syzkaller login: [ 30.837150] BUG: Bad rss-counter state mm:000000002112a0c1 type:MM_FILEPAGES val:33 [ 30.838340] BUG: Bad rss-counter state mm:000000002112a0c1 type:MM_ANONPAGES val:22 [ 30.876048] ================================================================== [ 30.877015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.877951] Read of size 8 at addr ffff88800d87bed8 by task sshd/218 [ 30.878795] [ 30.879014] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.879894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.881017] Call Trace: [ 30.881414] [ 30.881770] dump_stack_lvl+0x91/0xf0 [ 30.882371] print_report+0xcc/0x620 [ 30.882968] ? __virt_addr_valid+0x102/0x340 [ 30.883679] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.884435] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.885200] kasan_report+0xbe/0xf0 [ 30.885790] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886558] vma_interval_tree_remove+0xc75/0xec0 [ 30.887298] vma_prepare+0xc54/0x11a0 [ 30.887916] __split_vma+0x5af/0x950 [ 30.888493] ? __pfx___split_vma+0x10/0x10 [ 30.889146] ? find_held_lock+0x2c/0x110 [ 30.889795] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.890485] ? lock_is_held_type+0x9f/0x120 [ 30.891141] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.891947] ? mtree_range_walk+0x632/0x900 [ 30.892565] ? mas_walk+0x5c7/0x7c0 [ 30.893043] do_vmi_munmap+0x1f1/0x2b0 [ 30.893535] mmap_region+0x1f9/0x2660 [ 30.894023] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.894539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.895254] ? __pfx_lock_acquire+0x10/0x10 [ 30.895820] ? __pfx_mmap_region+0x10/0x10 [ 30.896360] ? security_mmap_addr+0x7d/0xa0 [ 30.896893] ? get_unmapped_area+0x1f5/0x3f0 [ 30.897442] do_mmap+0x854/0xf00 [ 30.897880] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.898371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.898937] ksys_mmap_pgoff+0x3af/0x500 [ 30.899448] do_syscall_64+0x3f/0x90 [ 30.899968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900612] RIP: 0033:0x7f05ac123d82 [ 30.901065] 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 [ 30.903190] RSP: 002b:00007fffda9cf118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.904132] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05ac123d82 [ 30.905005] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05ab55d000 [ 30.905862] RBP: 00007f05ab55d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.906726] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4f281bf70 [ 30.907582] R13: 00007fffda9cf130 R14: 00007fffda9cf160 R15: 00007fffda9cf4c0 [ 30.908450] [ 30.908752] [ 30.908968] Allocated by task 211: [ 30.909394] kasan_save_stack+0x22/0x50 [ 30.909898] kasan_set_track+0x25/0x30 [ 30.910390] __kasan_slab_alloc+0x59/0x70 [ 30.910915] kmem_cache_alloc+0x16b/0x370 [ 30.911430] vm_area_dup+0x20/0x160 [ 30.911920] __split_vma+0x170/0x950 [ 30.912388] split_vma+0xc6/0x110 [ 30.912835] mprotect_fixup+0x8d2/0xb30 [ 30.913338] do_mprotect_pkey+0x87e/0xd40 [ 30.913862] __x64_sys_mprotect+0x78/0xc0 [ 30.914382] do_syscall_64+0x3f/0x90 [ 30.914857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915493] [ 30.915746] Freed by task 211: [ 30.916142] kasan_save_stack+0x22/0x50 [ 30.916645] kasan_set_track+0x25/0x30 [ 30.917135] kasan_save_free_info+0x2b/0x50 [ 30.917685] __kasan_slab_free+0x10a/0x190 [ 30.918220] kmem_cache_free+0x10d/0x4d0 [ 30.918742] rcu_core+0x8c8/0x2860 [ 30.919184] __do_softirq+0x1b7/0x7d4 [ 30.919703] [ 30.919919] Last potentially related work creation: [ 30.920499] kasan_save_stack+0x22/0x50 [ 30.921007] __kasan_record_aux_stack+0x8e/0xa0 [ 30.921588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922235] remove_vma+0x139/0x170 [ 30.922694] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923253] do_vmi_munmap+0x1f1/0x2b0 [ 30.923787] __vm_munmap+0x138/0x3a0 [ 30.924258] __x64_sys_munmap+0x59/0x80 [ 30.924767] do_syscall_64+0x3f/0x90 [ 30.925241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925884] [ 30.926106] The buggy address belongs to the object at ffff88800d87be80 [ 30.926106] which belongs to the cache vm_area_struct of size 168 [ 30.927594] The buggy address is located 88 bytes inside of [ 30.927594] freed 168-byte region [ffff88800d87be80, ffff88800d87bf28) [ 30.929018] [ 30.929233] The buggy address belongs to the physical page: [ 30.929905] page:0000000027489387 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd87b [ 30.931004] memcg:ffff88800e029101 [ 30.931430] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.932119] page_type: 0xffffffff() [ 30.932576] raw: 0100000000000200 ffff88800879fc80 ffffea000037fe00 dead000000000006 [ 30.933502] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e029101 [ 30.934419] page dumped because: kasan: bad access detected [ 30.935090] [ 30.935307] Memory state around the buggy address: [ 30.935921] ffff88800d87bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.936782] ffff88800d87be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.937629] >ffff88800d87be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.938472] ^ [ 30.939200] ffff88800d87bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.940099] ffff88800d87bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.940958] ================================================================== [ 30.942085] Disabling lock debugging due to kernel taint [ 33.444170] BUG: Bad rss-counter state mm:000000004d4f882a type:MM_FILEPAGES val:33 [ 33.445403] BUG: Bad rss-counter state mm:000000004d4f882a type:MM_ANONPAGES val:22 [ 33.822928] BUG: Bad rss-counter state mm:0000000054364e7a type:MM_FILEPAGES val:33 [ 33.823933] BUG: Bad rss-counter state mm:0000000054364e7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16493' (ECDSA) to the list of known hosts. 2023/06/20 06:24:07 fuzzer started 2023/06/20 06:24:07 dialing manager at localhost:44161 2023/06/20 06:24:07 checking machine... 2023/06/20 06:24:07 checking revisions... [ 34.534302] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:24:08 testing simple program... [ 34.596834] cgroup: Unknown subsys name 'net' [ 34.630926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fd53 RSP=ffff88800f6bfbc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=0000000000000246 R13=ffff88800844e900 R14=ffffea00003907c0 R15=ffff88800e6bf720 RIP=ffffffff8135b910 RFL=00000016 [----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 00007f171eee1900 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=00007f171f496650 CR3=000000000fbea000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea00006d8a80 RCX=0000000000000000 RDX=ffff88800903b680 RSI=ffffffff81660a12 RDI=0000000000000007 RBP=ffff8880090df380 RSP=ffff8880090df0f8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000007 R15=ffffea00006d8a80 RIP=ffffffff814c0800 RFL=00000246 [---Z-P-] 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 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=00007ffc8fd699d8 CR3=0000000005482000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f1be89a4c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000