syzkaller login: [ 42.701949] BUG: Bad rss-counter state mm:00000000250147cd type:MM_FILEPAGES val:33 [ 42.703008] BUG: Bad rss-counter state mm:00000000250147cd type:MM_ANONPAGES val:22 [ 42.740950] ================================================================== [ 42.742028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.743082] Read of size 8 at addr ffff88800e284b38 by task sshd/220 [ 42.743928] [ 42.744198] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.745094] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.746191] Call Trace: [ 42.746541] [ 42.746867] dump_stack_lvl+0x91/0xf0 [ 42.747387] print_report+0xcc/0x620 [ 42.747911] ? __virt_addr_valid+0x102/0x340 [ 42.748533] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.749205] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.749917] kasan_report+0xbe/0xf0 [ 42.750453] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.751153] vma_interval_tree_remove+0xc75/0xec0 [ 42.751752] vma_prepare+0xc54/0x11a0 [ 42.752294] __split_vma+0x5af/0x950 [ 42.752799] ? __pfx___split_vma+0x10/0x10 [ 42.753328] ? find_held_lock+0x2c/0x110 [ 42.753854] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.754412] ? lock_is_held_type+0x9f/0x120 [ 42.754961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.755559] ? mtree_range_walk+0x632/0x900 [ 42.756111] ? mas_walk+0x5c7/0x7c0 [ 42.756580] do_vmi_munmap+0x1f1/0x2b0 [ 42.757069] mmap_region+0x1f9/0x2660 [ 42.757552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.758061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.758769] ? __pfx_lock_acquire+0x10/0x10 [ 42.759296] ? __pfx_mmap_region+0x10/0x10 [ 42.759830] ? security_mmap_addr+0x7d/0xa0 [ 42.760366] ? get_unmapped_area+0x1f5/0x3f0 [ 42.760920] do_mmap+0x854/0xf00 [ 42.761356] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.761877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.762448] ksys_mmap_pgoff+0x3af/0x500 [ 42.762955] do_syscall_64+0x3f/0x90 [ 42.763427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.764081] RIP: 0033:0x7f4d7f5f6d82 [ 42.764537] 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 [ 42.766684] RSP: 002b:00007ffc637d4b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.767591] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d7f5f6d82 [ 42.768446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d7ea30000 [ 42.769298] RBP: 00007f4d7ea30000 R08: 0000000000000009 R09: 0000000000001000 [ 42.770137] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c199972d90 [ 42.770975] R13: 00007ffc637d4b70 R14: 00007ffc637d4ba0 R15: 00007ffc637d4f00 [ 42.771831] [ 42.772119] [ 42.772332] Allocated by task 213: [ 42.772758] kasan_save_stack+0x22/0x50 [ 42.773260] kasan_set_track+0x25/0x30 [ 42.773770] __kasan_slab_alloc+0x59/0x70 [ 42.774290] kmem_cache_alloc+0x16b/0x370 [ 42.774807] vm_area_dup+0x20/0x160 [ 42.775259] __split_vma+0x170/0x950 [ 42.775724] split_vma+0xc6/0x110 [ 42.776164] mprotect_fixup+0x8d2/0xb30 [ 42.776664] do_mprotect_pkey+0x87e/0xd40 [ 42.777196] __x64_sys_mprotect+0x78/0xc0 [ 42.777737] do_syscall_64+0x3f/0x90 [ 42.778213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.778864] [ 42.779084] Freed by task 213: [ 42.779474] kasan_save_stack+0x22/0x50 [ 42.779979] kasan_set_track+0x25/0x30 [ 42.780467] kasan_save_free_info+0x2b/0x50 [ 42.780992] __kasan_slab_free+0x10a/0x190 [ 42.781529] kmem_cache_free+0x10d/0x4d0 [ 42.782040] rcu_core+0x8c8/0x2860 [ 42.782485] __do_softirq+0x1b7/0x7d4 [ 42.782957] [ 42.783174] Last potentially related work creation: [ 42.783757] kasan_save_stack+0x22/0x50 [ 42.784263] __kasan_record_aux_stack+0x8e/0xa0 [ 42.784832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.785486] remove_vma+0x139/0x170 [ 42.785939] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.786566] do_vmi_munmap+0x1f1/0x2b0 [ 42.787059] __vm_munmap+0x138/0x3a0 [ 42.787535] __x64_sys_munmap+0x59/0x80 [ 42.788028] do_syscall_64+0x3f/0x90 [ 42.788498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.789135] [ 42.789348] Second to last potentially related work creation: [ 42.790046] kasan_save_stack+0x22/0x50 [ 