syzkaller login: [ 38.562797] BUG: Bad rss-counter state mm:000000007acae033 type:MM_FILEPAGES val:33 [ 38.563541] BUG: Bad rss-counter state mm:000000007acae033 type:MM_ANONPAGES val:22 [ 38.733620] ================================================================== [ 38.734213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.734875] Read of size 8 at addr ffff88800c7b9968 by task sshd/220 [ 38.735372] [ 38.735520] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.736078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.736704] Call Trace: [ 38.736918] [ 38.737107] dump_stack_lvl+0x91/0xf0 [ 38.737435] print_report+0xcc/0x620 [ 38.737759] ? __virt_addr_valid+0x102/0x340 [ 38.738123] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.739234] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.739699] kasan_report+0xbe/0xf0 [ 38.740016] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.740470] vma_interval_tree_remove+0xc75/0xec0 [ 38.740868] vma_prepare+0xc54/0x11a0 [ 38.741187] __split_vma+0x5af/0x950 [ 38.741547] ? __pfx___split_vma+0x10/0x10 [ 38.741897] ? find_held_lock+0x2c/0x110 [ 38.742244] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.742703] ? lock_is_held_type+0x9f/0x120 [ 38.743062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.743812] ? mtree_range_walk+0x632/0x900 [ 38.744180] ? mas_walk+0x5c7/0x7c0 [ 38.744544] do_vmi_munmap+0x1f1/0x2b0 [ 38.744868] mmap_region+0x1f9/0x2660 [ 38.745185] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.745578] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.746487] ? __pfx_lock_acquire+0x10/0x10 [ 38.746895] ? __pfx_mmap_region+0x10/0x10 [ 38.747248] ? security_mmap_addr+0x7d/0xa0 [ 38.747644] ? get_unmapped_area+0x1f5/0x3f0 [ 38.748008] do_mmap+0x854/0xf00 [ 38.748373] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.748708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.749080] ksys_mmap_pgoff+0x3af/0x500 [ 38.749462] do_syscall_64+0x3f/0x90 [ 38.749782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.750210] RIP: 0033:0x7f72ed5ead82 [ 38.750595] 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 [ 38.752045] RSP: 002b:00007ffe7090b878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.752679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72ed5ead82 [ 38.753230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72eca24000 [ 38.753855] RBP: 00007f72eca24000 R08: 0000000000000009 R09: 0000000000001000 [ 38.754456] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eae5820f70 [ 38.755049] R13: 00007ffe7090b890 R14: 00007ffe7090b8c0 R15: 00007ffe7090bc20 [ 38.755708] [ 38.755905] [ 38.756049] Allocated by task 213: [ 38.756377] kasan_save_stack+0x22/0x50 [ 38.756711] kasan_set_track+0x25/0x30 [ 38.757037] __kasan_slab_alloc+0x59/0x70 [ 38.757429] kmem_cache_alloc+0x16b/0x370 [ 38.757769] vm_area_dup+0x20/0x160 [ 38.758071] __split_vma+0x170/0x950 [ 38.758466] split_vma+0xc6/0x110 [ 38.758788] mprotect_fixup+0x8d2/0xb30 [ 38.759143] do_mprotect_pkey+0x87e/0xd40 [ 38.759534] __x64_sys_mprotect+0x78/0xc0 [ 38.759876] do_syscall_64+0x3f/0x90 [ 38.760191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.760665] [ 38.760809] Freed by task 13: [ 38.761062] kasan_save_stack+0x22/0x50 [ 38.761442] kasan_set_track+0x25/0x30 [ 38.761770] kasan_save_free_info+0x2b/0x50 [ 38.762120] __kasan_slab_free+0x10a/0x190 [ 38.762530] kmem_cache_free+0x10d/0x4d0 [ 38.762872] rcu_core+0x8c8/0x2860 [ 38.763167] __do_softirq+0x1b7/0x7d4 [ 38.763574] [ 38.763720] Last potentially related work creation: [ 38.764100] kasan_save_stack+0x22/0x50 [ 38.764479] __kasan_record_aux_stack+0x8e/0xa0 [ 38.764865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.765288] remove_vma+0x139/0x170 [ 38.765634] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.766001] do_vmi_munmap+0x1f1/0x2b0 [ 38.766367] __vm_munmap+0x138/0x3a0 [ 38.766711] __x64_sys_munmap+0x59/0x80 [ 38.767040] do_syscall_64+0x3f/0x90 [ 