syzkaller login: [ 30.164584] BUG: Bad rss-counter state mm:0000000064807aec type:MM_FILEPAGES val:33 [ 30.166225] BUG: Bad rss-counter state mm:0000000064807aec type:MM_ANONPAGES val:22 [ 30.429761] ================================================================== [ 30.430665] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.431605] Read of size 8 at addr ffff88800de87310 by task sshd/220 [ 30.432373] [ 30.432592] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.433552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.434531] Call Trace: [ 30.434848] <TASK> [ 30.435154] dump_stack_lvl+0x91/0xf0 [ 30.435645] print_report+0xcc/0x620 [ 30.436129] ? __virt_addr_valid+0x102/0x340 [ 30.436688] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.437308] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.437927] kasan_report+0xbe/0xf0 [ 30.438405] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.439038] vma_interval_tree_remove+0xc75/0xec0 [ 30.439652] vma_prepare+0xc54/0x11a0 [ 30.440134] __split_vma+0x5af/0x950 [ 30.440610] ? __pfx___split_vma+0x10/0x10 [ 30.441145] ? find_held_lock+0x2c/0x110 [ 30.441679] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.442257] ? lock_is_held_type+0x9f/0x120 [ 30.442794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.443424] ? mtree_range_walk+0x632/0x900 [ 30.443979] ? mas_walk+0x5c7/0x7c0 [ 30.444465] do_vmi_munmap+0x1f1/0x2b0 [ 30.444955] mmap_region+0x1f9/0x2660 [ 30.445443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.445961] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.446673] ? __pfx_lock_acquire+0x10/0x10 [ 30.447221] ? __pfx_mmap_region+0x10/0x10 [ 30.447763] ? security_mmap_addr+0x7d/0xa0 [ 30.448294] ? get_unmapped_area+0x1f5/0x3f0 [ 30.448852] do_mmap+0x854/0xf00 [ 30.449288] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.449789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.450352] ksys_mmap_pgoff+0x3af/0x500 [ 30.450864] do_syscall_64+0x3f/0x90 [ 30.451349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.452008] RIP: 0033:0x7ff54469dd82 [ 30.452467] 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 [ 30.454605] RSP: 002b:00007ffcc23c7018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.455529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff54469dd82 [ 30.456378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff543ad7000 [ 30.457234] RBP: 00007ff543ad7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.458088] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cb4816d90 [ 30.458931] R13: 00007ffcc23c7030 R14: 00007ffcc23c7060 R15: 00007ffcc23c73c0 [ 30.459825] </TASK> [ 30.460117] [ 30.460332] Allocated by task 213: [ 30.460767] kasan_save_stack+0x22/0x50 [ 30.461277] kasan_set_track+0x25/0x30 [ 30.461773] __kasan_slab_alloc+0x59/0x70 [ 30.462304] kmem_cache_alloc+0x16b/0x370 [ 30.462822] vm_area_dup+0x20/0x160 [ 30.463295] __split_vma+0x170/0x950 [ 30.463761] split_vma+0xc6/0x110 [ 30.464203] mprotect_fixup+0x8d2/0xb30 [ 30.464714] do_mprotect_pkey+0x87e/0xd40 [ 30.465243] __x64_sys_mprotect+0x78/0xc0 [ 30.465765] do_syscall_64+0x3f/0x90 [ 30.466240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.466893] [ 30.467132] Freed by task 213: [ 30.467557] kasan_save_stack+0x22/0x50 [ 30.468067] kasan_set_track+0x25/0x30 [ 30.468568] kasan_save_free_info+0x2b/0x50 [ 30.469103] __kasan_slab_free+0x10a/0x190 [ 30.469638] kmem_cache_free+0x10d/0x4d0 [ 30.470145] rcu_core+0x8c8/0x2860 [ 30.470591] __do_softirq+0x1b7/0x7d4 [ 30.471070] [ 30.471289] Last potentially related work creation: [ 30.471880] kasan_save_stack+0x22/0x50 [ 30.472391] __kasan_record_aux_stack+0x8e/0xa0 [ 30.472965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.473618] remove_vma+0x139/0x170 [ 30.474071] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.474642] do_vmi_munmap+0x1f1/0x2b0 [ 30.475141] __vm_munmap+0x138/0x3a0 [ 30.475654] __x64_sys_munmap+0x59/0x80 [ 30.476176] do_syscall_64+0x3f/0x90 [ 30.476649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.477291] [ 30.477514] Second to last potentially related work creation: [ 30.478203] kasan_save_stack+0x22/0x50 [ 30.478707] __kasan_record_aux_stack+0x8e/0xa0 [ 30.479289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.479935] remove_vma+0x139/0x170 [ 30.480392] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.480950] do_vmi_munmap+0x1f1/0x2b0 [ 30.481434] mmap_region+0x1f9/0x2660 [ 30.481915] do_mmap+0x854/0xf00 [ 30.482347] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.482847] ksys_mmap_pgoff+0x3af/0x500 [ 30.483372] do_syscall_64+0x3f/0x90 [ 30.483852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.484494] [ 30.484715] The buggy address belongs to the object at ffff88800de872b8 [ 30.484715] which belongs to the cache vm_area_struct of size 168 [ 30.486208] The buggy address is located 88 bytes inside of [ 30.486208] freed 168-byte region [ffff88800de872b8, ffff88800de87360) [ 30.487641] [ 30.487861] The buggy address belongs to the physical page: [ 30.488521] page:00000000f9ad9cb8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde87 [ 30.489615] memcg:ffff88800d00d001 [ 30.490055] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.490701] page_type: 0xffffffff() [ 30.491157] raw: 0100000000000200 ffff88800879fc80 ffffea0000318b00 dead000000000004 [ 30.492088] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d00d001 [ 30.492995] page dumped because: kasan: bad access detected [ 30.493662] [ 30.493876] Memory state around the buggy address: [ 30.494457] ffff88800de87200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.495356] ffff88800de87280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.496202] >ffff88800de87300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.497064] ^ [ 30.497547] ffff88800de87380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.498405] ffff88800de87400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.499269] ================================================================== [ 30.500235] Disabling lock debugging due to kernel taint [ 32.482253] BUG: Bad rss-counter state mm:000000001d476dd3 type:MM_FILEPAGES val:33 [ 32.483547] BUG: Bad rss-counter state mm:000000001d476dd3 type:MM_ANONPAGES val:22 [ 32.846750] BUG: Bad rss-counter state mm:000000007d6fe2e0 type:MM_FILEPAGES val:33 [ 32.847842] BUG: Bad rss-counter state mm:000000007d6fe2e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59990' (ECDSA) to the list of known hosts. 2023/06/19 14:07:24 fuzzer started 2023/06/19 14:07:24 dialing manager at localhost:44161 2023/06/19 14:07:24 checking machine... 2023/06/19 14:07:24 checking revisions... [ 33.549768] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:07:24 testing simple program... [ 33.587191] cgroup: Unknown subsys name 'net' [ 33.638079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:07:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800d723680 RSI=ffffffff815a547c RDI=0000000000000006 RBP=ffff888015847d28 RSP=ffff888015847c60 R8 =0000000000000006 R9 =0000000000000101 R10=000000000000001e R11=0000000000000000 R12=000000000000001e R13=ffff888015847d60 R14=0000000000000101 R15=ffffc900006420e0 RIP=ffffffff815a547c RFL=00000293 [--S-A-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 00007f7b8be4a900 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=00007f1c06c0f650 CR3=0000000013a28000 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=3429009b214ec1bc00000000000ae988 XMM05=39c4723bebe36b3700000000001374c8 XMM06=c291bd5c70af25b900000000001362b8 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=00007fff43804f38 CR3=0000000016754000 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=2033323a37303a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000