syzkaller login: [ 35.222664] BUG: Bad rss-counter state mm:0000000022c58687 type:MM_FILEPAGES val:33 [ 35.223860] BUG: Bad rss-counter state mm:0000000022c58687 type:MM_ANONPAGES val:22 [ 35.263081] ================================================================== [ 35.263983] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.264932] Read of size 8 at addr ffff888009657d08 by task sshd/219 [ 35.265860] [ 35.266078] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.266938] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.267927] Call Trace: [ 35.268248] [ 35.268535] dump_stack_lvl+0x91/0xf0 [ 35.269028] print_report+0xcc/0x620 [ 35.269539] ? __virt_addr_valid+0x102/0x340 [ 35.270088] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.270711] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.271324] kasan_report+0xbe/0xf0 [ 35.271796] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.272422] vma_interval_tree_remove+0xc75/0xec0 [ 35.273061] vma_prepare+0xc54/0x11a0 [ 35.273575] __split_vma+0x5af/0x950 [ 35.274068] ? __pfx___split_vma+0x10/0x10 [ 35.274635] ? find_held_lock+0x2c/0x110 [ 35.275177] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.275771] ? lock_is_held_type+0x9f/0x120 [ 35.276337] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.276975] ? mtree_range_walk+0x632/0x900 [ 35.277564] ? mas_walk+0x5c7/0x7c0 [ 35.278068] do_vmi_munmap+0x1f1/0x2b0 [ 35.278594] mmap_region+0x1f9/0x2660 [ 35.279100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.279635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.280390] ? __pfx_lock_acquire+0x10/0x10 [ 35.280954] ? __pfx_mmap_region+0x10/0x10 [ 35.281539] ? security_mmap_addr+0x7d/0xa0 [ 35.282103] ? get_unmapped_area+0x1f5/0x3f0 [ 35.282689] do_mmap+0x854/0xf00 [ 35.283155] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.283685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.284280] ksys_mmap_pgoff+0x3af/0x500 [ 35.284815] do_syscall_64+0x3f/0x90 [ 35.285327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.286014] RIP: 0033:0x7f64ab111d82 [ 35.286503] 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 [ 35.288760] RSP: 002b:00007ffc7a117728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.289739] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64ab111d82 [ 35.290640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64aa54b000 [ 35.291533] RBP: 00007f64aa54b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.292436] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a6ad12980 [ 35.293334] R13: 00007ffc7a117740 R14: 00007ffc7a117770 R15: 00007ffc7a117ad0 [ 35.294237] [ 35.294548] [ 35.294775] Allocated by task 212: [ 35.295226] kasan_save_stack+0x22/0x50 [ 35.295748] kasan_set_track+0x25/0x30 [ 35.296271] __kasan_slab_alloc+0x59/0x70 [ 35.296817] kmem_cache_alloc+0x16b/0x370 [ 35.297376] vm_area_dup+0x20/0x160 [ 35.297856] __split_vma+0x170/0x950 [ 35.298351] split_vma+0xc6/0x110 [ 35.298809] mprotect_fixup+0x8d2/0xb30 [ 35.299335] do_mprotect_pkey+0x87e/0xd40 [ 35.299881] __x64_sys_mprotect+0x78/0xc0 [ 35.300430] do_syscall_64+0x3f/0x90 [ 35.300928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.301618] [ 35.301839] Freed by task 212: [ 35.302256] kasan_save_stack+0x22/0x50 [ 35.302793] kasan_set_track+0x25/0x30 [ 35.303319] kasan_save_free_info+0x2b/0x50 [ 35.303887] __kasan_slab_free+0x10a/0x190 [ 35.304450] kmem_cache_free+0x10d/0x4d0 [ 35.304984] rcu_core+0x8c8/0x2860 [ 35.305643] __do_softirq+0x1b7/0x7d4 [ 35.306280] [ 35.306553] Last potentially related work creation: [ 35.307319] kasan_save_stack+0x22/0x50 [ 35.307974] __kasan_record_aux_stack+0x8e/0xa0 [ 35.308711] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.309573] remove_vma+0x139/0x170 [ 35.310168] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.310884] do_vmi_munmap+0x1f1/0x2b0 [ 35.311520] __vm_munmap+0x138/0x3a0 [ 35.312130] __x64_sys_munmap+0x59/0x80 [ 35.312772] do_syscall_64+0x3f/0x90 [ 35.313409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.314244] [ 35.314532] The buggy address belongs to the object at ffff888009657cb0 [ 35.314532] which belongs to the cache vm_area_struct of size 168 [ 35.316485] The buggy address is located 88 bytes inside of [ 35.316485] freed 168-byte region [ffff888009657cb0, ffff888009657d58) [ 35.318223] [ 35.318450] The buggy address belongs to the physical page: [ 35.319135] page:000000007a9818be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9657 [ 35.320268] memcg:ffff88800e02f401 [ 35.320725] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.321476] page_type: 0xffffffff() [ 35.321952] raw: 0100000000000200 ffff8880087a0c80 ffffea000040c340 dead000000000005 [ 35.322926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e02f401 [ 35.323882] page dumped because: kasan: bad access detected [ 35.324575] [ 35.324795] Memory state around the buggy address: [ 35.325430] ffff888009657c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.326342] ffff888009657c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.327235] >ffff888009657d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.328134] ^ [ 35.328598] ffff888009657d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.329515] ffff888009657e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.330414] ================================================================== [ 35.331596] Disabling lock debugging due to kernel taint [ 37.285319] BUG: Bad rss-counter state mm:000000003a82793f type:MM_FILEPAGES val:33 [ 37.286336] BUG: Bad rss-counter state mm:000000003a82793f type:MM_ANONPAGES val:22 [ 37.757484] BUG: Bad rss-counter state mm:00000000fecf4d18 type:MM_FILEPAGES val:33 [ 37.758268] BUG: Bad rss-counter state mm:00000000fecf4d18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22666' (ECDSA) to the list of known hosts. 2023/06/20 13:12:56 fuzzer started 2023/06/20 13:12:57 dialing manager at localhost:36067 2023/06/20 13:12:57 checking machine... 2023/06/20 13:12:57 checking revisions... [ 38.460772] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:12:57 testing simple program... [ 38.504593] cgroup: Unknown subsys name 'net' [ 38.541068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:12:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000014 RCX=ffffffff8215c9e9 RDX=ffff888016451b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000005 RSP=ffff888019f0faa8 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000005 R11=00000000000b6a61 R12=ffff88800e26e400 R13=ffff888019f0fd90 R14=0000000000000014 R15=ffff888019f0fd90 RIP=ffffffff814c0864 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 00007fa13dc49900 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=00007fa13e200618 CR3=000000001c9d6000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fac9b3eb000 CR3=000000000ee58000 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=f4d28058ed5c8b825c4814cd728016ea XMM02=000000000011afe8eff9b2d0a8fce9cb XMM03=000000000011b0b82c67c8bc2e329bc3 XMM04=1262b0f3786934c800000000000ae988 XMM05=dfcdbad4f1609c3700000000001315b0 XMM06=0e64844901c89c140000000000130788 XMM07=e042d86d42eb936e0000000000121cf0 XMM08=3167b1902870cab1000000000011b0b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000