syzkaller login: [ 30.677058] BUG: Bad rss-counter state mm:0000000039aed150 type:MM_FILEPAGES val:33 [ 30.678869] BUG: Bad rss-counter state mm:0000000039aed150 type:MM_ANONPAGES val:22 [ 30.853577] ================================================================== [ 30.854688] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.855839] Read of size 8 at addr ffff888016982a50 by task sshd/219 [ 30.856918] [ 30.857194] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859258] Call Trace: [ 30.859582] [ 30.859870] dump_stack_lvl+0x91/0xf0 [ 30.860381] print_report+0xcc/0x620 [ 30.860879] ? __virt_addr_valid+0x102/0x340 [ 30.861458] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862717] kasan_report+0xbe/0xf0 [ 30.863207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863833] vma_interval_tree_remove+0xc75/0xec0 [ 30.864443] vma_prepare+0xc54/0x11a0 [ 30.864927] __split_vma+0x5af/0x950 [ 30.865413] ? __pfx___split_vma+0x10/0x10 [ 30.865949] ? find_held_lock+0x2c/0x110 [ 30.866483] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867055] ? lock_is_held_type+0x9f/0x120 [ 30.867601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868216] ? mtree_range_walk+0x632/0x900 [ 30.868777] ? mas_walk+0x5c7/0x7c0 [ 30.869267] do_vmi_munmap+0x1f1/0x2b0 [ 30.869789] mmap_region+0x1f9/0x2660 [ 30.870276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.870792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871523] ? __pfx_lock_acquire+0x10/0x10 [ 30.872067] ? __pfx_mmap_region+0x10/0x10 [ 30.872615] ? security_mmap_addr+0x7d/0xa0 [ 30.873191] ? get_unmapped_area+0x1f5/0x3f0 [ 30.873783] do_mmap+0x854/0xf00 [ 30.874234] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.874740] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875310] ksys_mmap_pgoff+0x3af/0x500 [ 30.875827] do_syscall_64+0x3f/0x90 [ 30.876326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876990] RIP: 0033:0x7fa4db805d82 [ 30.877472] 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 [ 30.879622] RSP: 002b:00007ffdfa99a3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.880548] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4db805d82 [ 30.881423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4dac3f000 [ 30.882288] RBP: 00007fa4dac3f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.883147] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c36e566b20 [ 30.883997] R13: 00007ffdfa99a3e0 R14: 00007ffdfa99a410 R15: 00007ffdfa99a770 [ 30.884866] [ 30.885171] [ 30.885409] Allocated by task 212: [ 30.885846] kasan_save_stack+0x22/0x50 [ 30.886357] kasan_set_track+0x25/0x30 [ 30.886862] __kasan_slab_alloc+0x59/0x70 [ 30.887399] kmem_cache_alloc+0x16b/0x370 [ 30.887922] vm_area_dup+0x20/0x160 [ 30.888388] __split_vma+0x170/0x950 [ 30.888866] split_vma+0xc6/0x110 [ 30.889315] mprotect_fixup+0x8d2/0xb30 [ 30.889841] do_mprotect_pkey+0x87e/0xd40 [ 30.890448] __x64_sys_mprotect+0x78/0xc0 [ 30.891096] do_syscall_64+0x3f/0x90 [ 30.891679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.892470] [ 30.892734] Freed by task 212: [ 30.893216] kasan_save_stack+0x22/0x50 [ 30.893847] kasan_set_track+0x25/0x30 [ 30.894452] kasan_save_free_info+0x2b/0x50 [ 30.895108] __kasan_slab_free+0x10a/0x190 [ 30.895772] kmem_cache_free+0x10d/0x4d0 [ 30.896389] rcu_core+0x8c8/0x2860 [ 30.896931] __do_softirq+0x1b7/0x7d4 [ 30.897654] [ 30.897916] Last potentially related work creation: [ 30.898631] kasan_save_stack+0x22/0x50 [ 30.899257] __kasan_record_aux_stack+0x8e/0xa0 [ 30.899968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.900751] remove_vma+0x139/0x170 [ 30.901309] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902012] do_vmi_munmap+0x1f1/0x2b0 [ 30.902620] __vm_munmap+0x138/0x3a0 [ 30.903199] __x64_sys_munmap+0x59/0x80 [ 30.903804] do_syscall_64+0x3f/0x90 [ 30.904393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905182] [ 30.905456] The buggy address belongs to the object at ffff8880169829f8 [ 30.905456] which belongs to the cache vm_area_struct of size 168 [ 30.907249] The buggy address is located 88 bytes inside of [ 30.907249] freed 168-byte region [ffff8880169829f8, ffff888016982aa0) [ 30.908964] [ 30.909229] The buggy address belongs to the physical page: [ 30.910045] page:00000000851a86a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16982 [ 30.911384] memcg:ffff88800d619101 [ 30.911900] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.912686] page_type: 0xffffffff() [ 30.913232] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.914354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d619101 [ 30.915458] page dumped because: kasan: bad access detected [ 30.916262] [ 30.916517] Memory state around the buggy address: [ 30.917210] ffff888016982900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.918246] ffff888016982980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.919284] >ffff888016982a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.920320] ^ [ 30.921155] ffff888016982a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.922161] ffff888016982b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923137] ================================================================== [ 30.924236] Disabling lock debugging due to kernel taint [ 33.225367] BUG: Bad rss-counter state mm:00000000bbfe1aba type:MM_FILEPAGES val:33 [ 33.226547] BUG: Bad rss-counter state mm:00000000bbfe1aba type:MM_ANONPAGES val:22 [ 33.823264] BUG: Bad rss-counter state mm:000000007221c1df type:MM_FILEPAGES val:33 [ 33.824525] BUG: Bad rss-counter state mm:000000007221c1df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40245' (ECDSA) to the list of known hosts. 2023/06/20 11:40:10 fuzzer started 2023/06/20 11:40:10 dialing manager at localhost:36067 2023/06/20 11:40:10 checking machine... 2023/06/20 11:40:10 checking revisions... [ 34.484896] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:40:11 testing simple program... [ 34.533408] cgroup: Unknown subsys name 'net' [ 34.571798] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:10 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff8880182c7b50 RSP=ffff8880182c7a80 R8 =0000000000000001 R9 =ffffed1003058f5c R10=ffff8880182c7ae7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f9853d10700 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=00007f53c218c650 CR3=000000000e468000 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=30343a3131203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732030313a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383530 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000002 RCX=ffffffff81809a90 RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000000 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff8113078b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4aba33c900 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=00007f4ab975feb0 CR3=000000000d628000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7191ac18d443b5aa00000000000ae988 XMM05=d29bb536a287b15c0000000000132670 XMM06=dfcdbad4f1609c3700000000001317d8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000