syzkaller login: [ 46.307904] BUG: Bad rss-counter state mm:000000006f0e7f40 type:MM_FILEPAGES val:33 [ 46.309092] BUG: Bad rss-counter state mm:000000006f0e7f40 type:MM_ANONPAGES val:22 [ 46.348414] ================================================================== [ 46.349580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.350521] Read of size 8 at addr ffff88800ec8d310 by task sshd/219 [ 46.351279] [ 46.351485] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.352322] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.353263] Call Trace: [ 46.353561] [ 46.353832] dump_stack_lvl+0x91/0xf0 [ 46.354293] print_report+0xcc/0x620 [ 46.354753] ? __virt_addr_valid+0x102/0x340 [ 46.355271] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.355854] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.356446] kasan_report+0xbe/0xf0 [ 46.356894] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.357483] vma_interval_tree_remove+0xc75/0xec0 [ 46.358052] vma_prepare+0xc54/0x11a0 [ 46.358506] __split_vma+0x5af/0x950 [ 46.358949] ? __pfx___split_vma+0x10/0x10 [ 46.359450] ? find_held_lock+0x2c/0x110 [ 46.359943] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.360486] ? lock_is_held_type+0x9f/0x120 [ 46.361020] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.361628] ? mtree_range_walk+0x632/0x900 [ 46.362177] ? mas_walk+0x5c7/0x7c0 [ 46.362645] do_vmi_munmap+0x1f1/0x2b0 [ 46.363131] mmap_region+0x1f9/0x2660 [ 46.363609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.364116] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.364827] ? __pfx_lock_acquire+0x10/0x10 [ 46.365359] ? __pfx_mmap_region+0x10/0x10 [ 46.365890] ? security_mmap_addr+0x7d/0xa0 [ 46.366449] ? get_unmapped_area+0x1f5/0x3f0 [ 46.367021] do_mmap+0x854/0xf00 [ 46.367487] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.368011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.368606] ksys_mmap_pgoff+0x3af/0x500 [ 46.369133] do_syscall_64+0x3f/0x90 [ 46.369616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.370256] RIP: 0033:0x7f3512511d82 [ 46.370708] 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 [ 46.372818] RSP: 002b:00007ffebb3efc78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.373707] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3512511d82 [ 46.374545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f351194b000 [ 46.375381] RBP: 00007f351194b000 R08: 0000000000000009 R09: 0000000000001000 [ 46.376238] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565157d15b20 [ 46.377072] R13: 00007ffebb3efc90 R14: 00007ffebb3efcc0 R15: 00007ffebb3f0020 [ 46.377917] [ 46.378210] [ 46.378425] Allocated by task 212: [ 46.378849] kasan_save_stack+0x22/0x50 [ 46.379348] kasan_set_track+0x25/0x30 [ 46.379841] __kasan_slab_alloc+0x59/0x70 [ 46.380368] kmem_cache_alloc+0x16b/0x370 [ 46.380880] vm_area_dup+0x20/0x160 [ 46.381324] __split_vma+0x170/0x950 [ 46.381790] split_vma+0xc6/0x110 [ 46.382227] mprotect_fixup+0x8d2/0xb30 [ 46.382722] do_mprotect_pkey+0x87e/0xd40 [ 46.383236] __x64_sys_mprotect+0x78/0xc0 [ 46.383754] do_syscall_64+0x3f/0x90 [ 46.384229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.384865] [ 46.385078] Freed by task 212: [ 46.385470] kasan_save_stack+0x22/0x50 [ 46.385975] kasan_set_track+0x25/0x30 [ 46.386468] kasan_save_free_info+0x2b/0x50 [ 46.386998] __kasan_slab_free+0x10a/0x190 [ 46.387528] kmem_cache_free+0x10d/0x4d0 [ 46.388032] rcu_core+0x8c8/0x2860 [ 46.388495] __do_softirq+0x1b7/0x7d4 [ 46.388967] [ 46.389182] Last potentially related work creation: [ 46.389774] kasan_save_stack+0x22/0x50 [ 46.390274] __kasan_record_aux_stack+0x8e/0xa0 [ 46.390851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.391489] remove_vma+0x139/0x170 [ 