syzkaller login: [ 40.028558] BUG: Bad rss-counter state mm:00000000af66fcb3 type:MM_FILEPAGES val:33 [ 40.029199] BUG: Bad rss-counter state mm:00000000af66fcb3 type:MM_ANONPAGES val:22 [ 40.214488] ================================================================== [ 40.214975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.215497] Read of size 8 at addr ffff88801a771a50 by task sshd/220 [ 40.215905] [ 40.216046] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.216587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.217164] Call Trace: [ 40.217353] [ 40.217521] dump_stack_lvl+0x91/0xf0 [ 40.217809] print_report+0xcc/0x620 [ 40.218093] ? __virt_addr_valid+0x102/0x340 [ 40.218414] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.218780] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.219137] kasan_report+0xbe/0xf0 [ 40.219422] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.219789] vma_interval_tree_remove+0xc75/0xec0 [ 40.220173] vma_prepare+0xc54/0x11a0 [ 40.220488] __split_vma+0x5af/0x950 [ 40.220780] ? __pfx___split_vma+0x10/0x10 [ 40.221120] ? find_held_lock+0x2c/0x110 [ 40.221466] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.221822] ? lock_is_held_type+0x9f/0x120 [ 40.222150] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.222568] ? mtree_range_walk+0x632/0x900 [ 40.222914] ? mas_walk+0x5c7/0x7c0 [ 40.223198] do_vmi_munmap+0x1f1/0x2b0 [ 40.223516] mmap_region+0x1f9/0x2660 [ 40.223803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.224230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.225028] ? __pfx_lock_acquire+0x10/0x10 [ 40.225352] ? __pfx_mmap_region+0x10/0x10 [ 40.225708] ? security_mmap_addr+0x7d/0xa0 [ 40.226024] ? get_unmapped_area+0x1f5/0x3f0 [ 40.226413] do_mmap+0x854/0xf00 [ 40.226687] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.226996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.227327] ksys_mmap_pgoff+0x3af/0x500 [ 40.227687] do_syscall_64+0x3f/0x90 [ 40.227971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.228417] RIP: 0033:0x7f4d234c9d82 [ 40.228689] 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 [ 40.229908] RSP: 002b:00007ffd93be72d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.230458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d234c9d82 [ 40.230982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d22903000 [ 40.231524] RBP: 00007f4d22903000 R08: 0000000000000009 R09: 0000000000001000 [ 40.231965] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1dfe00f70 [ 40.232450] R13: 00007ffd93be72f0 R14: 00007ffd93be7320 R15: 00007ffd93be7680 [ 40.233015] [ 40.233197] [ 40.233330] Allocated by task 213: [ 40.233597] kasan_save_stack+0x22/0x50 [ 40.233865] kasan_set_track+0x25/0x30 [ 40.234111] __kasan_slab_alloc+0x59/0x70 [ 40.234390] kmem_cache_alloc+0x16b/0x370 [ 40.234663] vm_area_dup+0x20/0x160 [ 40.234907] __split_vma+0x170/0x950 [ 40.235154] split_vma+0xc6/0x110 [ 40.235391] mprotect_fixup+0x8d2/0xb30 [ 40.235712] do_mprotect_pkey+0x87e/0xd40 [ 40.235973] __x64_sys_mprotect+0x78/0xc0 [ 40.236290] do_syscall_64+0x3f/0x90 [ 40.236567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.236943] [ 40.237084] Freed by task 19: [ 40.237312] kasan_save_stack+0x22/0x50 [ 40.237589] kasan_set_track+0x25/0x30 [ 40.237915] kasan_save_free_info+0x2b/0x50 [ 40.238226] __kasan_slab_free+0x10a/0x190 [ 40.238525] kmem_cache_free+0x10d/0x4d0 [ 40.238858] rcu_core+0x8c8/0x2860 [ 40.239081] __do_softirq+0x1b7/0x7d4 [ 40.239387] [ 40.239565] Last potentially related work creation: [ 40.239893] kasan_save_stack+0x22/0x50 [ 40.240225] __kasan_record_aux_stack+0x8e/0xa0 [ 40.240622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.241005] remove_vma+0x139/0x170 [ 40.241260] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.241552] do_vmi_munmap+0x1f1/0x2b0 [ 40.241846] __vm_munmap+0x138/0x3a0 [ 40.242136] __x64_sys_munmap+0x59/0x80 [ 40.242481] do_syscall_64+0x3f/0x90 [ 40.242769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.243147] [ 40.243291] The buggy address belongs to the object at ffff88801a7719f8 [ 40.243291] which belongs to the cache vm_area_struct of size 168 [ 40.244183] The buggy address is located 88 bytes inside of [ 40.244183] freed 168-byte region [ffff88801a7719f8, ffff88801a771aa0) [ 40.245039] [ 40.245168] The buggy address belongs to the physical page: [ 40.245551] page:00000000b4218b40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a771 [ 40.246196] memcg:ffff888015c56601 [ 40.246410] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.246779] page_type: 0xffffffff() [ 40.247064] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.247698] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c56601 [ 40.248266] page dumped because: kasan: bad access detected [ 40.248686] [ 40.248832] Memory state around the buggy address: [ 40.249123] ffff88801a771900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.249716] ffff88801a771980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 40.250188] >ffff88801a771a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.250723] ^ [ 40.251067] ffff88801a771a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.251570] ffff88801a771b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.252057] ================================================================== [ 40.252634] Disabling lock debugging due to kernel taint [ 44.088417] BUG: Bad rss-counter state mm:000000005f503f0d type:MM_FILEPAGES val:33 [ 44.089040] BUG: Bad rss-counter state mm:000000005f503f0d type:MM_ANONPAGES val:22 [ 45.852197] BUG: Bad rss-counter state mm:00000000c49b01c6 type:MM_FILEPAGES val:33 [ 45.852813] BUG: Bad rss-counter state mm:00000000c49b01c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43042' (ECDSA) to the list of known hosts. 2023/06/20 09:57:42 fuzzer started 2023/06/20 09:57:43 dialing manager at localhost:44161 2023/06/20 09:57:43 checking machine... 2023/06/20 09:57:43 checking revisions... [ 46.627806] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:57:43 testing simple program... [ 46.664736] cgroup: Unknown subsys name 'net' [ 46.711105] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:57:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f49127ac328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11001ad1fa4 RCX=0000000000000000 RDX=ffff88800b9151c0 RSI=ffffffff81effabc RDI=ffff888009867900 RBP=ffff888009867900 RSP=ffff88800d68fd18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000802 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c07e0 RFL=00000286 [--S--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=00007fc78a7f9028 CR3=000000001a532000 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=756e696c2d34365f3638782f62696c2f XMM01=00362e6f732e6362696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000