syzkaller login: [ 30.093154] BUG: Bad rss-counter state mm:0000000048a42efd type:MM_FILEPAGES val:33 [ 30.094487] BUG: Bad rss-counter state mm:0000000048a42efd type:MM_ANONPAGES val:22 [ 30.250501] ================================================================== [ 30.251589] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.252699] Read of size 8 at addr ffff88801bc954e0 by task sshd/221 [ 30.253659] [ 30.253881] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.254741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.255730] Call Trace: [ 30.256062] [ 30.256350] dump_stack_lvl+0x91/0xf0 [ 30.256840] print_report+0xcc/0x620 [ 30.257339] ? __virt_addr_valid+0x102/0x340 [ 30.257889] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.258513] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.259131] kasan_report+0xbe/0xf0 [ 30.259618] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.260242] vma_interval_tree_remove+0xc75/0xec0 [ 30.260852] vma_prepare+0xc54/0x11a0 [ 30.261349] __split_vma+0x5af/0x950 [ 30.261827] ? __pfx___split_vma+0x10/0x10 [ 30.262352] ? find_held_lock+0x2c/0x110 [ 30.262869] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.263431] ? lock_is_held_type+0x9f/0x120 [ 30.263969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.264567] ? mtree_range_walk+0x632/0x900 [ 30.265136] ? mas_walk+0x5c7/0x7c0 [ 30.265616] do_vmi_munmap+0x1f1/0x2b0 [ 30.266104] mmap_region+0x1f9/0x2660 [ 30.266583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.267093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.267803] ? __pfx_lock_acquire+0x10/0x10 [ 30.268328] ? __pfx_mmap_region+0x10/0x10 [ 30.268864] ? security_mmap_addr+0x7d/0xa0 [ 30.269412] ? get_unmapped_area+0x1f5/0x3f0 [ 30.269959] do_mmap+0x854/0xf00 [ 30.270404] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.270895] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.271456] ksys_mmap_pgoff+0x3af/0x500 [ 30.271958] do_syscall_64+0x3f/0x90 [ 30.272434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.273092] RIP: 0033:0x7f2457f64d82 [ 30.273551] 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 [ 30.275661] RSP: 002b:00007ffe444abc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.276555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2457f64d82 [ 30.277399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f245739e000 [ 30.278261] RBP: 00007f245739e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.279110] R10: 0000000000000812 R11: 0000000000000206 R12: 000056270db93f70 [ 30.279957] R13: 00007ffe444abc40 R14: 00007ffe444abc70 R15: 00007ffe444abfd0 [ 30.280815] [ 30.281121] [ 30.281336] Allocated by task 214: [ 30.281771] kasan_save_stack+0x22/0x50 [ 30.282269] kasan_set_track+0x25/0x30 [ 30.282766] __kasan_slab_alloc+0x59/0x70 [ 30.283289] kmem_cache_alloc+0x16b/0x370 [ 30.283801] vm_area_dup+0x20/0x160 [ 30.284253] __split_vma+0x170/0x950 [ 30.284722] split_vma+0xc6/0x110 [ 30.285171] mprotect_fixup+0x8d2/0xb30 [ 30.285674] do_mprotect_pkey+0x87e/0xd40 [ 30.286187] __x64_sys_mprotect+0x78/0xc0 [ 30.286704] do_syscall_64+0x3f/0x90 [ 30.287181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.287831] [ 30.288044] Freed by task 214: [ 30.288429] kasan_save_stack+0x22/0x50 [ 30.288927] kasan_set_track+0x25/0x30 [ 30.289441] kasan_save_free_info+0x2b/0x50 [ 30.289964] __kasan_slab_free+0x10a/0x190 [ 30.290500] kmem_cache_free+0x10d/0x4d0 [ 30.291008] rcu_core+0x8c8/0x2860 [ 30.291448] __do_softirq+0x1b7/0x7d4 [ 30.291919] [ 30.292133] Last potentially related work creation: [ 30.292715] kasan_save_stack+0x22/0x50 [ 30.293221] __kasan_record_aux_stack+0x8e/0xa0 [ 30.293788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.294431] remove_vma+0x139/0x170 [ 30.294879] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.295434] do_vmi_munmap+0x1f1/0x2b0 [ 30.295912] __vm_munmap+0x138/0x3a0 [ 30.296376] __x64_sys_munmap+0x59/0x80 [ 30.296878] do_syscall_64+0x3f/0x90 [ 30.297356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.297987] [ 30.298199] The buggy address belongs to the object at ffff88801bc95488 [ 30.298199] which belongs to the cache vm_area_struct of size 168 [ 30.299665] The buggy address is located 88 bytes inside of [ 30.299665] freed 168-byte region [ffff88801bc95488, ffff88801bc95530) [ 30.301075] [ 30.301290] The buggy address belongs to the physical page: [ 30.301944] page:0000000092c263bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc95 [ 30.303035] memcg:ffff88801bc64a01 [ 30.303457] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.304105] page_type: 0xffffffff() [ 30.304549] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.305408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc64a01 [ 30.305964] page dumped because: kasan: bad access detected [ 30.306361] [ 30.306487] Memory state around the buggy address: [ 30.306844] ffff88801bc95380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.307354] ffff88801bc95400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.307865] >ffff88801bc95480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.308387] ^ [ 30.308842] ffff88801bc95500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.309373] ffff88801bc95580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.309879] ================================================================== [ 30.310598] Disabling lock debugging due to kernel taint [ 31.999772] BUG: Bad rss-counter state mm:000000006f547314 type:MM_FILEPAGES val:33 [ 32.001336] BUG: Bad rss-counter state mm:000000006f547314 type:MM_ANONPAGES val:22 [ 32.466568] BUG: Bad rss-counter state mm:00000000590e2def type:MM_FILEPAGES val:33 [ 32.467574] BUG: Bad rss-counter state mm:00000000590e2def type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27671' (ECDSA) to the list of known hosts. 2023/06/20 21:55:05 fuzzer started 2023/06/20 21:55:05 dialing manager at localhost:36067 2023/06/20 21:55:06 checking machine... 2023/06/20 21:55:06 checking revisions... [ 33.198931] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:55:06 testing simple program... [ 33.255123] cgroup: Unknown subsys name 'net' [ 33.317531] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81809a91 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b562d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018ac51c0 R15=ffff888015882410 RIP=ffffffff813ad47e 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 00007f714c3e3900 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=00007f714c99a618 CR3=000000000fca6000 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=0000000000000001 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=00007f10f0d00000 CR3=000000000cbf6000 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=3184fdf103c93f8e3943aa753be55b72 XMM02=ec2efd57dc4c00df000000000011ae48 XMM03=87fad5a30cef177c000000000011af18 XMM04=1ec1134729ec3f3300000000000ae988 XMM05=e4cb8bb95a7664b60000000000131aa0 XMM06=c291bd5c70af25b90000000000131928 XMM07=e042d86d42eb936e0000000000121b70 XMM08=87fad5a30cef177c000000000011af18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000