syzkaller login: [ 31.155782] BUG: Bad rss-counter state mm:00000000a4422087 type:MM_FILEPAGES val:33 [ 31.157141] BUG: Bad rss-counter state mm:00000000a4422087 type:MM_ANONPAGES val:22 [ 31.321346] ================================================================== [ 31.322283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.323246] Read of size 8 at addr ffff888014759228 by task sshd/220 [ 31.324102] [ 31.324321] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.325236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.326235] Call Trace: [ 31.326591] [ 31.326903] dump_stack_lvl+0x91/0xf0 [ 31.327396] print_report+0xcc/0x620 [ 31.327884] ? __virt_addr_valid+0x102/0x340 [ 31.328445] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329707] kasan_report+0xbe/0xf0 [ 31.330192] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330846] vma_interval_tree_remove+0xc75/0xec0 [ 31.331455] vma_prepare+0xc54/0x11a0 [ 31.331943] __split_vma+0x5af/0x950 [ 31.332444] ? __pfx___split_vma+0x10/0x10 [ 31.332972] ? find_held_lock+0x2c/0x110 [ 31.333497] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.334058] ? lock_is_held_type+0x9f/0x120 [ 31.334616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.335225] ? mtree_range_walk+0x632/0x900 [ 31.335777] ? mas_walk+0x5c7/0x7c0 [ 31.336260] do_vmi_munmap+0x1f1/0x2b0 [ 31.336752] mmap_region+0x1f9/0x2660 [ 31.337238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.337759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.338497] ? __pfx_lock_acquire+0x10/0x10 [ 31.339056] ? __pfx_mmap_region+0x10/0x10 [ 31.339587] ? security_mmap_addr+0x7d/0xa0 [ 31.340115] ? get_unmapped_area+0x1f5/0x3f0 [ 31.340665] do_mmap+0x854/0xf00 [ 31.341115] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.341616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.342186] ksys_mmap_pgoff+0x3af/0x500 [ 31.342729] do_syscall_64+0x3f/0x90 [ 31.343210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.343860] RIP: 0033:0x7f8995c65d82 [ 31.344323] 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 [ 31.346445] RSP: 002b:00007fffb5bc5688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.347360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8995c65d82 [ 31.348239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f899509f000 [ 31.349088] RBP: 00007f899509f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.349933] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e00a70aec0 [ 31.350812] R13: 00007fffb5bc56a0 R14: 00007fffb5bc56d0 R15: 00007fffb5bc5a30 [ 31.351665] [ 31.351966] [ 31.352184] Allocated by task 213: [ 31.352618] kasan_save_stack+0x22/0x50 [ 31.353133] kasan_set_track+0x25/0x30 [ 31.353627] __kasan_slab_alloc+0x59/0x70 [ 31.354167] kmem_cache_alloc+0x16b/0x370 [ 31.354689] vm_area_dup+0x20/0x160 [ 31.355148] __split_vma+0x170/0x950 [ 31.355615] split_vma+0xc6/0x110 [ 31.356057] mprotect_fixup+0x8d2/0xb30 [ 31.356563] do_mprotect_pkey+0x87e/0xd40 [ 31.357085] __x64_sys_mprotect+0x78/0xc0 [ 31.357610] do_syscall_64+0x3f/0x90 [ 31.358087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.358744] [ 31.358963] Freed by task 203: [ 31.359356] kasan_save_stack+0x22/0x50 [ 31.359862] kasan_set_track+0x25/0x30 [ 31.360360] kasan_save_free_info+0x2b/0x50 [ 31.360897] __kasan_slab_free+0x10a/0x190 [ 31.361426] kmem_cache_free+0x10d/0x4d0 [ 31.361935] rcu_core+0x8c8/0x2860 [ 31.362396] __do_softirq+0x1b7/0x7d4 [ 31.362876] [ 31.363098] Last potentially related work creation: [ 31.363716] kasan_save_stack+0x22/0x50 [ 31.364234] __kasan_record_aux_stack+0x8e/0xa0 [ 31.364811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.365458] remove_vma+0x139/0x170 [ 31.366002] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.366579] do_vmi_munmap+0x1f1/0x2b0 [ 31.367081] __vm_munmap+0x138/0x3a0 [ 31.367551] __x64_sys_munmap+0x59/0x80 [ 31.368046] do_syscall_64+0x3f/0x90 [ 31.368521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369162] [ 31.369379] The buggy address belongs to the object at ffff8880147591d0 [ 31.369379] which belongs to the cache vm_area_struct of size 168 [ 31.370855] The buggy address is located 88 bytes inside of [ 31.370855] freed 168-byte region [ffff8880147591d0, ffff888014759278) [ 31.372267] [ 31.372488] The buggy address belongs to the physical page: [ 31.373155] page:000000001dd50cde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14759 [ 31.374245] memcg:ffff88800ead8b01 [ 31.374691] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.375344] page_type: 0xffffffff() [ 31.375808] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.376736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ead8b01 [ 31.377644] page dumped because: kasan: bad access detected [ 31.378322] [ 31.378582] Memory state around the buggy address: [ 31.379280] ffff888014759100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.380134] ffff888014759180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.380994] >ffff888014759200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.381839] ^ [ 31.382415] ffff888014759280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.383271] ffff888014759300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.384113] ================================================================== [ 31.385209] Disabling lock debugging due to kernel taint [ 33.721547] BUG: Bad rss-counter state mm:00000000d601ff51 type:MM_FILEPAGES val:33 [ 33.722544] BUG: Bad rss-counter state mm:00000000d601ff51 type:MM_ANONPAGES val:22 [ 34.180196] BUG: Bad rss-counter state mm:0000000000edb1dd type:MM_FILEPAGES val:33 [ 34.181839] BUG: Bad rss-counter state mm:0000000000edb1dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43108' (ECDSA) to the list of known hosts. 2023/06/20 07:29:44 fuzzer started 2023/06/20 07:29:44 dialing manager at localhost:44161 2023/06/20 07:29:44 checking machine... 2023/06/20 07:29:44 checking revisions... [ 34.923667] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:29:44 testing simple program... [ 34.978008] cgroup: Unknown subsys name 'net' [ 35.023534] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:29:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff87b69480 RCX=0000000000000000 RDX=1ffffffff0f6d2a7 RSI=ffffffff813cc3a2 RDI=ffffffff87b69538 RBP=0000000000000000 RSP=ffff8880102afbf8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=7fffffffffffffff R13=003b9aca00000000 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff813c61eb RFL=00000046 [---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 00007f850d073900 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=00007f850c593000 CR3=000000000d47e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=267f9f35152a053100000000000ae988 XMM05=94f5eaeec8595bea0000000000134d08 XMM06=19e9129bd510f2350000000000133ba0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8182839d RSP=ffff88806cf09d70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffff88806cf361c8 R14=0000000000000002 R15=ffff88800f446000 RIP=ffffffff8135b910 RFL=00000016 [----AP-] 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 00007f1ef7ce9900 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=0000558a32d5f954 CR3=000000000c7d8000 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=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