syzkaller login: [ 31.103607] BUG: Bad rss-counter state mm:000000003e4e38df type:MM_FILEPAGES val:33 [ 31.104792] BUG: Bad rss-counter state mm:000000003e4e38df type:MM_ANONPAGES val:22 [ 31.257809] ================================================================== [ 31.258736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.259672] Read of size 8 at addr ffff8880169f96b0 by task sshd/221 [ 31.260515] [ 31.260744] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.261661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.262620] Call Trace: [ 31.262947] [ 31.263237] dump_stack_lvl+0x91/0xf0 [ 31.263744] print_report+0xcc/0x620 [ 31.264241] ? __virt_addr_valid+0x102/0x340 [ 31.264818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266085] kasan_report+0xbe/0xf0 [ 31.266572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267209] vma_interval_tree_remove+0xc75/0xec0 [ 31.267832] vma_prepare+0xc54/0x11a0 [ 31.268322] __split_vma+0x5af/0x950 [ 31.268808] ? __pfx___split_vma+0x10/0x10 [ 31.269371] ? find_held_lock+0x2c/0x110 [ 31.269952] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270532] ? lock_is_held_type+0x9f/0x120 [ 31.271087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.271721] ? mtree_range_walk+0x632/0x900 [ 31.272287] ? mas_walk+0x5c7/0x7c0 [ 31.272772] do_vmi_munmap+0x1f1/0x2b0 [ 31.273306] mmap_region+0x1f9/0x2660 [ 31.273797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.274325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.275053] ? __pfx_lock_acquire+0x10/0x10 [ 31.275599] ? __pfx_mmap_region+0x10/0x10 [ 31.276141] ? security_mmap_addr+0x7d/0xa0 [ 31.276682] ? get_unmapped_area+0x1f5/0x3f0 [ 31.277256] do_mmap+0x854/0xf00 [ 31.277702] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.278205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.278780] ksys_mmap_pgoff+0x3af/0x500 [ 31.279296] do_syscall_64+0x3f/0x90 [ 31.279787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280472] RIP: 0033:0x7f33d9fabd82 [ 31.280921] 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 [ 31.283076] RSP: 002b:00007ffdcda75a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.283998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33d9fabd82 [ 31.284862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33d93e5000 [ 31.285755] RBP: 00007f33d93e5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.286611] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562df319dec0 [ 31.287472] R13: 00007ffdcda75a50 R14: 00007ffdcda75a80 R15: 00007ffdcda75de0 [ 31.288353] [ 31.288643] [ 31.288859] Allocated by task 214: [ 31.289327] kasan_save_stack+0x22/0x50 [ 31.289839] kasan_set_track+0x25/0x30 [ 31.290347] __kasan_slab_alloc+0x59/0x70 [ 31.290887] kmem_cache_alloc+0x16b/0x370 [ 31.291415] vm_area_dup+0x20/0x160 [ 31.291883] __split_vma+0x170/0x950 [ 31.292367] split_vma+0xc6/0x110 [ 31.292819] mprotect_fixup+0x8d2/0xb30 [ 31.293349] do_mprotect_pkey+0x87e/0xd40 [ 31.293866] __x64_sys_mprotect+0x78/0xc0 [ 31.294394] do_syscall_64+0x3f/0x90 [ 31.294875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295525] [ 31.295742] Freed by task 214: [ 31.296138] kasan_save_stack+0x22/0x50 [ 31.296643] kasan_set_track+0x25/0x30 [ 31.297159] kasan_save_free_info+0x2b/0x50 [ 31.297695] __kasan_slab_free+0x10a/0x190 [ 31.298227] kmem_cache_free+0x10d/0x4d0 [ 31.298736] rcu_core+0x8c8/0x2860 [ 31.299179] __do_softirq+0x1b7/0x7d4 [ 31.299662] [ 31.299877] Last potentially related work creation: [ 31.300463] kasan_save_stack+0x22/0x50 [ 31.300985] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302239] remove_vma+0x139/0x170 [ 31.302704] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.303275] do_vmi_munmap+0x1f1/0x2b0 [ 31.303766] __vm_munmap+0x138/0x3a0 [ 31.304240] __x64_sys_munmap+0x59/0x80 [ 31.304753] do_syscall_64+0x3f/0x90 [ 31.305262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305921] [ 31.306143] The buggy address belongs to the object at ffff8880169f9658 [ 31.306143] which belongs to the cache vm_area_struct of size 168 [ 31.307665] The buggy address is located 88 bytes inside of [ 31.307665] freed 168-byte region [ffff8880169f9658, ffff8880169f9700) [ 31.309107] [ 31.309353] The buggy address belongs to the physical page: [ 31.310022] page:00000000a73ba178 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169f9 [ 31.311138] memcg:ffff88800ee0a901 [ 31.311575] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.312253] page_type: 0xffffffff() [ 31.312700] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.313670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee0a901 [ 31.314590] page dumped because: kasan: bad access detected [ 31.315268] [ 31.315495] Memory state around the buggy address: [ 31.316081] ffff8880169f9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.316932] ffff8880169f9600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.317845] >ffff8880169f9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.318766] ^ [ 31.319370] ffff8880169f9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.320264] ffff8880169f9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.321159] ================================================================== [ 31.322264] Disabling lock debugging due to kernel taint [ 33.319314] BUG: Bad rss-counter state mm:0000000097f742d6 type:MM_FILEPAGES val:33 [ 33.320600] BUG: Bad rss-counter state mm:0000000097f742d6 type:MM_ANONPAGES val:22 [ 33.777311] BUG: Bad rss-counter state mm:000000007d9ef120 type:MM_FILEPAGES val:33 [ 33.778205] BUG: Bad rss-counter state mm:000000007d9ef120 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22378' (ECDSA) to the list of known hosts. 2023/06/20 17:23:46 fuzzer started 2023/06/20 17:23:46 dialing manager at localhost:36067 2023/06/20 17:23:46 checking machine... 2023/06/20 17:23:46 checking revisions... [ 34.500156] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:23:46 testing simple program... [ 34.542535] cgroup: Unknown subsys name 'net' [ 34.590895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff10cdcc38 CR3=0000000005482000 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=00007f68e18935100000560571a9c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81ef1138 RCX=0000000000000001 RDX=1ffff11003034f10 RSI=ffff8880181a7ca8 RDI=ffffffff81ef1138 RBP=ffffffff81ef1138 RSP=ffff8880181a77d0 R8 =0000000000000001 R9 =ffff8880181a7868 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880181a78f0 R13=0000000000000000 R14=ffff88800f0a8000 R15=0000000000092cc0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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 00007f45f87b5900 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=00007f45f8d6c618 CR3=000000000f72c000 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