syzkaller login: [ 23.781774] BUG: Bad rss-counter state mm:000000002f6544ef type:MM_FILEPAGES val:33 [ 23.783079] BUG: Bad rss-counter state mm:000000002f6544ef type:MM_ANONPAGES val:22 [ 23.829869] ================================================================== [ 23.830997] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.832076] Read of size 8 at addr ffff88800c55f5c8 by task sshd/220 [ 23.832959] [ 23.833203] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.834204] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.835331] Call Trace: [ 23.835706] [ 23.836024] dump_stack_lvl+0x91/0xf0 [ 23.836588] print_report+0xcc/0x620 [ 23.837254] ? __virt_addr_valid+0x102/0x340 [ 23.838052] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.838929] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.839668] kasan_report+0xbe/0xf0 [ 23.840229] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.841003] vma_interval_tree_remove+0xc75/0xec0 [ 23.841730] vma_prepare+0xc54/0x11a0 [ 23.842356] __split_vma+0x5af/0x950 [ 23.842920] ? __pfx___split_vma+0x10/0x10 [ 23.843550] ? find_held_lock+0x2c/0x110 [ 23.844162] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.844816] ? lock_is_held_type+0x9f/0x120 [ 23.845461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.846223] ? mtree_range_walk+0x632/0x900 [ 23.846883] ? mas_walk+0x5c7/0x7c0 [ 23.847453] do_vmi_munmap+0x1f1/0x2b0 [ 23.848055] mmap_region+0x1f9/0x2660 [ 23.848634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.849240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.850114] ? __pfx_lock_acquire+0x10/0x10 [ 23.850757] ? __pfx_mmap_region+0x10/0x10 [ 23.851385] ? security_mmap_addr+0x7d/0xa0 [ 23.852054] ? get_unmapped_area+0x1f5/0x3f0 [ 23.852720] do_mmap+0x854/0xf00 [ 23.853241] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.853851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.854531] ksys_mmap_pgoff+0x3af/0x500 [ 23.855134] do_syscall_64+0x3f/0x90 [ 23.855710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.856502] RIP: 0033:0x7fee156c7d82 [ 23.857051] 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 [ 23.859586] RSP: 002b:00007ffe40f9c238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.860672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee156c7d82 [ 23.861678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee14b01000 [ 23.862690] RBP: 00007fee14b01000 R08: 0000000000000009 R09: 0000000000001000 [ 23.863685] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618e83c1f60 [ 23.864711] R13: 00007ffe40f9c250 R14: 00007ffe40f9c280 R15: 00007ffe40f9c5e0 [ 23.865721] [ 23.866081] [ 23.866333] Allocated by task 213: [ 23.866855] kasan_save_stack+0x22/0x50 [ 23.867448] kasan_set_track+0x25/0x30 [ 23.868014] __kasan_slab_alloc+0x59/0x70 [ 23.868636] kmem_cache_alloc+0x16b/0x370 [ 23.869245] vm_area_dup+0x20/0x160 [ 23.869786] __split_vma+0x170/0x950 [ 23.870332] split_vma+0xc6/0x110 [ 23.870833] mprotect_fixup+0x8d2/0xb30 [ 23.871417] do_mprotect_pkey+0x87e/0xd40 [ 23.872022] __x64_sys_mprotect+0x78/0xc0 [ 23.872634] do_syscall_64+0x3f/0x90 [ 23.873178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.873939] [ 23.874190] Freed by task 213: [ 23.874655] kasan_save_stack+0x22/0x50 [ 23.875252] kasan_set_track+0x25/0x30 [ 23.875828] kasan_save_free_info+0x2b/0x50 [ 23.876457] __kasan_slab_free+0x10a/0x190 [ 23.877073] kmem_cache_free+0x10d/0x4d0 [ 23.877681] rcu_core+0x8c8/0x2860 [ 23.878228] __do_softirq+0x1b7/0x7d4 [ 23.878796] [ 23.879051] Last potentially related work creation: [ 23.879724] kasan_save_stack+0x22/0x50 [ 23.880311] __kasan_record_aux_stack+0x8e/0xa0 [ 23.880978] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.881728] remove_vma+0x139/0x170 [ 23.882272] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.882927] do_vmi_munmap+0x1f1/0x2b0 [ 23.883487] __vm_munmap+0x138/0x3a0 [ 23.884030] __x64_sys_munmap+0x59/0x80 [ 23.884601] do_syscall_64+0x3f/0x90 [ 23.885148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.885904] [ 23.886156] Second to last potentially related work creation: [ 23.886968] kasan_save_stack+0x22/0x50 [ 23.887566] __kasan_record_aux_stack+0x8e/0xa0 [ 23.888249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.889008] remove_vma+0x139/0x170 [ 23.889547] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.890221] do_vmi_munmap+0x1f1/0x2b0 [ 23.890788] mmap_region+0x1f9/0x2660 [ 23.891340] do_mmap+0x854/0xf00 [ 23.891838] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.892400] ksys_mmap_pgoff+0x3af/0x500 [ 23.892987] do_syscall_64+0x3f/0x90 [ 23.893540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.894289] [ 23.894541] The buggy address belongs to the object at ffff88800c55f570 [ 23.894541] which belongs to the cache vm_area_struct of size 168 [ 23.896271] The buggy address is located 88 bytes inside of [ 23.896271] freed 168-byte region [ffff88800c55f570, ffff88800c55f618) [ 23.897944] [ 23.898199] The buggy address belongs to the physical page: [ 23.898976] page:000000008b23172f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc55f [ 23.900235] memcg:ffff88800efa0a01 [ 23.900730] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.901528] page_type: 0xffffffff() [ 23.902054] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a4540 0000000000000007 [ 23.903121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efa0a01 [ 23.904178] page dumped because: kasan: bad access detected [ 23.904945] [ 23.905184] Memory state around the buggy address: [ 23.905857] ffff88800c55f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.906795] ffff88800c55f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 23.907715] >ffff88800c55f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.908630] ^ [ 23.909352] ffff88800c55f600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 23.910323] ffff88800c55f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.911262] ================================================================== [ 23.912900] Disabling lock debugging due to kernel taint [ 26.012620] BUG: Bad rss-counter state mm:000000006d5a52a3 type:MM_FILEPAGES val:33 [ 26.014428] BUG: Bad rss-counter state mm:000000006d5a52a3 type:MM_ANONPAGES val:22 [ 26.541011] BUG: Bad rss-counter state mm:00000000afef936b type:MM_FILEPAGES val:33 [ 26.542203] BUG: Bad rss-counter state mm:00000000afef936b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29121' (ECDSA) to the list of known hosts. 2023/06/21 09:40:40 fuzzer started 2023/06/21 09:40:40 dialing manager at localhost:36067 2023/06/21 09:40:40 checking machine... 2023/06/21 09:40:40 checking revisions... [ 27.165807] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:40:40 testing simple program... [ 27.214618] cgroup: Unknown subsys name 'net' [ 27.291384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:40 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88801591b680 RSI=ffffffff818a2807 RDI=0000000000000005 RBP=ffff8880185f7b20 RSP=ffff8880185f7950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000001 R12=ffff88800c142178 R13=0000000000000002 R14=ffff8880185f7b70 R15=ffff88800f042225 RIP=ffffffff814c0880 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 00007f9eea9e9900 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=00007f9eeaf9e650 CR3=00000000097c2000 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=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 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=00007fffd58ccf88 CR3=0000000015858000 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=2030343a30343a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000