syzkaller login: [ 30.693693] BUG: Bad rss-counter state mm:000000006ece0107 type:MM_FILEPAGES val:33 [ 30.695117] BUG: Bad rss-counter state mm:000000006ece0107 type:MM_ANONPAGES val:22 [ 30.855269] ================================================================== [ 30.856197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.857133] Read of size 8 at addr ffff88800eadb058 by task sshd/220 [ 30.857900] [ 30.858125] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.859084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.860047] Call Trace: [ 30.860363] [ 30.860650] dump_stack_lvl+0x91/0xf0 [ 30.861137] print_report+0xcc/0x620 [ 30.861618] ? __virt_addr_valid+0x102/0x340 [ 30.862186] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862798] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863405] kasan_report+0xbe/0xf0 [ 30.863872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864497] vma_interval_tree_remove+0xc75/0xec0 [ 30.865100] vma_prepare+0xc54/0x11a0 [ 30.865574] __split_vma+0x5af/0x950 [ 30.866054] ? __pfx___split_vma+0x10/0x10 [ 30.866580] ? find_held_lock+0x2c/0x110 [ 30.867097] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867662] ? lock_is_held_type+0x9f/0x120 [ 30.868196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868794] ? mtree_range_walk+0x632/0x900 [ 30.869336] ? mas_walk+0x5c7/0x7c0 [ 30.869808] do_vmi_munmap+0x1f1/0x2b0 [ 30.870303] mmap_region+0x1f9/0x2660 [ 30.870779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871284] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871992] ? __pfx_lock_acquire+0x10/0x10 [ 30.872523] ? __pfx_mmap_region+0x10/0x10 [ 30.873051] ? security_mmap_addr+0x7d/0xa0 [ 30.873582] ? get_unmapped_area+0x1f5/0x3f0 [ 30.874156] do_mmap+0x854/0xf00 [ 30.874594] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875091] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875657] ksys_mmap_pgoff+0x3af/0x500 [ 30.876166] do_syscall_64+0x3f/0x90 [ 30.876646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877281] RIP: 0033:0x7fa1b6cb5d82 [ 30.877731] 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 [ 30.879854] RSP: 002b:00007ffd19ea6518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.880742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1b6cb5d82 [ 30.881582] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1b60ef000 [ 30.882432] RBP: 00007fa1b60ef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.883270] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619761cbd90 [ 30.884113] R13: 00007ffd19ea6530 R14: 00007ffd19ea6560 R15: 00007ffd19ea68c0 [ 30.884970] [ 30.885257] [ 30.885470] Allocated by task 213: [ 30.885893] kasan_save_stack+0x22/0x50 [ 30.886406] kasan_set_track+0x25/0x30 [ 30.886895] __kasan_slab_alloc+0x59/0x70 [ 30.887417] kmem_cache_alloc+0x16b/0x370 [ 30.887925] vm_area_dup+0x20/0x160 [ 30.888380] __split_vma+0x170/0x950 [ 30.888840] split_vma+0xc6/0x110 [ 30.889273] mprotect_fixup+0x8d2/0xb30 [ 30.889768] do_mprotect_pkey+0x87e/0xd40 [ 30.890306] __x64_sys_mprotect+0x78/0xc0 [ 30.890818] do_syscall_64+0x3f/0x90 [ 30.891287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891926] [ 30.892139] Freed by task 213: [ 30.892528] kasan_save_stack+0x22/0x50 [ 30.893031] kasan_set_track+0x25/0x30 [ 30.893525] kasan_save_free_info+0x2b/0x50 [ 30.894063] __kasan_slab_free+0x10a/0x190 [ 30.894593] kmem_cache_free+0x10d/0x4d0 [ 30.895092] rcu_core+0x8c8/0x2860 [ 30.895534] __do_softirq+0x1b7/0x7d4 [ 30.896004] [ 30.896217] Last potentially related work creation: [ 30.896809] kasan_save_stack+0x22/0x50 [ 30.897313] __kasan_record_aux_stack+0x8e/0xa0 [ 30.897880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.898537] remove_vma+0x139/0x170 [ 30.898989] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.899542] do_vmi_munmap+0x1f1/0x2b0 [ 30.900020] __vm_munmap+0x138/0x3a0 [ 30.900488] __x64_sys_munmap+0x59/0x80 [ 30.900980] do_syscall_64+0x3f/0x90 [ 30.901452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902107] [ 30.902319] The buggy address belongs to the object at ffff88800eadb000 [ 30.902319] which belongs to the cache vm_area_struct of size 168 [ 30.903777] The buggy address is located 88 bytes inside of [ 30.903777] freed 168-byte region [ffff88800eadb000, ffff88800eadb0a8) [ 30.905157] [ 30.905370] The buggy address belongs to the physical page: [ 30.906037] page:00000000e95df75f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeadb [ 30.907118] memcg:ffff888016d6c901 [ 30.907544] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.908180] page_type: 0xffffffff() [ 30.908624] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.909539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d6c901 [ 30.910449] page dumped because: kasan: bad access detected [ 30.911101] [ 30.911313] Memory state around the buggy address: [ 30.911884] ffff88800eadaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.912730] ffff88800eadaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.913579] >ffff88800eadb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.914432] ^ [ 30.915154] ffff88800eadb080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.915996] ffff88800eadb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.916836] ================================================================== [ 30.918146] Disabling lock debugging due to kernel taint [ 32.756298] BUG: Bad rss-counter state mm:00000000ef06cdd9 type:MM_FILEPAGES val:33 [ 32.757048] BUG: Bad rss-counter state mm:00000000ef06cdd9 type:MM_ANONPAGES val:22 [ 33.272436] BUG: Bad rss-counter state mm:000000000c91c239 type:MM_FILEPAGES val:33 [ 33.273598] BUG: Bad rss-counter state mm:000000000c91c239 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28745' (ECDSA) to the list of known hosts. 2023/06/21 05:52:30 fuzzer started 2023/06/21 05:52:30 dialing manager at localhost:36067 2023/06/21 05:52:30 checking machine... 2023/06/21 05:52:30 checking revisions... [ 33.916357] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:52:30 testing simple program... [ 33.971998] cgroup: Unknown subsys name 'net' [ 34.025048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:30 Registers: info registers vcpu 0 RAX=0000000000000015 RBX=0000000000000000 RCX=ffffea0000664a00 RDX=0000000000000000 RSI=ffff888019928000 RDI=00000000000005c0 RBP=ffffffff818d9c06 RSP=ffff88806ce09de8 R8 =00000000000005c0 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801992f8c0 R13=ffff888008fae500 R14=ffffffff818d9c06 R15=ffff888018e80380 RIP=ffffffff8180c9ea RFL=00000212 [----A--] 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 00007fe489e3f900 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=00007fffa13a1000 CR3=000000000c6e2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fedda0a7000 CR3=000000000f216000 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=8ba017e9b9edd2ab604ee54ea7d785d3 XMM02=ec2efd57dc4c00df000000000011a6f8 XMM03=0b8d805f78666622000000000011a7c8 XMM04=a3a386344395474000000000000ae988 XMM05=19e9129bd510f2350000000000131ab8 XMM06=082152375d9111160000000000130920 XMM07=e042d86d42eb936e0000000000121f60 XMM08=0b8d805f78666622000000000011a7c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000