syzkaller login: [ 42.689053] BUG: Bad rss-counter state mm:0000000091fb3d83 type:MM_FILEPAGES val:33 [ 42.690056] BUG: Bad rss-counter state mm:0000000091fb3d83 type:MM_ANONPAGES val:22 [ 42.872434] ================================================================== [ 42.873385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.874437] Read of size 8 at addr ffff88800b814ed8 by task sshd/220 [ 42.875247] [ 42.875476] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.876391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.877421] Call Trace: [ 42.877761] [ 42.878064] dump_stack_lvl+0x91/0xf0 [ 42.878562] print_report+0xcc/0x620 [ 42.879067] ? __virt_addr_valid+0x102/0x340 [ 42.879646] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.880284] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.880935] kasan_report+0xbe/0xf0 [ 42.881431] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.882074] vma_interval_tree_remove+0xc75/0xec0 [ 42.882707] vma_prepare+0xc54/0x11a0 [ 42.883227] __split_vma+0x5af/0x950 [ 42.883723] ? __pfx___split_vma+0x10/0x10 [ 42.884273] ? find_held_lock+0x2c/0x110 [ 42.884821] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.885409] ? lock_is_held_type+0x9f/0x120 [ 42.885972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.886606] ? mtree_range_walk+0x632/0x900 [ 42.887202] ? mas_walk+0x5c7/0x7c0 [ 42.887706] do_vmi_munmap+0x1f1/0x2b0 [ 42.888232] mmap_region+0x1f9/0x2660 [ 42.888741] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.889300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.890060] ? __pfx_lock_acquire+0x10/0x10 [ 42.890631] ? __pfx_mmap_region+0x10/0x10 [ 42.891203] ? security_mmap_addr+0x7d/0xa0 [ 42.891769] ? get_unmapped_area+0x1f5/0x3f0 [ 42.892351] do_mmap+0x854/0xf00 [ 42.892819] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.893343] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.893953] ksys_mmap_pgoff+0x3af/0x500 [ 42.894501] do_syscall_64+0x3f/0x90 [ 42.895038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.895730] RIP: 0033:0x7f4299159d82 [ 42.896214] 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 [ 42.898485] RSP: 002b:00007ffdf3d88e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.899460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4299159d82 [ 42.900356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4298593000 [ 42.901261] RBP: 00007f4298593000 R08: 0000000000000009 R09: 0000000000001000 [ 42.902175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b71f438b20 [ 42.903103] R13: 00007ffdf3d88e80 R14: 00007ffdf3d88eb0 R15: 00007ffdf3d89210 [ 42.904032] [ 42.904348] [ 42.904580] Allocated by task 213: [ 42.905043] kasan_save_stack+0x22/0x50 [ 42.905588] kasan_set_track+0x25/0x30 [ 42.906118] __kasan_slab_alloc+0x59/0x70 [ 42.906683] kmem_cache_alloc+0x16b/0x370 [ 42.907244] vm_area_dup+0x20/0x160 [ 42.907734] __split_vma+0x170/0x950 [ 42.908239] split_vma+0xc6/0x110 [ 42.908717] mprotect_fixup+0x8d2/0xb30 [ 42.909255] do_mprotect_pkey+0x87e/0xd40 [ 42.909821] __x64_sys_mprotect+0x78/0xc0 [ 42.910386] do_syscall_64+0x3f/0x90 [ 42.910897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.911615] [ 42.911847] Freed by task 117: [ 42.912282] kasan_save_stack+0x22/0x50 [ 42.912827] kasan_set_track+0x25/0x30 [ 42.913364] kasan_save_free_info+0x2b/0x50 [ 42.913939] __kasan_slab_free+0x10a/0x190 [ 42.914524] kmem_cache_free+0x10d/0x4d0 [ 42.915078] rcu_core+0x8c8/0x2860 [ 42.915561] __do_softirq+0x1b7/0x7d4 [ 42.916076] [ 42.916311] Last potentially related work creation: [ 42.916954] kasan_save_stack+0x22/0x50 [ 42.917509] __kasan_record_aux_stack+0x8e/0xa0 [ 42.918129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.918829] remove_vma+0x139/0x170 [ 