syzkaller login: [ 28.742741] BUG: Bad rss-counter state mm:00000000ced84a3e type:MM_FILEPAGES val:33 [ 28.743785] BUG: Bad rss-counter state mm:00000000ced84a3e type:MM_ANONPAGES val:22 [ 29.012631] ================================================================== [ 29.013568] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.014547] Read of size 8 at addr ffff88800ee04df0 by task sshd/218 [ 29.015476] [ 29.015705] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.016628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.017646] Call Trace: [ 29.017975] [ 29.018270] dump_stack_lvl+0x91/0xf0 [ 29.018781] print_report+0xcc/0x620 [ 29.019277] ? __virt_addr_valid+0x102/0x340 [ 29.019834] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.020447] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.021071] kasan_report+0xbe/0xf0 [ 29.021537] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.022158] vma_interval_tree_remove+0xc75/0xec0 [ 29.022755] vma_prepare+0xc54/0x11a0 [ 29.023224] __split_vma+0x5af/0x950 [ 29.023688] ? __pfx___split_vma+0x10/0x10 [ 29.024210] ? find_held_lock+0x2c/0x110 [ 29.024741] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.025294] ? lock_is_held_type+0x9f/0x120 [ 29.025835] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.026444] ? mtree_range_walk+0x632/0x900 [ 29.026997] ? mas_walk+0x5c7/0x7c0 [ 29.027465] do_vmi_munmap+0x1f1/0x2b0 [ 29.027957] mmap_region+0x1f9/0x2660 [ 29.028436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.028964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.029693] ? __pfx_lock_acquire+0x10/0x10 [ 29.030225] ? __pfx_mmap_region+0x10/0x10 [ 29.030750] ? security_mmap_addr+0x7d/0xa0 [ 29.031270] ? get_unmapped_area+0x1f5/0x3f0 [ 29.031823] do_mmap+0x854/0xf00 [ 29.032267] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.032765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.033320] ksys_mmap_pgoff+0x3af/0x500 [ 29.033824] do_syscall_64+0x3f/0x90 [ 29.034300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.034950] RIP: 0033:0x7f9593e34d82 [ 29.035404] 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 [ 29.037522] RSP: 002b:00007ffc83c2fdc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.038416] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9593e34d82 [ 29.039266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f959326e000 [ 29.040103] RBP: 00007f959326e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.040956] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590c0fbfd90 [ 29.041794] R13: 00007ffc83c2fde0 R14: 00007ffc83c2fe10 R15: 00007ffc83c30170 [ 29.042651] [ 29.042944] [ 29.043156] Allocated by task 211: [ 29.043582] kasan_save_stack+0x22/0x50 [ 29.044088] kasan_set_track+0x25/0x30 [ 29.044581] __kasan_slab_alloc+0x59/0x70 [ 29.045096] kmem_cache_alloc+0x16b/0x370 [ 29.045604] vm_area_dup+0x20/0x160 [ 29.046053] __split_vma+0x170/0x950 [ 29.046511] split_vma+0xc6/0x110 [ 29.046945] mprotect_fixup+0x8d2/0xb30 [ 29.047446] do_mprotect_pkey+0x87e/0xd40 [ 29.047960] __x64_sys_mprotect+0x78/0xc0 [ 29.048473] do_syscall_64+0x3f/0x90 [ 29.048955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.049593] [ 29.049805] Freed by task 13: [ 29.050181] kasan_save_stack+0x22/0x50 [ 29.050678] kasan_set_track+0x25/0x30 [ 29.051170] kasan_save_free_info+0x2b/0x50 [ 29.051696] __kasan_slab_free+0x10a/0x190 [ 29.052223] kmem_cache_free+0x10d/0x4d0 [ 29.052741] rcu_core+0x8c8/0x2860 [ 29.053179] __do_softirq+0x1b7/0x7d4 [ 29.053653] [ 29.053864] Last potentially related work creation: [ 29.054442] kasan_save_stack+0x22/0x50 [ 29.054940] __kasan_record_aux_stack+0x8e/0xa0 [ 29.055504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.056136] remove_vma+0x139/0x170 [ 29.056588] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.057139] do_vmi_munmap+0x1f1/0x2b0 [ 29.057619] __vm_munmap+0x138/0x3a0 [ 29.058081] __x64_sys_munmap+0x59/0x80 [ 29.058569] do_syscall_64+0x3f/0x90 [ 29.059034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.059671] [ 