syzkaller login: [ 32.251762] BUG: Bad rss-counter state mm:000000008e7c3eb4 type:MM_FILEPAGES val:33 [ 32.253024] BUG: Bad rss-counter state mm:000000008e7c3eb4 type:MM_ANONPAGES val:22 [ 32.291565] ================================================================== [ 32.292637] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.293615] Read of size 8 at addr ffff88800fbbc6b0 by task sshd/222 [ 32.294401] [ 32.294627] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.295528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.296541] Call Trace: [ 32.296893] [ 32.297179] dump_stack_lvl+0x91/0xf0 [ 32.297686] print_report+0xcc/0x620 [ 32.298181] ? __virt_addr_valid+0x102/0x340 [ 32.298749] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.299384] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.300009] kasan_report+0xbe/0xf0 [ 32.300507] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.301149] vma_interval_tree_remove+0xc75/0xec0 [ 32.301761] vma_prepare+0xc54/0x11a0 [ 32.302246] __split_vma+0x5af/0x950 [ 32.302720] ? __pfx___split_vma+0x10/0x10 [ 32.303259] ? find_held_lock+0x2c/0x110 [ 32.303783] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.304356] ? lock_is_held_type+0x9f/0x120 [ 32.304908] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.305523] ? mtree_range_walk+0x632/0x900 [ 32.306086] ? mas_walk+0x5c7/0x7c0 [ 32.306572] do_vmi_munmap+0x1f1/0x2b0 [ 32.307069] mmap_region+0x1f9/0x2660 [ 32.307560] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.308078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.308802] ? __pfx_lock_acquire+0x10/0x10 [ 32.309375] ? __pfx_mmap_region+0x10/0x10 [ 32.309918] ? security_mmap_addr+0x7d/0xa0 [ 32.310464] ? get_unmapped_area+0x1f5/0x3f0 [ 32.311023] do_mmap+0x854/0xf00 [ 32.311473] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.311982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.312564] ksys_mmap_pgoff+0x3af/0x500 [ 32.313091] do_syscall_64+0x3f/0x90 [ 32.313584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.314246] RIP: 0033:0x7fdeffda8d82 [ 32.314713] 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 [ 32.316885] RSP: 002b:00007ffdbc94de88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.317821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdeffda8d82 [ 32.318706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdeff1e2000 [ 32.319574] RBP: 00007fdeff1e2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.320451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055580e4b1ec0 [ 32.321342] R13: 00007ffdbc94dea0 R14: 00007ffdbc94ded0 R15: 00007ffdbc94e230 [ 32.322235] [ 32.322539] [ 32.322764] Allocated by task 215: [ 32.323220] kasan_save_stack+0x22/0x50 [ 32.323738] kasan_set_track+0x25/0x30 [ 32.324253] __kasan_slab_alloc+0x59/0x70 [ 32.324796] kmem_cache_alloc+0x16b/0x370 [ 32.325336] vm_area_dup+0x20/0x160 [ 32.325808] __split_vma+0x170/0x950 [ 32.326290] split_vma+0xc6/0x110 [ 32.326740] mprotect_fixup+0x8d2/0xb30 [ 32.327253] do_mprotect_pkey+0x87e/0xd40 [ 32.327792] __x64_sys_mprotect+0x78/0xc0 [ 32.328324] do_syscall_64+0x3f/0x90 [ 32.328816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.329491] [ 32.329711] Freed by task 215: [ 32.330113] kasan_save_stack+0x22/0x50 [ 32.330622] kasan_set_track+0x25/0x30 [ 32.331121] kasan_save_free_info+0x2b/0x50 [ 32.331675] __kasan_slab_free+0x10a/0x190 [ 32.332220] kmem_cache_free+0x10d/0x4d0 [ 32.332741] rcu_core+0x8c8/0x2860 [ 32.333204] __do_softirq+0x1b7/0x7d4 [ 32.333692] [ 32.333913] Last potentially related work creation: [ 32.334511] kasan_save_stack+0x22/0x50 [ 32.335025] __kasan_record_aux_stack+0x8e/0xa0 [ 32.335610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.336260] remove_vma+0x139/0x170 [ 32.336723] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.337297] do_vmi_munmap+0x1f1/0x2b0 [ 32.337789] __vm_munmap+0x138/0x3a0 [ 32.338264] __x64_sys_munmap+0x59/0x80 [ 32.338769] do_syscall_64+0x3f/0x90 [ 32.339249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.339910] [ 32.340129] The buggy address belongs to the object at ffff88800fbbc658 [ 32.340129] which belongs to the cache vm_area_struct of size 168 [ 32.341655] The buggy address is located 88 bytes inside of [ 32.341655] freed 168-byte region [ffff88800fbbc658, ffff88800fbbc700) [ 32.343064] [ 32.343282] The buggy address belongs to the physical page: [ 32.343966] page:000000006dcec340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbbc [ 32.345067] memcg:ffff88800e4c4b01 [ 32.345500] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.346159] page_type: 0xffffffff() [ 32.346613] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.347552] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4c4b01 [ 32.348485] page dumped because: kasan: bad access detected [ 32.349175] [ 32.349397] Memory state around the buggy address: [ 32.349989] ffff88800fbbc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.350862] ffff88800fbbc600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.351726] >ffff88800fbbc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.352601] ^ [ 32.353193] ffff88800fbbc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.354066] ffff88800fbbc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.354929] ================================================================== [ 32.356152] Disabling lock debugging due to kernel taint [ 34.495863] BUG: Bad rss-counter state mm:0000000099d94e65 type:MM_FILEPAGES val:33 [ 34.496851] BUG: Bad rss-counter state mm:0000000099d94e65 type:MM_ANONPAGES val:22 [ 35.069378] BUG: Bad rss-counter state mm:000000007e24d29d type:MM_FILEPAGES val:33 [ 35.070554] BUG: Bad rss-counter state mm:000000007e24d29d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3905' (ECDSA) to the list of known hosts. 2023/06/20 19:01:34 fuzzer started 2023/06/20 19:01:34 dialing manager at localhost:36067 2023/06/20 19:01:34 checking machine... 2023/06/20 19:01:34 checking revisions... [ 35.687792] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:01:35 testing simple program... [ 35.736689] cgroup: Unknown subsys name 'net' [ 35.778419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018c07e00 RCX=0000000000000000 RDX=1ffff110033222da RSI=ffffffff81869619 RDI=ffff888018c07e08 RBP=ffff888018c07db0 RSP=ffff888018c07b10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000010 R11=0000000000000000 R12=0000000000000010 R13=0000000000000ab9 R14=ffff88800e744a00 R15=ffff888019911680 RIP=ffffffff81869640 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 00007f1793ccb700 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=00007f54651ed060 CR3=00000000169c2000 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=2034333a31303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a31303a3931203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801ca1f8f0 RCX=0000000000000001 RDX=1ffff11003943f2e RSI=ffffffff81370a8a RDI=ffff88801ca1f8fc RBP=ffff88801ca1f970 RSP=ffff88801ca1f808 R8 =0000000000000001 R9 =ffff88801ca1f868 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88801ca1f8f0 R13=0000000000000000 R14=ffff888015d43680 R15=0000000000000002 RIP=ffffffff813ad547 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 00007f7067767900 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=00007f7067746020 CR3=000000000d996000 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=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