syzkaller login: [ 30.181356] BUG: Bad rss-counter state mm:00000000ba8d36a2 type:MM_FILEPAGES val:33 [ 30.182473] BUG: Bad rss-counter state mm:00000000ba8d36a2 type:MM_ANONPAGES val:22 [ 30.341185] ================================================================== [ 30.342270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.343375] Read of size 8 at addr ffff888015c5b3f8 by task sshd/220 [ 30.344425] [ 30.344686] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.345728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.346925] Call Trace: [ 30.347309] [ 30.347600] dump_stack_lvl+0x91/0xf0 [ 30.348111] print_report+0xcc/0x620 [ 30.348605] ? __virt_addr_valid+0x102/0x340 [ 30.349160] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349784] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.350414] kasan_report+0xbe/0xf0 [ 30.350888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.351516] vma_interval_tree_remove+0xc75/0xec0 [ 30.352130] vma_prepare+0xc54/0x11a0 [ 30.352608] __split_vma+0x5af/0x950 [ 30.353079] ? __pfx___split_vma+0x10/0x10 [ 30.353614] ? find_held_lock+0x2c/0x110 [ 30.354130] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.354701] ? lock_is_held_type+0x9f/0x120 [ 30.355238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.355865] ? mtree_range_walk+0x632/0x900 [ 30.356416] ? mas_walk+0x5c7/0x7c0 [ 30.356894] do_vmi_munmap+0x1f1/0x2b0 [ 30.357391] mmap_region+0x1f9/0x2660 [ 30.357870] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.358386] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.359106] ? __pfx_lock_acquire+0x10/0x10 [ 30.359639] ? __pfx_mmap_region+0x10/0x10 [ 30.360193] ? security_mmap_addr+0x7d/0xa0 [ 30.360719] ? get_unmapped_area+0x1f5/0x3f0 [ 30.361262] do_mmap+0x854/0xf00 [ 30.361702] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.362202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.362769] ksys_mmap_pgoff+0x3af/0x500 [ 30.363282] do_syscall_64+0x3f/0x90 [ 30.363774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364416] RIP: 0033:0x7f88ea70dd82 [ 30.364871] 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 [ 30.366986] RSP: 002b:00007ffe876c99f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.367906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f88ea70dd82 [ 30.368755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f88e9b47000 [ 30.369602] RBP: 00007f88e9b47000 R08: 0000000000000009 R09: 0000000000001000 [ 30.370450] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602779c5b20 [ 30.371290] R13: 00007ffe876c9a10 R14: 00007ffe876c9a40 R15: 00007ffe876c9da0 [ 30.372158] [ 30.372451] [ 30.372666] Allocated by task 213: [ 30.373088] kasan_save_stack+0x22/0x50 [ 30.373589] kasan_set_track+0x25/0x30 [ 30.374080] __kasan_slab_alloc+0x59/0x70 [ 30.374598] kmem_cache_alloc+0x16b/0x370 [ 30.375110] vm_area_dup+0x20/0x160 [ 30.375562] __split_vma+0x170/0x950 [ 30.376053] split_vma+0xc6/0x110 [ 30.376492] mprotect_fixup+0x8d2/0xb30 [ 30.376998] do_mprotect_pkey+0x87e/0xd40 [ 30.377515] __x64_sys_mprotect+0x78/0xc0 [ 30.378033] do_syscall_64+0x3f/0x90 [ 30.378506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379145] [ 30.379364] Freed by task 213: [ 30.379764] kasan_save_stack+0x22/0x50 [ 30.380265] kasan_set_track+0x25/0x30 [ 30.380757] kasan_save_free_info+0x2b/0x50 [ 30.381288] __kasan_slab_free+0x10a/0x190 [ 30.381820] kmem_cache_free+0x10d/0x4d0 [ 30.382328] rcu_core+0x8c8/0x2860 [ 30.382773] __do_softirq+0x1b7/0x7d4 [ 30.383250] [ 30.383464] Last potentially related work creation: [ 30.384066] kasan_save_stack+0x22/0x50 [ 30.384563] __kasan_record_aux_stack+0x8e/0xa0 [ 30.385136] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.385834] remove_vma+0x139/0x170 [ 30.386283] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.386839] do_vmi_munmap+0x1f1/0x2b0 [ 30.387324] __vm_munmap+0x138/0x3a0 [ 30.387797] __x64_sys_munmap+0x59/0x80 [ 30.388293] do_syscall_64+0x3f/0x90 [ 30.388776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.389419] [ 30.389635] The buggy address belongs to the object at ffff888015c5b3a0 [ 30.389635] which belongs to the cache vm_area_struct of size 168 [ 30.391113] The buggy address is located 88 bytes inside of [ 30.391113] freed 168-byte region [ffff888015c5b3a0, ffff888015c5b448) [ 30.392588] [ 30.392806] The buggy address belongs to the physical page: [ 30.393462] page:00000000e93312ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c5b [ 30.394550] memcg:ffff88801033ad01 [ 30.394974] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.395615] page_type: 0xffffffff() [ 30.396077] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.396989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801033ad01 [ 30.397883] page dumped because: kasan: bad access detected [ 30.398545] [ 30.398759] Memory state around the buggy address: [ 30.399337] ffff888015c5b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.400194] ffff888015c5b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.401045] >ffff888015c5b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.401891] ^ [ 30.402737] ffff888015c5b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.403600] ffff888015c5b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.404470] ================================================================== [ 30.405414] Disabling lock debugging due to kernel taint [ 32.805330] BUG: Bad rss-counter state mm:00000000bae8e90b type:MM_FILEPAGES val:33 [ 32.806584] BUG: Bad rss-counter state mm:00000000bae8e90b type:MM_ANONPAGES val:22 [ 33.259052] BUG: Bad rss-counter state mm:00000000fbfa5dd3 type:MM_FILEPAGES val:33 [ 33.260509] BUG: Bad rss-counter state mm:00000000fbfa5dd3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62480' (ECDSA) to the list of known hosts. 2023/06/20 19:04:47 fuzzer started 2023/06/20 19:04:48 dialing manager at localhost:36067 2023/06/20 19:04:48 checking machine... 2023/06/20 19:04:48 checking revisions... [ 33.979899] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:04:48 testing simple program... [ 34.033005] cgroup: Unknown subsys name 'net' [ 34.090393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:47 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=00007fc0faba9400 RCX=ffffffff813a0b19 RDX=ffff888015d51b40 RSI=0000000000000100 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888015d51b40 R15=ffff88800ceb2c60 RIP=ffffffff814c086b 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 00007fc0fa6b6900 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=00007ffee1882000 CR3=000000001ce3a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f55e48a2ee0 CR3=00000000095c8000 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=2037343a34303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000