syzkaller login: [ 31.450208] BUG: Bad rss-counter state mm:00000000acc1736c type:MM_FILEPAGES val:33 [ 31.450896] BUG: Bad rss-counter state mm:00000000acc1736c type:MM_ANONPAGES val:22 [ 31.576876] ================================================================== [ 31.577514] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.578145] Read of size 8 at addr ffff8880180aea50 by task sshd/219 [ 31.578654] [ 31.578801] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.579391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.580058] Call Trace: [ 31.580277] [ 31.580467] dump_stack_lvl+0x91/0xf0 [ 31.580819] print_report+0xcc/0x620 [ 31.581161] ? __virt_addr_valid+0x102/0x340 [ 31.581699] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.582118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.582528] kasan_report+0xbe/0xf0 [ 31.582844] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.583263] vma_interval_tree_remove+0xc75/0xec0 [ 31.583685] vma_prepare+0xc54/0x11a0 [ 31.584013] __split_vma+0x5af/0x950 [ 31.584330] ? __pfx___split_vma+0x10/0x10 [ 31.584704] ? find_held_lock+0x2c/0x110 [ 31.585058] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.585443] ? lock_is_held_type+0x9f/0x120 [ 31.585807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.586213] ? mtree_range_walk+0x632/0x900 [ 31.586580] ? mas_walk+0x5c7/0x7c0 [ 31.586897] do_vmi_munmap+0x1f1/0x2b0 [ 31.587226] mmap_region+0x1f9/0x2660 [ 31.587551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.587889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.588370] ? __pfx_lock_acquire+0x10/0x10 [ 31.588761] ? __pfx_mmap_region+0x10/0x10 [ 31.589114] ? security_mmap_addr+0x7d/0xa0 [ 31.589465] ? get_unmapped_area+0x1f5/0x3f0 [ 31.589829] do_mmap+0x854/0xf00 [ 31.590121] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.590461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.590837] ksys_mmap_pgoff+0x3af/0x500 [ 31.591175] do_syscall_64+0x3f/0x90 [ 31.591492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.591912] RIP: 0033:0x7f317fae4d82 [ 31.592210] 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 [ 31.593656] RSP: 002b:00007ffd4f658c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.594278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f317fae4d82 [ 31.594873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f317ef1e000 [ 31.595444] RBP: 00007f317ef1e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.596004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9da3d7ec0 [ 31.596564] R13: 00007ffd4f658cb0 R14: 00007ffd4f658ce0 R15: 00007ffd4f659040 [ 31.597174] [ 31.597372] [ 31.597520] Allocated by task 212: [ 31.597812] kasan_save_stack+0x22/0x50 [ 31.598161] kasan_set_track+0x25/0x30 [ 31.598486] __kasan_slab_alloc+0x59/0x70 [ 31.598833] kmem_cache_alloc+0x16b/0x370 [ 31.599184] vm_area_dup+0x20/0x160 [ 31.599502] __split_vma+0x170/0x950 [ 31.599818] split_vma+0xc6/0x110 [ 31.600117] mprotect_fixup+0x8d2/0xb30 [ 31.600450] do_mprotect_pkey+0x87e/0xd40 [ 31.600844] __x64_sys_mprotect+0x78/0xc0 [ 31.601198] do_syscall_64+0x3f/0x90 [ 31.601522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.601952] [ 31.602100] Freed by task 212: [ 31.602361] kasan_save_stack+0x22/0x50 [ 31.602698] kasan_set_track+0x25/0x30 [ 31.603023] kasan_save_free_info+0x2b/0x50 [ 31.603391] __kasan_slab_free+0x10a/0x190 [ 31.603745] kmem_cache_free+0x10d/0x4d0 [ 31.604087] rcu_core+0x8c8/0x2860 [ 31.604386] __do_softirq+0x1b7/0x7d4 [ 31.604732] [ 31.604875] Last potentially related work creation: [ 31.605258] kasan_save_stack+0x22/0x50 [ 31.605593] __kasan_record_aux_stack+0x8e/0xa0 [ 31.605969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.606406] remove_vma+0x139/0x170 [ 31.606715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.607126] do_vmi_munmap+0x1f1/0x2b0 [ 31.607452] __vm_munmap+0x138/0x3a0 [ 31.607766] __x64_sys_munmap+0x59/0x80 [ 31.608118] do_syscall_64+0x3f/0x90 [ 31.608466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.608936] [ 31.609077] The buggy address belongs to the object at ffff8880180ae9f8 [ 31.609077] which belongs to the cache vm_area_struct of size 168 [ 31.609869] The buggy address is located 88 bytes inside of [ 31.609869] freed 168-byte region [ffff8880180ae9f8, ffff8880180aeaa0) [ 31.610669] [ 31.610784] The buggy address belongs to the physical page: [ 31.611166] page:0000000003e2f24e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180ae [ 31.611752] memcg:ffff8880180af001 [ 31.611982] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.612342] page_type: 0xffffffff() [ 31.612584] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.613104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180af001 [ 31.613590] page dumped because: kasan: bad access detected [ 31.613943] [ 31.614059] Memory state around the buggy address: [ 31.614367] ffff8880180ae900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.614825] ffff8880180ae980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.615289] >ffff8880180aea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.615747] ^ [ 31.616128] ffff8880180aea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.616583] ffff8880180aeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.617068] ================================================================== [ 31.617650] Disabling lock debugging due to kernel taint [ 32.913624] BUG: Bad rss-counter state mm:00000000c3eed427 type:MM_FILEPAGES val:33 [ 32.914281] BUG: Bad rss-counter state mm:00000000c3eed427 type:MM_ANONPAGES val:22 [ 33.257317] BUG: Bad rss-counter state mm:00000000eb2e3d4a type:MM_FILEPAGES val:33 [ 33.258176] BUG: Bad rss-counter state mm:00000000eb2e3d4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28188' (ECDSA) to the list of known hosts. 2023/06/20 08:37:45 fuzzer started 2023/06/20 08:37:45 dialing manager at localhost:44161 2023/06/20 08:37:45 checking machine... 2023/06/20 08:37:45 checking revisions... [ 33.975247] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:37:46 testing simple program... [ 34.021854] cgroup: Unknown subsys name 'net' [ 34.060833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:37:45 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff8880169e4cf0 RCX=0000000000000000 RDX=1ffff11002d3c997 RSI=ffffffff816e7396 RDI=ffff8880169e4cb0 RBP=dffffc0000000000 RSP=ffff888019ee7998 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=00007f0cd7a9d000 R13=ffff8880169e4cf0 R14=0000000000000000 R15=ffff88800dc8a210 RIP=ffffffff816e73cc 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 00007f55f23fe900 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=00007f55f23dd020 CR3=000000001a2c6000 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=00007f4c9b343380 CR3=000000000e84c000 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=2035343a37333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a37333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000