syzkaller login: [ 114.053550] BUG: Bad rss-counter state mm:0000000031ca8e75 type:MM_FILEPAGES val:33 [ 114.055036] BUG: Bad rss-counter state mm:0000000031ca8e75 type:MM_ANONPAGES val:22 [ 114.218333] ================================================================== [ 114.219276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 114.220244] Read of size 8 at addr ffff88800b975310 by task sshd/220 [ 114.221007] [ 114.221228] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 114.222284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 114.223261] Call Trace: [ 114.223588] [ 114.223884] dump_stack_lvl+0x91/0xf0 [ 114.224383] print_report+0xcc/0x620 [ 114.224871] ? __virt_addr_valid+0x102/0x340 [ 114.225422] ? vma_interval_tree_remove+0xc75/0xec0 [ 114.226037] ? vma_interval_tree_remove+0xc75/0xec0 [ 114.226650] kasan_report+0xbe/0xf0 [ 114.227127] ? vma_interval_tree_remove+0xc75/0xec0 [ 114.227771] vma_interval_tree_remove+0xc75/0xec0 [ 114.228380] vma_prepare+0xc54/0x11a0 [ 114.228858] __split_vma+0x5af/0x950 [ 114.229327] ? __pfx___split_vma+0x10/0x10 [ 114.229865] ? find_held_lock+0x2c/0x110 [ 114.230390] do_vmi_align_munmap+0x2ba/0x11f0 [ 114.230955] ? lock_is_held_type+0x9f/0x120 [ 114.231505] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 114.232135] ? mtree_range_walk+0x632/0x900 [ 114.232689] ? mas_walk+0x5c7/0x7c0 [ 114.233174] do_vmi_munmap+0x1f1/0x2b0 [ 114.233671] mmap_region+0x1f9/0x2660 [ 114.234166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 114.234683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 114.235402] ? __pfx_lock_acquire+0x10/0x10 [ 114.235954] ? __pfx_mmap_region+0x10/0x10 [ 114.236503] ? security_mmap_addr+0x7d/0xa0 [ 114.237047] ? get_unmapped_area+0x1f5/0x3f0 [ 114.237599] do_mmap+0x854/0xf00 [ 114.238044] vm_mmap_pgoff+0x1a6/0x3a0 [ 114.238546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 114.239108] ksys_mmap_pgoff+0x3af/0x500 [ 114.239621] do_syscall_64+0x3f/0x90 [ 114.240141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 114.240788] RIP: 0033:0x7f9dc5ab4d82 [ 114.241242] 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 [ 114.243402] RSP: 002b:00007ffd64085288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 114.244353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dc5ab4d82 [ 114.245238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dc4eee000 [ 114.246101] RBP: 00007f9dc4eee000 R08: 0000000000000009 R09: 0000000000001000 [ 114.246971] R10: 0000000000000812 R11: 0000000000000206 R12: 000056403efe6ec0 [ 114.247850] R13: 00007ffd640852a0 R14: 00007ffd640852d0 R15: 00007ffd64085630 [ 114.248712] [ 114.249022] [ 114.249234] Allocated by task 213: [ 114.249671] kasan_save_stack+0x22/0x50 [ 114.250178] kasan_set_track+0x25/0x30 [ 114.250681] __kasan_slab_alloc+0x59/0x70 [ 114.251235] kmem_cache_alloc+0x16b/0x370 [ 114.251775] vm_area_dup+0x20/0x160 [ 114.252243] __split_vma+0x170/0x950 [ 114.252717] split_vma+0xc6/0x110 [ 114.253167] mprotect_fixup+0x8d2/0xb30 [ 114.253668] do_mprotect_pkey+0x87e/0xd40 [ 114.254201] __x64_sys_mprotect+0x78/0xc0 [ 114.254734] do_syscall_64+0x3f/0x90 [ 114.255208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 114.255868] [ 114.256082] Freed by task 213: [ 114.256479] kasan_save_stack+0x22/0x50 [ 114.256985] kasan_set_track+0x25/0x30 [ 114.257476] kasan_save_free_info+0x2b/0x50 [ 114.258010] __kasan_slab_free+0x10a/0x190 [ 114.258544] kmem_cache_free+0x10d/0x4d0 [ 114.259056] rcu_core+0x8c8/0x2860 [ 114.259503] __do_softirq+0x1b7/0x7d4 [ 114.259989] [ 114.260207] Last potentially related work creation: [ 114.260799] kasan_save_stack+0x22/0x50 [ 114.261309] __kasan_record_aux_stack+0x8e/0xa0 [ 114.261895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 114.262546] remove_vma+0x139/0x170 [ 114.263001] do_vmi_align_munmap+0xd4a/0x11f0 [ 114.263563] do_vmi_munmap+0x1f1/0x2b0 [ 114.264064] __vm_munmap+0x138/0x3a0 [ 114.264542] __x64_sys_munmap+0x59/0x80 [ 114.265045] do_syscall_64+0x3f/0x90 [ 114.265524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 114.266227] [ 114.266446] The buggy address belongs to the object at ffff88800b9752b8 [ 114.266446] which belongs to the cache vm_area_struct of size 168 [ 114.267969] The buggy address is located 88 bytes inside of [ 114.267969] freed 168-byte region [ffff88800b9752b8, ffff88800b975360) [ 114.269452] [ 114.269678] The buggy address belongs to the physical page: [ 114.270364] page:00000000d88f4f75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb975 [ 114.271490] memcg:ffff88800f2da201 [ 114.271936] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 114.272645] page_type: 0xffffffff() [ 114.273099] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 114.274063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2da201 [ 114.274974] page dumped because: kasan: bad access detected [ 114.275635] [ 114.275866] Memory state around the buggy address: [ 114.276440] ffff88800b975200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 114.277333] ffff88800b975280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 114.278193] >ffff88800b975300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 114.279048] ^ [ 114.279517] ffff88800b975380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 114.280381] ffff88800b975400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 114.281228] ================================================================== [ 114.282184] Disabling lock debugging due to kernel taint [ 116.112298] BUG: Bad rss-counter state mm:000000007b125729 type:MM_FILEPAGES val:33 [ 116.113465] BUG: Bad rss-counter state mm:000000007b125729 type:MM_ANONPAGES val:22 [ 116.625214] BUG: Bad rss-counter state mm:000000009b543e6f type:MM_FILEPAGES val:33 [ 116.626364] BUG: Bad rss-counter state mm:000000009b543e6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60881' (ECDSA) to the list of known hosts. 2023/06/20 03:21:15 fuzzer started 2023/06/20 03:21:15 dialing manager at localhost:44161 2023/06/20 03:21:15 checking machine... 2023/06/20 03:21:15 checking revisions... [ 117.240331] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:21:15 testing simple program... [ 117.294622] cgroup: Unknown subsys name 'net' [ 117.357134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:19:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801453d1c0 RSI=ffffffff81ef7a9a RDI=0000000000000001 RBP=0000000000000001 RSP=ffff8880145e7860 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000008 R13=0000000000000008 R14=0000000000000005 R15=ffff8880145e7910 RIP=ffffffff81ef7aa1 RFL=00000203 [------C] 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 00007ff0f97d9900 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=00007f1908976650 CR3=000000000c9b0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=10a5e883fdc6c22800000000000ae988 XMM05=c2ba533b5d805e04000000000013cd80 XMM06=4fda316b135da52b000000000013b800 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007fffaa8b1ca8 CR3=000000000c64e000 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=2034313a31323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000