syzkaller login: [ 68.762786] BUG: Bad rss-counter state mm:0000000091488d10 type:MM_FILEPAGES val:33 [ 68.764000] BUG: Bad rss-counter state mm:0000000091488d10 type:MM_ANONPAGES val:22 [ 68.924298] ================================================================== [ 68.925403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.926730] Read of size 8 at addr ffff88800d9536b0 by task sshd/228 [ 68.927633] [ 68.927895] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.928915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.929896] Call Trace: [ 68.930218] [ 68.930513] dump_stack_lvl+0x91/0xf0 [ 68.931012] print_report+0xcc/0x620 [ 68.931498] ? __virt_addr_valid+0x102/0x340 [ 68.932055] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.932682] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.933306] kasan_report+0xbe/0xf0 [ 68.933786] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.934420] vma_interval_tree_remove+0xc75/0xec0 [ 68.935023] vma_prepare+0xc54/0x11a0 [ 68.935497] __split_vma+0x5af/0x950 [ 68.935967] ? __pfx___split_vma+0x10/0x10 [ 68.936493] ? find_held_lock+0x2c/0x110 [ 68.937045] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.937609] ? lock_is_held_type+0x9f/0x120 [ 68.938147] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.938777] ? mtree_range_walk+0x632/0x900 [ 68.939329] ? mas_walk+0x5c7/0x7c0 [ 68.939811] do_vmi_munmap+0x1f1/0x2b0 [ 68.940301] mmap_region+0x1f9/0x2660 [ 68.940789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.941306] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.942034] ? __pfx_lock_acquire+0x10/0x10 [ 68.942579] ? __pfx_mmap_region+0x10/0x10 [ 68.943118] ? security_mmap_addr+0x7d/0xa0 [ 68.943655] ? get_unmapped_area+0x1f5/0x3f0 [ 68.944207] do_mmap+0x854/0xf00 [ 68.944647] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.945141] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.945701] ksys_mmap_pgoff+0x3af/0x500 [ 68.946230] do_syscall_64+0x3f/0x90 [ 68.946776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.947429] RIP: 0033:0x7f892d9add82 [ 68.947898] 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 [ 68.950039] RSP: 002b:00007fff90b32c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.950967] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f892d9add82 [ 68.951826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f892cde7000 [ 68.952678] RBP: 00007f892cde7000 R08: 0000000000000009 R09: 0000000000001000 [ 68.953524] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0ee2f6ec0 [ 68.954385] R13: 00007fff90b32c80 R14: 00007fff90b32cb0 R15: 00007fff90b33010 [ 68.955246] [ 68.955539] [ 68.955758] Allocated by task 220: [ 68.956194] kasan_save_stack+0x22/0x50 [ 68.956700] kasan_set_track+0x25/0x30 [ 68.957195] __kasan_slab_alloc+0x59/0x70 [ 68.957723] kmem_cache_alloc+0x16b/0x370 [ 68.958243] vm_area_dup+0x20/0x160 [ 68.958729] __split_vma+0x170/0x950 [ 68.959195] split_vma+0xc6/0x110 [ 68.959635] mprotect_fixup+0x8d2/0xb30 [ 68.960140] do_mprotect_pkey+0x87e/0xd40 [ 68.960663] __x64_sys_mprotect+0x78/0xc0 [ 68.961183] do_syscall_64+0x3f/0x90 [ 68.961662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.962314] [ 68.962534] Freed by task 220: [ 68.962930] kasan_save_stack+0x22/0x50 [ 68.963440] kasan_set_track+0x25/0x30 [ 68.963937] kasan_save_free_info+0x2b/0x50 [ 68.964470] __kasan_slab_free+0x10a/0x190 [ 68.965010] kmem_cache_free+0x10d/0x4d0 [ 68.965517] rcu_core+0x8c8/0x2860 [ 68.965972] __do_softirq+0x1b7/0x7d4 [ 68.966462] [ 68.966677] Last potentially related work creation: [ 68.967363] kasan_save_stack+0x22/0x50 [ 68.967873] __kasan_record_aux_stack+0x8e/0xa0 [ 68.968447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.969095] remove_vma+0x139/0x170 [ 68.969550] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.970109] do_vmi_munmap+0x1f1/0x2b0 [ 68.970607] __vm_munmap+0x138/0x3a0 [ 68.971079] __x64_sys_munmap+0x59/0x80 [ 68.971580] do_syscall_64+0x3f/0x90 [ 68.972063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.972711] [ 68.972927] The buggy address belongs to the object at ffff88800d953658 [ 68.972927] which belongs to the cache vm_area_struct of size 168 [ 68.974406] The buggy address is located 88 bytes inside of [ 68.974406] freed 168-byte region [ffff88800d953658, ffff88800d953700) [ 68.975812] [ 68.976028] The buggy address belongs to the physical page: [ 68.976691] page:0000000082fc6f85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd953 [ 68.977773] memcg:ffff88800ee50e01 [ 68.978204] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.978867] page_type: 0xffffffff() [ 68.979328] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.980271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee50e01 [ 68.981201] page dumped because: kasan: bad access detected [ 68.981863] [ 68.982081] Memory state around the buggy address: [ 68.982665] ffff88800d953580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.983542] ffff88800d953600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 68.984418] >ffff88800d953680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.985261] ^ [ 68.985837] ffff88800d953700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 68.986699] ffff88800d953780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 68.987541] ================================================================== [ 68.988579] Disabling lock debugging due to kernel taint [ 71.561488] BUG: Bad rss-counter state mm:000000007d5c9a92 type:MM_FILEPAGES val:33 [ 71.562498] BUG: Bad rss-counter state mm:000000007d5c9a92 type:MM_ANONPAGES val:22 [ 72.106727] BUG: Bad rss-counter state mm:00000000e51bd68f type:MM_FILEPAGES val:33 [ 72.107735] BUG: Bad rss-counter state mm:00000000e51bd68f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11857' (ECDSA) to the list of known hosts. 2023/06/20 22:20:25 fuzzer started 2023/06/20 22:20:26 dialing manager at localhost:36067 2023/06/20 22:20:26 checking machine... 2023/06/20 22:20:26 checking revisions... [ 72.820847] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:20:26 testing simple program... [ 72.863812] cgroup: Unknown subsys name 'net' [ 72.918267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:20:25 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000024459fec RCX=ffff88806c6cff60 RDX=000000000000000e RSI=0000000000000001 RDI=000000008d801b53 RBP=ffff88800f309190 RSP=ffff88800fe9f460 R8 =00000000959dfb2e R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fe9f4c8 R15=000000000000000e RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f6602f56900 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=00007f660350d618 CR3=000000000dbfc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81809add RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e28 RDI=ffff88806cf09e28 RBP=ffff88806cf09af0 RSP=ffff88806cf09a20 R8 =ffffffff86138f56 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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=00007fad59336000 CR3=0000000016736000 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=30323a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3833325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343633 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000