syzkaller login: [ 31.233028] BUG: Bad rss-counter state mm:000000007d1eeead type:MM_FILEPAGES val:33 [ 31.234351] BUG: Bad rss-counter state mm:000000007d1eeead type:MM_ANONPAGES val:22 [ 31.281298] ================================================================== [ 31.282315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.283365] Read of size 8 at addr ffff8880163db310 by task sshd/221 [ 31.284220] [ 31.284464] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.285423] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.286512] Call Trace: [ 31.286870] [ 31.287185] dump_stack_lvl+0x91/0xf0 [ 31.287732] print_report+0xcc/0x620 [ 31.288263] ? __virt_addr_valid+0x102/0x340 [ 31.288870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289555] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290237] kasan_report+0xbe/0xf0 [ 31.290802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291500] vma_interval_tree_remove+0xc75/0xec0 [ 31.292186] vma_prepare+0xc54/0x11a0 [ 31.292731] __split_vma+0x5af/0x950 [ 31.293273] ? __pfx___split_vma+0x10/0x10 [ 31.293881] ? find_held_lock+0x2c/0x110 [ 31.294483] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.295126] ? lock_is_held_type+0x9f/0x120 [ 31.295747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.296443] ? mtree_range_walk+0x632/0x900 [ 31.297067] ? mas_walk+0x5c7/0x7c0 [ 31.297603] do_vmi_munmap+0x1f1/0x2b0 [ 31.298172] mmap_region+0x1f9/0x2660 [ 31.298745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.299330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.300136] ? __pfx_lock_acquire+0x10/0x10 [ 31.300748] ? __pfx_mmap_region+0x10/0x10 [ 31.301356] ? security_mmap_addr+0x7d/0xa0 [ 31.301956] ? get_unmapped_area+0x1f5/0x3f0 [ 31.302601] do_mmap+0x854/0xf00 [ 31.303087] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.303637] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304256] ksys_mmap_pgoff+0x3af/0x500 [ 31.304812] do_syscall_64+0x3f/0x90 [ 31.305337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306047] RIP: 0033:0x7f91d78e6d82 [ 31.306556] 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 [ 31.308881] RSP: 002b:00007fffc754dc78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.309861] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91d78e6d82 [ 31.310801] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91d6d20000 [ 31.311724] RBP: 00007f91d6d20000 R08: 0000000000000009 R09: 0000000000001000 [ 31.312648] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea6439fd90 [ 31.313576] R13: 00007fffc754dc90 R14: 00007fffc754dcc0 R15: 00007fffc754e020 [ 31.314531] [ 31.314851] [ 31.315087] Allocated by task 214: [ 31.315560] kasan_save_stack+0x22/0x50 [ 31.316112] kasan_set_track+0x25/0x30 [ 31.316653] __kasan_slab_alloc+0x59/0x70 [ 31.317226] kmem_cache_alloc+0x16b/0x370 [ 31.317796] vm_area_dup+0x20/0x160 [ 31.318306] __split_vma+0x170/0x950 [ 31.318816] split_vma+0xc6/0x110 [ 31.319299] mprotect_fixup+0x8d2/0xb30 [ 31.319851] do_mprotect_pkey+0x87e/0xd40 [ 31.320420] __x64_sys_mprotect+0x78/0xc0 [ 31.320994] do_syscall_64+0x3f/0x90 [ 31.321511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322210] [ 31.322471] Freed by task 214: [ 31.322902] kasan_save_stack+0x22/0x50 [ 31.323453] kasan_set_track+0x25/0x30 [ 31.323994] kasan_save_free_info+0x2b/0x50 [ 31.324575] __kasan_slab_free+0x10a/0x190 [ 31.325154] kmem_cache_free+0x10d/0x4d0 [ 31.325711] rcu_core+0x8c8/0x2860 [ 31.326194] __do_softirq+0x1b7/0x7d4 [ 31.326729] [ 31.326964] Last potentially related work creation: [ 31.327610] kasan_save_stack+0x22/0x50 [ 31.328158] __kasan_record_aux_stack+0x8e/0xa0 [ 31.328785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.329484] remove_vma+0x139/0x170 [ 31.329972] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.330586] do_vmi_munmap+0x1f1/0x2b0 [ 31.331122] __vm_munmap+0x138/0x3a0 [ 31.331634] __x64_sys_munmap+0x59/0x80 [ 31.332177] do_syscall_64+0x3f/0x90 [ 31.332708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333415] [ 31.333650] The buggy address belongs to the object at ffff8880163db2b8 [ 31.333650] which belongs to the cache vm_area_struct of size 168 [ 31.335295] The buggy address is located 88 bytes inside of [ 31.335295] freed 168-byte region [ffff8880163db2b8, ffff8880163db360) [ 31.336847] [ 31.337082] The buggy address belongs to the physical page: [ 31.337812] page:0000000028b1dc16 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163db [ 31.339019] memcg:ffff88800f29e401 [ 31.339483] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.340194] page_type: 0xffffffff() [ 31.340690] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.341725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f29e401 [ 31.342776] page dumped because: kasan: bad access detected [ 31.343521] [ 31.343765] Memory state around the buggy address: [ 31.344422] ffff8880163db200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.345384] ffff8880163db280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.346346] >ffff8880163db300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.347324] ^ [ 31.347859] ffff8880163db380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.348824] ffff8880163db400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.349778] ================================================================== [ 31.351089] Disabling lock debugging due to kernel taint [ 33.431188] BUG: Bad rss-counter state mm:000000003435e486 type:MM_FILEPAGES val:33 [ 33.432588] BUG: Bad rss-counter state mm:000000003435e486 type:MM_ANONPAGES val:22 [ 33.935090] BUG: Bad rss-counter state mm:0000000020613b04 type:MM_FILEPAGES val:33 [ 33.935841] BUG: Bad rss-counter state mm:0000000020613b04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22304' (ECDSA) to the list of known hosts. 2023/06/19 19:40:09 fuzzer started 2023/06/19 19:40:09 dialing manager at localhost:44161 2023/06/19 19:40:09 checking machine... 2023/06/19 19:40:09 checking revisions... [ 34.635585] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:40:09 testing simple program... [ 34.691393] cgroup: Unknown subsys name 'net' [ 34.742535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:40:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe4b5cacf8 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=00007fc0e3b1d51000005613b6ad1790 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=ffffffff83642d12 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002faeec0 RSI=ffffffff83642d12 RDI=ffff888017d77670 RBP=ffff888017d77640 RSP=ffff888017d775a0 R8 =0000000000000001 R9 =ffff888017d775e8 R10=0000000000038001 R11=000000000008a85c R12=ffff888017d77670 R13=0000000000000000 R14=ffff88800db99b40 R15=ffff88800da10080 RIP=ffffffff84532440 RFL=00000286 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2b41465700 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=00007f5d3d7e2fc0 CR3=0000000019e78000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732038303a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323731 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000