syzkaller login: [ 44.024591] BUG: Bad rss-counter state mm:0000000056aae06c type:MM_FILEPAGES val:33 [ 44.025877] BUG: Bad rss-counter state mm:0000000056aae06c type:MM_ANONPAGES val:22 [ 44.120751] ================================================================== [ 44.121871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.123121] Read of size 8 at addr ffff8880097efc20 by task sshd/219 [ 44.123840] [ 44.124006] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.124671] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.125441] Call Trace: [ 44.125695] [ 44.125915] dump_stack_lvl+0x91/0xf0 [ 44.126295] print_report+0xcc/0x620 [ 44.126664] ? __virt_addr_valid+0x102/0x340 [ 44.127087] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.127578] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.128059] kasan_report+0xbe/0xf0 [ 44.128439] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.128935] vma_interval_tree_remove+0xc75/0xec0 [ 44.129399] vma_prepare+0xc54/0x11a0 [ 44.129772] __split_vma+0x5af/0x950 [ 44.130134] ? __pfx___split_vma+0x10/0x10 [ 44.130541] ? find_held_lock+0x2c/0x110 [ 44.130947] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.131404] ? lock_is_held_type+0x9f/0x120 [ 44.131751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.132109] ? mtree_range_walk+0x632/0x900 [ 44.132446] ? mas_walk+0x5c7/0x7c0 [ 44.132727] do_vmi_munmap+0x1f1/0x2b0 [ 44.133023] mmap_region+0x1f9/0x2660 [ 44.133309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.133612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.134007] ? __pfx_lock_acquire+0x10/0x10 [ 44.134303] ? __pfx_mmap_region+0x10/0x10 [ 44.134611] ? security_mmap_addr+0x7d/0xa0 [ 44.134906] ? get_unmapped_area+0x1f5/0x3f0 [ 44.135210] do_mmap+0x854/0xf00 [ 44.135459] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.135735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.136043] ksys_mmap_pgoff+0x3af/0x500 [ 44.136325] do_syscall_64+0x3f/0x90 [ 44.136591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.136953] RIP: 0033:0x7f550c6f4d82 [ 44.137206] 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 [ 44.138397] RSP: 002b:00007ffd64fac0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.138898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f550c6f4d82 [ 44.139377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f550bb2e000 [ 44.139844] RBP: 00007f550bb2e000 R08: 0000000000000009 R09: 0000000000001000 [ 44.140318] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ed8e11ec0 [ 44.140795] R13: 00007ffd64fac0d0 R14: 00007ffd64fac100 R15: 00007ffd64fac460 [ 44.141269] [ 44.141432] [ 44.141554] Allocated by task 212: [ 44.141788] kasan_save_stack+0x22/0x50 [ 44.142064] kasan_set_track+0x25/0x30 [ 44.142337] __kasan_slab_alloc+0x59/0x70 [ 44.142623] kmem_cache_alloc+0x16b/0x370 [ 44.142906] vm_area_dup+0x20/0x160 [ 44.143157] __split_vma+0x170/0x950 [ 44.143427] split_vma+0xc6/0x110 [ 44.143669] mprotect_fixup+0x8d2/0xb30 [ 44.143943] do_mprotect_pkey+0x87e/0xd40 [ 44.144229] __x64_sys_mprotect+0x78/0xc0 [ 44.144520] do_syscall_64+0x3f/0x90 [ 44.144780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.145137] [ 44.145257] Freed by task 212: [ 44.145476] kasan_save_stack+0x22/0x50 [ 44.145751] kasan_set_track+0x25/0x30 [ 44.146027] kasan_save_free_info+0x2b/0x50 [ 44.146321] __kasan_slab_free+0x10a/0x190 [ 44.146614] kmem_cache_free+0x10d/0x4d0 [ 44.146893] rcu_core+0x8c8/0x2860 [ 44.147136] __do_softirq+0x1b7/0x7d4 [ 44.147406] [ 44.147525] Last potentially related work creation: [ 44.147852] kasan_save_stack+0x22/0x50 [ 44.148127] __kasan_record_aux_stack+0x8e/0xa0 [ 44.148442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.148793] remove_vma+0x139/0x170 [ 44.149040] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.149349] do_vmi_munmap+0x1f1/0x2b0 [ 44.149617] __vm_munmap+0x138/0x3a0 [ 44.149879] __x64_sys_munmap+0x59/0x80 [ 44.150152] do_syscall_64+0x3f/0x90 [ 44.150410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.150765] [ 44.150883] The buggy address belongs to the object at ffff8880097efbc8 [ 44.150883] which belongs to the cache vm_area_struct of size 168 [ 44.151697] The buggy address is located 88 bytes inside of [ 44.151697] freed 168-byte region [ffff8880097efbc8, ffff8880097efc70) [ 44.152471] [ 44.152594] The buggy address belongs to the physical page: [ 44.152963] page:000000000867319e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97ef [ 44.153562] memcg:ffff88800e524101 [ 44.153796] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.154154] page_type: 0xffffffff() [ 44.154404] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.154911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e524101 [ 44.155421] page dumped because: kasan: bad access detected [ 44.155784] [ 44.155901] Memory state around the buggy address: [ 44.156219] ffff8880097efb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.156698] ffff8880097efb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.157172] >ffff8880097efc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.157641] ^ [ 44.157930] ffff8880097efc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.158400] ffff8880097efd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.158869] ================================================================== [ 44.159409] Disabling lock debugging due to kernel taint [ 46.291413] BUG: Bad rss-counter state mm:00000000786de641 type:MM_FILEPAGES val:33 [ 46.293086] BUG: Bad rss-counter state mm:00000000786de641 type:MM_ANONPAGES val:22 [ 46.744199] BUG: Bad rss-counter state mm:0000000065317800 type:MM_FILEPAGES val:33 [ 46.745836] BUG: Bad rss-counter state mm:0000000065317800 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43572' (ECDSA) to the list of known hosts. 2023/06/19 20:20:24 fuzzer started 2023/06/19 20:20:25 dialing manager at localhost:44161 2023/06/19 20:20:25 checking machine... 2023/06/19 20:20:25 checking revisions... [ 47.468626] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:20:25 testing simple program... [ 47.509536] cgroup: Unknown subsys name 'net' [ 47.559995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:20:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000181 RCX=0000000000000000 RDX=1ffffffff0fe7fee RSI=ffffffff81ef7a9a RDI=ffffffff87f3ff70 RBP=0000000000000001 RSP=ffff88800971f710 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00000000000000d0 R13=000000000000000d R14=0000000000000054 R15=ffff88800971f7c0 RIP=ffffffff81ef7ad9 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 00007f76bcd03900 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=00007f76bc223020 CR3=000000000d5b0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=2f1d2468216836b800000000000ae988 XMM05=b53057c9dcf940e70000000000134ed0 XMM06=806171799158d9670000000000133f70 XMM07=fb795ef6d657705600000000001244f8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801c9e0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801c9dfb01 RSI=ffff88801c9dfb18 RDI=ffff88801c9df398 RBP=ffff88801c9df3e0 RSP=ffff88801c9df318 R8 =ffffffff863dc5fa R9 =ffff88801c9df3c8 R10=0000000000038001 R11=0000000000091b07 R12=ffff88801c9df3e8 R13=ffff88801c9df3d0 R14=ffff88801c9dfb20 R15=ffff88801c9df388 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007fdfc97fb900 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=00007fdfc9db2618 CR3=0000000019612000 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=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