syzkaller login: [ 30.939048] BUG: Bad rss-counter state mm:0000000036ce7bcd type:MM_FILEPAGES val:33 [ 30.939929] BUG: Bad rss-counter state mm:0000000036ce7bcd type:MM_ANONPAGES val:22 [ 31.161801] ================================================================== [ 31.162450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.163108] Read of size 8 at addr ffff8880183d1880 by task sshd/220 [ 31.163594] [ 31.163738] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.164291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.164913] Call Trace: [ 31.165119] [ 31.165305] dump_stack_lvl+0x91/0xf0 [ 31.165623] print_report+0xcc/0x620 [ 31.165946] ? __virt_addr_valid+0x102/0x340 [ 31.166305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.166704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167126] kasan_report+0xbe/0xf0 [ 31.167434] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167833] vma_interval_tree_remove+0xc75/0xec0 [ 31.168231] vma_prepare+0xc54/0x11a0 [ 31.168544] __split_vma+0x5af/0x950 [ 31.168878] ? __pfx___split_vma+0x10/0x10 [ 31.169220] ? find_held_lock+0x2c/0x110 [ 31.169559] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.169951] ? lock_is_held_type+0x9f/0x120 [ 31.170315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.170709] ? mtree_range_walk+0x632/0x900 [ 31.171082] ? mas_walk+0x5c7/0x7c0 [ 31.171399] do_vmi_munmap+0x1f1/0x2b0 [ 31.171718] mmap_region+0x1f9/0x2660 [ 31.172075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.172410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.172897] ? __pfx_lock_acquire+0x10/0x10 [ 31.173241] ? __pfx_mmap_region+0x10/0x10 [ 31.173586] ? security_mmap_addr+0x7d/0xa0 [ 31.173969] ? get_unmapped_area+0x1f5/0x3f0 [ 31.174333] do_mmap+0x854/0xf00 [ 31.174621] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.175410] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.175896] ksys_mmap_pgoff+0x3af/0x500 [ 31.176252] do_syscall_64+0x3f/0x90 [ 31.176611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.177032] RIP: 0033:0x7fcdd67ccd82 [ 31.177330] 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 [ 31.178786] RSP: 002b:00007ffe32adced8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.179391] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdd67ccd82 [ 31.180026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdd5c06000 [ 31.180610] RBP: 00007fcdd5c06000 R08: 0000000000000009 R09: 0000000000001000 [ 31.181159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7c96d3f70 [ 31.181746] R13: 00007ffe32adcef0 R14: 00007ffe32adcf20 R15: 00007ffe32add280 [ 31.182295] [ 31.182524] [ 31.182670] Allocated by task 213: [ 31.182950] kasan_save_stack+0x22/0x50 [ 31.183304] kasan_set_track+0x25/0x30 [ 31.183712] __kasan_slab_alloc+0x59/0x70 [ 31.184064] kmem_cache_alloc+0x16b/0x370 [ 31.184398] vm_area_dup+0x20/0x160 [ 31.184783] __split_vma+0x170/0x950 [ 31.185128] split_vma+0xc6/0x110 [ 31.185414] mprotect_fixup+0x8d2/0xb30 [ 31.185803] do_mprotect_pkey+0x87e/0xd40 [ 31.186155] __x64_sys_mprotect+0x78/0xc0 [ 31.186534] do_syscall_64+0x3f/0x90 [ 31.186852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.187325] [ 31.187466] Freed by task 213: [ 31.187778] kasan_save_stack+0x22/0x50 [ 31.188126] kasan_set_track+0x25/0x30 [ 31.188445] kasan_save_free_info+0x2b/0x50 [ 31.188837] __kasan_slab_free+0x10a/0x190 [ 31.189220] kmem_cache_free+0x10d/0x4d0 [ 31.189928] rcu_core+0x8c8/0x2860 [ 31.190219] __do_softirq+0x1b7/0x7d4 [ 31.191157] [ 31.191298] Last potentially related work creation: [ 31.191719] kasan_save_stack+0x22/0x50 [ 31.192087] __kasan_record_aux_stack+0x8e/0xa0 [ 31.192458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.192932] remove_vma+0x139/0x170 [ 31.193237] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.193639] do_vmi_munmap+0x1f1/0x2b0 [ 31.193957] __vm_munmap+0x138/0x3a0 [ 31.194266] __x64_sys_munmap+0x59/0x80 [ 31.194676] do_syscall_64+0x3f/0x90 [ 31.194997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195411] [ 31.195597] Second to last potentially related work creation: [ 31.196040] kasan_save_stack+0x22/0x50 [ 31.196368] __kasan_record_aux_stack+0x8e/0xa0 [ 31.196798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.197230] remove_vma+0x139/0x170 [ 31.197565] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.197949] do_vmi_munmap+0x1f1/0x2b0 [ 31.198288] mmap_region+0x1f9/0x2660 [ 31.198641] do_mmap+0x854/0xf00 [ 31.198941] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.199284] ksys_mmap_pgoff+0x3af/0x500 [ 31.199688] do_syscall_64+0x3f/0x90 [ 31.200033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200455] [ 31.200642] The buggy address belongs to the object at ffff8880183d1828 [ 31.200642] which belongs to the cache vm_area_struct of size 168 [ 31.201638] The buggy address is located 88 bytes inside of [ 31.201638] freed 168-byte region [ffff8880183d1828, ffff8880183d18d0) [ 31.202590] [ 31.202732] The buggy address belongs to the physical page: [ 31.203164] page:00000000aa5b6a3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183d1 [ 31.203887] memcg:ffff888018277801 [ 31.204167] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.204661] page_type: 0xffffffff() [ 31.204958] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b18c0 0000000000000002 [ 31.205586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018277801 [ 31.206210] page dumped because: kasan: bad access detected [ 31.206677] [ 31.206832] Memory state around the buggy address: [ 31.207249] ffff8880183d1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.207840] ffff8880183d1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.208390] >ffff8880183d1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.208984] ^ [ 31.209250] ffff8880183d1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.209879] ffff8880183d1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.210430] ================================================================== [ 31.219490] Disabling lock debugging due to kernel taint [ 33.663103] BUG: Bad rss-counter state mm:000000008369846d type:MM_FILEPAGES val:33 [ 33.663750] BUG: Bad rss-counter state mm:000000008369846d type:MM_ANONPAGES val:22 [ 34.964292] BUG: Bad rss-counter state mm:00000000d3a449d9 type:MM_FILEPAGES val:33 [ 34.964945] BUG: Bad rss-counter state mm:00000000d3a449d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38488' (ECDSA) to the list of known hosts. 2023/06/21 10:20:30 fuzzer started 2023/06/21 10:20:30 dialing manager at localhost:36067 2023/06/21 10:20:30 checking machine... 2023/06/21 10:20:30 checking revisions... [ 35.873722] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:20:31 testing simple program... [ 35.914450] cgroup: Unknown subsys name 'net' [ 35.976617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:20:30 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800f11fe20 RCX=ffffffff844a57aa RDX=ffff888016591b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800f11fd88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801ca6161e R13=ffffed1001e23fcb R14=0000000000000000 R15=ffff88800f11fe59 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f67f185a900 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=000055ed4f990428 CR3=000000000f04c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801a096570 RCX=0000000000000000 RDX=ffff8880102d3680 RSI=ffffffff81624930 RDI=ffffea00006cb900 RBP=ffffea00006cb900 RSP=ffff88800fcd78b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff84938760 R13=ffff88800fcd79a8 R14=00000000000000c0 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000292 [--S-A--] 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 00007fa6d97e2900 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=000055d4822be17d CR3=000000000946e000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000