syzkaller login: [ 36.658320] BUG: Bad rss-counter state mm:000000000a0641ab type:MM_FILEPAGES val:33 [ 36.659558] BUG: Bad rss-counter state mm:000000000a0641ab type:MM_ANONPAGES val:22 [ 36.762763] ================================================================== [ 36.763842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.764986] Read of size 8 at addr ffff888019dea140 by task sshd/219 [ 36.765997] [ 36.766234] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.767156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.768192] Call Trace: [ 36.768539] [ 36.768847] dump_stack_lvl+0x91/0xf0 [ 36.769387] print_report+0xcc/0x620 [ 36.769906] ? __virt_addr_valid+0x102/0x340 [ 36.770492] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.771160] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.771815] kasan_report+0xbe/0xf0 [ 36.772326] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.773001] vma_interval_tree_remove+0xc75/0xec0 [ 36.773652] vma_prepare+0xc54/0x11a0 [ 36.774162] __split_vma+0x5af/0x950 [ 36.774670] ? __pfx___split_vma+0x10/0x10 [ 36.775233] ? find_held_lock+0x2c/0x110 [ 36.775790] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.776395] ? lock_is_held_type+0x9f/0x120 [ 36.776996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.777659] ? mtree_range_walk+0x632/0x900 [ 36.778251] ? mas_walk+0x5c7/0x7c0 [ 36.778770] do_vmi_munmap+0x1f1/0x2b0 [ 36.779299] mmap_region+0x1f9/0x2660 [ 36.779813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.780366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.781137] ? __pfx_lock_acquire+0x10/0x10 [ 36.781710] ? __pfx_mmap_region+0x10/0x10 [ 36.782281] ? security_mmap_addr+0x7d/0xa0 [ 36.782855] ? get_unmapped_area+0x1f5/0x3f0 [ 36.783445] do_mmap+0x854/0xf00 [ 36.783913] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.784446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.785064] ksys_mmap_pgoff+0x3af/0x500 [ 36.785607] do_syscall_64+0x3f/0x90 [ 36.786117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.786820] RIP: 0033:0x7f7dad220d82 [ 36.787308] 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 [ 36.789597] RSP: 002b:00007fff40875538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.790568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dad220d82 [ 36.791477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dac65a000 [ 36.792381] RBP: 00007f7dac65a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.793296] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579007b0f70 [ 36.794208] R13: 00007fff40875550 R14: 00007fff40875580 R15: 00007fff408758e0 [ 36.795135] [ 36.795450] [ 36.795680] Allocated by task 212: [ 36.796140] kasan_save_stack+0x22/0x50 [ 36.796683] kasan_set_track+0x25/0x30 [ 36.797231] __kasan_slab_alloc+0x59/0x70 [ 36.797797] kmem_cache_alloc+0x16b/0x370 [ 36.798344] vm_area_dup+0x20/0x160 [ 36.798826] __split_vma+0x170/0x950 [ 36.799324] split_vma+0xc6/0x110 [ 36.799794] mprotect_fixup+0x8d2/0xb30 [ 36.800331] do_mprotect_pkey+0x87e/0xd40 [ 36.800888] __x64_sys_mprotect+0x78/0xc0 [ 36.801465] do_syscall_64+0x3f/0x90 [ 36.801978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.802674] [ 36.802909] Freed by task 212: [ 36.803334] kasan_save_stack+0x22/0x50 [ 36.803873] kasan_set_track+0x25/0x30 [ 36.804400] kasan_save_free_info+0x2b/0x50 [ 36.804988] __kasan_slab_free+0x10a/0x190 [ 36.805565] kmem_cache_free+0x10d/0x4d0 [ 36.806108] rcu_core+0x8c8/0x2860 [ 36.806585] __do_softirq+0x1b7/0x7d4 [ 36.807103] [ 36.807338] Last potentially related work creation: [ 36.807965] kasan_save_stack+0x22/0x50 [ 36.808502] __kasan_record_aux_stack+0x8e/0xa0 [ 36.809135] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.809822] remove_vma+0x139/0x170 [ 36.810301] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.810903] do_vmi_munmap+0x1f1/0x2b0 [ 36.811422] __vm_munmap+0x138/0x3a0 [ 36.811924] __x64_sys_munmap+0x59/0x80 [ 36.812454] do_syscall_64+0x3f/0x90 [ 36.812970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.813666] [ 36.813905] Second to last potentially related work creation: [ 36.814637] kasan_save_stack+0x22/0x50 [ 36.815182] __kasan_record_aux_stack+0x8e/0xa0 [ 36.815799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.816488] remove_vma+0x139/0x170 [ 36.816990] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.817591] do_vmi_munmap+0x1f1/0x2b0 [ 36.818109] mmap_region+0x1f9/0x2660 [ 36.818619] do_mmap+0x854/0xf00 [ 36.819080] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.819611] ksys_mmap_pgoff+0x3af/0x500 [ 36.820148] do_syscall_64+0x3f/0x90 [ 36.820658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.821353] [ 36.821584] The buggy address belongs to the object at ffff888019dea0e8 [ 36.821584] which belongs to the cache vm_area_struct of size 168 [ 36.823167] The buggy address is located 88 bytes inside of [ 36.823167] freed 168-byte region [ffff888019dea0e8, ffff888019dea190) [ 36.824678] [ 36.824912] The buggy address belongs to the physical page: [ 36.825621] page:00000000fe1c1094 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dea [ 36.826796] memcg:ffff888017e53801 [ 36.827250] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.827953] page_type: 0xffffffff() [ 36.828445] raw: 0100000000000200 ffff8880087a0c80 ffffea00006398c0 dead000000000006 [ 36.829459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e53801 [ 36.830429] page dumped because: kasan: bad access detected [ 36.831140] [ 36.831379] Memory state around the buggy address: [ 36.832006] ffff888019dea000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.832924] ffff888019dea080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.833846] >ffff888019dea100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.834759] ^ [ 36.835442] ffff888019dea180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 36.836364] ffff888019dea200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.837297] ================================================================== [ 36.838364] Disabling lock debugging due to kernel taint [ 39.503438] BUG: Bad rss-counter state mm:000000008fb4d1a5 type:MM_FILEPAGES val:33 [ 39.504596] BUG: Bad rss-counter state mm:000000008fb4d1a5 type:MM_ANONPAGES val:22 [ 39.916505] BUG: Bad rss-counter state mm:000000005a9b23cb type:MM_FILEPAGES val:33 [ 39.917568] BUG: Bad rss-counter state mm:000000005a9b23cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48560' (ECDSA) to the list of known hosts. 2023/06/21 05:06:39 fuzzer started 2023/06/21 05:06:40 dialing manager at localhost:36067 2023/06/21 05:06:40 checking machine... 2023/06/21 05:06:40 checking revisions... [ 40.647837] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:06:40 testing simple program... [ 40.703900] cgroup: Unknown subsys name 'net' [ 40.755447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:06:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028d5f38 RCX=0000000000000000 RDX=1ffff11002cb14c1 RSI=ffffffff81b3d918 RDI=ffff88801658a608 RBP=ffff88801658a068 RSP=ffff8880146af990 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffff88801b9ec318 R13=ffff8880146afa00 R14=0000000000000000 R15=ffff888010012000 RIP=ffffffff81b3d934 RFL=00000212 [----A--] 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 00007fdab4e3a900 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=00007fdab4359000 CR3=000000000ca94000 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=000000000011a310b3285ca56c489dff XMM01=000000000011a528d59e07bde36eea69 XMM02=000000000011a650ec2efd57dc4c00df XMM03=00000000001217a853747902765b0776 XMM04=354d71318d89054600000000000ae988 XMM05=dfcdbad4f1609c3700000000001326a0 XMM06=37260762a0b7ed8e0000000000131878 XMM07=e042d86d42eb936e0000000000121a28 XMM08=53747902765b0776000000000011a6b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bcbc28 RBX=ffffffff85e5e144 RCX=ffffffff81ef1137 RDX=0000000000000000 RSI=ffffffff861c902a RDI=ffffffff85e5e130 RBP=ffffffff85e5e130 RSP=ffff88800fe6f820 R8 =ffffffff861c902a R9 =ffff88800fe6f918 R10=0000000000038001 R11=0000000000038ddb R12=ffffffff85e5e15c R13=ffffffff85e5e130 R14=ffffffff85e5e130 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f6e88998900 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=00007ffe0d495000 CR3=000000000e67c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000