38.767399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.767819] [ 38.767964] Second to last potentially related work creation: [ 38.768480] kasan_save_stack+0x22/0x50 [ 38.768810] __kasan_record_aux_stack+0x8e/0xa0 [ 38.769181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.769647] remove_vma+0x139/0x170 [ 38.769943] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.770349] do_vmi_munmap+0x1f1/0x2b0 [ 38.770692] __vm_munmap+0x138/0x3a0 [ 38.771019] elf_map+0x26f/0x310 [ 38.771379] load_elf_binary+0xd82/0x5030 [ 38.771754] bprm_execve+0x803/0x1940 [ 38.772060] do_execveat_common+0x734/0x8e0 [ 38.772453] __x64_sys_execve+0x93/0xc0 [ 38.772772] do_syscall_64+0x3f/0x90 [ 38.773086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.773586] [ 38.773729] The buggy address belongs to the object at ffff88800c7b9910 [ 38.773729] which belongs to the cache vm_area_struct of size 168 [ 38.774745] The buggy address is located 88 bytes inside of [ 38.774745] freed 168-byte region [ffff88800c7b9910, ffff88800c7b99b8) [ 38.775794] [ 38.775942] The buggy address belongs to the physical page: [ 38.776415] page:00000000047c9468 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b9 [ 38.777119] memcg:ffff88800f877301 [ 38.777445] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.777869] page_type: 0xffffffff() [ 38.778167] raw: 0100000000000200 ffff8880087a0c80 ffffea0000318980 dead000000000006 [ 38.778881] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f877301 [ 38.779512] page dumped because: kasan: bad access detected [ 38.779943] [ 38.780085] Memory state around the buggy address: [ 38.780514] ffff88800c7b9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.781071] ffff88800c7b9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.781668] >ffff88800c7b9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.782218] ^ [ 38.782811] ffff88800c7b9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.783500] ffff88800c7b9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.784097] ================================================================== [ 38.802975] Disabling lock debugging due to kernel taint [ 42.870643] BUG: Bad rss-counter state mm:00000000a486f635 type:MM_FILEPAGES val:33 [ 42.871287] BUG: Bad rss-counter state mm:00000000a486f635 type:MM_ANONPAGES val:22 [ 43.531965] BUG: Bad rss-counter state mm:0000000056ff9ab7 type:MM_FILEPAGES val:33 [ 43.532926] BUG: Bad rss-counter state mm:0000000056ff9ab7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56905' (ECDSA) to the list of known hosts. 2023/06/21 08:04:28 fuzzer started 2023/06/21 08:04:29 dialing manager at localhost:36067 2023/06/21 08:04:29 checking machine... 2023/06/21 08:04:29 checking revisions... [ 44.442583] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:04:29 testing simple program... [ 44.497515] cgroup: Unknown subsys name 'net' [ 44.574637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:04:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd9e3557000 CR3=0000000013ada000 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=f1fcb0c14e28e8bd454b28b174db0294 XMM02=2c67c8bc2e329bc3000000000011dcb0 XMM03=fb795ef6d65770560000000000121878 XMM04=a63a3b902e8bec9200000000000ae988 XMM05=59d5b690e0af863b0000000000133e50 XMM06=00c3ffa147b8d8570000000000133cd8 XMM07=e042d86d42eb936e0000000000121b50 XMM08=da848efbfea76220000000000011dd10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018cd7d90 RCX=ffffffff817158c7 RDX=ffff8880162351c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea000069e080 RSP=ffff888018cd7b98 R8 =0000000000000490 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=800000001a782025 R13=ffff888009881000 R14=0000000000000000 R15=ffffea000069e080 RIP=ffffffff817158ec 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 00007f6cf0945900 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=00007f6cf10b9468 CR3=00000000143ae000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000