syzkaller login: [ 30.910051] BUG: Bad rss-counter state mm:00000000eca2a02f type:MM_FILEPAGES val:33 [ 30.910715] BUG: Bad rss-counter state mm:00000000eca2a02f type:MM_ANONPAGES val:22 [ 31.189968] ================================================================== [ 31.190570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.191183] Read of size 8 at addr ffff88800dda06b0 by task sshd/221 [ 31.194279] [ 31.194430] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.194992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.199736] Call Trace: [ 31.199957] [ 31.200155] dump_stack_lvl+0x91/0xf0 [ 31.200489] print_report+0xcc/0x620 [ 31.200819] ? __virt_addr_valid+0x102/0x340 [ 31.201186] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201591] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202006] kasan_report+0xbe/0xf0 [ 31.202325] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202736] vma_interval_tree_remove+0xc75/0xec0 [ 31.203136] vma_prepare+0xc54/0x11a0 [ 31.203455] __split_vma+0x5af/0x950 [ 31.207878] ? __pfx___split_vma+0x10/0x10 [ 31.208289] ? find_held_lock+0x2c/0x110 [ 31.208636] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.209010] ? lock_is_held_type+0x9f/0x120 [ 31.209377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.209777] ? mtree_range_walk+0x632/0x900 [ 31.210144] ? mas_walk+0x5c7/0x7c0 [ 31.210458] do_vmi_munmap+0x1f1/0x2b0 [ 31.210784] mmap_region+0x1f9/0x2660 [ 31.211103] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.211442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.216034] ? __pfx_lock_acquire+0x10/0x10 [ 31.216401] ? __pfx_mmap_region+0x10/0x10 [ 31.216755] ? security_mmap_addr+0x7d/0xa0 [ 31.217110] ? get_unmapped_area+0x1f5/0x3f0 [ 31.217475] do_mmap+0x854/0xf00 [ 31.217770] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.218101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218475] ksys_mmap_pgoff+0x3af/0x500 [ 31.218814] do_syscall_64+0x3f/0x90 [ 31.219135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219588] RIP: 0033:0x7f61c9f62d82 [ 31.219903] 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 [ 31.221246] RSP: 002b:00007fff298822f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.221826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61c9f62d82 [ 31.222373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61c939c000 [ 31.222918] RBP: 00007f61c939c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.223464] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e54142ec0 [ 31.224047] R13: 00007fff29882310 R14: 00007fff29882340 R15: 00007fff298826a0 [ 31.224601] [ 31.224798] [ 31.224941] Allocated by task 212: [ 31.225225] kasan_save_stack+0x22/0x50 [ 31.225562] kasan_set_track+0x25/0x30 [ 31.225887] __kasan_slab_alloc+0x59/0x70 [ 31.226233] kmem_cache_alloc+0x16b/0x370 [ 31.226574] vm_area_dup+0x20/0x160 [ 31.226878] __split_vma+0x170/0x950 [ 31.227187] split_vma+0xc6/0x110 [ 31.227481] mprotect_fixup+0x8d2/0xb30 [ 31.235884] do_mprotect_pkey+0x87e/0xd40 [ 31.236237] __x64_sys_mprotect+0x78/0xc0 [ 31.236581] do_syscall_64+0x3f/0x90 [ 31.236893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237303] [ 31.237439] Freed by task 212: [ 31.237693] kasan_save_stack+0x22/0x50 [ 31.238022] kasan_set_track+0x25/0x30 [ 31.238346] kasan_save_free_info+0x2b/0x50 [ 31.238691] __kasan_slab_free+0x10a/0x190 [ 31.239035] kmem_cache_free+0x10d/0x4d0 [ 31.239367] rcu_core+0x8c8/0x2860 [ 31.243718] __do_softirq+0x1b7/0x7d4 [ 31.244060] [ 31.244221] Last potentially related work creation: [ 31.244601] kasan_save_stack+0x22/0x50 [ 31.244925] __kasan_record_aux_stack+0x8e/0xa0 [ 31.245295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.245707] remove_vma+0x139/0x170 [ 31.245998] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.246361] do_vmi_munmap+0x1f1/0x2b0 [ 31.246677] __vm_munmap+0x138/0x3a0 [ 31.246978] __x64_sys_munmap+0x59/0x80 [ 31.247304] do_syscall_64+0x3f/0x90 [ 31.251665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252079] [ 31.252221] Second to last potentially related work creation: [ 31.252658] kasan_save_stack+0x22/0x50 [ 31.252988] __kasan_record_aux_stack+0x8e/0xa0 [ 31.253365] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.253786] remove_vma+0x139/0x170 [ 31.254110] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.254470] do_vmi_munmap+0x1f1/0x2b0 [ 31.254785] mmap_region+0x1f9/0x2660 [ 31.255137] do_mmap+0x854/0xf00 [ 31.255427] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.259799] ksys_mmap_pgoff+0x3af/0x500 [ 31.260132] do_syscall_64+0x3f/0x90 [ 31.260457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.260879] [ 31.261021] The buggy address belongs to the object at ffff88800dda0658 [ 31.261021] which belongs to the cache vm_area_struct of size 168 [ 31.261978] The buggy address is located 88 bytes inside of [ 31.261978] freed 168-byte region [ffff88800dda0658, ffff88800dda0700) [ 31.262896] [ 31.263039] The buggy address belongs to the physical page: [ 31.263482] page:000000005a590198 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdda0 [ 31.272252] memcg:ffff88801008de01 [ 31.272536] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.272956] page_type: 0xffffffff() [ 31.273244] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.273806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801008de01 [ 31.274403] page dumped because: kasan: bad access detected [ 31.274830] [ 31.274973] Memory state around the buggy address: [ 31.275357] ffff88800dda0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.275920] ffff88800dda0600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.276503] >ffff88800dda0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.277036] ^ [ 31.277452] ffff88800dda0700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.277989] ffff88800dda0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.278540] ================================================================== [ 31.287899] Disabling lock debugging due to kernel taint [ 33.833280] BUG: Bad rss-counter state mm:000000009ab9c529 type:MM_FILEPAGES val:33 [ 33.833929] BUG: Bad rss-counter state mm:000000009ab9c529 type:MM_ANONPAGES val:22 [ 34.703721] BUG: Bad rss-counter state mm:0000000068dae8bd type:MM_FILEPAGES val:33 [ 34.704450] BUG: Bad rss-counter state mm:0000000068dae8bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38524' (ECDSA) to the list of known hosts. 2023/06/21 08:05:16 fuzzer started 2023/06/21 08:05:17 dialing manager at localhost:36067 2023/06/21 08:05:17 checking machine... 2023/06/21 08:05:17 checking revisions... [ 35.595695] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:05:17 testing simple program... [ 35.646188] cgroup: Unknown subsys name 'net' [ 35.707948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:05:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801005e000 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81c619e4 RDI=ffff88800bfb4640 RBP=0000000000000000 RSP=ffff88801664f900 R8 =ffff88801664f8c0 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000008 R13=0000000000000c40 R14=ffff88801b2685d8 R15=ffffffff87f3e160 RIP=ffffffff814c086b RFL=00000086 [--S--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 00007f08be7cd700 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=00007f315efe03b0 CR3=000000000ef3e000 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=2036313a35303a3830203132206e754a XMM01=5d3035343430372e34332020205b203a XMM02=415f4d4d3a6570797420646238656164 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a35303a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff819db16b RCX=0000000000000001 RDX=1ffff11001f81e9d RSI=ffff88800fc0fb70 RDI=ffffffff819db16b RBP=ffff88800fc0f4e8 RSP=ffff88800fc0f460 R8 =0000000000000001 R9 =ffff88800fc0f4d0 R10=0000000000038001 R11=00000000000231e5 R12=ffff88800fc0f558 R13=0000000000000000 R14=ffff888015a7d1c0 R15=ffff88800e559a80 RIP=ffffffff811fc7a0 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 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=00007f8b2f08f790 CR3=000000000f632000 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=0000000000000018fffffffe7ffbfeff XMM01=3b3541428e3d3df40000557f00000030 XMM02=3b3541428e3d3df4d740a6f9c653ebd9 XMM03=0000000000000002d840a6f9c653ebd9 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=90c5a6a18969527e0000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000