syzkaller login: [ 31.014197] BUG: Bad rss-counter state mm:00000000b1c6ca27 type:MM_FILEPAGES val:33 [ 31.015752] BUG: Bad rss-counter state mm:00000000b1c6ca27 type:MM_ANONPAGES val:22 [ 31.181269] ================================================================== [ 31.182309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.183499] Read of size 8 at addr ffff8880165f1d08 by task sshd/220 [ 31.184346] [ 31.184587] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.185569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.186643] Call Trace: [ 31.186998] [ 31.187314] dump_stack_lvl+0x91/0xf0 [ 31.187857] print_report+0xcc/0x620 [ 31.188400] ? __virt_addr_valid+0x102/0x340 [ 31.189021] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190337] kasan_report+0xbe/0xf0 [ 31.190895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191630] vma_interval_tree_remove+0xc75/0xec0 [ 31.192335] vma_prepare+0xc54/0x11a0 [ 31.192899] __split_vma+0x5af/0x950 [ 31.193461] ? __pfx___split_vma+0x10/0x10 [ 31.194082] ? find_held_lock+0x2c/0x110 [ 31.194697] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.195386] ? lock_is_held_type+0x9f/0x120 [ 31.196024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.196742] ? mtree_range_walk+0x632/0x900 [ 31.197416] ? mas_walk+0x5c7/0x7c0 [ 31.197977] do_vmi_munmap+0x1f1/0x2b0 [ 31.198569] mmap_region+0x1f9/0x2660 [ 31.199140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.199746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.200591] ? __pfx_lock_acquire+0x10/0x10 [ 31.201237] ? __pfx_mmap_region+0x10/0x10 [ 31.201866] ? security_mmap_addr+0x7d/0xa0 [ 31.202488] ? get_unmapped_area+0x1f5/0x3f0 [ 31.203137] do_mmap+0x854/0xf00 [ 31.203653] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.204237] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204896] ksys_mmap_pgoff+0x3af/0x500 [ 31.205509] do_syscall_64+0x3f/0x90 [ 31.206082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206854] RIP: 0033:0x7f1d31f70d82 [ 31.207405] 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 [ 31.210013] RSP: 002b:00007ffd47753fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.211123] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d31f70d82 [ 31.212136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d313aa000 [ 31.213142] RBP: 00007f1d313aa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.214167] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7bf554ec0 [ 31.215191] R13: 00007ffd47753fd0 R14: 00007ffd47754000 R15: 00007ffd47754360 [ 31.216226] [ 31.216579] [ 31.216836] Allocated by task 213: [ 31.217366] kasan_save_stack+0x22/0x50 [ 31.217976] kasan_set_track+0x25/0x30 [ 31.218574] __kasan_slab_alloc+0x59/0x70 [ 31.219205] kmem_cache_alloc+0x16b/0x370 [ 31.219840] vm_area_dup+0x20/0x160 [ 31.220389] __split_vma+0x170/0x950 [ 31.220952] split_vma+0xc6/0x110 [ 31.221511] mprotect_fixup+0x8d2/0xb30 [ 31.222123] do_mprotect_pkey+0x87e/0xd40 [ 31.222701] __x64_sys_mprotect+0x78/0xc0 [ 31.223248] do_syscall_64+0x3f/0x90 [ 31.223740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224471] [ 31.224697] Freed by task 213: [ 31.225098] kasan_save_stack+0x22/0x50 [ 31.225629] kasan_set_track+0x25/0x30 [ 31.226136] kasan_save_free_info+0x2b/0x50 [ 31.226719] __kasan_slab_free+0x10a/0x190 [ 31.227270] kmem_cache_free+0x10d/0x4d0 [ 31.227804] rcu_core+0x8c8/0x2860 [ 31.228263] __do_softirq+0x1b7/0x7d4 [ 31.228774] [ 31.229006] Last potentially related work creation: [ 31.229641] kasan_save_stack+0x22/0x50 [ 31.230166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.230768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.231434] remove_vma+0x139/0x170 [ 31.231916] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.232487] do_vmi_munmap+0x1f1/0x2b0 [ 31.232993] __vm_munmap+0x138/0x3a0 [ 31.233495] __x64_sys_munmap+0x59/0x80 [ 31.234029] do_syscall_64+0x3f/0x90 [ 31.234526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.235204] [ 31.235424] The buggy address belongs to the object at ffff8880165f1cb0 [ 31.235424] which belongs to the cache vm_area_struct of size 168 [ 31.236978] The buggy address is located 88 bytes inside of [ 31.236978] freed 168-byte region [ffff8880165f1cb0, ffff8880165f1d58) [ 31.238441] [ 31.238665] The buggy address belongs to the physical page: [ 31.239375] page:000000002833308c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165f1 [ 31.240521] memcg:ffff88800966b401 [ 31.240972] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.241684] page_type: 0xffffffff() [ 31.242179] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.243156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800966b401 [ 31.244111] page dumped because: kasan: bad access detected [ 31.244816] [ 31.245038] Memory state around the buggy address: [ 31.245675] ffff8880165f1c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.246637] ffff8880165f1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.247562] >ffff8880165f1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.248486] ^ [ 31.248938] ffff8880165f1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.249859] ffff8880165f1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.250762] ================================================================== [ 31.251739] Disabling lock debugging due to kernel taint [ 34.151781] BUG: Bad rss-counter state mm:00000000b90f5bd0 type:MM_FILEPAGES val:33 [ 34.153004] BUG: Bad rss-counter state mm:00000000b90f5bd0 type:MM_ANONPAGES val:22 [ 34.557892] BUG: Bad rss-counter state mm:000000003ecbafed type:MM_FILEPAGES val:33 [ 34.559282] BUG: Bad rss-counter state mm:000000003ecbafed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35126' (ECDSA) to the list of known hosts. 2023/06/20 07:25:47 fuzzer started 2023/06/20 07:25:48 dialing manager at localhost:44161 2023/06/20 07:25:48 checking machine... 2023/06/20 07:25:48 checking revisions... [ 35.339550] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:25:48 testing simple program... [ 35.384561] cgroup: Unknown subsys name 'net' [ 35.425409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:47 Registers: info registers vcpu 0 RAX=ffffed100d9c1329 RBX=1ffff1100d9c1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e7d RFL=00000282 [--S----] 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=00007f07ae8f0c40 CR3=000000000db2e000 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=2037343a35323a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a35323a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b024b RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=1ffffffff0c96049 RDI=ffffffff8604d2b8 RBP=ffff8880169870a8 RSP=ffff888016986fe0 R8 =ffffffff864b0222 R9 =ffff888016987090 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880169870b0 R13=ffff888016987098 R14=ffff888016987091 R15=ffff888016987050 RIP=ffffffff81130a5b 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 00007fdeac870900 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=00007fdeac835008 CR3=0000000016d0c000 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