syzkaller login: [ 31.175751] BUG: Bad rss-counter state mm:00000000efa0746b type:MM_FILEPAGES val:33 [ 31.176954] BUG: Bad rss-counter state mm:00000000efa0746b type:MM_ANONPAGES val:22 [ 31.324971] ================================================================== [ 31.325881] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.326824] Read of size 8 at addr ffff88800c69f4e0 by task sshd/220 [ 31.327593] [ 31.327908] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.328794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.329771] Call Trace: [ 31.330099] [ 31.330389] dump_stack_lvl+0x91/0xf0 [ 31.330891] print_report+0xcc/0x620 [ 31.331376] ? __virt_addr_valid+0x102/0x340 [ 31.331944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.332576] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.333201] kasan_report+0xbe/0xf0 [ 31.333673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.334319] vma_interval_tree_remove+0xc75/0xec0 [ 31.334919] vma_prepare+0xc54/0x11a0 [ 31.335402] __split_vma+0x5af/0x950 [ 31.335874] ? __pfx___split_vma+0x10/0x10 [ 31.336419] ? find_held_lock+0x2c/0x110 [ 31.336939] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.337507] ? lock_is_held_type+0x9f/0x120 [ 31.338050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.338655] ? mtree_range_walk+0x632/0x900 [ 31.339210] ? mas_walk+0x5c7/0x7c0 [ 31.339687] do_vmi_munmap+0x1f1/0x2b0 [ 31.340184] mmap_region+0x1f9/0x2660 [ 31.340665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.341176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.341885] ? __pfx_lock_acquire+0x10/0x10 [ 31.342417] ? __pfx_mmap_region+0x10/0x10 [ 31.342946] ? security_mmap_addr+0x7d/0xa0 [ 31.343472] ? get_unmapped_area+0x1f5/0x3f0 [ 31.344017] do_mmap+0x854/0xf00 [ 31.344484] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.344977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.345544] ksys_mmap_pgoff+0x3af/0x500 [ 31.346059] do_syscall_64+0x3f/0x90 [ 31.346543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.347194] RIP: 0033:0x7f85db18ad82 [ 31.347657] 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 [ 31.349802] RSP: 002b:00007ffe980284c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.350718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85db18ad82 [ 31.351569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85da5c4000 [ 31.352423] RBP: 00007f85da5c4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.353275] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f02887ff70 [ 31.354129] R13: 00007ffe980284e0 R14: 00007ffe98028510 R15: 00007ffe98028870 [ 31.354988] [ 31.355283] [ 31.355499] Allocated by task 213: [ 31.355938] kasan_save_stack+0x22/0x50 [ 31.356466] kasan_set_track+0x25/0x30 [ 31.356971] __kasan_slab_alloc+0x59/0x70 [ 31.357499] kmem_cache_alloc+0x16b/0x370 [ 31.358026] vm_area_dup+0x20/0x160 [ 31.358484] __split_vma+0x170/0x950 [ 31.358953] split_vma+0xc6/0x110 [ 31.359394] mprotect_fixup+0x8d2/0xb30 [ 31.359899] do_mprotect_pkey+0x87e/0xd40 [ 31.360433] __x64_sys_mprotect+0x78/0xc0 [ 31.360956] do_syscall_64+0x3f/0x90 [ 31.361435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.362075] [ 31.362293] Freed by task 13: [ 31.362674] kasan_save_stack+0x22/0x50 [ 31.363181] kasan_set_track+0x25/0x30 [ 31.363683] kasan_save_free_info+0x2b/0x50 [ 31.364235] __kasan_slab_free+0x10a/0x190 [ 31.364782] kmem_cache_free+0x10d/0x4d0 [ 31.365293] rcu_core+0x8c8/0x2860 [ 31.365729] __do_softirq+0x1b7/0x7d4 [ 31.366212] [ 31.366424] Last potentially related work creation: [ 31.367003] kasan_save_stack+0x22/0x50 [ 31.367515] __kasan_record_aux_stack+0x8e/0xa0 [ 31.368082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.368724] remove_vma+0x139/0x170 [ 31.369212] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.369772] do_vmi_munmap+0x1f1/0x2b0 [ 31.370258] __vm_munmap+0x138/0x3a0 [ 31.370726] __x64_sys_munmap+0x59/0x80 [ 31.371219] do_syscall_64+0x3f/0x90 [ 31.371696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.372358] [ 31.372573] The buggy address belongs to the object at ffff88800c69f488 [ 31.372573] which belongs to the cache vm_area_struct of size 168 [ 31.374031] The buggy address is located 88 bytes inside of [ 31.374031] freed 168-byte region [ffff88800c69f488, ffff88800c69f530) [ 31.375441] [ 31.375658] The buggy address belongs to the physical page: [ 31.376331] page:00000000c4cc38d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc69f [ 31.377422] memcg:ffff88800d7a3001 [ 31.377859] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.378511] page_type: 0xffffffff() [ 31.378972] raw: 0100000000000200 ffff8880087a0c80 ffffea000038e900 dead000000000002 [ 31.379886] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7a3001 [ 31.380801] page dumped because: kasan: bad access detected [ 31.381462] [ 31.381679] Memory state around the buggy address: [ 31.382260] ffff88800c69f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.383118] ffff88800c69f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.383975] >ffff88800c69f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.384836] ^ [ 31.385590] ffff88800c69f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.386450] ffff88800c69f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.387309] ================================================================== [ 31.388394] Disabling lock debugging due to kernel taint [ 33.922794] BUG: Bad rss-counter state mm:00000000b13ceec5 type:MM_FILEPAGES val:33 [ 33.924322] BUG: Bad rss-counter state mm:00000000b13ceec5 type:MM_ANONPAGES val:22 [ 34.396852] BUG: Bad rss-counter state mm:000000001d95bf55 type:MM_FILEPAGES val:33 [ 34.397854] BUG: Bad rss-counter state mm:000000001d95bf55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61548' (ECDSA) to the list of known hosts. 2023/06/21 04:22:45 fuzzer started 2023/06/21 04:22:46 dialing manager at localhost:36067 2023/06/21 04:22:46 checking machine... 2023/06/21 04:22:46 checking revisions... [ 35.149326] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:22:46 testing simple program... [ 35.205560] cgroup: Unknown subsys name 'net' [ 35.244835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:22:45 Registers: info registers vcpu 0 RAX=0000000000000024 RBX=0000000000000000 RCX=0000000000000000 RDX=0000561875ffde00 RSI=0000561875ffde30 RDI=0000000000000000 RBP=0000561875ffde30 RSP=00007fce9b78eaf0 R8 =00007fce9b78f700 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000286 R12=00007fce940070b0 R13=0000561875ffde00 R14=0000561875ffd8d8 R15=00007fce9b78eaf0 RIP=0000561874ee4b63 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fce9b78f700 00000000 00000000 GS =0000 0000000000000000 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=00007f33f00faa90 CR3=0000000016daa000 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=2035343a32323a3430203132206e754a XMM01=5f687373203a726f727265203a5d3733 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a32323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff844c7cec RBX=ffffffff8604a88c RCX=ffffffff844c7d8d RDX=0000000000000000 RSI=ffffffff864abb34 RDI=ffffffff8604a88c RBP=ffffffff8604a890 RSP=ffff88800fd4ef30 R8 =ffffffff864abb34 R9 =ffff88800fd4f028 R10=0000000000038001 R11=00000000000b3fb2 R12=ffffffff8604a88c R13=ffffffff8604a88c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f291a040900 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=00007f291a00a008 CR3=0000000016bf4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000