syzkaller login: [ 32.066809] BUG: Bad rss-counter state mm:0000000031eff391 type:MM_FILEPAGES val:33 [ 32.067723] BUG: Bad rss-counter state mm:0000000031eff391 type:MM_ANONPAGES val:22 [ 32.225420] ================================================================== [ 32.226278] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.227168] Read of size 8 at addr ffff88800c5afa50 by task sshd/220 [ 32.227888] [ 32.228095] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.229039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.229993] Call Trace: [ 32.230301] [ 32.230570] dump_stack_lvl+0x91/0xf0 [ 32.231034] print_report+0xcc/0x620 [ 32.231510] ? __virt_addr_valid+0x102/0x340 [ 32.232037] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.232621] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.233205] kasan_report+0xbe/0xf0 [ 32.233660] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.234251] vma_interval_tree_remove+0xc75/0xec0 [ 32.234824] vma_prepare+0xc54/0x11a0 [ 32.235276] __split_vma+0x5af/0x950 [ 32.235726] ? __pfx___split_vma+0x10/0x10 [ 32.236224] ? find_held_lock+0x2c/0x110 [ 32.236718] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.237254] ? lock_is_held_type+0x9f/0x120 [ 32.237770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.238348] ? mtree_range_walk+0x632/0x900 [ 32.238872] ? mas_walk+0x5c7/0x7c0 [ 32.239322] do_vmi_munmap+0x1f1/0x2b0 [ 32.239787] mmap_region+0x1f9/0x2660 [ 32.240239] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.240721] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.241404] ? __pfx_lock_acquire+0x10/0x10 [ 32.241914] ? __pfx_mmap_region+0x10/0x10 [ 32.242410] ? security_mmap_addr+0x7d/0xa0 [ 32.242909] ? get_unmapped_area+0x1f5/0x3f0 [ 32.243429] do_mmap+0x854/0xf00 [ 32.243841] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.244310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.244843] ksys_mmap_pgoff+0x3af/0x500 [ 32.245318] do_syscall_64+0x3f/0x90 [ 32.245782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.246393] RIP: 0033:0x7f986c9d4d82 [ 32.246820] 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 [ 32.248904] RSP: 002b:00007ffdf7301848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.249819] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f986c9d4d82 [ 32.250654] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f986be0e000 [ 32.251498] RBP: 00007f986be0e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.252327] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600f874bec0 [ 32.253168] R13: 00007ffdf7301860 R14: 00007ffdf7301890 R15: 00007ffdf7301bf0 [ 32.254023] [ 32.254310] [ 32.254516] Allocated by task 213: [ 32.254936] kasan_save_stack+0x22/0x50 [ 32.255433] kasan_set_track+0x25/0x30 [ 32.255930] __kasan_slab_alloc+0x59/0x70 [ 32.256437] kmem_cache_alloc+0x16b/0x370 [ 32.256942] vm_area_dup+0x20/0x160 [ 32.257392] __split_vma+0x170/0x950 [ 32.257855] split_vma+0xc6/0x110 [ 32.258283] mprotect_fixup+0x8d2/0xb30 [ 32.258791] do_mprotect_pkey+0x87e/0xd40 [ 32.259291] __x64_sys_mprotect+0x78/0xc0 [ 32.259806] do_syscall_64+0x3f/0x90 [ 32.260273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.260903] [ 32.261116] Freed by task 213: [ 32.261510] kasan_save_stack+0x22/0x50 [ 32.262015] kasan_set_track+0x25/0x30 [ 32.262499] kasan_save_free_info+0x2b/0x50 [ 32.263024] __kasan_slab_free+0x10a/0x190 [ 32.263547] kmem_cache_free+0x10d/0x4d0 [ 32.264045] rcu_core+0x8c8/0x2860 [ 32.264477] __do_softirq+0x1b7/0x7d4 [ 32.264941] [ 32.265148] Last potentially related work creation: [ 32.265727] kasan_save_stack+0x22/0x50 [ 32.266216] __kasan_record_aux_stack+0x8e/0xa0 [ 32.266786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.267407] remove_vma+0x139/0x170 [ 32.267833] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.268360] do_vmi_munmap+0x1f1/0x2b0 [ 32.268844] __vm_munmap+0x138/0x3a0 [ 32.269304] __x64_sys_munmap+0x59/0x80 [ 32.269812] do_syscall_64+0x3f/0x90 [ 32.270338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.270976] [ 32.271187] The buggy address belongs to the object at ffff88800c5af9f8 [ 32.271187] which belongs to the cache vm_area_struct of size 168 [ 32.272654] The buggy address is located 88 bytes inside of [ 32.272654] freed 168-byte region [ffff88800c5af9f8, ffff88800c5afaa0) [ 32.274069] [ 32.274285] The buggy address belongs to the physical page: [ 32.274940] page:00000000aad3e299 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5af [ 32.276027] memcg:ffff88800ed72201 [ 32.276454] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.277104] page_type: 0xffffffff() [ 32.277565] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.278482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed72201 [ 32.279393] page dumped because: kasan: bad access detected [ 32.280057] [ 32.280271] Memory state around the buggy address: [ 32.280849] ffff88800c5af900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.281712] ffff88800c5af980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.282566] >ffff88800c5afa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.283419] ^ [ 32.284113] ffff88800c5afa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.284973] ffff88800c5afb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.285826] ================================================================== [ 32.286775] Disabling lock debugging due to kernel taint [ 35.042798] BUG: Bad rss-counter state mm:0000000099707934 type:MM_FILEPAGES val:33 [ 35.044442] BUG: Bad rss-counter state mm:0000000099707934 type:MM_ANONPAGES val:22 [ 35.522009] BUG: Bad rss-counter state mm:00000000c6a1e85d type:MM_FILEPAGES val:33 [ 35.523007] BUG: Bad rss-counter state mm:00000000c6a1e85d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4111' (ECDSA) to the list of known hosts. 2023/06/19 19:01:49 fuzzer started 2023/06/19 19:01:50 dialing manager at localhost:44161 2023/06/19 19:01:50 checking machine... 2023/06/19 19:01:50 checking revisions... [ 36.290064] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:50 testing simple program... [ 36.333724] cgroup: Unknown subsys name 'net' [ 36.392901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f978 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffff888008d7fd38 RDI=ffff888008d7f978 RBP=ffff888008d7f9d0 RSP=ffff888008d7f960 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff88800d7507a0 RIP=ffffffff8113038e 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 0000000000000000 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=00007f15e6f0b650 CR3=000000000dd82000 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=0000000000000000 RBX=ffffffff856528e0 RCX=ffffffff814c8421 RDX=ffff888010351b40 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007feba34a22fd R13=0000000000000000 R14=ffff888010351b40 R15=ffff88800e141ec0 RIP=ffffffff814c01f2 RFL=00000206 [-----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 00007feba2bd8900 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=00007feba20626b0 CR3=000000000da4c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=714e1fcf2d60f7ca00000000000ae988 XMM05=5bb88533e751116d0000000000136248 XMM06=4fda316b135da52b0000000000135038 XMM07=fb795ef6d657705600000000001255a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000