syzkaller login: [ 31.928478] BUG: Bad rss-counter state mm:000000004aa41666 type:MM_FILEPAGES val:33 [ 31.929486] BUG: Bad rss-counter state mm:000000004aa41666 type:MM_ANONPAGES val:22 [ 32.130786] ================================================================== [ 32.131712] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.132641] Read of size 8 at addr ffff888014761d08 by task sshd/220 [ 32.133414] [ 32.133634] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.134499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.135487] Call Trace: [ 32.135814] [ 32.136243] dump_stack_lvl+0x91/0xf0 [ 32.136747] print_report+0xcc/0x620 [ 32.137229] ? __virt_addr_valid+0x102/0x340 [ 32.137780] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.138430] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.139069] kasan_report+0xbe/0xf0 [ 32.139544] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.140164] vma_interval_tree_remove+0xc75/0xec0 [ 32.140761] vma_prepare+0xc54/0x11a0 [ 32.141236] __split_vma+0x5af/0x950 [ 32.141708] ? __pfx___split_vma+0x10/0x10 [ 32.142230] ? find_held_lock+0x2c/0x110 [ 32.142768] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.143334] ? lock_is_held_type+0x9f/0x120 [ 32.143871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.144477] ? mtree_range_walk+0x632/0x900 [ 32.145025] ? mas_walk+0x5c7/0x7c0 [ 32.145497] do_vmi_munmap+0x1f1/0x2b0 [ 32.145984] mmap_region+0x1f9/0x2660 [ 32.146478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.146993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.147700] ? __pfx_lock_acquire+0x10/0x10 [ 32.148236] ? __pfx_mmap_region+0x10/0x10 [ 32.148762] ? security_mmap_addr+0x7d/0xa0 [ 32.149288] ? get_unmapped_area+0x1f5/0x3f0 [ 32.149836] do_mmap+0x854/0xf00 [ 32.150274] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.150780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.151342] ksys_mmap_pgoff+0x3af/0x500 [ 32.151843] do_syscall_64+0x3f/0x90 [ 32.152323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.152966] RIP: 0033:0x7f6a4e45ad82 [ 32.153422] 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 [ 32.155567] RSP: 002b:00007ffdbdde5708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.156490] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a4e45ad82 [ 32.157349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a4d894000 [ 32.158198] RBP: 00007f6a4d894000 R08: 0000000000000009 R09: 0000000000001000 [ 32.159060] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b1e6d6ec0 [ 32.159904] R13: 00007ffdbdde5720 R14: 00007ffdbdde5750 R15: 00007ffdbdde5ab0 [ 32.160759] [ 32.161046] [ 32.161259] Allocated by task 213: [ 32.161688] kasan_save_stack+0x22/0x50 [ 32.162189] kasan_set_track+0x25/0x30 [ 32.162702] __kasan_slab_alloc+0x59/0x70 [ 32.163223] kmem_cache_alloc+0x16b/0x370 [ 32.163740] vm_area_dup+0x20/0x160 [ 32.164194] __split_vma+0x170/0x950 [ 32.164660] split_vma+0xc6/0x110 [ 32.165095] mprotect_fixup+0x8d2/0xb30 [ 32.165597] do_mprotect_pkey+0x87e/0xd40 [ 32.166115] __x64_sys_mprotect+0x78/0xc0 [ 32.166656] do_syscall_64+0x3f/0x90 [ 32.167126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.167761] [ 32.167976] Freed by task 213: [ 32.168368] kasan_save_stack+0x22/0x50 [ 32.168873] kasan_set_track+0x25/0x30 [ 32.169357] kasan_save_free_info+0x2b/0x50 [ 32.169900] __kasan_slab_free+0x10a/0x190 [ 32.170450] kmem_cache_free+0x10d/0x4d0 [ 32.170958] rcu_core+0x8c8/0x2860 [ 32.171396] __do_softirq+0x1b7/0x7d4 [ 32.171877] [ 32.172091] Last potentially related work creation: [ 32.172679] kasan_save_stack+0x22/0x50 [ 32.173182] __kasan_record_aux_stack+0x8e/0xa0 [ 32.173751] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.174396] remove_vma+0x139/0x170 [ 32.174842] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.175400] do_vmi_munmap+0x1f1/0x2b0 [ 32.175887] __vm_munmap+0x138/0x3a0 [ 32.176349] __x64_sys_munmap+0x59/0x80 [ 32.176850] do_syscall_64+0x3f/0x90 [ 32.177390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.178031] [ 32.178245] The buggy address belongs to the object at ffff888014761cb0 [ 32.178245] which belongs to the cache vm_area_struct of size 168 [ 32.179732] The buggy address is located 88 bytes inside of [ 32.179732] freed 168-byte region [ffff888014761cb0, ffff888014761d58) [ 32.181127] [ 32.181342] The buggy address belongs to the physical page: [ 32.181994] page:000000001d8e2185 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14761 [ 32.183096] memcg:ffff88801464f201 [ 32.183523] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.184173] page_type: 0xffffffff() [ 32.184622] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.185537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801464f201 [ 32.186458] page dumped because: kasan: bad access detected [ 32.187112] [ 32.187326] Memory state around the buggy address: [ 32.187907] ffff888014761c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.188774] ffff888014761c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.189640] >ffff888014761d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.190508] ^ [ 32.190952] ffff888014761d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.191809] ffff888014761e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.192660] ================================================================== [ 32.193590] Disabling lock debugging due to kernel taint [ 34.172570] BUG: Bad rss-counter state mm:00000000ef96a625 type:MM_FILEPAGES val:33 [ 34.173681] BUG: Bad rss-counter state mm:00000000ef96a625 type:MM_ANONPAGES val:22 [ 34.742114] BUG: Bad rss-counter state mm:0000000084b24ca2 type:MM_FILEPAGES val:33 [ 34.743733] BUG: Bad rss-counter state mm:0000000084b24ca2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15221' (ECDSA) to the list of known hosts. 2023/06/19 16:40:53 fuzzer started 2023/06/19 16:40:53 dialing manager at localhost:44161 2023/06/19 16:40:53 checking machine... 2023/06/19 16:40:53 checking revisions... [ 35.379380] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:40:53 testing simple program... [ 35.420576] cgroup: Unknown subsys name 'net' [ 35.482595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:40:52 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f799b40 RSI=ffffffff813c7e69 RDI=0000000000000006 RBP=ffff888017ce7d00 RSP=ffff888017ce7c40 R8 =0000000000000006 R9 =00000000002aa4fc R10=0000000000453280 R11=0000000000000000 R12=00000000002aa4fc R13=ffffffffffffffff R14=0000000000453280 R15=0000000000000016 RIP=ffffffff813c7e73 RFL=00000006 [-----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 00007f81e5e9a700 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=0000556ca69fa000 CR3=0000000016198000 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=2032353a30343a3631203931206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303831303420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a30343a3631203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f6f6f0e17e0 CR3=000000000f64a000 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=3c1c7bde67fbf792e84fd6101b99f4b8 XMM02=ec2efd57dc4c00df000000000011c980 XMM03=6250be805a7fa70e000000000011ca50 XMM04=e8fa6db8197fedb000000000000ae988 XMM05=43b96cbbb004d8eb0000000000134ca0 XMM06=4fda316b135da52b0000000000133d40 XMM07=fb795ef6d65770560000000000124000 XMM08=2c67c8bc2e329bc3000000000011c9f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000