] do_syscall_64+0x3f/0x90 [ 42.245511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.246176] [ 42.246394] Freed by task 19: [ 42.246777] kasan_save_stack+0x22/0x50 [ 42.247295] kasan_set_track+0x25/0x30 [ 42.247792] kasan_save_free_info+0x2b/0x50 [ 42.248371] __kasan_slab_free+0x10a/0x190 [ 42.248907] kmem_cache_free+0x10d/0x4d0 [ 42.249451] rcu_core+0x8c8/0x2860 [ 42.249897] __do_softirq+0x1b7/0x7d4 [ 42.250394] [ 42.250612] Last potentially related work creation: [ 42.251216] kasan_save_stack+0x22/0x50 [ 42.251886] __kasan_record_aux_stack+0x8e/0xa0 [ 42.252525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.253162] remove_vma+0x139/0x170 [ 42.253613] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.254165] do_vmi_munmap+0x1f1/0x2b0 [ 42.254650] __vm_munmap+0x138/0x3a0 [ 42.255113] __x64_sys_munmap+0x59/0x80 [ 42.255606] do_syscall_64+0x3f/0x90 [ 42.256086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.256729] [ 42.256946] The buggy address belongs to the object at ffff888008dcd3a0 [ 42.256946] which belongs to the cache vm_area_struct of size 168 [ 42.258394] The buggy address is located 88 bytes inside of [ 42.258394] freed 168-byte region [ffff888008dcd3a0, ffff888008dcd448) [ 42.259801] [ 42.260019] The buggy address belongs to the physical page: [ 42.260676] page:00000000217e7007 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8dcd [ 42.261753] memcg:ffff888016de4301 [ 42.262180] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.262825] page_type: 0xffffffff() [ 42.263277] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.264215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016de4301 [ 42.265125] page dumped because: kasan: bad access detected [ 42.265791] [ 42.266006] Memory state around the buggy address: [ 42.266587] ffff888008dcd280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 42.267443] ffff888008dcd300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 42.268312] >ffff888008dcd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.269170] ^ [ 42.270010] ffff888008dcd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.270865] ffff888008dcd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.271718] ================================================================== [ 42.273024] Disabling lock debugging due to kernel taint [ 44.894843] BUG: Bad rss-counter state mm:00000000c185b925 type:MM_FILEPAGES val:33 [ 44.896217] BUG: Bad rss-counter state mm:00000000c185b925 type:MM_ANONPAGES val:22 [ 45.355408] BUG: Bad rss-counter state mm:00000000b1c251ac type:MM_FILEPAGES val:33 [ 45.356412] BUG: Bad rss-counter state mm:00000000b1c251ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31752' (ECDSA) to the list of known hosts. 2023/06/20 08:15:19 fuzzer started 2023/06/20 08:15:19 dialing manager at localhost:44161 2023/06/20 08:15:19 checking machine... 2023/06/20 08:15:19 checking revisions... [ 46.094361] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:15:19 testing simple program... [ 46.154513] cgroup: Unknown subsys name 'net' [ 46.206017] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:15:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888014207cc0 RSI=ffff888014207ca8 RDI=ffff8880142079f0 RBP=ffff888014207a78 RSP=ffff8880142079c0 R8 =0000000000000001 R9 =ffff888014207a20 R10=0000000000038001 R11=0000000000020c48 R12=ffff888014207aa8 R13=ffff888014207a28 R14=ffff888014207ca8 R15=ffff8880142079e0 RIP=ffffffff81130933 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 00007efd829ab900 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=00007fffcb4e6000 CR3=000000001424c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f967715a6a0 CR3=0000000018b5a000 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=2038313a35313a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a35313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000