syzkaller login: [ 34.076856] BUG: Bad rss-counter state mm:00000000d5403ffc type:MM_FILEPAGES val:33 [ 34.078421] BUG: Bad rss-counter state mm:00000000d5403ffc type:MM_ANONPAGES val:22 [ 34.258689] ================================================================== [ 34.259611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.260561] Read of size 8 at addr ffff888016b70d08 by task sshd/220 [ 34.261469] [ 34.261694] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.262572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.263554] Call Trace: [ 34.263872] [ 34.264162] dump_stack_lvl+0x91/0xf0 [ 34.264671] print_report+0xcc/0x620 [ 34.265166] ? __virt_addr_valid+0x102/0x340 [ 34.265732] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.266355] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.266978] kasan_report+0xbe/0xf0 [ 34.267457] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.268087] vma_interval_tree_remove+0xc75/0xec0 [ 34.268702] vma_prepare+0xc54/0x11a0 [ 34.269189] __split_vma+0x5af/0x950 [ 34.269687] ? __pfx___split_vma+0x10/0x10 [ 34.270224] ? find_held_lock+0x2c/0x110 [ 34.270748] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.271310] ? lock_is_held_type+0x9f/0x120 [ 34.271857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.272470] ? mtree_range_walk+0x632/0x900 [ 34.273036] ? mas_walk+0x5c7/0x7c0 [ 34.273532] do_vmi_munmap+0x1f1/0x2b0 [ 34.274029] mmap_region+0x1f9/0x2660 [ 34.274522] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.275030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.275754] ? __pfx_lock_acquire+0x10/0x10 [ 34.276292] ? __pfx_mmap_region+0x10/0x10 [ 34.276823] ? security_mmap_addr+0x7d/0xa0 [ 34.277351] ? get_unmapped_area+0x1f5/0x3f0 [ 34.277930] do_mmap+0x854/0xf00 [ 34.278373] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.278872] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.279438] ksys_mmap_pgoff+0x3af/0x500 [ 34.279947] do_syscall_64+0x3f/0x90 [ 34.280425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.281078] RIP: 0033:0x7f2650ba5d82 [ 34.281559] 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 [ 34.283718] RSP: 002b:00007ffc6c0729e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.284635] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2650ba5d82 [ 34.285498] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f264ffdf000 [ 34.286342] RBP: 00007f264ffdf000 R08: 0000000000000009 R09: 0000000000001000 [ 34.287190] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfa3739ec0 [ 34.288054] R13: 00007ffc6c072a00 R14: 00007ffc6c072a30 R15: 00007ffc6c072d90 [ 34.288919] [ 34.289209] [ 34.289432] Allocated by task 213: [ 34.289866] kasan_save_stack+0x22/0x50 [ 34.290375] kasan_set_track+0x25/0x30 [ 34.290874] __kasan_slab_alloc+0x59/0x70 [ 34.291395] kmem_cache_alloc+0x16b/0x370 [ 34.291920] vm_area_dup+0x20/0x160 [ 34.292373] __split_vma+0x170/0x950 [ 34.292845] split_vma+0xc6/0x110 [ 34.293281] mprotect_fixup+0x8d2/0xb30 [ 34.293808] do_mprotect_pkey+0x87e/0xd40 [ 34.294332] __x64_sys_mprotect+0x78/0xc0 [ 34.294872] do_syscall_64+0x3f/0x90 [ 34.295342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.295978] [ 34.296193] Freed by task 13: [ 34.296576] kasan_save_stack+0x22/0x50 [ 34.297079] kasan_set_track+0x25/0x30 [ 34.297577] kasan_save_free_info+0x2b/0x50 [ 34.298111] __kasan_slab_free+0x10a/0x190 [ 34.298648] kmem_cache_free+0x10d/0x4d0 [ 34.299166] rcu_core+0x8c8/0x2860 [ 34.299621] __do_softirq+0x1b7/0x7d4 [ 34.300102] [ 34.300322] Last potentially related work creation: [ 34.300916] kasan_save_stack+0x22/0x50 [ 34.301432] __kasan_record_aux_stack+0x8e/0xa0 [ 34.302019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.302667] remove_vma+0x139/0x170 [ 34.303115] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.303688] do_vmi_munmap+0x1f1/0x2b0 [ 34.304176] __vm_munmap+0x138/0x3a0 [ 34.304639] __x64_sys_munmap+0x59/0x80 [ 34.305157] do_syscall_64+0x3f/0x90 [ 34.305645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.306285] [ 34.306504] The buggy address belongs to the object at ffff888016b70cb0 [ 34.306504] which belongs to the cache vm_area_struct of size 168 [ 34.307975] The buggy address is located 88 bytes inside of [ 34.307975] freed 168-byte region [ffff888016b70cb0, ffff888016b70d58) [ 34.309391] [ 34.309627] The buggy address belongs to the physical page: [ 34.310288] page:00000000c547dd2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b70 [ 34.311392] memcg:ffff8880183f1101 [ 34.311820] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.312467] page_type: 0xffffffff() [ 34.312920] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.313852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183f1101 [ 34.314763] page dumped because: kasan: bad access detected [ 34.315422] [ 34.315635] Memory state around the buggy address: [ 34.316225] ffff888016b70c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.317094] ffff888016b70c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.317987] >ffff888016b70d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.318856] ^ [ 34.319293] ffff888016b70d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.320164] ffff888016b70e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.321027] ================================================================== [ 34.322030] Disabling lock debugging due to kernel taint [ 36.161786] BUG: Bad rss-counter state mm:00000000903d01bd type:MM_FILEPAGES val:33 [ 36.163433] BUG: Bad rss-counter state mm:00000000903d01bd type:MM_ANONPAGES val:22 [ 36.617772] BUG: Bad rss-counter state mm:00000000696cb0fb type:MM_FILEPAGES val:33 [ 36.619459] BUG: Bad rss-counter state mm:00000000696cb0fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57196' (ECDSA) to the list of known hosts. 2023/06/19 21:12:51 fuzzer started 2023/06/19 21:12:51 dialing manager at localhost:44161 2023/06/19 21:12:51 checking machine... 2023/06/19 21:12:51 checking revisions... [ 37.333169] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:12:51 testing simple program... [ 37.386248] cgroup: Unknown subsys name 'net' [ 37.443604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:12:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83638915 RDX=dffffc0000000000 RSI=ffffffff83638916 RDI=ffff8880165d72d8 RBP=ffff8880165d7330 RSP=ffff8880165d7268 R8 =0000000000000001 R9 =ffff8880165d7318 R10=0000000000038001 R11=000000000008a842 R12=ffff8880165d7338 R13=ffff8880165d7320 R14=ffff8880165d7319 R15=ffff8880165d72d8 RIP=ffffffff8113071f RFL=00000282 [--S----] 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 00007f08cbd48900 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=00007f08cc2ff618 CR3=000000000ff86000 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=00007f774c1ee7e0 CR3=0000000013a7a000 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=155d0f20fda7c393ed4a6c3bf8def03c XMM02=ec2efd57dc4c00df000000000011c928 XMM03=219326774ba36dd6000000000011c9f8 XMM04=887c984f8539b5a400000000000ae988 XMM05=3f4d339a14eca2d80000000000134960 XMM06=4fda316b135da52b0000000000133d88 XMM07=e042d86d42eb936e0000000000124598 XMM08=219326774ba36dd6000000000011c9f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000