syzkaller login: [ 38.718151] BUG: Bad rss-counter state mm:000000004e99e575 type:MM_FILEPAGES val:33 [ 38.719879] BUG: Bad rss-counter state mm:000000004e99e575 type:MM_ANONPAGES val:22 [ 38.890726] ================================================================== [ 38.891886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.892991] Read of size 8 at addr ffff888018aeedf0 by task sshd/220 [ 38.893830] [ 38.894070] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.895042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896070] Call Trace: [ 38.896417] [ 38.896731] dump_stack_lvl+0x91/0xf0 [ 38.897271] print_report+0xcc/0x620 [ 38.897799] ? __virt_addr_valid+0x102/0x340 [ 38.898397] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899074] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899703] kasan_report+0xbe/0xf0 [ 38.900253] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900994] vma_interval_tree_remove+0xc75/0xec0 [ 38.901683] vma_prepare+0xc54/0x11a0 [ 38.902187] __split_vma+0x5af/0x950 [ 38.902666] ? __pfx___split_vma+0x10/0x10 [ 38.903297] ? find_held_lock+0x2c/0x110 [ 38.903911] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.904563] ? lock_is_held_type+0x9f/0x120 [ 38.905199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905893] ? mtree_range_walk+0x632/0x900 [ 38.906470] ? mas_walk+0x5c7/0x7c0 [ 38.907012] do_vmi_munmap+0x1f1/0x2b0 [ 38.907568] mmap_region+0x1f9/0x2660 [ 38.908152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.908755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.909586] ? __pfx_lock_acquire+0x10/0x10 [ 38.910154] ? __pfx_mmap_region+0x10/0x10 [ 38.910683] ? security_mmap_addr+0x7d/0xa0 [ 38.911340] ? get_unmapped_area+0x1f5/0x3f0 [ 38.911984] do_mmap+0x854/0xf00 [ 38.912492] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.913084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.913727] ksys_mmap_pgoff+0x3af/0x500 [ 38.914253] do_syscall_64+0x3f/0x90 [ 38.914748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915519] RIP: 0033:0x7ff13d2e4d82 [ 38.916072] 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 [ 38.918446] RSP: 002b:00007fffbf558188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.919529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff13d2e4d82 [ 38.920515] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff13c71e000 [ 38.921430] RBP: 00007ff13c71e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.922369] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d7eadbec0 [ 38.923355] R13: 00007fffbf5581a0 R14: 00007fffbf5581d0 R15: 00007fffbf558530 [ 38.924316] [ 38.924645] [ 38.924891] Allocated by task 213: [ 38.925316] kasan_save_stack+0x22/0x50 [ 38.925833] kasan_set_track+0x25/0x30 [ 38.926377] __kasan_slab_alloc+0x59/0x70 [ 38.926976] kmem_cache_alloc+0x16b/0x370 [ 38.927550] vm_area_dup+0x20/0x160 [ 38.928058] __split_vma+0x170/0x950 [ 38.928575] split_vma+0xc6/0x110 [ 38.929070] mprotect_fixup+0x8d2/0xb30 [ 38.929633] do_mprotect_pkey+0x87e/0xd40 [ 38.930220] __x64_sys_mprotect+0x78/0xc0 [ 38.930809] do_syscall_64+0x3f/0x90 [ 38.931358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932087] [ 38.932325] Freed by task 213: [ 38.932764] kasan_save_stack+0x22/0x50 [ 38.933344] kasan_set_track+0x25/0x30 [ 38.933902] kasan_save_free_info+0x2b/0x50 [ 38.934434] __kasan_slab_free+0x10a/0x190 [ 38.935013] kmem_cache_free+0x10d/0x4d0 [ 38.935587] rcu_core+0x8c8/0x2860 [ 38.936092] __do_softirq+0x1b7/0x7d4 [ 38.936627] [ 38.936874] Last potentially related work creation: [ 38.937460] kasan_save_stack+0x22/0x50 [ 38.937983] __kasan_record_aux_stack+0x8e/0xa0 [ 38.938625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.939347] remove_vma+0x139/0x170 [ 38.939855] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.940468] do_vmi_munmap+0x1f1/0x2b0 [ 38.940998] __vm_munmap+0x138/0x3a0 [ 38.941514] __x64_sys_munmap+0x59/0x80 [ 38.942057] do_syscall_64+0x3f/0x90 [ 38.942528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943249] [ 38.943492] The buggy address belongs to the object at ffff888018aeed98 [ 38.943492] which belongs to the cache vm_area_struct of size 168 [ 38.945134] The buggy address is located 88 bytes inside of [ 38.945134] freed 168-byte region [ffff888018aeed98, ffff888018aeee40) [ 38.946631] [ 38.946879] The buggy address belongs to the physical page: [ 38.947636] page:000000003c055b1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18aee [ 38.948872] memcg:ffff888018ae1801 [ 38.949304] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.949977] page_type: 0xffffffff() [ 38.950471] raw: 0100000000000200 ffff8880087a0c80 ffffea0000399900 dead000000000004 [ 38.951472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ae1801 [ 38.952464] page dumped because: kasan: bad access detected [ 38.953184] [ 38.953418] Memory state around the buggy address: [ 38.954058] ffff888018aeec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.955050] ffff888018aeed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.956023] >ffff888018aeed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.956995] ^ [ 38.957921] ffff888018aeee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.958780] ffff888018aeee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.959764] ================================================================== [ 38.960947] Disabling lock debugging due to kernel taint [ 40.839470] BUG: Bad rss-counter state mm:00000000c0465c1b type:MM_FILEPAGES val:33 [ 40.840642] BUG: Bad rss-counter state mm:00000000c0465c1b type:MM_ANONPAGES val:22 [ 41.235593] BUG: Bad rss-counter state mm:00000000f8762f7e type:MM_FILEPAGES val:33 [ 41.237055] BUG: Bad rss-counter state mm:00000000f8762f7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62648' (ECDSA) to the list of known hosts. 2023/06/20 17:57:28 fuzzer started 2023/06/20 17:57:29 dialing manager at localhost:36067 2023/06/20 17:57:29 checking machine... 2023/06/20 17:57:29 checking revisions... [ 41.953764] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:57:29 testing simple program... [ 41.995970] cgroup: Unknown subsys name 'net' [ 42.040410] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:57:28 Registers: info registers vcpu 0 RAX=1ffffffff0c29cbd RBX=0000000000000001 RCX=ffffffff8614e5e8 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff8614e5ea RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff8614e5ec R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000246c8 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88800e85fde0 R15=ffff88806ce09a78 RIP=ffffffff811311c7 RFL=00000216 [----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 00007f8e17495900 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=00007f8e17a4d0b0 CR3=000000000f30e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f6f83028d80 CR3=0000000008c74000 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=98bc35287f4f4f829c44dae02bf330de XMM02=000000000011b548ec2efd57dc4c00df XMM03=0000000000121f08140d1498a9e2251a XMM04=399fda61a976420200000000000ae988 XMM05=19e9129bd510f2350000000000131b28 XMM06=4fda316b135da52b00000000001319b0 XMM07=e042d86d42eb936e00000000001221e0 XMM08=140d1498a9e2251a000000000011b5a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000