syzkaller login: [ 38.730839] BUG: Bad rss-counter state mm:00000000ef4b8506 type:MM_FILEPAGES val:33 [ 38.732257] BUG: Bad rss-counter state mm:00000000ef4b8506 type:MM_ANONPAGES val:22 [ 38.906293] ================================================================== [ 38.907215] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.908179] Read of size 8 at addr ffff88800fd9b310 by task sshd/225 [ 38.908967] [ 38.909197] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.910230] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.911200] Call Trace: [ 38.911525] [ 38.911987] dump_stack_lvl+0x91/0xf0 [ 38.912571] print_report+0xcc/0x620 [ 38.913160] ? __virt_addr_valid+0x102/0x340 [ 38.913822] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914562] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915328] kasan_report+0xbe/0xf0 [ 38.915918] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916693] vma_interval_tree_remove+0xc75/0xec0 [ 38.917450] vma_prepare+0xc54/0x11a0 [ 38.918052] __split_vma+0x5af/0x950 [ 38.918643] ? __pfx___split_vma+0x10/0x10 [ 38.919304] ? find_held_lock+0x2c/0x110 [ 38.919957] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.920644] ? lock_is_held_type+0x9f/0x120 [ 38.921344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.922040] ? mtree_range_walk+0x632/0x900 [ 38.922586] ? mas_walk+0x5c7/0x7c0 [ 38.923072] do_vmi_munmap+0x1f1/0x2b0 [ 38.923563] mmap_region+0x1f9/0x2660 [ 38.924047] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.924558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.925275] ? __pfx_lock_acquire+0x10/0x10 [ 38.925810] ? __pfx_mmap_region+0x10/0x10 [ 38.926336] ? security_mmap_addr+0x7d/0xa0 [ 38.926869] ? get_unmapped_area+0x1f5/0x3f0 [ 38.927422] do_mmap+0x854/0xf00 [ 38.927858] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.928348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.928907] ksys_mmap_pgoff+0x3af/0x500 [ 38.929427] do_syscall_64+0x3f/0x90 [ 38.929914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930560] RIP: 0033:0x7f7636553d82 [ 38.931021] 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 [ 38.933162] RSP: 002b:00007fffe2183c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.934072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7636553d82 [ 38.934916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f763598d000 [ 38.935763] RBP: 00007f763598d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.936617] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560231adcd90 [ 38.937490] R13: 00007fffe2183c60 R14: 00007fffe2183c90 R15: 00007fffe2183ff0 [ 38.938348] [ 38.938642] [ 38.938860] Allocated by task 218: [ 38.939291] kasan_save_stack+0x22/0x50 [ 38.939794] kasan_set_track+0x25/0x30 [ 38.940301] __kasan_slab_alloc+0x59/0x70 [ 38.940837] kmem_cache_alloc+0x16b/0x370 [ 38.941372] vm_area_dup+0x20/0x160 [ 38.941833] __split_vma+0x170/0x950 [ 38.942311] split_vma+0xc6/0x110 [ 38.942759] mprotect_fixup+0x8d2/0xb30 [ 38.943280] do_mprotect_pkey+0x87e/0xd40 [ 38.943809] __x64_sys_mprotect+0x78/0xc0 [ 38.944338] do_syscall_64+0x3f/0x90 [ 38.944816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945488] [ 38.945707] Freed by task 218: [ 38.946100] kasan_save_stack+0x22/0x50 [ 38.946606] kasan_set_track+0x25/0x30 [ 38.947109] kasan_save_free_info+0x2b/0x50 [ 38.947651] __kasan_slab_free+0x10a/0x190 [ 38.948204] kmem_cache_free+0x10d/0x4d0 [ 38.948722] rcu_core+0x8c8/0x2860 [ 38.949188] __do_softirq+0x1b7/0x7d4 [ 38.949674] [ 38.949902] Last potentially related work creation: [ 38.950596] kasan_save_stack+0x22/0x50 [ 38.951110] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952374] remove_vma+0x139/0x170 [ 38.952837] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953430] do_vmi_munmap+0x1f1/0x2b0 [ 38.953922] __vm_munmap+0x138/0x3a0 [ 38.954402] __x64_sys_munmap+0x59/0x80 [ 38.954896] do_syscall_64+0x3f/0x90 [ 38.955394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956045] [ 38.956263] The buggy address belongs to the object at ffff88800fd9b2b8 [ 38.956263] which belongs to the cache vm_area_struct of size 168 [ 38.957747] The buggy address is located 88 bytes inside of [ 38.957747] freed 168-byte region [ffff88800fd9b2b8, ffff88800fd9b360) [ 38.959151] [ 38.959371] The buggy address belongs to the physical page: [ 38.960032] page:00000000a3e8d98d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd9b [ 38.961122] memcg:ffff88800fd0a701 [ 38.961550] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962206] page_type: 0xffffffff() [ 38.962672] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.963603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd0a701 [ 38.964519] page dumped because: kasan: bad access detected [ 38.965198] [ 38.965417] Memory state around the buggy address: [ 38.966024] ffff88800fd9b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.966879] ffff88800fd9b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.967741] >ffff88800fd9b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.968616] ^ [ 38.969084] ffff88800fd9b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.969953] ffff88800fd9b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.970823] ================================================================== [ 38.971760] Disabling lock debugging due to kernel taint [ 41.712725] BUG: Bad rss-counter state mm:00000000ae15f443 type:MM_FILEPAGES val:33 [ 41.713880] BUG: Bad rss-counter state mm:00000000ae15f443 type:MM_ANONPAGES val:22 [ 42.152852] BUG: Bad rss-counter state mm:00000000b72ab2ae type:MM_FILEPAGES val:33 [ 42.154369] BUG: Bad rss-counter state mm:00000000b72ab2ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7046' (ECDSA) to the list of known hosts. 2023/06/20 19:27:56 fuzzer started 2023/06/20 19:27:56 dialing manager at localhost:36067 2023/06/20 19:27:56 checking machine... 2023/06/20 19:27:56 checking revisions... [ 42.877853] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:27:57 testing simple program... [ 42.929228] cgroup: Unknown subsys name 'net' [ 42.983999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:27:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016b5d1c0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888016b5d5b4 RBP=ffff888016b5d1c0 RSP=ffff88806ce09de8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8780 R13=ffffea000036bf80 R14=ffffffff8186b835 R15=ffff88800ef95c00 RIP=ffffffff8135bdea RFL=00000213 [----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 00007f7e578f8900 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=00007f7e56d16630 CR3=000000000cb08000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=df69f6ab1fd9effb00000000000ae988 XMM05=5967e119697f02df0000000000132868 XMM06=20274e6bb45ff85e0000000000130bb8 XMM07=fb795ef6d657705600000000001210e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=7373656363757300 RBX=0000000000000000 RCX=0000000000000000 RDX=ffffed10018f36df RSI=00007fff74ab9634 RDI=ffff88800c79b6f4 RBP=00007fff74ab9540 RSP=ffff888015b27a80 R8 =223d657865202274 R9 =6962732f7273752f R10=2022646873732f6e R11=656d616e74736f68 R12=ffff88800c79b600 R13=00007fff74ab9634 R14=0000000000000000 R15=ffff888015b27d90 RIP=ffffffff82157dbe RFL=00000247 [---Z-PC] 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 00007f18ca621900 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=00007fff74aba000 CR3=000000000eba8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000