syzkaller login: [ 30.140915] BUG: Bad rss-counter state mm:0000000088b0d22a type:MM_FILEPAGES val:33 [ 30.142063] BUG: Bad rss-counter state mm:0000000088b0d22a type:MM_ANONPAGES val:22 [ 30.321839] ================================================================== [ 30.322789] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.323773] Read of size 8 at addr ffff88800c4e25c8 by task sshd/223 [ 30.324675] [ 30.324917] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.325872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.327295] Call Trace: [ 30.327805] [ 30.328246] dump_stack_lvl+0x91/0xf0 [ 30.329014] print_report+0xcc/0x620 [ 30.329783] ? __virt_addr_valid+0x102/0x340 [ 30.330601] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.331425] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.332239] kasan_report+0xbe/0xf0 [ 30.332852] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.333680] vma_interval_tree_remove+0xc75/0xec0 [ 30.334469] vma_prepare+0xc54/0x11a0 [ 30.335091] __split_vma+0x5af/0x950 [ 30.335706] ? __pfx___split_vma+0x10/0x10 [ 30.336405] ? find_held_lock+0x2c/0x110 [ 30.337082] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.337831] ? lock_is_held_type+0x9f/0x120 [ 30.338434] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.339164] ? mtree_range_walk+0x632/0x900 [ 30.339851] ? mas_walk+0x5c7/0x7c0 [ 30.340453] do_vmi_munmap+0x1f1/0x2b0 [ 30.341101] mmap_region+0x1f9/0x2660 [ 30.341674] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.342269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.343121] ? __pfx_lock_acquire+0x10/0x10 [ 30.343725] ? __pfx_mmap_region+0x10/0x10 [ 30.344331] ? security_mmap_addr+0x7d/0xa0 [ 30.344933] ? get_unmapped_area+0x1f5/0x3f0 [ 30.345576] do_mmap+0x854/0xf00 [ 30.346069] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.346639] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.347271] ksys_mmap_pgoff+0x3af/0x500 [ 30.347889] do_syscall_64+0x3f/0x90 [ 30.348531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.349422] RIP: 0033:0x7fe2c05efd82 [ 30.350029] 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 [ 30.352471] RSP: 002b:00007ffdadd91ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.353499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2c05efd82 [ 30.354449] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2bfa29000 [ 30.355382] RBP: 00007fe2bfa29000 R08: 0000000000000009 R09: 0000000000001000 [ 30.356322] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e794b6d90 [ 30.357324] R13: 00007ffdadd91bc0 R14: 00007ffdadd91bf0 R15: 00007ffdadd91f50 [ 30.358292] [ 30.358617] [ 30.358860] Allocated by task 216: [ 30.359338] kasan_save_stack+0x22/0x50 [ 30.359896] kasan_set_track+0x25/0x30 [ 30.360443] __kasan_slab_alloc+0x59/0x70 [ 30.361027] kmem_cache_alloc+0x16b/0x370 [ 30.361606] vm_area_dup+0x20/0x160 [ 30.362111] __split_vma+0x170/0x950 [ 30.362632] split_vma+0xc6/0x110 [ 30.363118] mprotect_fixup+0x8d2/0xb30 [ 30.363792] do_mprotect_pkey+0x87e/0xd40 [ 30.364485] __x64_sys_mprotect+0x78/0xc0 [ 30.365061] do_syscall_64+0x3f/0x90 [ 30.365608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.366342] [ 30.366594] Freed by task 216: [ 30.367049] kasan_save_stack+0x22/0x50 [ 30.367628] kasan_set_track+0x25/0x30 [ 30.368193] kasan_save_free_info+0x2b/0x50 [ 30.368869] __kasan_slab_free+0x10a/0x190 [ 30.369594] kmem_cache_free+0x10d/0x4d0 [ 30.370161] rcu_core+0x8c8/0x2860 [ 30.370654] __do_softirq+0x1b7/0x7d4 [ 30.371262] [ 30.371561] Last potentially related work creation: [ 30.372331] kasan_save_stack+0x22/0x50 [ 30.372941] __kasan_record_aux_stack+0x8e/0xa0 [ 30.373641] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.374399] remove_vma+0x139/0x170 [ 30.374939] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.375578] do_vmi_munmap+0x1f1/0x2b0 [ 30.376133] __vm_munmap+0x138/0x3a0 [ 30.376660] __x64_sys_munmap+0x59/0x80 [ 30.377223] do_syscall_64+0x3f/0x90 [ 30.377769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.378505] [ 30.378754] The buggy address belongs to the object at ffff88800c4e2570 [ 30.378754] which belongs to the cache vm_area_struct of size 168 [ 30.380414] The buggy address is located 88 bytes inside of [ 30.380414] freed 168-byte region [ffff88800c4e2570, ffff88800c4e2618) [ 30.382133] [ 30.382377] The buggy address belongs to the physical page: [ 30.383152] page:00000000d0f78ef3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4e2 [ 30.384387] memcg:ffff88800ec2f701 [ 30.384873] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.385698] page_type: 0xffffffff() [ 30.386223] raw: 0100000000000200 ffff8880087a0c80 ffffea00006817c0 dead000000000007 [ 30.387287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec2f701 [ 30.388407] page dumped because: kasan: bad access detected [ 30.389171] [ 30.389417] Memory state around the buggy address: [ 30.390076] ffff88800c4e2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.391148] ffff88800c4e2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.392187] >ffff88800c4e2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.393135] ^ [ 30.393881] ffff88800c4e2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.394826] ffff88800c4e2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.395904] ================================================================== [ 30.397158] Disabling lock debugging due to kernel taint [ 32.943692] BUG: Bad rss-counter state mm:00000000297dadf0 type:MM_FILEPAGES val:33 [ 32.944750] BUG: Bad rss-counter state mm:00000000297dadf0 type:MM_ANONPAGES val:22 [ 33.434709] BUG: Bad rss-counter state mm:00000000f3dd0969 type:MM_FILEPAGES val:33 [ 33.435858] BUG: Bad rss-counter state mm:00000000f3dd0969 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9428' (ECDSA) to the list of known hosts. 2023/06/20 15:53:42 fuzzer started 2023/06/20 15:53:42 dialing manager at localhost:36067 2023/06/20 15:53:42 checking machine... 2023/06/20 15:53:42 checking revisions... [ 34.157014] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:53:42 testing simple program... [ 34.206067] cgroup: Unknown subsys name 'net' [ 34.273036] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe57194bba0 CR3=000000000ee18000 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=3e68cae3c68e068f92475709149e318a XMM02=000000000011a538eff9b2d0a8fce9cb XMM03=000000000011a6082c67c8bc2e329bc3 XMM04=d599c82db270ebe100000000000ae988 XMM05=e4e649ef626a6e870000000000132a60 XMM06=5a9d233068761c4a00000000001318c0 XMM07=fb795ef6d65770560000000000121a48 XMM08=2c67c8bc2e329bc3000000000011a5a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81810aa0 RBX=ffffffff85dfe994 RCX=ffffffff81810a08 RDX=0000000000000000 RSI=ffffffff86139ca2 RDI=ffffffff85dfe980 RBP=ffffffff85dfe980 RSP=ffff888009467738 R8 =ffffffff86139ca2 R9 =ffff888009467830 R10=0000000000038001 R11=0000000000020fef R12=ffffffff85dfe990 R13=ffffffff85dfe980 R14=ffffffff85dfe980 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000283 [--S---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 00007f630b5ed900 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=00007f630bba50b0 CR3=0000000015bf6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000