syzkaller login: [ 29.916043] BUG: Bad rss-counter state mm:00000000b7028808 type:MM_FILEPAGES val:33 [ 29.917289] BUG: Bad rss-counter state mm:00000000b7028808 type:MM_ANONPAGES val:22 [ 30.080591] ================================================================== [ 30.081674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.082791] Read of size 8 at addr ffff888008db0968 by task sshd/220 [ 30.083824] [ 30.084045] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.084904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.085908] Call Trace: [ 30.086245] [ 30.086531] dump_stack_lvl+0x91/0xf0 [ 30.087029] print_report+0xcc/0x620 [ 30.087522] ? __virt_addr_valid+0x102/0x340 [ 30.088093] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.088724] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.089341] kasan_report+0xbe/0xf0 [ 30.089822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.090441] vma_interval_tree_remove+0xc75/0xec0 [ 30.091044] vma_prepare+0xc54/0x11a0 [ 30.091548] __split_vma+0x5af/0x950 [ 30.092038] ? __pfx___split_vma+0x10/0x10 [ 30.092581] ? find_held_lock+0x2c/0x110 [ 30.093107] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.093680] ? lock_is_held_type+0x9f/0x120 [ 30.094227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.094835] ? mtree_range_walk+0x632/0x900 [ 30.095404] ? mas_walk+0x5c7/0x7c0 [ 30.095894] do_vmi_munmap+0x1f1/0x2b0 [ 30.096387] mmap_region+0x1f9/0x2660 [ 30.096873] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.097391] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.098113] ? __pfx_lock_acquire+0x10/0x10 [ 30.098653] ? __pfx_mmap_region+0x10/0x10 [ 30.099200] ? security_mmap_addr+0x7d/0xa0 [ 30.099735] ? get_unmapped_area+0x1f5/0x3f0 [ 30.100289] do_mmap+0x854/0xf00 [ 30.100730] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.101230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.101789] ksys_mmap_pgoff+0x3af/0x500 [ 30.102299] do_syscall_64+0x3f/0x90 [ 30.102782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103466] RIP: 0033:0x7f77f665ad82 [ 30.103925] 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 [ 30.106055] RSP: 002b:00007ffcf1128568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.106966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f77f665ad82 [ 30.107827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f77f5a94000 [ 30.108665] RBP: 00007f77f5a94000 R08: 0000000000000009 R09: 0000000000001000 [ 30.109512] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f5813cf70 [ 30.110361] R13: 00007ffcf1128580 R14: 00007ffcf11285b0 R15: 00007ffcf1128910 [ 30.111234] [ 30.111528] [ 30.111747] Allocated by task 213: [ 30.112180] kasan_save_stack+0x22/0x50 [ 30.112684] kasan_set_track+0x25/0x30 [ 30.113187] __kasan_slab_alloc+0x59/0x70 [ 30.113711] kmem_cache_alloc+0x16b/0x370 [ 30.114229] vm_area_dup+0x20/0x160 [ 30.114685] __split_vma+0x170/0x950 [ 30.115173] split_vma+0xc6/0x110 [ 30.115618] mprotect_fixup+0x8d2/0xb30 [ 30.116122] do_mprotect_pkey+0x87e/0xd40 [ 30.116650] __x64_sys_mprotect+0x78/0xc0 [ 30.117181] do_syscall_64+0x3f/0x90 [ 30.117657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.118305] [ 30.118522] Freed by task 213: [ 30.118912] kasan_save_stack+0x22/0x50 [ 30.119425] kasan_set_track+0x25/0x30 [ 30.119922] kasan_save_free_info+0x2b/0x50 [ 30.120459] __kasan_slab_free+0x10a/0x190 [ 30.120992] kmem_cache_free+0x10d/0x4d0 [ 30.121504] rcu_core+0x8c8/0x2860 [ 30.121953] __do_softirq+0x1b7/0x7d4 [ 30.122431] [ 30.122648] Last potentially related work creation: [ 30.123266] kasan_save_stack+0x22/0x50 [ 30.123776] __kasan_record_aux_stack+0x8e/0xa0 [ 30.124445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.125088] remove_vma+0x139/0x170 [ 30.125549] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.126118] do_vmi_munmap+0x1f1/0x2b0 [ 30.126607] __vm_munmap+0x138/0x3a0 [ 30.127091] __x64_sys_munmap+0x59/0x80 [ 30.127590] do_syscall_64+0x3f/0x90 [ 30.128072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.128708] [ 30.128921] The buggy address belongs to the object at ffff888008db0910 [ 30.128921] which belongs to the cache vm_area_struct of size 168 [ 30.130373] The buggy address is located 88 bytes inside of [ 30.130373] freed 168-byte region [ffff888008db0910, ffff888008db09b8) [ 30.131787] [ 30.132010] The buggy address belongs to the physical page: [ 30.132661] page:000000000dce01a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8db0 [ 30.133732] memcg:ffff88800e63b801 [ 30.134164] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.134861] page_type: 0xffffffff() [ 30.135318] raw: 0100000000000200 ffff88800879fc80 ffffea0000382e80 0000000000000009 [ 30.136231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63b801 [ 30.137139] page dumped because: kasan: bad access detected [ 30.137799] [ 30.138018] Memory state around the buggy address: [ 30.138596] ffff888008db0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.139477] ffff888008db0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.140328] >ffff888008db0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.141180] ^ [ 30.141955] ffff888008db0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.142805] ffff888008db0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.143659] ================================================================== [ 30.144593] Disabling lock debugging due to kernel taint [ 32.152939] BUG: Bad rss-counter state mm:00000000a63789c8 type:MM_FILEPAGES val:33 [ 32.154154] BUG: Bad rss-counter state mm:00000000a63789c8 type:MM_ANONPAGES val:22 [ 32.622451] BUG: Bad rss-counter state mm:00000000e6f10a4a type:MM_FILEPAGES val:33 [ 32.623485] BUG: Bad rss-counter state mm:00000000e6f10a4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15608' (ECDSA) to the list of known hosts. 2023/06/20 01:10:53 fuzzer started 2023/06/20 01:10:53 dialing manager at localhost:44161 2023/06/20 01:10:53 checking machine... 2023/06/20 01:10:53 checking revisions... [ 33.356087] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:10:54 testing simple program... [ 33.406091] cgroup: Unknown subsys name 'net' [ 33.458488] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:10:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880167aa880 RCX=ffff88801a08fbc8 RDX=00007f8ccfbf0000 RSI=ffffffff8141d078 RDI=ffff88801a08fbd0 RBP=0000000000531000 RSP=ffff88801583fd20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=1ffff11002b07fa8 R13=dffffc0000000000 R14=ffff88801a08fbc8 R15=ffff88801583fd60 RIP=ffffffff8141d095 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 00007f8ccf81a900 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=00007f8ccfbe6328 CR3=000000001ca60000 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=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=00007f3f9c7b0ec0 CR3=000000000f294000 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=2033353a30313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a30313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000