syzkaller login: [ 30.981283] BUG: Bad rss-counter state mm:00000000eb6c0a18 type:MM_FILEPAGES val:33 [ 30.982741] BUG: Bad rss-counter state mm:00000000eb6c0a18 type:MM_ANONPAGES val:22 [ 31.158885] ================================================================== [ 31.159766] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.160666] Read of size 8 at addr ffff88800c638228 by task sshd/219 [ 31.161553] [ 31.161763] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.162597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.163519] Call Trace: [ 31.163833] [ 31.164100] dump_stack_lvl+0x91/0xf0 [ 31.164578] print_report+0xcc/0x620 [ 31.165031] ? __virt_addr_valid+0x102/0x340 [ 31.165595] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.166188] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.166772] kasan_report+0xbe/0xf0 [ 31.167233] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167828] vma_interval_tree_remove+0xc75/0xec0 [ 31.168431] vma_prepare+0xc54/0x11a0 [ 31.168897] __split_vma+0x5af/0x950 [ 31.169377] ? __pfx___split_vma+0x10/0x10 [ 31.169899] ? find_held_lock+0x2c/0x110 [ 31.170441] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.170990] ? lock_is_held_type+0x9f/0x120 [ 31.171529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.172101] ? mtree_range_walk+0x632/0x900 [ 31.172634] ? mas_walk+0x5c7/0x7c0 [ 31.173086] do_vmi_munmap+0x1f1/0x2b0 [ 31.173579] mmap_region+0x1f9/0x2660 [ 31.174036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.174534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.175248] ? __pfx_lock_acquire+0x10/0x10 [ 31.175781] ? __pfx_mmap_region+0x10/0x10 [ 31.176315] ? security_mmap_addr+0x7d/0xa0 [ 31.176839] ? get_unmapped_area+0x1f5/0x3f0 [ 31.177426] do_mmap+0x854/0xf00 [ 31.177848] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.178341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.178945] ksys_mmap_pgoff+0x3af/0x500 [ 31.179497] do_syscall_64+0x3f/0x90 [ 31.180017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.180703] RIP: 0033:0x7fa71982ed82 [ 31.181161] 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 [ 31.183307] RSP: 002b:00007ffc64fffe58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.184232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa71982ed82 [ 31.185081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa718c68000 [ 31.185954] RBP: 00007fa718c68000 R08: 0000000000000009 R09: 0000000000001000 [ 31.186795] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556256881d90 [ 31.187655] R13: 00007ffc64fffe70 R14: 00007ffc64fffea0 R15: 00007ffc65000200 [ 31.188833] [ 31.189224] [ 31.189541] Allocated by task 212: [ 31.190117] kasan_save_stack+0x22/0x50 [ 31.190800] kasan_set_track+0x25/0x30 [ 31.191460] __kasan_slab_alloc+0x59/0x70 [ 31.192160] kmem_cache_alloc+0x16b/0x370 [ 31.192845] vm_area_dup+0x20/0x160 [ 31.193364] __split_vma+0x170/0x950 [ 31.194010] split_vma+0xc6/0x110 [ 31.194518] mprotect_fixup+0x8d2/0xb30 [ 31.195011] do_mprotect_pkey+0x87e/0xd40 [ 31.195536] __x64_sys_mprotect+0x78/0xc0 [ 31.196064] do_syscall_64+0x3f/0x90 [ 31.196556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197213] [ 31.197462] Freed by task 212: [ 31.197856] kasan_save_stack+0x22/0x50 [ 31.198366] kasan_set_track+0x25/0x30 [ 31.198858] kasan_save_free_info+0x2b/0x50 [ 31.199385] __kasan_slab_free+0x10a/0x190 [ 31.199913] kmem_cache_free+0x10d/0x4d0 [ 31.200424] rcu_core+0x8c8/0x2860 [ 31.200864] __do_softirq+0x1b7/0x7d4 [ 31.201367] [ 31.201582] Last potentially related work creation: [ 31.202178] kasan_save_stack+0x22/0x50 [ 31.202685] __kasan_record_aux_stack+0x8e/0xa0 [ 31.203259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.203903] remove_vma+0x139/0x170 [ 31.204351] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.204911] do_vmi_munmap+0x1f1/0x2b0 [ 31.205447] __vm_munmap+0x138/0x3a0 [ 31.205912] __x64_sys_munmap+0x59/0x80 [ 31.206422] do_syscall_64+0x3f/0x90 [ 31.206887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207538] [ 31.207748] Second to last potentially