42.919347] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.919961] do_vmi_munmap+0x1f1/0x2b0 [ 42.920509] __vm_munmap+0x138/0x3a0 [ 42.921028] __x64_sys_munmap+0x59/0x80 [ 42.921580] do_syscall_64+0x3f/0x90 [ 42.922095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.922810] [ 42.923056] The buggy address belongs to the object at ffff88800b814e80 [ 42.923056] which belongs to the cache vm_area_struct of size 168 [ 42.924690] The buggy address is located 88 bytes inside of [ 42.924690] freed 168-byte region [ffff88800b814e80, ffff88800b814f28) [ 42.926242] [ 42.926482] The buggy address belongs to the physical page: [ 42.927219] page:00000000ca33afe3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb814 [ 42.928434] memcg:ffff888016ff6a01 [ 42.928911] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.929628] page_type: 0xffffffff() [ 42.930133] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.931174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ff6a01 [ 42.932186] page dumped because: kasan: bad access detected [ 42.932926] [ 42.933166] Memory state around the buggy address: [ 42.933815] ffff88800b814d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.934765] ffff88800b814e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.935728] >ffff88800b814e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.936686] ^ [ 42.937514] ffff88800b814f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 42.938477] ffff88800b814f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.939450] ================================================================== [ 42.940689] Disabling lock debugging due to kernel taint [ 45.575630] BUG: Bad rss-counter state mm:000000005894b9c2 type:MM_FILEPAGES val:33 [ 45.576649] BUG: Bad rss-counter state mm:000000005894b9c2 type:MM_ANONPAGES val:22 [ 46.058902] BUG: Bad rss-counter state mm:0000000004658aac type:MM_FILEPAGES val:33 [ 46.059980] BUG: Bad rss-counter state mm:0000000004658aac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13459' (ECDSA) to the list of known hosts. 2023/06/20 01:00:39 fuzzer started 2023/06/20 01:00:39 dialing manager at localhost:44161 2023/06/20 01:00:39 checking machine... 2023/06/20 01:00:39 checking revisions... [ 46.820355] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:00:39 testing simple program... [ 46.877031] cgroup: Unknown subsys name 'net' [ 46.952143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:00:27 Registers: info registers vcpu 0 RAX=00007ffc537d6fd0 RBX=00007ffc537d6fd0 RCX=ffffffffffff7958 RDX=000000000000004a RSI=000055f225c9edb4 RDI=000055f224fb2268 RBP=00007ffc537d7050 RSP=00007ffc537d6f20 R8 =00007ffc537d7010 R9 =00007ffc537e0080 R10=0000000000000000 R11=00007ffc537d6f80 R12=000055f225c9edb0 R13=00007ffc537d6f98 R14=0000000000000000 R15=000000000000004d RIP=000055f224fa9716 RFL=00000297 [--S-APC] 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 00007f3c84e49900 00000000 00000000 GS =0000 0000000000000000 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=0000556994e8e748 CR3=000000000d5f2000 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=3e3e3e3e3e3e3e3e3e3e3e3e3e3e3e3e XMM01=ffffffffffff0000ffffffffffff0000 XMM02=ffffffffffff0000ffffffffffff0000 XMM03=000000000011fd68ec2efd57dc4c00df XMM04=9e9f86d19b0e392b00000000000ae988 XMM05=ad0cd0bb2571a7f80000000000134e58 XMM06=c291bd5c70af25b90000000000133ef8 XMM07=fb795ef6d65770560000000000124508 XMM08=00000000000060110000000000000810 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=ffff888008c58400 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=00007fff84d11f68 CR3=0000000005482000 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=00007fb280b455100000564c9a424790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000