syzkaller login: [ 30.485605] BUG: Bad rss-counter state mm:0000000008cc212b type:MM_FILEPAGES val:33 [ 30.486855] BUG: Bad rss-counter state mm:0000000008cc212b type:MM_ANONPAGES val:22 [ 30.624180] ================================================================== [ 30.625066] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.625939] Read of size 8 at addr ffff8880146f94e0 by task sshd/221 [ 30.626657] [ 30.626866] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.627816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.628776] Call Trace: [ 30.629101] [ 30.629371] dump_stack_lvl+0x91/0xf0 [ 30.629838] print_report+0xcc/0x620 [ 30.630329] ? __virt_addr_valid+0x102/0x340 [ 30.630847] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.631427] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.632009] kasan_report+0xbe/0xf0 [ 30.632458] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.633052] vma_interval_tree_remove+0xc75/0xec0 [ 30.633623] vma_prepare+0xc54/0x11a0 [ 30.634074] __split_vma+0x5af/0x950 [ 30.634518] ? __pfx___split_vma+0x10/0x10 [ 30.635016] ? find_held_lock+0x2c/0x110 [ 30.635511] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.636039] ? lock_is_held_type+0x9f/0x120 [ 30.636551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.637130] ? mtree_range_walk+0x632/0x900 [ 30.637652] ? mas_walk+0x5c7/0x7c0 [ 30.638104] do_vmi_munmap+0x1f1/0x2b0 [ 30.638573] mmap_region+0x1f9/0x2660 [ 30.639028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.639512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.640179] ? __pfx_lock_acquire+0x10/0x10 [ 30.640686] ? __pfx_mmap_region+0x10/0x10 [ 30.641211] ? security_mmap_addr+0x7d/0xa0 [ 30.641710] ? get_unmapped_area+0x1f5/0x3f0 [ 30.642228] do_mmap+0x854/0xf00 [ 30.642646] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.643112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.643643] ksys_mmap_pgoff+0x3af/0x500 [ 30.644122] do_syscall_64+0x3f/0x90 [ 30.644576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.645194] RIP: 0033:0x7fbaeadbbd82 [ 30.645623] 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 [ 30.647607] RSP: 002b:00007ffc48bd49a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.648457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbaeadbbd82 [ 30.649265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbaea1f5000 [ 30.650059] RBP: 00007fbaea1f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.650853] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620e7c49ec0 [ 30.651647] R13: 00007ffc48bd49c0 R14: 00007ffc48bd49f0 R15: 00007ffc48bd4d50 [ 30.652452] [ 30.652726] [ 30.652949] Allocated by task 214: [ 30.653373] kasan_save_stack+0x22/0x50 [ 30.653873] kasan_set_track+0x25/0x30 [ 30.654365] __kasan_slab_alloc+0x59/0x70 [ 30.654877] kmem_cache_alloc+0x16b/0x370 [ 30.655395] vm_area_dup+0x20/0x160 [ 30.655852] __split_vma+0x170/0x950 [ 30.656321] split_vma+0xc6/0x110 [ 30.656760] mprotect_fixup+0x8d2/0xb30 [ 30.657261] do_mprotect_pkey+0x87e/0xd40 [ 30.657775] __x64_sys_mprotect+0x78/0xc0 [ 30.658294] do_syscall_64+0x3f/0x90 [ 30.658768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659402] [ 30.659614] Freed by task 214: [ 30.659993] kasan_save_stack+0x22/0x50 [ 30.660492] kasan_set_track+0x25/0x30 [ 30.661000] kasan_save_free_info+0x2b/0x50 [ 30.661525] __kasan_slab_free+0x10a/0x190 [ 30.662054] kmem_cache_free+0x10d/0x4d0 [ 30.662554] rcu_core+0x8c8/0x2860 [ 30.662996] __do_softirq+0x1b7/0x7d4 [ 30.663468] [ 30.663680] Last potentially related work creation: [ 30.664264] kasan_save_stack+0x22/0x50 [ 30.664770] __kasan_record_aux_stack+0x8e/0xa0 [ 30.665343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.665990] remove_vma+0x139/0x170 [ 30.666450] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.667000] do_vmi_munmap+0x1f1/0x2b0 [ 30.667477] __vm_munmap+0x138/0x3a0 [ 30.667943] __x64_sys_munmap+0x59/0x80 [ 30.668435] do_syscall_64+0x3f/0x90 [ 30.669019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.669661] [ 30.669874] The buggy address belongs to the object at ffff8880146f9488 [ 30.669874] which belongs to the cache vm_area_struct of size 168 [ 30.671331] The buggy address is located 88 bytes inside of [ 30.671331] freed 168-byte region [ffff8880146f9488, ffff8880146f9530) [ 30.672738] [ 30.672975] The buggy address belongs to the physical page: [ 30.673632] page:000000008922d2b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146f9 [ 30.674707] memcg:ffff888016b85a01 [ 30.675131] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.675775] page_type: 0xffffffff() [ 30.676232] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.677138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b85a01 [ 30.678031] page dumped because: kasan: bad access detected [ 30.678689] [ 30.678900] Memory state around the buggy address: [ 30.679487] ffff8880146f9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.680324] ffff8880146f9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.681164] >ffff8880146f9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.682006] ^ [ 30.682759] ffff8880146f9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.683601] ffff8880146f9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.684443] ================================================================== [ 30.685501] Disabling lock debugging due to kernel taint [ 32.720230] BUG: Bad rss-counter state mm:000000000cab6534 type:MM_FILEPAGES val:33 [ 32.721425] BUG: Bad rss-counter state mm:000000000cab6534 type:MM_ANONPAGES val:22 [ 33.172133] BUG: Bad rss-counter state mm:00000000c046074c type:MM_FILEPAGES val:33 [ 33.173317] BUG: Bad rss-counter state mm:00000000c046074c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32245' (ECDSA) to the list of known hosts. 2023/06/21 07:46:23 fuzzer started 2023/06/21 07:46:24 dialing manager at localhost:36067 2023/06/21 07:46:24 checking machine... 2023/06/21 07:46:24 checking revisions... [ 33.814714] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:46:24 testing simple program... [ 33.859754] cgroup: Unknown subsys name 'net' [ 33.919537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:23 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888016837428 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=0000000000000000 RIP=ffffffff8180f0a8 RFL=00000283 [--S---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 00007f977d688900 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=00007f977dc3f618 CR3=000000000fe60000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f80d492ebe0 CR3=000000000cace000 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=441913aa1ca50aadf44afe0e2bff74cb XMM02=2c67c8bc2e329bc3000000000011b7d0 XMM03=fb795ef6d657705600000000001225b0 XMM04=185314d975f5181300000000000ae988 XMM05=e4cb8bb95a7664b60000000000132428 XMM06=a9e21cc3585163180000000000131290 XMM07=e042d86d42eb936e0000000000122830 XMM08=e53b012fd91c91d2000000000011b830 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000