related work creation: [ 31.208441] kasan_save_stack+0x22/0x50 [ 31.208938] __kasan_record_aux_stack+0x8e/0xa0 [ 31.209558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.210208] remove_vma+0x139/0x170 [ 31.210665] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.211224] do_vmi_munmap+0x1f1/0x2b0 [ 31.211702] mmap_region+0x1f9/0x2660 [ 31.212189] do_mmap+0x854/0xf00 [ 31.212614] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.213087] ksys_mmap_pgoff+0x3af/0x500 [ 31.213601] do_syscall_64+0x3f/0x90 [ 31.214077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214748] [ 31.214955] The buggy address belongs to the object at ffff88800c6381d0 [ 31.214955] which belongs to the cache vm_area_struct of size 168 [ 31.216421] The buggy address is located 88 bytes inside of [ 31.216421] freed 168-byte region [ffff88800c6381d0, ffff88800c638278) [ 31.217838] [ 31.218055] The buggy address belongs to the physical page: [ 31.218733] page:0000000062b3d638 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc638 [ 31.219802] memcg:ffff88800ec39101 [ 31.220234] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.220871] page_type: 0xffffffff() [ 31.221330] raw: 0100000000000200 ffff8880087a0c80 ffffea00001a6180 dead000000000002 [ 31.222271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec39101 [ 31.223185] page dumped because: kasan: bad access detected [ 31.223849] [ 31.224066] Memory state around the buggy address: [ 31.224649] ffff88800c638100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.225529] ffff88800c638180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.226411] >ffff88800c638200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.227254] ^ [ 31.227798] ffff88800c638280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.228661] ffff88800c638300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.229522] ================================================================== [ 31.230512] Disabling lock debugging due to kernel taint [ 34.061262] BUG: Bad rss-counter state mm:00000000e08cf8b2 type:MM_FILEPAGES val:33 [ 34.062675] BUG: Bad rss-counter state mm:00000000e08cf8b2 type:MM_ANONPAGES val:22 [ 34.544724] BUG: Bad rss-counter state mm:00000000d58d5c5c type:MM_FILEPAGES val:33 [ 34.545996] BUG: Bad rss-counter state mm:00000000d58d5c5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11362' (ECDSA) to the list of known hosts. 2023/06/21 05:36:06 fuzzer started 2023/06/21 05:36:06 dialing manager at localhost:36067 2023/06/21 05:36:06 checking machine... 2023/06/21 05:36:06 checking revisions... [ 35.191780] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:36:06 testing simple program... [ 35.237128] cgroup: Unknown subsys name 'net' [ 35.294273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:06 Registers: info registers vcpu 0 RAX=ffffffff86138b62 RBX=0000000000000001 RCX=ffffffff86138b62 RDX=0000000000000000 RSI=ffffffff86138b62 RDI=ffffffff85dfde00 RBP=ffff8880178f7540 RSP=ffff8880178f7478 R8 =ffffffff86138b62 R9 =ffff8880178f7528 R10=0000000000038001 R11=0000000000020d0f R12=ffff8880178f7548 R13=ffff8880178f7530 R14=ffff8880178f7529 R15=ffff8880178f74e8 RIP=ffffffff81130884 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 00007faba4957700 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=00007fff8debbb98 CR3=000000000c442000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035303a3633 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383735 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880166ef9a0 RCX=ffffffff86138e01 RDX=1ffff11002cddf3f RSI=0000000000000000 RDI=ffff8880166ef9a0 RBP=ffff8880166ef9f8 RSP=ffff8880166ef988 R8 =ffffffff86138e90 R9 =ffff8880166ef9e0 R10=0000000000038001 R11=0000000000020d8f R12=ffff8880166efa68 R13=0000000000000000 R14=ffff888015cfb680 R15=ffff88800cf0da00 RIP=ffffffff8113038e 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f02f70ee900 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=00007f02f76a5618 CR3=0000000016a30000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000