syzkaller login: [ 31.109926] BUG: Bad rss-counter state mm:000000003483a37f type:MM_FILEPAGES val:33 [ 31.111319] BUG: Bad rss-counter state mm:000000003483a37f type:MM_ANONPAGES val:22 [ 31.268748] ================================================================== [ 31.269736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.270944] Read of size 8 at addr ffff88800d6ccdf0 by task sshd/220 [ 31.271822] [ 31.272064] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.273021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.274094] Call Trace: [ 31.274452] [ 31.274772] dump_stack_lvl+0x91/0xf0 [ 31.275311] print_report+0xcc/0x620 [ 31.275840] ? __virt_addr_valid+0x102/0x340 [ 31.276445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277800] kasan_report+0xbe/0xf0 [ 31.278327] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279030] vma_interval_tree_remove+0xc75/0xec0 [ 31.279684] vma_prepare+0xc54/0x11a0 [ 31.280208] __split_vma+0x5af/0x950 [ 31.280749] ? __pfx___split_vma+0x10/0x10 [ 31.281355] ? find_held_lock+0x2c/0x110 [ 31.281946] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.282590] ? lock_is_held_type+0x9f/0x120 [ 31.283211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.283901] ? mtree_range_walk+0x632/0x900 [ 31.284535] ? mas_walk+0x5c7/0x7c0 [ 31.285074] do_vmi_munmap+0x1f1/0x2b0 [ 31.285629] mmap_region+0x1f9/0x2660 [ 31.286177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.286782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.287598] ? __pfx_lock_acquire+0x10/0x10 [ 31.288203] ? __pfx_mmap_region+0x10/0x10 [ 31.288810] ? security_mmap_addr+0x7d/0xa0 [ 31.289413] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290042] do_mmap+0x854/0xf00 [ 31.290541] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291102] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.291738] ksys_mmap_pgoff+0x3af/0x500 [ 31.292318] do_syscall_64+0x3f/0x90 [ 31.292858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293588] RIP: 0033:0x7f6693a98d82 [ 31.294100] 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 [ 31.296504] RSP: 002b:00007ffdc3c00ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6693a98d82 [ 31.298485] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6692ed2000 [ 31.299458] RBP: 00007f6692ed2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300412] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cbbff0980 [ 31.301369] R13: 00007ffdc3c00ae0 R14: 00007ffdc3c00b10 R15: 00007ffdc3c00e70 [ 31.302334] [ 31.302659] [ 31.302909] Allocated by task 213: [ 31.303388] kasan_save_stack+0x22/0x50 [ 31.303956] kasan_set_track+0x25/0x30 [ 31.304507] __kasan_slab_alloc+0x59/0x70 [ 31.305099] kmem_cache_alloc+0x16b/0x370 [ 31.305663] vm_area_dup+0x20/0x160 [ 31.306156] __split_vma+0x170/0x950 [ 31.306664] split_vma+0xc6/0x110 [ 31.307152] mprotect_fixup+0x8d2/0xb30 [ 31.307706] do_mprotect_pkey+0x87e/0xd40 [ 31.308272] __x64_sys_mprotect+0x78/0xc0 [ 31.308857] do_syscall_64+0x3f/0x90 [ 31.309389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310130] [ 31.310373] Freed by task 213: [ 31.310845] kasan_save_stack+0x22/0x50 [ 31.311467] kasan_set_track+0x25/0x30 [ 31.312021] kasan_save_free_info+0x2b/0x50 [ 31.312637] __kasan_slab_free+0x10a/0x190 [ 31.313252] kmem_cache_free+0x10d/0x4d0 [ 31.313827] rcu_core+0x8c8/0x2860 [ 31.314340] __do_softirq+0x1b7/0x7d4 [ 31.314901] [ 31.315147] Last potentially related work creation: [ 31.315818] kasan_save_stack+0x22/0x50 [ 31.316400] __kasan_record_aux_stack+0x8e/0xa0 [ 31.317061] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.317804] remove_vma+0x139/0x170 [ 31.318313] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.318968] do_vmi_munmap+0x1f1/0x2b0 [ 31.319527] __vm_munmap+0x138/0x3a0 [ 31.320045] __x64_sys_munmap+0x59/0x80 [ 31.320606] do_syscall_64+0x3f/0x90 [ 31.321134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321868] [ 31.322111] The buggy address belongs to the object at ffff88800d6ccd98 [ 31.322111] which belongs to the cache vm_area_struct of size 168 [ 31.323790] The buggy address is located 88 bytes inside of [ 31.323790] freed 168-byte region [ffff88800d6ccd98, ffff88800d6cce40) [ 31.325404] [ 31.325653] The buggy address belongs to the physical page: [ 31.326416] page:000000005dd37135 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6cc [ 31.327677] memcg:ffff88800cb27001 [ 31.328166] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.328910] page_type: 0xffffffff() [ 31.329427] raw: 0100000000000200 ffff8880087a0c80 ffffea000034f2c0 dead000000000004 [ 31.330481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb27001 [ 31.331542] page dumped because: kasan: bad access detected [ 31.332305] [ 31.332554] Memory state around the buggy address: [ 31.333218] ffff88800d6ccc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.334191] ffff88800d6ccd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.335158] >ffff88800d6ccd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.336120] ^ [ 31.337042] ffff88800d6cce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.338005] ffff88800d6cce80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.338975] ================================================================== [ 31.340096] Disabling lock debugging due to kernel taint [ 33.281797] BUG: Bad rss-counter state mm:000000005d3b846c type:MM_FILEPAGES val:33 [ 33.282851] BUG: Bad rss-counter state mm:000000005d3b846c type:MM_ANONPAGES val:22 [ 33.758683] BUG: Bad rss-counter state mm:00000000898280cb type:MM_FILEPAGES val:33 [ 33.760198] BUG: Bad rss-counter state mm:00000000898280cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6641' (ECDSA) to the list of known hosts. 2023/06/20 23:40:35 fuzzer started 2023/06/20 23:40:35 dialing manager at localhost:36067 2023/06/20 23:40:35 checking machine... 2023/06/20 23:40:35 checking revisions... [ 34.485250] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:40:35 testing simple program... [ 34.533975] cgroup: Unknown subsys name 'net' [ 34.571465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:40:35 Registers: info registers vcpu 0 RAX=0000000080010004 RBX=ffff8880090f8000 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff8880090f8180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff8880090fc4c8 R14=0000000000000000 R15=ffff8880090f8008 RIP=ffffffff8219168f RFL=00000046 [---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 00007f26fe5d8900 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=00007f26fd9c53d0 CR3=000000000cba6000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5442bb32a8f25dc100000000000ae988 XMM05=1008f72a6b6c638e0000000000132418 XMM06=4fda316b135da52b0000000000131148 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff8880090f8000 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000103f6 RSP=ffff888016b5f7d0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=0000000000000128 R12=00000000000103f6 R13=ffffed100121f001 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--S-A-C] 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=00007ffdd71492d8 CR3=000000001030c000 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=2034333a30343a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a30343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000