29.059883] Second to last potentially related work creation: [ 29.060552] kasan_save_stack+0x22/0x50 [ 29.061068] __kasan_record_aux_stack+0x8e/0xa0 [ 29.061635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.062275] remove_vma+0x139/0x170 [ 29.062728] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.063288] do_vmi_munmap+0x1f1/0x2b0 [ 29.063770] mmap_region+0x1f9/0x2660 [ 29.064238] do_mmap+0x854/0xf00 [ 29.064679] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.065160] ksys_mmap_pgoff+0x3af/0x500 [ 29.065655] do_syscall_64+0x3f/0x90 [ 29.066133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.066772] [ 29.066983] The buggy address belongs to the object at ffff88800ee04d98 [ 29.066983] which belongs to the cache vm_area_struct of size 168 [ 29.068433] The buggy address is located 88 bytes inside of [ 29.068433] freed 168-byte region [ffff88800ee04d98, ffff88800ee04e40) [ 29.069835] [ 29.070049] The buggy address belongs to the physical page: [ 29.070693] page:00000000714a205e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee04 [ 29.071753] memcg:ffff888009670f01 [ 29.072173] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.072828] page_type: 0xffffffff() [ 29.073276] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4540 dead000000000002 [ 29.074201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009670f01 [ 29.075086] page dumped because: kasan: bad access detected [ 29.075742] [ 29.075953] Memory state around the buggy address: [ 29.076521] ffff88800ee04c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.077372] ffff88800ee04d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.078225] >ffff88800ee04d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.079062] ^ [ 29.079855] ffff88800ee04e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.080724] ffff88800ee04e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.081563] ================================================================== [ 29.082647] Disabling lock debugging due to kernel taint [ 31.000109] BUG: Bad rss-counter state mm:000000009b5146b6 type:MM_FILEPAGES val:33 [ 31.000996] BUG: Bad rss-counter state mm:000000009b5146b6 type:MM_ANONPAGES val:22 [ 31.586794] BUG: Bad rss-counter state mm:00000000e48c0320 type:MM_FILEPAGES val:33 [ 31.588127] BUG: Bad rss-counter state mm:00000000e48c0320 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53018' (ECDSA) to the list of known hosts. 2023/06/21 06:01:36 fuzzer started 2023/06/21 06:01:36 dialing manager at localhost:36067 2023/06/21 06:01:36 checking machine... 2023/06/21 06:01:36 checking revisions... [ 32.229486] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:01:37 testing simple program... [ 32.272634] cgroup: Unknown subsys name 'net' [ 32.315729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:36 Registers: info registers vcpu 0 RAX=1ffffffff0bf4b29 RBX=ffffffff85fa5948 RCX=ffffffff83641c43 RDX=0000000000000000 RSI=ffffffff863b4448 RDI=ffffffff85fa5944 RBP=ffffffff85fa5944 RSP=ffff88801583f408 R8 =ffffffff863b4448 R9 =ffff88801583f500 R10=0000000000038001 R11=000000000008abe0 R12=ffffffff85fa594c R13=ffffffff85fa5944 R14=ffffffff85fa5944 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007fa2b8020700 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=00007efd4ee7ceb0 CR3=000000000fbfa000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34353735342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343537 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff11001ceafac RCX=0000000000000000 RDX=1ffff11001c7ceb8 RSI=ffffffff81717e4c RDI=ffff88800e3e75c0 RBP=ffff88800eb4fcb0 RSP=ffff88800e757d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fe6ecdbb968 R13=0000000000000cc0 R14=0000000000000255 R15=ffff88800e3e7400 RIP=ffffffff81717e68 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe6ec219900 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=00007fe6ecdbb968 CR3=000000000fc7c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000