42.790550] __kasan_record_aux_stack+0x8e/0xa0 [ 42.791121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.791762] remove_vma+0x139/0x170 [ 42.792211] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.792768] do_vmi_munmap+0x1f1/0x2b0 [ 42.793256] mmap_region+0x1f9/0x2660 [ 42.793753] do_mmap+0x854/0xf00 [ 42.794183] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.794675] ksys_mmap_pgoff+0x3af/0x500 [ 42.795176] do_syscall_64+0x3f/0x90 [ 42.795642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.796292] [ 42.796505] The buggy address belongs to the object at ffff88800e284ae0 [ 42.796505] which belongs to the cache vm_area_struct of size 168 [ 42.797982] The buggy address is located 88 bytes inside of [ 42.797982] freed 168-byte region [ffff88800e284ae0, ffff88800e284b88) [ 42.799375] [ 42.799588] The buggy address belongs to the physical page: [ 42.800246] page:00000000dbcd63ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe284 [ 42.801316] memcg:ffff88800e327001 [ 42.801753] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.802393] page_type: 0xffffffff() [ 42.802848] raw: 0100000000000200 ffff88800879fc80 ffffea0000324400 dead000000000002 [ 42.803763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e327001 [ 42.804660] page dumped because: kasan: bad access detected [ 42.805314] [ 42.805537] Memory state around the buggy address: [ 42.806116] ffff88800e284a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.806968] ffff88800e284a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 42.807820] >ffff88800e284b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.808667] ^ [ 42.809301] ffff88800e284b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 42.810195] ffff88800e284c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 42.811081] ================================================================== [ 42.812119] Disabling lock debugging due to kernel taint [ 45.085851] BUG: Bad rss-counter state mm:00000000dc912629 type:MM_FILEPAGES val:33 [ 45.086787] BUG: Bad rss-counter state mm:00000000dc912629 type:MM_ANONPAGES val:22 [ 45.573963] BUG: Bad rss-counter state mm:0000000068ccdc1a type:MM_FILEPAGES val:33 [ 45.575150] BUG: Bad rss-counter state mm:0000000068ccdc1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37011' (ECDSA) to the list of known hosts. 2023/06/20 08:37:54 fuzzer started 2023/06/20 08:37:55 dialing manager at localhost:44161 2023/06/20 08:37:55 checking machine... 2023/06/20 08:37:55 checking revisions... [ 46.301855] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:37:55 testing simple program... [ 46.347235] cgroup: Unknown subsys name 'net' [ 46.386630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:37:51 Registers: info registers vcpu 0 RAX=1ffff11001ca7544 RBX=ffff88800e53a9e8 RCX=ffffffff84530871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e53aa20 RBP=ffff888015f0b8f8 RSP=ffff88800cf07c98 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888015f0c468 R14=ffffffff818c75ae R15=ffff888010138400 RIP=ffffffff81846381 RFL=00000046 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7e500bb900 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=00007ffcfeb80748 CR3=000000001018a000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002023ec0 RSI=ffffffff836382d7 RDI=ffff88801011f5a8 RBP=ffff88801011f600 RSP=ffff88801011f538 R8 =0000000000000001 R9 =ffff88801011f5e8 R10=0000000000038001 R11=000000000009a9c8 R12=ffff88801011f670 R13=0000000000000000 R14=ffff888006881b40 R15=ffff88801011f5a8 RIP=ffffffff8113062c 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f972fbb4900 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=00007f972efd3a90 CR3=000000000da70000 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=3745262898004aa1ea42c0a2f7230107 XMM02=eff9b2d0a8fce9cb000000000011daf0 XMM03=2c67c8bc2e329bc3000000000011dc38 XMM04=cf2f275eabfadee900000000000ae988 XMM05=aac2e5e59a111ca90000000000136688 XMM06=4fda316b135da52b0000000000135108 XMM07=fb795ef6d657705600000000001245f8 XMM08=2c67c8bc2e329bc3000000000011dc38 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000