syzkaller login: [ 42.432606] BUG: Bad rss-counter state mm:00000000f9e80251 type:MM_FILEPAGES val:33 [ 42.433788] BUG: Bad rss-counter state mm:00000000f9e80251 type:MM_ANONPAGES val:22 [ 42.601639] ================================================================== [ 42.602610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.603545] Read of size 8 at addr ffff888015b8b4e0 by task sshd/220 [ 42.604318] [ 42.604543] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.605804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.606784] Call Trace: [ 42.607105] [ 42.607415] dump_stack_lvl+0x91/0xf0 [ 42.607917] print_report+0xcc/0x620 [ 42.608412] ? __virt_addr_valid+0x102/0x340 [ 42.609000] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.609631] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.610251] kasan_report+0xbe/0xf0 [ 42.610737] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.611362] vma_interval_tree_remove+0xc75/0xec0 [ 42.611979] vma_prepare+0xc54/0x11a0 [ 42.612468] __split_vma+0x5af/0x950 [ 42.612955] ? __pfx___split_vma+0x10/0x10 [ 42.613500] ? find_held_lock+0x2c/0x110 [ 42.614040] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.614607] ? lock_is_held_type+0x9f/0x120 [ 42.615156] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.615778] ? mtree_range_walk+0x632/0x900 [ 42.616351] ? mas_walk+0x5c7/0x7c0 [ 42.616863] do_vmi_munmap+0x1f1/0x2b0 [ 42.617368] mmap_region+0x1f9/0x2660 [ 42.617864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.618387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.619128] ? __pfx_lock_acquire+0x10/0x10 [ 42.619671] ? __pfx_mmap_region+0x10/0x10 [ 42.620209] ? security_mmap_addr+0x7d/0xa0 [ 42.620749] ? get_unmapped_area+0x1f5/0x3f0 [ 42.621314] do_mmap+0x854/0xf00 [ 42.621768] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.622273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.622847] ksys_mmap_pgoff+0x3af/0x500 [ 42.623368] do_syscall_64+0x3f/0x90 [ 42.623846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.624495] RIP: 0033:0x7fc293ffad82 [ 42.624962] 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 [ 42.627123] RSP: 002b:00007ffd78c02b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.628051] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc293ffad82 [ 42.628935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc293434000 [ 42.629817] RBP: 00007fc293434000 R08: 0000000000000009 R09: 0000000000001000 [ 42.630713] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aded0ecec0 [ 42.631580] R13: 00007ffd78c02b50 R14: 00007ffd78c02b80 R15: 00007ffd78c02ee0 [ 42.632461] [ 42.632769] [ 42.633001] Allocated by task 212: [ 42.633438] kasan_save_stack+0x22/0x50 [ 42.633946] kasan_set_track+0x25/0x30 [ 42.634446] __kasan_slab_alloc+0x59/0x70 [ 42.634984] kmem_cache_alloc+0x16b/0x370 [ 42.635509] vm_area_dup+0x20/0x160 [ 42.635978] __split_vma+0x170/0x950 [ 42.636451] split_vma+0xc6/0x110 [ 42.636914] mprotect_fixup+0x8d2/0xb30 [ 42.637430] do_mprotect_pkey+0x87e/0xd40 [ 42.637955] __x64_sys_mprotect+0x78/0xc0 [ 42.638488] do_syscall_64+0x3f/0x90 [ 42.638960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.639608] [ 42.639832] Freed by task 203: [ 42.640226] kasan_save_stack+0x22/0x50 [ 42.640742] kasan_set_track+0x25/0x30 [ 42.641253] kasan_save_free_info+0x2b/0x50 [ 42.641797] __kasan_slab_free+0x10a/0x190 [ 42.642341] kmem_cache_free+0x10d/0x4d0 [ 42.642854] rcu_core+0x8c8/0x2860 [ 42.643312] __do_softirq+0x1b7/0x7d4 [ 42.643801] [ 42.644028] Last potentially related work creation: [ 42.644627] kasan_save_stack+0x22/0x50 [ 42.645167] __kasan_record_aux_stack+0x8e/0xa0 [ 42.645742] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.646385] remove_vma+0x139/0x170 [ 42.646852] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.647412] do_vmi_munmap+0x1f1/0x2b0 [ 42.647901] __vm_munmap+0x138/0x3a0 [ 