syzkaller login: [ 31.141206] BUG: Bad rss-counter state mm:00000000de0f332b type:MM_FILEPAGES val:33 [ 31.142474] BUG: Bad rss-counter state mm:00000000de0f332b type:MM_ANONPAGES val:22 [ 31.179327] ================================================================== [ 31.180638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.182128] Read of size 8 at addr ffff88800fc97310 by task sshd/223 [ 31.183244] [ 31.183602] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.184884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.186227] Call Trace: [ 31.186739] [ 31.187119] dump_stack_lvl+0x91/0xf0 [ 31.187757] print_report+0xcc/0x620 [ 31.188393] ? __virt_addr_valid+0x102/0x340 [ 31.189138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189954] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190790] kasan_report+0xbe/0xf0 [ 31.191413] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192240] vma_interval_tree_remove+0xc75/0xec0 [ 31.193044] vma_prepare+0xc54/0x11a0 [ 31.193685] __split_vma+0x5af/0x950 [ 31.194326] ? __pfx___split_vma+0x10/0x10 [ 31.195042] ? find_held_lock+0x2c/0x110 [ 31.195739] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.196410] ? lock_is_held_type+0x9f/0x120 [ 31.197063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.197795] ? mtree_range_walk+0x632/0x900 [ 31.198461] ? mas_walk+0x5c7/0x7c0 [ 31.199038] do_vmi_munmap+0x1f1/0x2b0 [ 31.199625] mmap_region+0x1f9/0x2660 [ 31.200198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.200805] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.201669] ? __pfx_lock_acquire+0x10/0x10 [ 31.202344] ? __pfx_mmap_region+0x10/0x10 [ 31.202974] ? security_mmap_addr+0x7d/0xa0 [ 31.203612] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204256] do_mmap+0x854/0xf00 [ 31.204771] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205331] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.205862] ksys_mmap_pgoff+0x3af/0x500 [ 31.206350] do_syscall_64+0x3f/0x90 [ 31.206803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207414] RIP: 0033:0x7f4d5f2efd82 [ 31.207853] 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 [ 31.209842] RSP: 002b:00007ffdc597bca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.210702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d5f2efd82 [ 31.211502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d5e729000 [ 31.212299] RBP: 00007f4d5e729000 R08: 0000000000000009 R09: 0000000000001000 [ 31.213092] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c859381ec0 [ 31.213889] R13: 00007ffdc597bcc0 R14: 00007ffdc597bcf0 R15: 00007ffdc597c050 [ 31.214715] [ 31.214990] [ 31.215199] Allocated by task 216: [ 31.215603] kasan_save_stack+0x22/0x50 [ 31.216094] kasan_set_track+0x25/0x30 [ 31.216580] __kasan_slab_alloc+0x59/0x70 [ 31.217100] kmem_cache_alloc+0x16b/0x370 [ 31.217617] vm_area_dup+0x20/0x160 [ 31.218066] __split_vma+0x170/0x950 [ 31.218541] split_vma+0xc6/0x110 [ 31.218977] mprotect_fixup+0x8d2/0xb30 [ 31.219476] do_mprotect_pkey+0x87e/0xd40 [ 31.219992] __x64_sys_mprotect+0x78/0xc0 [ 31.220508] do_syscall_64+0x3f/0x90 [ 31.220981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221614] [ 31.221834] Freed by task 216: [ 31.222229] kasan_save_stack+0x22/0x50 [ 31.222724] kasan_set_track+0x25/0x30 [ 31.223199] kasan_save_free_info+0x2b/0x50 [ 31.223713] __kasan_slab_free+0x10a/0x190 [ 31.224266] kmem_cache_free+0x10d/0x4d0 [ 31.224744] rcu_core+0x8c8/0x2860 [ 31.225171] __do_softirq+0x1b7/0x7d4 [ 31.225625] [ 31.225834] Last potentially related work creation: [ 31.226399] kasan_save_stack+0x22/0x50 [ 31.226876] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228025] remove_vma+0x139/0x170 [ 31.228451] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.228979] do_vmi_munmap+0x1f1/0x2b0 [ 31.229436] __vm_munmap+0x138/0x3a0 [ 31.229875] __x64_sys_munmap+0x59/0x80 [ 31.230350] do_syscall_64+0x3f/0x90 [ 31.230801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231412] [ 31.231615] The buggy address belongs to the object at ffff88800fc972b8 [ 31.231615] which belongs to the cache vm_area_struct of size 168 [ 31.232992] The buggy address is located 88 bytes inside of [ 31.232992] freed 168-byte region [ffff88800fc972b8, ffff88800fc97360) [ 31.234380] [ 31.234589] The buggy address belongs to the physical page: [ 31.235220] page:00000000d7267edd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc97 [ 31.236261] memcg:ffff888019cae101 [ 31.236672] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.237296] page_type: 0xffffffff() [ 31.237740] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.238644] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cae101 [ 31.239524] page dumped because: kasan: bad access detected [ 31.240178] [ 31.240385] Memory state around the buggy address: [ 31.240954] ffff88800fc97200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.241778] ffff88800fc97280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.242625] >ffff88800fc97300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.243451] ^ [ 31.243896] ffff88800fc97380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.244723] ffff88800fc97400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.245557] ================================================================== [ 31.246550] Disabling lock debugging due to kernel taint [ 33.400774] BUG: Bad rss-counter state mm:00000000e13f1833 type:MM_FILEPAGES val:33 [ 33.401886] BUG: Bad rss-counter state mm:00000000e13f1833 type:MM_ANONPAGES val:22 [ 33.858581] BUG: Bad rss-counter state mm:000000002b4e5028 type:MM_FILEPAGES val:33 [ 33.860231] BUG: Bad rss-counter state mm:000000002b4e5028 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19004' (ECDSA) to the list of known hosts. 2023/06/21 02:09:21 fuzzer started 2023/06/21 02:09:22 dialing manager at localhost:36067 2023/06/21 02:09:22 checking machine... 2023/06/21 02:09:22 checking revisions... [ 34.562315] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:09:22 testing simple program... [ 34.600165] cgroup: Unknown subsys name 'net' [ 34.641854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:09:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fbacdd4c650 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=2031323a39303a3230203132206e754a XMM01=657463656e6e6f63736944203a5d3333 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3333325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a39303a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf39f08 RCX=00000007e1050f84 RDX=ffffffff85d3e490 RSI=1ffff11001acf003 RDI=ffff88806cf3a168 RBP=ffff88800d697b50 RSP=ffff88800d697a20 R8 =1ffff1100d9e742d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000f5257d14 R12=ffff88806cf39500 R13=ffff88800d678000 R14=ffff88806cf39ee0 R15=ffff888008d91b40 RIP=ffffffff8451d211 RFL=00000002 [-------] 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 00007efcf1595900 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=00007efcf09e6190 CR3=000000000ca96000 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=3765ad86270b0190a0492cdc0ff9d329 XMM02=2c67c8bc2e329bc30000000000119ec8 XMM03=fb795ef6d65770560000000000121368 XMM04=a79e85f12ebed1bc00000000000ae988 XMM05=83594ee05b8d38950000000000131230 XMM06=993088549562ad0300000000001310b8 XMM07=e042d86d42eb936e00000000001215e8 XMM08=4d2033949f37469a0000000000119f28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000