46.391935] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.392498] do_vmi_munmap+0x1f1/0x2b0 [ 46.392981] __vm_munmap+0x138/0x3a0 [ 46.393441] __x64_sys_munmap+0x59/0x80 [ 46.393932] do_syscall_64+0x3f/0x90 [ 46.394402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.395041] [ 46.395253] The buggy address belongs to the object at ffff88800ec8d2b8 [ 46.395253] which belongs to the cache vm_area_struct of size 168 [ 46.396723] The buggy address is located 88 bytes inside of [ 46.396723] freed 168-byte region [ffff88800ec8d2b8, ffff88800ec8d360) [ 46.398115] [ 46.398329] The buggy address belongs to the physical page: [ 46.398983] page:0000000084081de3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec8d [ 46.400056] memcg:ffff88800c72eb01 [ 46.400485] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.401136] page_type: 0xffffffff() [ 46.401585] raw: 0100000000000200 ffff88800879fc80 ffffea00003ab040 dead000000000008 [ 46.402508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c72eb01 [ 46.403412] page dumped because: kasan: bad access detected [ 46.404085] [ 46.404307] Memory state around the buggy address: [ 46.404901] ffff88800ec8d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 46.405761] ffff88800ec8d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 46.406608] >ffff88800ec8d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 46.407444] ^ [ 46.407911] ffff88800ec8d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.408771] ffff88800ec8d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 46.409618] ================================================================== [ 46.410733] Disabling lock debugging due to kernel taint [ 48.578122] BUG: Bad rss-counter state mm:000000007bb1ff9c type:MM_FILEPAGES val:33 [ 48.579271] BUG: Bad rss-counter state mm:000000007bb1ff9c type:MM_ANONPAGES val:22 [ 49.062073] BUG: Bad rss-counter state mm:00000000c02598fb type:MM_FILEPAGES val:33 [ 49.063054] BUG: Bad rss-counter state mm:00000000c02598fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8594' (ECDSA) to the list of known hosts. 2023/06/19 12:19:45 fuzzer started 2023/06/19 12:19:45 dialing manager at localhost:44161 2023/06/19 12:19:45 checking machine... 2023/06/19 12:19:45 checking revisions... [ 49.718816] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:19:45 testing simple program... [ 49.767135] cgroup: Unknown subsys name 'net' [ 49.808311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:27 Registers: info registers vcpu 0 RAX=ffff888016b00080 RBX=0000000000000000 RCX=000000000000034c RDX=dffffc0000000000 RSI=0000000000000000 RDI=ffff888016b037dc RBP=ffff88800d747a20 RSP=ffff88800d747990 R8 =1ffff11002d606fb R9 =1ffff1100d9c72c0 R10=0000000000000000 R11=0000000000000000 R12=ffff888016b03700 R13=ffffffff85d3d000 R14=000000000000034c R15=0000000b65fc9000 RIP=ffffffff81293560 RFL=00000013 [----A-C] 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 00007f5e121e3700 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=00007f4509202618 CR3=000000000e918000 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=39313a3231203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303737 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=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=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=00007fe6d6153028 CR3=00000000096a0000 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=c2561eec46689ea1d24fb1b214658684 XMM02=000000000011e010ec2efd57dc4c00df XMM03=00000000001245c87e7d97b1e6e8742f XMM04=b0160b1f8e5b34f400000000000ae988 XMM05=e4cb8bb95a7664b60000000000134930 XMM06=d0b9ef2dae72540a0000000000133798 XMM07=e042d86d42eb936e00000000001248a0 XMM08=7e7d97b1e6e8742f000000000011e070 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000