syzkaller login: [ 35.317386] BUG: Bad rss-counter state mm:00000000e8bbcb03 type:MM_FILEPAGES val:33 [ 35.318801] BUG: Bad rss-counter state mm:00000000e8bbcb03 type:MM_ANONPAGES val:22 [ 35.365638] ================================================================== [ 35.366811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.368183] Read of size 8 at addr ffff8880097bd3f8 by task sshd/220 [ 35.369224] [ 35.369515] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.370667] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.372002] Call Trace: [ 35.372431] [ 35.372809] dump_stack_lvl+0x91/0xf0 [ 35.373463] print_report+0xcc/0x620 [ 35.374107] ? __virt_addr_valid+0x102/0x340 [ 35.374849] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.375692] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.376525] kasan_report+0xbe/0xf0 [ 35.377172] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.378008] vma_interval_tree_remove+0xc75/0xec0 [ 35.378814] vma_prepare+0xc54/0x11a0 [ 35.379463] __split_vma+0x5af/0x950 [ 35.380119] ? __pfx___split_vma+0x10/0x10 [ 35.380834] ? find_held_lock+0x2c/0x110 [ 35.381528] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.382288] ? lock_is_held_type+0x9f/0x120 [ 35.383015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.383826] ? mtree_range_walk+0x632/0x900 [ 35.384388] ? mas_walk+0x5c7/0x7c0 [ 35.384874] do_vmi_munmap+0x1f1/0x2b0 [ 35.385373] mmap_region+0x1f9/0x2660 [ 35.385860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.386385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.387103] ? __pfx_lock_acquire+0x10/0x10 [ 35.387637] ? __pfx_mmap_region+0x10/0x10 [ 35.388197] ? security_mmap_addr+0x7d/0xa0 [ 35.388731] ? get_unmapped_area+0x1f5/0x3f0 [ 35.389292] do_mmap+0x854/0xf00 [ 35.389735] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.390247] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.390808] ksys_mmap_pgoff+0x3af/0x500 [ 35.391325] do_syscall_64+0x3f/0x90 [ 35.391814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.392470] RIP: 0033:0x7fe15bf4bd82 [ 35.392947] 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 [ 35.395156] RSP: 002b:00007ffc434e21d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.396123] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe15bf4bd82 [ 35.396993] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe15b385000 [ 35.397861] RBP: 00007fe15b385000 R08: 0000000000000009 R09: 0000000000001000 [ 35.398748] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576baf7fd90 [ 35.399632] R13: 00007ffc434e21f0 R14: 00007ffc434e2220 R15: 00007ffc434e2580 [ 35.400540] [ 35.400847] [ 35.401079] Allocated by task 213: [ 35.401537] kasan_save_stack+0x22/0x50 [ 35.402081] kasan_set_track+0x25/0x30 [ 35.402604] __kasan_slab_alloc+0x59/0x70 [ 35.403162] kmem_cache_alloc+0x16b/0x370 [ 35.403712] vm_area_dup+0x20/0x160 [ 35.404193] __split_vma+0x170/0x950 [ 35.404677] split_vma+0xc6/0x110 [ 35.405148] mprotect_fixup+0x8d2/0xb30 [ 35.405690] do_mprotect_pkey+0x87e/0xd40 [ 35.406245] __x64_sys_mprotect+0x78/0xc0 [ 35.406800] do_syscall_64+0x3f/0x90 [ 35.407296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.408000] [ 35.408228] Freed by task 213: [ 35.408646] kasan_save_stack+0x22/0x50 [ 35.409191] kasan_set_track+0x25/0x30 [ 35.409712] kasan_save_free_info+0x2b/0x50 [ 35.410275] __kasan_slab_free+0x10a/0x190 [ 35.410846] kmem_cache_free+0x10d/0x4d0 [ 35.411391] rcu_core+0x8c8/0x2860 [ 35.411871] __do_softirq+0x1b7/0x7d4 [ 35.412374] [ 35.412601] Last potentially related work creation: [ 35.413220] kasan_save_stack+0x22/0x50 [ 35.413748] __kasan_record_aux_stack+0x8e/0xa0 [ 35.414357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.415038] remove_vma+0x139/0x170 [ 35.415524] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.416124] do_vmi_munmap+0x1f1/0x2b0 [ 35.416642] __vm_munmap+0x138/0x3a0 [ 35.417143] __x64_sys_munmap+0x59/0x80 [ 35.417672] do_syscall_64+0x3f/0x90 [ 35.418174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.418857] [ 35.419090] The buggy address belongs to the object at ffff8880097bd3a0 [ 35.419090] which belongs to the cache vm_area_struct of size 168 [ 35.420692] The buggy address is located 88 bytes inside of [ 35.420692] freed 168-byte region [ffff8880097bd3a0, ffff8880097bd448) [ 35.422195] [ 35.422423] The buggy address belongs to the physical page: [ 35.423127] page:00000000a36c52cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97bd [ 35.424293] memcg:ffff88800d174001 [ 35.424749] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.425477] page_type: 0xffffffff() [ 35.425955] raw: 0100000000000200 ffff88800879fc80 ffffea000032a900 dead000000000005 [ 35.426944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d174001 [ 35.427927] page dumped because: kasan: bad access detected [ 35.428632] [ 35.428858] Memory state around the buggy address: [ 35.429477] ffff8880097bd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.430389] ffff8880097bd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.431301] >ffff8880097bd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.432216] ^ [ 35.433118] ffff8880097bd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.434032] ffff8880097bd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.434941] ================================================================== [ 35.436290] Disabling lock debugging due to kernel taint [ 37.381349] BUG: Bad rss-counter state mm:0000000056464c0f type:MM_FILEPAGES val:33 [ 37.382444] BUG: Bad rss-counter state mm:0000000056464c0f type:MM_ANONPAGES val:22 [ 37.924313] BUG: Bad rss-counter state mm:000000000707a1cb type:MM_FILEPAGES val:33 [ 37.925427] BUG: Bad rss-counter state mm:000000000707a1cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27758' (ECDSA) to the list of known hosts. 2023/06/19 19:55:31 fuzzer started 2023/06/19 19:55:31 dialing manager at localhost:44161 2023/06/19 19:55:31 checking machine... 2023/06/19 19:55:31 checking revisions... [ 38.590112] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:55:31 testing simple program... [ 38.641484] cgroup: Unknown subsys name 'net' [ 38.689347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:55:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff846000aa RCX=0000000000000001 RDX=1ffff11003035f0d RSI=ffff8880181aff48 RDI=ffffffff846000aa RBP=ffffffff846000aa RSP=ffff8880181af7b8 R8 =0000000000000001 R9 =ffff8880181af850 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880181af8d8 R13=0000000000000000 R14=ffff888019e3b680 R15=ffff88800d58d130 RIP=ffffffff811fc6f7 RFL=00000282 [--S----] 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 00007f21a40c4900 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=00007f21a467b618 CR3=000000000db8e000 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=2030333a35353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a35353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fed85ff77b0 CR3=000000000d514000 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=71de2ee8aae759894b4ddb080f500a48 XMM02=ec2efd57dc4c00df000000000011d180 XMM03=e9f81dff8992cced000000000011d250 XMM04=01250e7a82937b3100000000000ae988 XMM05=19e9129bd510f2350000000000134618 XMM06=3c3355353046c2b50000000000133480 XMM07=e042d86d42eb936e0000000000124ce0 XMM08=e9f81dff8992cced000000000011d250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000