syzkaller login: [ 38.860834] BUG: Bad rss-counter state mm:00000000ccd7a8a4 type:MM_FILEPAGES val:33 [ 38.862044] BUG: Bad rss-counter state mm:00000000ccd7a8a4 type:MM_ANONPAGES val:22 [ 38.900013] ================================================================== [ 38.901013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.901969] Read of size 8 at addr ffff888016740b38 by task sshd/220 [ 38.902833] [ 38.903052] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.903954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904908] Call Trace: [ 38.905210] [ 38.905481] dump_stack_lvl+0x91/0xf0 [ 38.905947] print_report+0xcc/0x620 [ 38.906409] ? __virt_addr_valid+0x102/0x340 [ 38.906932] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907516] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908109] kasan_report+0xbe/0xf0 [ 38.908560] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909151] vma_interval_tree_remove+0xc75/0xec0 [ 38.909723] vma_prepare+0xc54/0x11a0 [ 38.910178] __split_vma+0x5af/0x950 [ 38.910623] ? __pfx___split_vma+0x10/0x10 [ 38.911133] ? find_held_lock+0x2c/0x110 [ 38.911657] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.912228] ? lock_is_held_type+0x9f/0x120 [ 38.912788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.913412] ? mtree_range_walk+0x632/0x900 [ 38.913971] ? mas_walk+0x5c7/0x7c0 [ 38.914448] do_vmi_munmap+0x1f1/0x2b0 [ 38.914945] mmap_region+0x1f9/0x2660 [ 38.915428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.915965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.916683] ? __pfx_lock_acquire+0x10/0x10 [ 38.917220] ? __pfx_mmap_region+0x10/0x10 [ 38.917754] ? security_mmap_addr+0x7d/0xa0 [ 38.918289] ? get_unmapped_area+0x1f5/0x3f0 [ 38.918841] do_mmap+0x854/0xf00 [ 38.919282] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.919780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.920356] ksys_mmap_pgoff+0x3af/0x500 [ 38.920873] do_syscall_64+0x3f/0x90 [ 38.921354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922102] RIP: 0033:0x7f8a33d84d82 [ 38.922574] 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 [ 38.924900] RSP: 002b:00007fffd1bba0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.925817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a33d84d82 [ 38.926671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a331be000 [ 38.927541] RBP: 00007f8a331be000 R08: 0000000000000009 R09: 0000000000001000 [ 38.928404] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603ad725ec0 [ 38.929307] R13: 00007fffd1bba0e0 R14: 00007fffd1bba110 R15: 00007fffd1bba470 [ 38.930320] [ 38.930621] [ 38.930837] Allocated by task 213: [ 38.931273] kasan_save_stack+0x22/0x50 [ 38.931785] kasan_set_track+0x25/0x30 [ 38.932293] __kasan_slab_alloc+0x59/0x70 [ 38.932838] kmem_cache_alloc+0x16b/0x370 [ 38.933363] vm_area_dup+0x20/0x160 [ 38.933834] __split_vma+0x170/0x950 [ 38.934311] split_vma+0xc6/0x110 [ 38.934763] mprotect_fixup+0x8d2/0xb30 [ 38.935274] do_mprotect_pkey+0x87e/0xd40 [ 38.935797] __x64_sys_mprotect+0x78/0xc0 [ 38.936344] do_syscall_64+0x3f/0x90 [ 38.936831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937483] [ 38.937699] Freed by task 213: [ 38.938089] kasan_save_stack+0x22/0x50 [ 38.938596] kasan_set_track+0x25/0x30 [ 38.939089] kasan_save_free_info+0x2b/0x50 [ 38.939635] __kasan_slab_free+0x10a/0x190 [ 38.940180] kmem_cache_free+0x10d/0x4d0 [ 38.940697] rcu_core+0x8c8/0x2860 [ 38.941155] __do_softirq+0x1b7/0x7d4 [ 38.941641] [ 38.941857] Last potentially related work creation: [ 38.942447] kasan_save_stack+0x22/0x50 [ 38.942950] __kasan_record_aux_stack+0x8e/0xa0 [ 38.943521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.944175] remove_vma+0x139/0x170 [ 38.944630] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.945197] do_vmi_munmap+0x1f1/0x2b0 [ 38.945685] __vm_munmap+0x138/0x3a0 [ 38.946158] __x64_sys_munmap+0x59/0x80 [ 38.946663] do_syscall_64+0x3f/0x90 [ 38.947148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947809] [ 38.948056] Second to last potentially related work creation: [ 