syzkaller login: [ 38.734635] BUG: Bad rss-counter state mm:0000000083068549 type:MM_FILEPAGES val:33 [ 38.735624] BUG: Bad rss-counter state mm:0000000083068549 type:MM_ANONPAGES val:22 [ 38.898772] ================================================================== [ 38.899663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.900585] Read of size 8 at addr ffff88800c7b05c8 by task sshd/218 [ 38.901347] [ 38.901729] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.902589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.903546] Call Trace: [ 38.903869] [ 38.904150] dump_stack_lvl+0x91/0xf0 [ 38.904637] print_report+0xcc/0x620 [ 38.905133] ? __virt_addr_valid+0x102/0x340 [ 38.905685] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906296] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906909] kasan_report+0xbe/0xf0 [ 38.907376] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907992] vma_interval_tree_remove+0xc75/0xec0 [ 38.908587] vma_prepare+0xc54/0x11a0 [ 38.909085] __split_vma+0x5af/0x950 [ 38.909552] ? __pfx___split_vma+0x10/0x10 [ 38.910082] ? find_held_lock+0x2c/0x110 [ 38.910599] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.911156] ? lock_is_held_type+0x9f/0x120 [ 38.911695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.912302] ? mtree_range_walk+0x632/0x900 [ 38.912852] ? mas_walk+0x5c7/0x7c0 [ 38.913343] do_vmi_munmap+0x1f1/0x2b0 [ 38.913834] mmap_region+0x1f9/0x2660 [ 38.914316] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.914823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.915526] ? __pfx_lock_acquire+0x10/0x10 [ 38.916063] ? __pfx_mmap_region+0x10/0x10 [ 38.916588] ? security_mmap_addr+0x7d/0xa0 [ 38.917135] ? get_unmapped_area+0x1f5/0x3f0 [ 38.917685] do_mmap+0x854/0xf00 [ 38.918123] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.919171] ksys_mmap_pgoff+0x3af/0x500 [ 38.919673] do_syscall_64+0x3f/0x90 [ 38.920154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920796] RIP: 0033:0x7f12f4e0cd82 [ 38.921265] 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 [ 38.923372] RSP: 002b:00007ffd463732a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.924275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12f4e0cd82 [ 38.925128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12f4246000 [ 38.925975] RBP: 00007f12f4246000 R08: 0000000000000009 R09: 0000000000001000 [ 38.926816] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b56950ec0 [ 38.927649] R13: 00007ffd463732c0 R14: 00007ffd463732f0 R15: 00007ffd46373650 [ 38.928509] [ 38.928803] [ 38.929041] Allocated by task 211: [ 38.929466] kasan_save_stack+0x22/0x50 [ 38.929972] kasan_set_track+0x25/0x30 [ 38.930470] __kasan_slab_alloc+0x59/0x70 [ 38.930987] kmem_cache_alloc+0x16b/0x370 [ 38.931497] vm_area_dup+0x20/0x160 [ 38.931952] __split_vma+0x170/0x950 [ 38.932417] split_vma+0xc6/0x110 [ 38.932859] mprotect_fixup+0x8d2/0xb30 [ 38.933372] do_mprotect_pkey+0x87e/0xd40 [ 38.933895] __x64_sys_mprotect+0x78/0xc0 [ 38.934420] do_syscall_64+0x3f/0x90 [ 38.934890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935529] [ 38.935745] Freed by task 211: [ 38.936141] kasan_save_stack+0x22/0x50 [ 38.936636] kasan_set_track+0x25/0x30 [ 38.937140] kasan_save_free_info+0x2b/0x50 [ 38.937671] __kasan_slab_free+0x10a/0x190 [ 38.938201] kmem_cache_free+0x10d/0x4d0 [ 38.938703] rcu_core+0x8c8/0x2860 [ 38.939144] __do_softirq+0x1b7/0x7d4 [ 38.939625] [ 38.939837] Last potentially related work creation: [ 38.940423] kasan_save_stack+0x22/0x50 [ 38.940928] __kasan_record_aux_stack+0x8e/0xa0 [ 38.941506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942147] remove_vma+0x139/0x170 [ 38.942654] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943207] do_vmi_munmap+0x1f1/0x2b0 [ 38.943688] __vm_munmap+0x138/0x3a0 [ 38.944149] __x64_sys_munmap+0x59/0x80 [ 38.944638] do_syscall_64+0x3f/0x90 [ 38.945137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945771] [ 38.945987] The buggy address belongs to the object at ffff88800c7b0570 [ 38.945987] which belongs to the cache vm_area_struct of size 168 [ 38.947450] The buggy address is located 88 bytes inside of [ 38.947450] freed 168-byte region [ffff88800c7b0570, ffff88800c7b0618) [ 38.948832] [ 38.949059] The buggy address belongs to the physical page: [ 38.949713] page:0000000021263f13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b0 [ 38.950817] memcg:ffff88800db38301 [ 38.951244] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.951890] page_type: 0xffffffff() [ 38.952336] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.953264] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db38301 [ 38.954160] page dumped because: kasan: bad access detected [ 38.954813] [ 38.955028] Memory state around the buggy address: [ 38.955615] ffff88800c7b0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.956467] ffff88800c7b0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.957329] >ffff88800c7b0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.958186] ^ [ 38.958844] ffff88800c7b0600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.959714] ffff88800c7b0680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.960571] ================================================================== [ 38.961509] Disabling lock debugging due to kernel taint [ 41.651936] BUG: Bad rss-counter state mm:00000000b3792b9c type:MM_FILEPAGES val:33 [ 41.653249] BUG: Bad rss-counter state mm:00000000b3792b9c type:MM_ANONPAGES val:22 [ 42.132235] BUG: Bad rss-counter state mm:0000000037b51067 type:MM_FILEPAGES val:33 [ 42.133241] BUG: Bad rss-counter state mm:0000000037b51067 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51536' (ECDSA) to the list of known hosts. 2023/06/20 21:54:39 fuzzer started 2023/06/20 21:54:39 dialing manager at localhost:36067 2023/06/20 21:54:39 checking machine... 2023/06/20 21:54:39 checking revisions... [ 42.891524] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:54:40 testing simple program... [ 42.948136] cgroup: Unknown subsys name 'net' [ 43.025753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:54:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009b65800 RCX=1ffffffff0ba7c92 RDX=1ffff11001e5c42e RSI=0000000000000008 RDI=ffff88800f2e2130 RBP=ffff88800f2e2130 RSP=ffff88800fea7a18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008fae280 R13=ffff88800f2e2170 R14=ffffffff83675648 R15=0000000000000001 RIP=ffffffff81846821 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbae5da7900 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=00007fff57742000 CR3=000000000f11c000 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=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 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=0000000000000001 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=00007f21baf88000 CR3=0000000013b20000 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=4c1bdecde1b6e7b6984868bb6227bb93 XMM02=000000000011b728ec2efd57dc4c00df XMM03=00000000001224d0fc12aa4db29331e8 XMM04=92c3a89a84855b0300000000000ae988 XMM05=19e9129bd510f2350000000000132a58 XMM06=4fda316b135da52b00000000001328e0 XMM07=e042d86d42eb936e00000000001227a8 XMM08=fc12aa4db29331e8000000000011b788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000