syzkaller login: [ 38.739104] BUG: Bad rss-counter state mm:00000000d82d2be3 type:MM_FILEPAGES val:33 [ 38.740658] BUG: Bad rss-counter state mm:00000000d82d2be3 type:MM_ANONPAGES val:22 [ 38.909450] ================================================================== [ 38.910559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.911698] Read of size 8 at addr ffff88800fe1f6b0 by task sshd/225 [ 38.912779] [ 38.913056] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.914118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.915313] Call Trace: [ 38.915702] [ 38.916054] dump_stack_lvl+0x91/0xf0 [ 38.916677] print_report+0xcc/0x620 [ 38.917255] ? __virt_addr_valid+0x102/0x340 [ 38.917834] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918461] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919106] kasan_report+0xbe/0xf0 [ 38.919597] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920246] vma_interval_tree_remove+0xc75/0xec0 [ 38.920877] vma_prepare+0xc54/0x11a0 [ 38.921376] __split_vma+0x5af/0x950 [ 38.921874] ? __pfx___split_vma+0x10/0x10 [ 38.922427] ? find_held_lock+0x2c/0x110 [ 38.922953] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.923526] ? lock_is_held_type+0x9f/0x120 [ 38.924068] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.924682] ? mtree_range_walk+0x632/0x900 [ 38.925232] ? mas_walk+0x5c7/0x7c0 [ 38.925717] do_vmi_munmap+0x1f1/0x2b0 [ 38.926209] mmap_region+0x1f9/0x2660 [ 38.926690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.927203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.927916] ? __pfx_lock_acquire+0x10/0x10 [ 38.928472] ? __pfx_mmap_region+0x10/0x10 [ 38.929003] ? security_mmap_addr+0x7d/0xa0 [ 38.929533] ? get_unmapped_area+0x1f5/0x3f0 [ 38.930083] do_mmap+0x854/0xf00 [ 38.930636] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.931142] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.931713] ksys_mmap_pgoff+0x3af/0x500 [ 38.932223] do_syscall_64+0x3f/0x90 [ 38.932726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933379] RIP: 0033:0x7fd5b85d5d82 [ 38.933839] 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 [ 38.935956] RSP: 002b:00007fffcaad8488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.936883] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5b85d5d82 [ 38.937728] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5b7a0f000 [ 38.938576] RBP: 00007fd5b7a0f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.939419] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eaee97df70 [ 38.940264] R13: 00007fffcaad84a0 R14: 00007fffcaad84d0 R15: 00007fffcaad8830 [ 38.941133] [ 38.941430] [ 38.941648] Allocated by task 218: [ 38.942079] kasan_save_stack+0x22/0x50 [ 38.942585] kasan_set_track+0x25/0x30 [ 38.943080] __kasan_slab_alloc+0x59/0x70 [ 38.943602] kmem_cache_alloc+0x16b/0x370 [ 38.944119] vm_area_dup+0x20/0x160 [ 38.944582] __split_vma+0x170/0x950 [ 38.945050] split_vma+0xc6/0x110 [ 38.945497] mprotect_fixup+0x8d2/0xb30 [ 38.946001] do_mprotect_pkey+0x87e/0xd40 [ 38.946522] __x64_sys_mprotect+0x78/0xc0 [ 38.947045] do_syscall_64+0x3f/0x90 [ 38.947523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948167] [ 38.948394] Freed by task 218: [ 38.948825] kasan_save_stack+0x22/0x50 [ 38.949333] kasan_set_track+0x25/0x30 [ 38.949831] kasan_save_free_info+0x2b/0x50 [ 38.950374] __kasan_slab_free+0x10a/0x190 [ 38.950941] kmem_cache_free+0x10d/0x4d0 [ 38.951463] rcu_core+0x8c8/0x2860 [ 38.951923] __do_softirq+0x1b7/0x7d4 [ 38.952423] [ 38.952651] Last potentially related work creation: [ 38.953270] kasan_save_stack+0x22/0x50 [ 38.953863] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.955147] remove_vma+0x139/0x170 [ 38.955618] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.956181] do_vmi_munmap+0x1f1/0x2b0 [ 38.956696] __vm_munmap+0x138/0x3a0 [ 38.957172] __x64_sys_munmap+0x59/0x80 [ 38.957662] do_syscall_64+0x3f/0x90 [ 38.958142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958789] [ 38.959006] The buggy address belongs to the object at ffff88800fe1f658 [ 38.959006] which belongs to the cache vm_area_struct of size 168 [ 38.960546] The buggy address is located 88 bytes inside of [ 38.960546] freed 168-byte region [ffff88800fe1f658, ffff88800fe1f700) [ 38.962033] [ 38.962255] The buggy address belongs to the physical page: [ 38.962926] page:000000000bbb0223 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe1f [ 38.963998] memcg:ffff88801685a701 [ 38.964438] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.965103] page_type: 0xffffffff() [ 38.965564] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.966486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801685a701 [ 38.967388] page dumped because: kasan: bad access detected [ 38.968039] [ 38.968256] Memory state around the buggy address: [ 38.968841] ffff88800fe1f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.969683] ffff88800fe1f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.970556] >ffff88800fe1f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.971436] ^ [ 38.972025] ffff88800fe1f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.972909] ffff88800fe1f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.973744] ================================================================== [ 38.974702] Disabling lock debugging due to kernel taint [ 40.999948] BUG: Bad rss-counter state mm:0000000072fe9d15 type:MM_FILEPAGES val:33 [ 41.000965] BUG: Bad rss-counter state mm:0000000072fe9d15 type:MM_ANONPAGES val:22 [ 41.454397] BUG: Bad rss-counter state mm:0000000069ab92f8 type:MM_FILEPAGES val:33 [ 41.455997] BUG: Bad rss-counter state mm:0000000069ab92f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42701' (ECDSA) to the list of known hosts. 2023/06/20 17:04:27 fuzzer started 2023/06/20 17:04:27 dialing manager at localhost:36067 2023/06/20 17:04:27 checking machine... 2023/06/20 17:04:27 checking revisions... [ 42.189887] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:04:27 testing simple program... [ 42.231688] cgroup: Unknown subsys name 'net' [ 42.273811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002c9beee RSI=ffffffff81935bea RDI=ffff8880164df730 RBP=ffff8880164df788 RSP=ffff8880164df6c0 R8 =0000000000000001 R9 =ffff8880164df770 R10=0000000000038001 R11=000000000002c9f1 R12=ffff8880164df790 R13=ffff8880164df778 R14=ffff8880164df771 R15=ffff8880164df730 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007ffa93fff700 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=00007f46f5eba880 CR3=0000000015e04000 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=2037323a34303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3433 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3433325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000070bc7a71 RCX=ffff88806ca3d388 RDX=000000000000000c RSI=0000000000000003 RDI=00000000d8d143c3 RBP=ffff88800d4b1700 RSP=ffff8880147b7a70 R8 =000000004f184d50 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000800 R14=ffff8880147b7af8 R15=000000000000000c RIP=ffffffff822704d3 RFL=00000206 [-----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 00007fee7240d900 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=00007ffdfbc7f000 CR3=000000000fd3c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000