[ 33.984958] BUG: Bad rss-counter state mm:0000000018c6844c type:MM_FILEPAGES val:33 [ 33.986209] BUG: Bad rss-counter state mm:0000000018c6844c type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.173966] ================================================================== [ 34.174592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.175178] Read of size 8 at addr ffff888016726058 by task sshd/223 [ 34.179691] [ 34.179830] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.180364] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.184063] Call Trace: [ 34.184267] [ 34.184457] dump_stack_lvl+0x91/0xf0 [ 34.184771] print_report+0xcc/0x620 [ 34.185080] ? __virt_addr_valid+0x102/0x340 [ 34.185443] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.185829] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.186218] kasan_report+0xbe/0xf0 [ 34.186509] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.186905] vma_interval_tree_remove+0xc75/0xec0 [ 34.187289] vma_prepare+0xc54/0x11a0 [ 34.187672] __split_vma+0x5af/0x950 [ 34.187970] ? __pfx___split_vma+0x10/0x10 [ 34.188302] ? find_held_lock+0x2c/0x110 [ 34.188655] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.189003] ? lock_is_held_type+0x9f/0x120 [ 34.189339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.189759] ? mtree_range_walk+0x632/0x900 [ 34.190109] ? mas_walk+0x5c7/0x7c0 [ 34.190407] do_vmi_munmap+0x1f1/0x2b0 [ 34.190713] mmap_region+0x1f9/0x2660 [ 34.191016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.191342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.191820] ? __pfx_lock_acquire+0x10/0x10 [ 34.192156] ? __pfx_mmap_region+0x10/0x10 [ 34.192497] ? security_mmap_addr+0x7d/0xa0 [ 34.192833] ? get_unmapped_area+0x1f5/0x3f0 [ 34.193178] do_mmap+0x854/0xf00 [ 34.193487] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.193803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.194155] ksys_mmap_pgoff+0x3af/0x500 [ 34.194510] do_syscall_64+0x3f/0x90 [ 34.194825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.195231] RIP: 0033:0x7f9472bdcd82 [ 34.195628] 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 [ 34.204701] RSP: 002b:00007ffd53fd5fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.205269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9472bdcd82 [ 34.215547] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9472016000 [ 34.219798] RBP: 00007f9472016000 R08: 0000000000000009 R09: 0000000000001000 [ 34.220316] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a05954d90 [ 34.220827] R13: 00007ffd53fd5fd0 R14: 00007ffd53fd6000 R15: 00007ffd53fd6360 [ 34.221357] [ 34.221541] [ 34.221678] Allocated by task 214: [ 34.221944] kasan_save_stack+0x22/0x50 [ 34.222258] kasan_set_track+0x25/0x30 [ 34.222567] __kasan_slab_alloc+0x59/0x70 [ 34.222901] kmem_cache_alloc+0x16b/0x370 [ 34.223227] vm_area_dup+0x20/0x160 [ 34.227553] __split_vma+0x170/0x950 [ 34.227852] split_vma+0xc6/0x110 [ 34.228126] mprotect_fixup+0x8d2/0xb30 [ 34.228444] do_mprotect_pkey+0x87e/0xd40 [ 34.228774] __x64_sys_mprotect+0x78/0xc0 [ 34.229103] do_syscall_64+0x3f/0x90 [ 34.229413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.229814] [ 34.229951] Freed by task 214: [ 34.230194] kasan_save_stack+0x22/0x50 [ 34.230501] kasan_set_track+0x25/0x30 [ 34.230808] kasan_save_free_info+0x2b/0x50 [ 34.231126] __kasan_slab_free+0x10a/0x190 [ 34.239482] kmem_cache_free+0x10d/0x4d0 [ 34.239811] rcu_core+0x8c8/0x2860 [ 34.240084] __do_softirq+0x1b7/0x7d4 [ 34.240372] [ 34.240510] Last potentially related work creation: [ 34.240866] kasan_save_stack+0x22/0x50 [ 34.241176] __kasan_record_aux_stack+0x8e/0xa0 [ 34.241548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.241961] remove_vma+0x139/0x170 [ 34.242235] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.242604] do_vmi_munmap+0x1f1/0x2b0 [ 34.242903] __vm_munmap+0x138/0x3a0 [ 34.243188] __x64_sys_munmap+0x59/0x80 [ 34.247536] do_syscall_64+0x3f/0x90 [ 34.247849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.251782] [ 34.251919] The buggy address belongs to the object at ffff888016726000 [ 34.251919] which belongs to the cache vm_area_struct of size 168 [ 34.252863] The buggy address is located 88 bytes inside of [ 34.252863] freed 168-byte region [ffff888016726000, ffff8880167260a8) [ 34.253757] [ 34.253893] The buggy address belongs to the physical page: [ 34.254292] page:00000000ce53f6b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16726 [ 34.254960] memcg:ffff888008eda401 [ 34.255227] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.255662] page_type: 0xffffffff() [ 34.255941] raw: 0100000000000200 ffff88800879fc80 ffffea0000393540 dead000000000004 [ 34.256495] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008eda401 [ 34.257034] page dumped because: kasan: bad access detected [ 34.257426] [ 34.257552] Memory state around the buggy address: [ 34.257894] ffff888016725f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 34.258402] ffff888016725f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.258931] >ffff888016726000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.263554] ^ [ 34.264036] ffff888016726080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 34.267620] ffff888016726100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.268145] ================================================================== [ 34.268801] Disabling lock debugging due to kernel taint [ 36.562508] BUG: Bad rss-counter state mm:000000003b42a249 type:MM_FILEPAGES val:33 [ 36.563263] BUG: Bad rss-counter state mm:000000003b42a249 type:MM_ANONPAGES val:22 [ 37.609316] BUG: Bad rss-counter state mm:0000000005bdfa6e type:MM_FILEPAGES val:33 [ 37.609973] BUG: Bad rss-counter state mm:0000000005bdfa6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7068' (ECDSA) to the list of known hosts. 2023/06/20 10:22:04 fuzzer started 2023/06/20 10:22:04 dialing manager at localhost:44161 2023/06/20 10:22:04 checking machine... 2023/06/20 10:22:04 checking revisions... [ 38.535551] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:22:05 testing simple program... [ 38.600371] cgroup: Unknown subsys name 'net' [ 38.683390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:22:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0adb045 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff856d8220 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0adb044 R14=0000000000000001 R15=1ffff1100d9c1389 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 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=00007fffcd91dfa8 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=00007f18c458e510000055c75acc2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c7fd RBX=ffffffff85dfca8c RCX=ffffffff8180c8d9 RDX=0000000000000000 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca8c RSP=ffff88800ec9f7a0 R8 =ffffffff861375e0 R9 =ffff88800ec9f898 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfca90 R13=ffffffff85dfca8c R14=ffffffff85dfca8c R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000212 [----A--] 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=00007f6b615ee328 CR3=0000000005482000 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