syzkaller login: [ 30.054863] BUG: Bad rss-counter state mm:00000000b2f7fc32 type:MM_FILEPAGES val:33 [ 30.056407] BUG: Bad rss-counter state mm:00000000b2f7fc32 type:MM_ANONPAGES val:22 [ 30.215732] ================================================================== [ 30.216648] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.217607] Read of size 8 at addr ffff88800f8e7df0 by task sshd/220 [ 30.218415] [ 30.218633] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.219650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.220636] Call Trace: [ 30.220958] [ 30.221243] dump_stack_lvl+0x91/0xf0 [ 30.221770] print_report+0xcc/0x620 [ 30.222274] ? __virt_addr_valid+0x102/0x340 [ 30.222828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.223457] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.224084] kasan_report+0xbe/0xf0 [ 30.224562] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.225207] vma_interval_tree_remove+0xc75/0xec0 [ 30.225819] vma_prepare+0xc54/0x11a0 [ 30.226322] __split_vma+0x5af/0x950 [ 30.226806] ? __pfx___split_vma+0x10/0x10 [ 30.227344] ? find_held_lock+0x2c/0x110 [ 30.227875] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.228456] ? lock_is_held_type+0x9f/0x120 [ 30.229011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.229627] ? mtree_range_walk+0x632/0x900 [ 30.230202] ? mas_walk+0x5c7/0x7c0 [ 30.230712] do_vmi_munmap+0x1f1/0x2b0 [ 30.231208] mmap_region+0x1f9/0x2660 [ 30.231711] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.232237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.232970] ? __pfx_lock_acquire+0x10/0x10 [ 30.233511] ? __pfx_mmap_region+0x10/0x10 [ 30.234047] ? security_mmap_addr+0x7d/0xa0 [ 30.234599] ? get_unmapped_area+0x1f5/0x3f0 [ 30.235164] do_mmap+0x854/0xf00 [ 30.235619] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.236127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.236702] ksys_mmap_pgoff+0x3af/0x500 [ 30.237219] do_syscall_64+0x3f/0x90 [ 30.237704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.238376] RIP: 0033:0x7f373efbbd82 [ 30.238849] 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 [ 30.240997] RSP: 002b:00007fff1ba9f4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.241921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f373efbbd82 [ 30.242816] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f373e3f5000 [ 30.243679] RBP: 00007f373e3f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.244547] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557429379d90 [ 30.245414] R13: 00007fff1ba9f4e0 R14: 00007fff1ba9f510 R15: 00007fff1ba9f870 [ 30.246298] [ 30.246596] [ 30.246816] Allocated by task 213: [ 30.247250] kasan_save_stack+0x22/0x50 [ 30.247758] kasan_set_track+0x25/0x30 [ 30.248257] __kasan_slab_alloc+0x59/0x70 [ 30.248786] kmem_cache_alloc+0x16b/0x370 [ 30.249311] vm_area_dup+0x20/0x160 [ 30.249769] __split_vma+0x170/0x950 [ 30.250257] split_vma+0xc6/0x110 [ 30.250707] mprotect_fixup+0x8d2/0xb30 [ 30.251211] do_mprotect_pkey+0x87e/0xd40 [ 30.251734] __x64_sys_mprotect+0x78/0xc0 [ 30.252260] do_syscall_64+0x3f/0x90 [ 30.252740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.253383] [ 30.253606] Freed by task 203: [ 30.254006] kasan_save_stack+0x22/0x50 [ 30.254524] kasan_set_track+0x25/0x30 [ 30.255021] kasan_save_free_info+0x2b/0x50 [ 30.255558] __kasan_slab_free+0x10a/0x190 [ 30.256096] kmem_cache_free+0x10d/0x4d0 [ 30.256602] rcu_core+0x8c8/0x2860 [ 30.257079] __do_softirq+0x1b7/0x7d4 [ 30.257571] [ 30.257789] Last potentially related work creation: [ 30.258406] kasan_save_stack+0x22/0x50 [ 30.258921] __kasan_record_aux_stack+0x8e/0xa0 [ 30.259506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.260162] remove_vma+0x139/0x170 [ 30.260625] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.261190] do_vmi_munmap+0x1f1/0x2b0 [ 30.261683] __vm_munmap+0x138/0x3a0 [ 30.262151] __x64_sys_munmap+0x59/0x80 [ 30.262666] do_syscall_64+0x3f/0x90 [ 30.263150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.263806] [ 30.264023] The buggy address belongs to the object at ffff88800f8e7d98 [ 30.264023] which belongs to the cache vm_area_struct of size 168 [ 30.265508] The buggy address is located 88 bytes inside of [ 30.265508] freed 168-byte region [ffff88800f8e7d98, ffff88800f8e7e40) [ 30.266968] [ 30.267188] The buggy address belongs to the physical page: [ 30.267873] page:0000000097e2a290 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf8e7 [ 30.268966] memcg:ffff88800db96a01 [ 30.269400] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.270124] page_type: 0xffffffff() [ 30.270606] raw: 0100000000000200 ffff8880087a0c80 ffffea0000254500 dead000000000007 [ 30.271539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db96a01 [ 30.272460] page dumped because: kasan: bad access detected [ 30.273121] [ 30.273340] Memory state around the buggy address: [ 30.273920] ffff88800f8e7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.274792] ffff88800f8e7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.275659] >ffff88800f8e7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.276512] ^ [ 30.277331] ffff88800f8e7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.278203] ffff88800f8e7e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.279069] ================================================================== [ 30.280047] Disabling lock debugging due to kernel taint [ 32.144782] BUG: Bad rss-counter state mm:0000000024b09cef type:MM_FILEPAGES val:33 [ 32.145764] BUG: Bad rss-counter state mm:0000000024b09cef type:MM_ANONPAGES val:22 [ 32.705376] BUG: Bad rss-counter state mm:000000009cb367dd type:MM_FILEPAGES val:33 [ 32.706568] BUG: Bad rss-counter state mm:000000009cb367dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26712' (ECDSA) to the list of known hosts. 2023/06/21 10:17:25 fuzzer started 2023/06/21 10:17:25 dialing manager at localhost:36067 2023/06/21 10:17:25 checking machine... 2023/06/21 10:17:25 checking revisions... [ 33.325123] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:17:25 testing simple program... [ 33.361183] cgroup: Unknown subsys name 'net' [ 33.420655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:17:24 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000002d00 RCX=ffffffff818d8ac8 RDX=0000000000000000 RSI=0000000000002d00 RDI=0000000000000000 RBP=ffff88806ce36278 RSP=ffff888016aa7dd0 R8 =0000000000000005 R9 =0000000000000000 R10=000000000000016b R11=00000000000b6a61 R12=0000000000002d6c R13=0000000000000000 R14=1ffff11002d54fd1 R15=0000000000000000 RIP=ffffffff814c03a8 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 00007f49c2252900 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=00007f49c2807650 CR3=000000000e3ea000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007ffde2647918 CR3=000000000fdaa000 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=2034323a37313a3031203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a37313a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000