syzkaller login: [ 33.587300] BUG: Bad rss-counter state mm:00000000ee3c84dd type:MM_FILEPAGES val:33 [ 33.588749] BUG: Bad rss-counter state mm:00000000ee3c84dd type:MM_ANONPAGES val:22 [ 33.712635] ================================================================== [ 33.713728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.714835] Read of size 8 at addr ffff88800ef634e0 by task sshd/219 [ 33.715880] [ 33.716142] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.717161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.718358] Call Trace: [ 33.718740] [ 33.719079] dump_stack_lvl+0x91/0xf0 [ 33.719661] print_report+0xcc/0x620 [ 33.720238] ? __virt_addr_valid+0x102/0x340 [ 33.720897] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.721655] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.722389] kasan_report+0xbe/0xf0 [ 33.722806] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.723334] vma_interval_tree_remove+0xc75/0xec0 [ 33.723842] vma_prepare+0xc54/0x11a0 [ 33.724247] __split_vma+0x5af/0x950 [ 33.724647] ? __pfx___split_vma+0x10/0x10 [ 33.725088] ? find_held_lock+0x2c/0x110 [ 33.725535] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.726012] ? lock_is_held_type+0x9f/0x120 [ 33.726475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.726983] ? mtree_range_walk+0x632/0x900 [ 33.727452] ? mas_walk+0x5c7/0x7c0 [ 33.727850] do_vmi_munmap+0x1f1/0x2b0 [ 33.728265] mmap_region+0x1f9/0x2660 [ 33.728675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.729109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.729715] ? __pfx_lock_acquire+0x10/0x10 [ 33.730167] ? __pfx_mmap_region+0x10/0x10 [ 33.730616] ? security_mmap_addr+0x7d/0xa0 [ 33.731062] ? get_unmapped_area+0x1f5/0x3f0 [ 33.731527] do_mmap+0x854/0xf00 [ 33.731904] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.732322] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.732797] ksys_mmap_pgoff+0x3af/0x500 [ 33.733223] do_syscall_64+0x3f/0x90 [ 33.733641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.734183] RIP: 0033:0x7ff552bf7d82 [ 33.734571] 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 [ 33.736368] RSP: 002b:00007fff9f3d25e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.737133] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff552bf7d82 [ 33.737861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff552031000 [ 33.738569] RBP: 00007ff552031000 R08: 0000000000000009 R09: 0000000000001000 [ 33.739283] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646d5669f70 [ 33.739997] R13: 00007fff9f3d2600 R14: 00007fff9f3d2630 R15: 00007fff9f3d2990 [ 33.740726] [ 33.740973] [ 33.741156] Allocated by task 212: [ 33.741530] kasan_save_stack+0x22/0x50 [ 33.741957] kasan_set_track+0x25/0x30 [ 33.742372] __kasan_slab_alloc+0x59/0x70 [ 33.742812] kmem_cache_alloc+0x16b/0x370 [ 33.743246] vm_area_dup+0x20/0x160 [ 33.743628] __split_vma+0x170/0x950 [ 33.744022] split_vma+0xc6/0x110 [ 33.744393] mprotect_fixup+0x8d2/0xb30 [ 33.744820] do_mprotect_pkey+0x87e/0xd40 [ 33.745259] __x64_sys_mprotect+0x78/0xc0 [ 33.745713] do_syscall_64+0x3f/0x90 [ 33.746114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.746661] [ 33.746851] Freed by task 212: [ 33.747183] kasan_save_stack+0x22/0x50 [ 33.747612] kasan_set_track+0x25/0x30 [ 33.748024] kasan_save_free_info+0x2b/0x50 [ 33.748470] __kasan_slab_free+0x10a/0x190 [ 33.748922] kmem_cache_free+0x10d/0x4d0 [ 33.749351] rcu_core+0x8c8/0x2860 [ 33.749735] __do_softirq+0x1b7/0x7d4 [ 33.750141] [ 33.750323] Last potentially related work creation: [ 33.750826] kasan_save_stack+0x22/0x50 [ 33.751248] __kasan_record_aux_stack+0x8e/0xa0 [ 33.751742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.752280] remove_vma+0x139/0x170 [ 33.752661] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.753136] do_vmi_munmap+0x1f1/0x2b0 [ 33.753559] __vm_munmap+0x138/0x3a0 [ 33.753952] __x64_sys_munmap+0x59/0x80 [ 33.754373] do_syscall_64+0x3f/0x90 [ 33.754775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.755312] [ 33.755500] The buggy address belongs to the object at ffff88800ef63488 [ 33.755500] which belongs to the cache vm_area_struct of size 168 [ 33.756812] The buggy address is located 88 bytes inside of [ 33.756812] freed 168-byte region [ffff88800ef63488, ffff88800ef63530) [ 33.757991] [ 33.758178] The buggy address belongs to the physical page: [ 33.758732] page:00000000ecd176a4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef63 [ 33.759656] memcg:ffff88800ef64001 [ 33.760022] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.760565] page_type: 0xffffffff() [ 33.760949] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.761726] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef64001 [ 33.762484] page dumped because: kasan: bad access detected [ 33.763037] [ 33.763245] Memory state around the buggy address: [ 33.763760] ffff88800ef63380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.764476] ffff88800ef63400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.765240] >ffff88800ef63480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.766003] ^ [ 33.766646] ffff88800ef63500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.767365] ffff88800ef63580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.768092] ================================================================== [ 33.768895] Disabling lock debugging due to kernel taint [ 36.398804] BUG: Bad rss-counter state mm:00000000e2519cfb type:MM_FILEPAGES val:33 [ 36.399558] BUG: Bad rss-counter state mm:00000000e2519cfb type:MM_ANONPAGES val:22 [ 36.955116] BUG: Bad rss-counter state mm:000000006921d192 type:MM_FILEPAGES val:33 [ 36.956263] BUG: Bad rss-counter state mm:000000006921d192 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48655' (ECDSA) to the list of known hosts. 2023/06/20 05:05:19 fuzzer started 2023/06/20 05:05:19 dialing manager at localhost:44161 2023/06/20 05:05:19 checking machine... 2023/06/20 05:05:19 checking revisions... [ 37.652450] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:05:19 testing simple program... [ 37.701902] cgroup: Unknown subsys name 'net' [ 37.739731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:16 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81839c37 RSP=ffff88801ba77c08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=0000000000000288 R15=ffffea0000360e80 RIP=ffffffff8153437e RFL=00000047 [---Z-PC] 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 00007f7472542900 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=00007f7472af9618 CR3=000000000c982000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f1355111b40 CR3=000000000cb9c000 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=be32ea1d60b79a99d04df53bd9548f2a XMM02=ec2efd57dc4c00df000000000011c828 XMM03=319162b10abe3848000000000011c8f8 XMM04=c7d79ef2af40d64500000000000ae988 XMM05=d9d26cb306c197cc0000000000134c08 XMM06=806171799158d9670000000000133ca8 XMM07=e042d86d42eb936e0000000000124498 XMM08=319162b10abe3848000000000011c8f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000