syzkaller login: [ 30.970560] BUG: Bad rss-counter state mm:00000000c1ccda54 type:MM_FILEPAGES val:33 [ 30.972240] BUG: Bad rss-counter state mm:00000000c1ccda54 type:MM_ANONPAGES val:22 [ 31.148198] ================================================================== [ 31.149193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.150346] Read of size 8 at addr ffff888015893a50 by task sshd/219 [ 31.151183] [ 31.151417] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.152357] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.153384] Call Trace: [ 31.153723] [ 31.154026] dump_stack_lvl+0x91/0xf0 [ 31.154546] print_report+0xcc/0x620 [ 31.155061] ? __virt_addr_valid+0x102/0x340 [ 31.155654] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156964] kasan_report+0xbe/0xf0 [ 31.157471] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.158132] vma_interval_tree_remove+0xc75/0xec0 [ 31.158792] vma_prepare+0xc54/0x11a0 [ 31.159318] __split_vma+0x5af/0x950 [ 31.159829] ? __pfx___split_vma+0x10/0x10 [ 31.160407] ? find_held_lock+0x2c/0x110 [ 31.160975] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.161596] ? lock_is_held_type+0x9f/0x120 [ 31.162187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.162852] ? mtree_range_walk+0x632/0x900 [ 31.163475] ? mas_walk+0x5c7/0x7c0 [ 31.163995] do_vmi_munmap+0x1f1/0x2b0 [ 31.164533] mmap_region+0x1f9/0x2660 [ 31.165065] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.165633] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.166409] ? __pfx_lock_acquire+0x10/0x10 [ 31.166993] ? __pfx_mmap_region+0x10/0x10 [ 31.167580] ? security_mmap_addr+0x7d/0xa0 [ 31.168162] ? get_unmapped_area+0x1f5/0x3f0 [ 31.168766] do_mmap+0x854/0xf00 [ 31.169242] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.169775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.170395] ksys_mmap_pgoff+0x3af/0x500 [ 31.170948] do_syscall_64+0x3f/0x90 [ 31.171492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172204] RIP: 0033:0x7fa3305d1d82 [ 31.172702] 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 [ 31.175051] RSP: 002b:00007ffe1efb3048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.176045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3305d1d82 [ 31.176982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa32fa0b000 [ 31.177921] RBP: 00007fa32fa0b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.178846] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636007b0ec0 [ 31.179802] R13: 00007ffe1efb3060 R14: 00007ffe1efb3090 R15: 00007ffe1efb33f0 [ 31.180765] [ 31.181091] [ 31.181326] Allocated by task 212: [ 31.181801] kasan_save_stack+0x22/0x50 [ 31.182360] kasan_set_track+0x25/0x30 [ 31.182908] __kasan_slab_alloc+0x59/0x70 [ 31.183489] kmem_cache_alloc+0x16b/0x370 [ 31.184058] vm_area_dup+0x20/0x160 [ 31.184561] __split_vma+0x170/0x950 [ 31.185071] split_vma+0xc6/0x110 [ 31.185552] mprotect_fixup+0x8d2/0xb30 [ 31.186105] do_mprotect_pkey+0x87e/0xd40 [ 31.186672] __x64_sys_mprotect+0x78/0xc0 [ 31.187267] do_syscall_64+0x3f/0x90 [ 31.187788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188497] [ 31.188732] Freed by task 212: [ 31.189162] kasan_save_stack+0x22/0x50 [ 31.189797] kasan_set_track+0x25/0x30 [ 31.190510] kasan_save_free_info+0x2b/0x50 [ 31.191287] __kasan_slab_free+0x10a/0x190 [ 31.192038] kmem_cache_free+0x10d/0x4d0 [ 31.192746] rcu_core+0x8c8/0x2860 [ 31.193373] __do_softirq+0x1b7/0x7d4 [ 31.194034] [ 31.194328] Last potentially related work creation: [ 31.195166] kasan_save_stack+0x22/0x50 [ 31.195866] __kasan_record_aux_stack+0x8e/0xa0 [ 31.196670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.197571] remove_vma+0x139/0x170 [ 31.198204] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.198981] do_vmi_munmap+0x1f1/0x2b0 [ 31.199665] __vm_munmap+0x138/0x3a0 [ 31.200331] __x64_sys_munmap+0x59/0x80 [ 31.201044] do_syscall_64+0x3f/0x90 [ 31.201721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.202643] [ 31.202949] The buggy address belongs to the object at ffff8880158939f8 [ 31.202949] which belongs to the cache vm_area_struct of size 168 [ 31.205066] The buggy address is located 88 bytes inside of [ 31.205066] freed 168-byte region [ffff8880158939f8, ffff888015893aa0) [ 31.207074] [ 31.207406] The buggy address belongs to the physical page: [ 31.208348] page:000000006214b418 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15893 [ 31.209901] memcg:ffff88800e68c401 [ 31.210504] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.211431] page_type: 0xffffffff() [ 31.212073] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.213384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e68c401 [ 31.214681] page dumped because: kasan: bad access detected [ 31.215543] [ 31.215781] Memory state around the buggy address: [ 31.216427] ffff888015893900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.217364] ffff888015893980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.218311] >ffff888015893a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.219259] ^ [ 31.220035] ffff888015893a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.220974] ffff888015893b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.221916] ================================================================== [ 31.223619] Disabling lock debugging due to kernel taint [ 33.953528] BUG: Bad rss-counter state mm:00000000ab6a35ec type:MM_FILEPAGES val:33 [ 33.954694] BUG: Bad rss-counter state mm:00000000ab6a35ec type:MM_ANONPAGES val:22 [ 34.362793] BUG: Bad rss-counter state mm:000000009ecfe552 type:MM_FILEPAGES val:33 [ 34.363851] BUG: Bad rss-counter state mm:000000009ecfe552 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51838' (ECDSA) to the list of known hosts. 2023/06/21 06:31:30 fuzzer started 2023/06/21 06:31:30 dialing manager at localhost:36067 2023/06/21 06:31:30 checking machine... 2023/06/21 06:31:30 checking revisions... [ 35.051278] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:31:30 testing simple program... [ 35.100837] cgroup: Unknown subsys name 'net' [ 35.154778] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:31:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016584000 RCX=1ffffffff09a6744 RDX=ffffffff87f962e0 RSI=ffffffff84d331e0 RDI=ffffffff84d33a20 RBP=0000000000000010 RSP=ffff888016ba7d10 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888016584010 R13=0000000000000000 R14=ffffffff87f97640 R15=0000000000000001 RIP=ffffffff83648b13 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 00007f632795d900 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=00007f6327f150b0 CR3=000000001469c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff888008e07db0 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801a27e8a0 RIP=ffffffff8113038e 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 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=00007f52633299b0 CR3=000000000c6d4000 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=2030333a31333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a31333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000