38.948744] kasan_save_stack+0x22/0x50 [ 38.949261] __kasan_record_aux_stack+0x8e/0xa0 [ 38.949840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.950491] remove_vma+0x139/0x170 [ 38.950950] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.951513] do_vmi_munmap+0x1f1/0x2b0 [ 38.952020] mmap_region+0x1f9/0x2660 [ 38.952499] do_mmap+0x854/0xf00 [ 38.952930] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.953425] ksys_mmap_pgoff+0x3af/0x500 [ 38.953940] do_syscall_64+0x3f/0x90 [ 38.954413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955059] [ 38.955278] The buggy address belongs to the object at ffff888016740ae0 [ 38.955278] which belongs to the cache vm_area_struct of size 168 [ 38.956775] The buggy address is located 88 bytes inside of [ 38.956775] freed 168-byte region [ffff888016740ae0, ffff888016740b88) [ 38.958188] [ 38.958406] The buggy address belongs to the physical page: [ 38.959063] page:0000000045a7328a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16740 [ 38.960182] memcg:ffff88800ea44b01 [ 38.960612] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.961310] page_type: 0xffffffff() [ 38.961762] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.962681] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea44b01 [ 38.963594] page dumped because: kasan: bad access detected [ 38.964261] [ 38.964480] Memory state around the buggy address: [ 38.965056] ffff888016740a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.965914] ffff888016740a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.966783] >ffff888016740b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.967661] ^ [ 38.968299] ffff888016740b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.969169] ffff888016740c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.970029] ================================================================== [ 38.971129] Disabling lock debugging due to kernel taint [ 40.915952] BUG: Bad rss-counter state mm:0000000032dc6c3e type:MM_FILEPAGES val:33 [ 40.917044] BUG: Bad rss-counter state mm:0000000032dc6c3e type:MM_ANONPAGES val:22 [ 41.419697] BUG: Bad rss-counter state mm:00000000fc5fc38c type:MM_FILEPAGES val:33 [ 41.420781] BUG: Bad rss-counter state mm:00000000fc5fc38c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42322' (ECDSA) to the list of known hosts. 2023/06/20 12:20:53 fuzzer started 2023/06/20 12:20:53 dialing manager at localhost:36067 2023/06/20 12:20:53 checking machine... 2023/06/20 12:20:53 checking revisions... [ 42.184911] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:20:54 testing simple program... [ 42.224895] cgroup: Unknown subsys name 'net' [ 42.274811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:20:53 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff816516b1 RSP=ffff888008d7f058 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000009293 R12=1ffff110011afe17 R13=0000000000001700 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff812d1358 RFL=00000006 [-----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 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=00007ffcd28faa58 CR3=0000000017da0000 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=01015f000100000000000000fd000000 XMM02=0000000000000000000000000000005f XMM03=00000000000001095000010000000000 XMM04=00b50100000200000000000000000000 XMM05=d100000000000000b501000000000000 XMM06=0000000000fd00000000000000f35600 XMM07=67000000000000000000000000000000 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888017c70000 RBX=ffff888017c77488 RCX=0000000000000001 RDX=ffff888017c78000 RSI=ffff888017c77488 RDI=ffff888017c77400 RBP=dffffc0000000000 RSP=ffff888017c773a0 R8 =0000000000000001 R9 =ffff888017c77430 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1002f8ee80 R13=ffffed1002f8ee7f R14=ffff888017c77438 R15=ffff888017c773f0 RIP=ffffffff81132fc3 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 00007f7e92071900 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=00007f7e92628618 CR3=0000000017da0000 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