42.648389] __x64_sys_munmap+0x59/0x80 [ 42.648927] do_syscall_64+0x3f/0x90 [ 42.649410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.650060] [ 42.650278] The buggy address belongs to the object at ffff888015b8b488 [ 42.650278] which belongs to the cache vm_area_struct of size 168 [ 42.651741] The buggy address is located 88 bytes inside of [ 42.651741] freed 168-byte region [ffff888015b8b488, ffff888015b8b530) [ 42.653161] [ 42.653383] The buggy address belongs to the physical page: [ 42.654039] page:0000000007431562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b8b [ 42.655136] memcg:ffff888009ed9701 [ 42.655562] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.656203] page_type: 0xffffffff() [ 42.656654] raw: 0100000000000200 ffff88800879fc80 ffffea00005a40c0 dead000000000002 [ 42.657586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ed9701 [ 42.658499] page dumped because: kasan: bad access detected [ 42.659162] [ 42.659380] Memory state around the buggy address: [ 42.659961] ffff888015b8b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.660853] ffff888015b8b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.661725] >ffff888015b8b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.662589] ^ [ 42.663364] ffff888015b8b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 42.664247] ffff888015b8b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.665128] ================================================================== [ 42.666200] Disabling lock debugging due to kernel taint [ 44.978558] BUG: Bad rss-counter state mm:000000006105583d type:MM_FILEPAGES val:33 [ 44.979658] BUG: Bad rss-counter state mm:000000006105583d type:MM_ANONPAGES val:22 [ 45.494980] BUG: Bad rss-counter state mm:00000000b86c0ad7 type:MM_FILEPAGES val:33 [ 45.496297] BUG: Bad rss-counter state mm:00000000b86c0ad7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63761' (ECDSA) to the list of known hosts. 2023/06/20 07:21:21 fuzzer started 2023/06/20 07:21:22 dialing manager at localhost:44161 2023/06/20 07:21:22 checking machine... 2023/06/20 07:21:22 checking revisions... [ 46.303105] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:21:22 testing simple program... [ 46.349096] cgroup: Unknown subsys name 'net' [ 46.416238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:21:17 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800ea32540 RCX=ffffffff81370c98 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff888010257830 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81371098 RFL=00000083 [--S---C] 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 00007f44b4f3c900 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=00007f44b4359cb0 CR3=000000000da48000 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=b61cfe7f3c57628ebd40031fef0b8c49 XMM02=000000000011d880d59e07bde36eea69 XMM03=000000000011d9a8ec2efd57dc4c00df XMM04=1440b889b701a54900000000000ae988 XMM05=f2d624bc8bf4710b0000000000135090 XMM06=cc080c07871d362f0000000000133ac0 XMM07=fb795ef6d65770560000000000124348 XMM08=2c67c8bc2e329bc3000000000011d9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a5883f RBX=ffff888000000bb0 RCX=ffffffff8175ce85 RDX=dffffc0000000000 RSI=ffff88800e1a6bb0 RDI=0000000000000000 RBP=0000000000000043 RSP=ffff888016467cf8 R8 =0000000000000007 R9 =0000000000000043 R10=0000000000000043 R11=0000000000000000 R12=000000000e1a6067 R13=ffff88800e1a6bb0 R14=ffff888016467df0 R15=0000000000000000 RIP=ffffffff814c03b8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc9a822900 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=00007fdc9b376044 CR3=000000001bc1e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=ae3347fe64f3be48d54cbbcd0a13a226 XMM04=ee29c89494fa46c1252bb0eade220c13 XMM05=00000000000000000000000000000000 XMM06=ae29479464f34648252bb0cd0a130c13 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000