syzkaller login: [ 36.858323] BUG: Bad rss-counter state mm:00000000d0e94184 type:MM_FILEPAGES val:33 [ 36.859502] BUG: Bad rss-counter state mm:00000000d0e94184 type:MM_ANONPAGES val:22 [ 36.897144] ================================================================== [ 36.898063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.899000] Read of size 8 at addr ffff888019cd9c20 by task sshd/219 [ 36.899766] [ 36.900092] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.900988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.901969] Call Trace: [ 36.902311] [ 36.902606] dump_stack_lvl+0x91/0xf0 [ 36.903103] print_report+0xcc/0x620 [ 36.903599] ? __virt_addr_valid+0x102/0x340 [ 36.904164] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.904830] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.905479] kasan_report+0xbe/0xf0 [ 36.905965] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.906592] vma_interval_tree_remove+0xc75/0xec0 [ 36.907196] vma_prepare+0xc54/0x11a0 [ 36.907677] __split_vma+0x5af/0x950 [ 36.908149] ? __pfx___split_vma+0x10/0x10 [ 36.908695] ? find_held_lock+0x2c/0x110 [ 36.909224] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.909793] ? lock_is_held_type+0x9f/0x120 [ 36.910343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.910951] ? mtree_range_walk+0x632/0x900 [ 36.911501] ? mas_walk+0x5c7/0x7c0 [ 36.911975] do_vmi_munmap+0x1f1/0x2b0 [ 36.912488] mmap_region+0x1f9/0x2660 [ 36.912975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.913489] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.914207] ? __pfx_lock_acquire+0x10/0x10 [ 36.914739] ? __pfx_mmap_region+0x10/0x10 [ 36.915274] ? security_mmap_addr+0x7d/0xa0 [ 36.915805] ? get_unmapped_area+0x1f5/0x3f0 [ 36.916357] do_mmap+0x854/0xf00 [ 36.916825] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.917324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.917886] ksys_mmap_pgoff+0x3af/0x500 [ 36.918397] do_syscall_64+0x3f/0x90 [ 36.918876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.919524] RIP: 0033:0x7fcf5cf2ad82 [ 36.919983] 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 [ 36.922121] RSP: 002b:00007ffd60d8e598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.923030] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf5cf2ad82 [ 36.923893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf5c364000 [ 36.924755] RBP: 00007fcf5c364000 R08: 0000000000000009 R09: 0000000000001000 [ 36.925611] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629e93e6980 [ 36.926467] R13: 00007ffd60d8e5b0 R14: 00007ffd60d8e5e0 R15: 00007ffd60d8e940 [ 36.927354] [ 36.927651] [ 36.927870] Allocated by task 212: [ 36.928308] kasan_save_stack+0x22/0x50 [ 36.928844] kasan_set_track+0x25/0x30 [ 36.929344] __kasan_slab_alloc+0x59/0x70 [ 36.929874] kmem_cache_alloc+0x16b/0x370 [ 36.930395] vm_area_dup+0x20/0x160 [ 36.930851] __split_vma+0x170/0x950 [ 36.931322] split_vma+0xc6/0x110 [ 36.931775] mprotect_fixup+0x8d2/0xb30 [ 36.932290] do_mprotect_pkey+0x87e/0xd40 [ 36.932821] __x64_sys_mprotect+0x78/0xc0 [ 36.933356] do_syscall_64+0x3f/0x90 [ 36.933836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.934483] [ 36.934701] Freed by task 60: [ 36.935080] kasan_save_stack+0x22/0x50 [ 36.935582] kasan_set_track+0x25/0x30 [ 36.936083] kasan_save_free_info+0x2b/0x50 [ 36.936623] __kasan_slab_free+0x10a/0x190 [ 36.937154] kmem_cache_free+0x10d/0x4d0 [ 36.937662] rcu_core+0x8c8/0x2860 [ 36.938112] __do_softirq+0x1b7/0x7d4 [ 36.938589] [ 36.938810] Last potentially related work creation: [ 36.939392] kasan_save_stack+0x22/0x50 [ 36.939899] __kasan_record_aux_stack+0x8e/0xa0 [ 36.940500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.941145] remove_vma+0x139/0x170 [ 36.941612] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.942171] do_vmi_munmap+0x1f1/0x2b0 [ 36.942657] __vm_munmap+0x138/0x3a0 [ 36.943128] __x64_sys_munmap+0x59/0x80 [ 36.943627] do_syscall_64+0x3f/0x90 [ 36.944107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.944763] [ 36.944982] The buggy address belongs to the object at ffff888019cd9bc8 [ 36.944982] which belongs to the cache vm_area_struct of size 168 [ 36.946448] The buggy address is located 88 bytes inside of [ 36.946448] freed 168-byte region [ffff888019cd9bc8, ffff888019cd9c70) [ 36.947855] [ 36.948070] The buggy address belongs to the physical page: [ 36.948741] page:000000000e579dc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd9 [ 36.949823] memcg:ffff88800f26bd01 [ 36.950254] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.950950] page_type: 0xffffffff() [ 36.951406] raw: 0100000000000200 ffff88800879fc80 ffffea000032ef40 dead000000000003 [ 36.952326] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f26bd01 [ 36.953256] page dumped because: kasan: bad access detected [ 36.953918] [ 36.954136] Memory state around the buggy address: [ 36.954713] ffff888019cd9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.955570] ffff888019cd9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.956450] >ffff888019cd9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.957313] ^ [ 36.957848] ffff888019cd9c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.958716] ffff888019cd9d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.959582] ================================================================== [ 36.960575] Disabling lock debugging due to kernel taint [ 38.928298] BUG: Bad rss-counter state mm:0000000063948458 type:MM_FILEPAGES val:33 [ 38.929481] BUG: Bad rss-counter state mm:0000000063948458 type:MM_ANONPAGES val:22 [ 39.320782] BUG: Bad rss-counter state mm:0000000092c59eff type:MM_FILEPAGES val:33 [ 39.321964] BUG: Bad rss-counter state mm:0000000092c59eff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46516' (ECDSA) to the list of known hosts. 2023/06/19 15:48:43 fuzzer started 2023/06/19 15:48:43 dialing manager at localhost:44161 2023/06/19 15:48:43 checking machine... 2023/06/19 15:48:43 checking revisions... [ 40.031937] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:48:43 testing simple program... [ 40.081044] cgroup: Unknown subsys name 'net' [ 40.145275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:48:37 Registers: info registers vcpu 0 RAX=ffff88800b6656e0 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015ecb680 RSI=ffffffff81acbd20 RDI=0000000000000001 RBP=ffff88800ff04000 RSP=ffff88801470fa78 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800b6656e0 R13=0000000000000000 R14=0000000000000001 R15=000000000000171f RIP=ffffffff81acbd28 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb2c612e700 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=00007fd9cf972618 CR3=00000000199d4000 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=2032343a38343a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a38343a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f3dcced8c90 CR3=000000000d820000 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=8f42f3ce5d9c3b9ffd436560d9052ab7 XMM02=ec2efd57dc4c00df000000000011cc18 XMM03=fdf57f1df610899f000000000011cce8 XMM04=ce251b5a8a7e8a6b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133c18 XMM06=36d68fb1f0e467ed0000000000132a80 XMM07=e042d86d42eb936e00000000001243a8 XMM08=fdf57f1df610899f000000000011cce8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000