syzkaller login: [ 35.787716] BUG: Bad rss-counter state mm:000000006a6986e8 type:MM_FILEPAGES val:33 [ 35.788918] BUG: Bad rss-counter state mm:000000006a6986e8 type:MM_ANONPAGES val:22 [ 35.827689] ================================================================== [ 35.828756] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.829809] Read of size 8 at addr ffff88800c5d0058 by task sshd/220 [ 35.830586] [ 35.830807] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.831895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.833047] Call Trace: [ 35.833367] [ 35.833656] dump_stack_lvl+0x91/0xf0 [ 35.834146] print_report+0xcc/0x620 [ 35.834644] ? __virt_addr_valid+0x102/0x340 [ 35.835199] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.835816] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.836439] kasan_report+0xbe/0xf0 [ 35.836921] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.837546] vma_interval_tree_remove+0xc75/0xec0 [ 35.838148] vma_prepare+0xc54/0x11a0 [ 35.838632] __split_vma+0x5af/0x950 [ 35.839101] ? __pfx___split_vma+0x10/0x10 [ 35.839632] ? find_held_lock+0x2c/0x110 [ 35.840162] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.840728] ? lock_is_held_type+0x9f/0x120 [ 35.841278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.841893] ? mtree_range_walk+0x632/0x900 [ 35.842450] ? mas_walk+0x5c7/0x7c0 [ 35.842930] do_vmi_munmap+0x1f1/0x2b0 [ 35.843428] mmap_region+0x1f9/0x2660 [ 35.843918] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.844427] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.845162] ? __pfx_lock_acquire+0x10/0x10 [ 35.845701] ? __pfx_mmap_region+0x10/0x10 [ 35.846230] ? security_mmap_addr+0x7d/0xa0 [ 35.846772] ? get_unmapped_area+0x1f5/0x3f0 [ 35.847322] do_mmap+0x854/0xf00 [ 35.847760] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.848253] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.848811] ksys_mmap_pgoff+0x3af/0x500 [ 35.849349] do_syscall_64+0x3f/0x90 [ 35.849834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.850487] RIP: 0033:0x7ff3c320bd82 [ 35.850958] 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 [ 35.853128] RSP: 002b:00007fff9c7f7768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.854048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3c320bd82 [ 35.854898] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3c2645000 [ 35.855750] RBP: 00007ff3c2645000 R08: 0000000000000009 R09: 0000000000001000 [ 35.856596] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec61277ec0 [ 35.857452] R13: 00007fff9c7f7780 R14: 00007fff9c7f77b0 R15: 00007fff9c7f7b10 [ 35.858310] [ 35.858603] [ 35.858820] Allocated by task 213: [ 35.859252] kasan_save_stack+0x22/0x50 [ 35.859761] kasan_set_track+0x25/0x30 [ 35.860251] __kasan_slab_alloc+0x59/0x70 [ 35.860783] kmem_cache_alloc+0x16b/0x370 [ 35.861313] vm_area_dup+0x20/0x160 [ 35.861780] __split_vma+0x170/0x950 [ 35.862248] split_vma+0xc6/0x110 [ 35.862698] mprotect_fixup+0x8d2/0xb30 [ 35.863203] do_mprotect_pkey+0x87e/0xd40 [ 35.863722] __x64_sys_mprotect+0x78/0xc0 [ 35.864247] do_syscall_64+0x3f/0x90 [ 35.864723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.865376] [ 35.865592] Freed by task 13: [ 35.865975] kasan_save_stack+0x22/0x50 [ 35.866475] kasan_set_track+0x25/0x30 [ 35.866969] kasan_save_free_info+0x2b/0x50 [ 35.867499] __kasan_slab_free+0x10a/0x190 [ 35.868029] kmem_cache_free+0x10d/0x4d0 [ 35.868534] rcu_core+0x8c8/0x2860 [ 35.868993] __do_softirq+0x1b7/0x7d4 [ 35.869474] [ 35.869690] Last potentially related work creation: [ 35.870296] kasan_save_stack+0x22/0x50 [ 35.870801] __kasan_record_aux_stack+0x8e/0xa0 [ 35.871377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.872026] remove_vma+0x139/0x170 [ 35.872482] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.873104] do_vmi_munmap+0x1f1/0x2b0 [ 35.873604] __vm_munmap+0x138/0x3a0 [ 35.874082] __x64_sys_munmap+0x59/0x80 [ 35.874586] do_syscall_64+0x3f/0x90 [ 35.875070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.875714] [ 35.875930] The buggy address belongs to the object at ffff88800c5d0000 [ 35.875930] which belongs to the cache vm_area_struct of size 168 [ 35.877435] The buggy address is located 88 bytes inside of [ 35.877435] freed 168-byte region [ffff88800c5d0000, ffff88800c5d00a8) [ 35.878893] [ 35.879107] The buggy address belongs to the physical page: [ 35.879770] page:000000008c651ca0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5d0 [ 35.880859] memcg:ffff88800e4b6101 [ 35.881292] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.881935] page_type: 0xffffffff() [ 35.882383] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.883296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4b6101 [ 35.884201] page dumped because: kasan: bad access detected [ 35.884872] [ 35.885093] Memory state around the buggy address: [ 35.885680] ffff88800c5cff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.886543] ffff88800c5cff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.887405] >ffff88800c5d0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.888252] ^ [ 35.889007] ffff88800c5d0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.889876] ffff88800c5d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.890727] ================================================================== [ 35.891629] Disabling lock debugging due to kernel taint [ 38.413930] BUG: Bad rss-counter state mm:000000005c7f8f50 type:MM_FILEPAGES val:33 [ 38.415088] BUG: Bad rss-counter state mm:000000005c7f8f50 type:MM_ANONPAGES val:22 [ 38.899650] BUG: Bad rss-counter state mm:00000000ed848a04 type:MM_FILEPAGES val:33 [ 38.900804] BUG: Bad rss-counter state mm:00000000ed848a04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29112' (ECDSA) to the list of known hosts. 2023/06/19 19:03:25 fuzzer started 2023/06/19 19:03:25 dialing manager at localhost:44161 2023/06/19 19:03:26 checking machine... 2023/06/19 19:03:26 checking revisions... [ 39.568270] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:03:26 testing simple program... [ 39.621366] cgroup: Unknown subsys name 'net' [ 39.670272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:03:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8450d7d7 RCX=ffffffff864b1901 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8450d7d7 RBP=ffffffff8450d7d7 RSP=ffff88806ce09a40 R8 =ffffffff864b19c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800cab8080 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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 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=00007ffd161a6248 CR3=000000000e80e000 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=2035323a33303a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fdc7828 RCX=0000000000000001 RDX=1ffff11001fb8f06 RSI=ffff88800fdc7cb0 RDI=ffff88800fdc7830 RBP=ffff88800fdc7cb0 RSP=ffff88800fdc7780 R8 =ffffffff86136d8c R9 =ffff88800fdc7868 R10=0000000000038001 R11=0000000000020c48 R12=0000000000000008 R13=ffff88800fdc7870 R14=ffff88800fdc7cb8 R15=ffff88800fdc7828 RIP=ffffffff81130445 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 00007fcff8f6f900 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=00007fcff9524650 CR3=0000000016b42000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000