syzkaller login: [ 30.979733] BUG: Bad rss-counter state mm:000000005c3ed4e3 type:MM_FILEPAGES val:33 [ 30.980587] BUG: Bad rss-counter state mm:000000005c3ed4e3 type:MM_ANONPAGES val:22 [ 31.099621] ================================================================== [ 31.100295] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.100908] Read of size 8 at addr ffff888019c47798 by task sshd/222 [ 31.101454] [ 31.101595] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.102208] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.102905] Call Trace: [ 31.103116] [ 31.103292] dump_stack_lvl+0x91/0xf0 [ 31.103611] print_report+0xcc/0x620 [ 31.104178] ? __virt_addr_valid+0x102/0x340 [ 31.104628] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105064] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105531] kasan_report+0xbe/0xf0 [ 31.105870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106348] vma_interval_tree_remove+0xc75/0xec0 [ 31.106753] vma_prepare+0xc54/0x11a0 [ 31.107086] __split_vma+0x5af/0x950 [ 31.107412] ? __pfx___split_vma+0x10/0x10 [ 31.107764] ? find_held_lock+0x2c/0x110 [ 31.108118] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.108499] ? lock_is_held_type+0x9f/0x120 [ 31.108873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.109380] ? mtree_range_walk+0x632/0x900 [ 31.109749] ? mas_walk+0x5c7/0x7c0 [ 31.110105] do_vmi_munmap+0x1f1/0x2b0 [ 31.110431] mmap_region+0x1f9/0x2660 [ 31.110749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.111102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.111574] ? __pfx_lock_acquire+0x10/0x10 [ 31.111903] ? __pfx_mmap_region+0x10/0x10 [ 31.112250] ? security_mmap_addr+0x7d/0xa0 [ 31.112607] ? get_unmapped_area+0x1f5/0x3f0 [ 31.112973] do_mmap+0x854/0xf00 [ 31.113283] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.113611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.113988] ksys_mmap_pgoff+0x3af/0x500 [ 31.114339] do_syscall_64+0x3f/0x90 [ 31.114679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.115133] RIP: 0033:0x7f874f560d82 [ 31.115451] 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 [ 31.116832] RSP: 002b:00007ffdfc0a3c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.117468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f874f560d82 [ 31.118068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f874e99a000 [ 31.118641] RBP: 00007f874e99a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.119249] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b77701ff70 [ 31.119797] R13: 00007ffdfc0a3c40 R14: 00007ffdfc0a3c70 R15: 00007ffdfc0a3fd0 [ 31.120366] [ 31.120560] [ 31.120697] Allocated by task 215: [ 31.120970] kasan_save_stack+0x22/0x50 [ 31.121345] kasan_set_track+0x25/0x30 [ 31.121663] __kasan_slab_alloc+0x59/0x70 [ 31.122006] kmem_cache_alloc+0x16b/0x370 [ 31.122342] vm_area_dup+0x20/0x160 [ 31.122637] __split_vma+0x170/0x950 [ 31.122937] split_vma+0xc6/0x110 [ 31.123219] mprotect_fixup+0x8d2/0xb30 [ 31.123541] do_mprotect_pkey+0x87e/0xd40 [ 31.123877] __x64_sys_mprotect+0x78/0xc0 [ 31.124218] do_syscall_64+0x3f/0x90 [ 31.124517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.124919] [ 31.125055] Freed by task 215: [ 31.125410] kasan_save_stack+0x22/0x50 [ 31.125782] kasan_set_track+0x25/0x30 [ 31.126220] kasan_save_free_info+0x2b/0x50 [ 31.126617] __kasan_slab_free+0x10a/0x190 [ 31.126982] kmem_cache_free+0x10d/0x4d0 [ 31.127325] rcu_core+0x8c8/0x2860 [ 31.127625] __do_softirq+0x1b7/0x7d4 [ 31.127966] [ 31.128134] Last potentially related work creation: [ 31.128582] kasan_save_stack+0x22/0x50 [ 31.128961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.129476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.129946] remove_vma+0x139/0x170 [ 31.130271] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.130627] do_vmi_munmap+0x1f1/0x2b0 [ 31.130957] __vm_munmap+0x138/0x3a0 [ 31.131284] __x64_sys_munmap+0x59/0x80 [ 31.131622] do_syscall_64+0x3f/0x90 [ 31.131967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.132471] [ 31.132632] The buggy address belongs to the object at ffff888019c47740 [ 31.132632] which belongs to the cache vm_area_struct of size 168 [ 31.133705] The buggy address is located 88 bytes inside of [ 31.133705] freed 168-byte region [ffff888019c47740, ffff888019c477e8) [ 31.134682] [ 31.134824] The buggy address belongs to the physical page: [ 31.135275] page:000000002846cc6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c47 [ 31.136032] memcg:ffff8880094b6301 [ 31.136349] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.136775] page_type: 0xffffffff() [ 31.137078] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.137742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b6301 [ 31.138346] page dumped because: kasan: bad access detected [ 31.138769] [ 31.138902] Memory state around the buggy address: [ 31.139261] ffff888019c47680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.139825] ffff888019c47700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.140408] >ffff888019c47780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.140969] ^ [ 31.141327] ffff888019c47800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.141875] ffff888019c47880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.142428] ================================================================== [ 31.143067] Disabling lock debugging due to kernel taint [ 32.746345] BUG: Bad rss-counter state mm:00000000071240b6 type:MM_FILEPAGES val:33 [ 32.747035] BUG: Bad rss-counter state mm:00000000071240b6 type:MM_ANONPAGES val:22 [ 33.111760] BUG: Bad rss-counter state mm:00000000edf57298 type:MM_FILEPAGES val:33 [ 33.112882] BUG: Bad rss-counter state mm:00000000edf57298 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9104' (ECDSA) to the list of known hosts. 2023/06/21 08:59:17 fuzzer started 2023/06/21 08:59:17 dialing manager at localhost:36067 2023/06/21 08:59:17 checking machine... 2023/06/21 08:59:17 checking revisions... [ 33.705782] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:59:17 testing simple program... [ 33.748614] cgroup: Unknown subsys name 'net' [ 33.782958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:59:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f4a44d494e0 CR3=0000000019e50000 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=2037313a39353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff8613f401 RDX=ffff88800ff876e0 RSI=0000000000000000 RDI=ffff88800ff874c0 RBP=ffff88800ff80000 RSP=ffff88800ff87480 R8 =ffffffff8613f412 R9 =ffff88800ff874f0 R10=0000000000038001 R11=0000000000021e7d R12=ffff88800ff87510 R13=ffff88800ff874f8 R14=ffff88800ff876d8 R15=ffff88800ff874b0 RIP=ffffffff81130930 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 00007f0fa1332900 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=00007f0fa1301008 CR3=000000000fe0a000 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