syzkaller login: [ 30.288296] BUG: Bad rss-counter state mm:00000000ddd1725a type:MM_FILEPAGES val:33 [ 30.289016] BUG: Bad rss-counter state mm:00000000ddd1725a type:MM_ANONPAGES val:22 [ 30.381529] ================================================================== [ 30.382258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.382935] Read of size 8 at addr ffff88801a1775c8 by task sshd/221 [ 30.383486] [ 30.383642] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.384246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.384944] Call Trace: [ 30.385174] [ 30.385377] dump_stack_lvl+0x91/0xf0 [ 30.385952] print_report+0xcc/0x620 [ 30.386342] ? __virt_addr_valid+0x102/0x340 [ 30.386784] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.387224] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.387686] kasan_report+0xbe/0xf0 [ 30.388026] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.388484] vma_interval_tree_remove+0xc75/0xec0 [ 30.388921] vma_prepare+0xc54/0x11a0 [ 30.389267] __split_vma+0x5af/0x950 [ 30.389607] ? __pfx___split_vma+0x10/0x10 [ 30.389988] ? find_held_lock+0x2c/0x110 [ 30.390395] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.390803] ? lock_is_held_type+0x9f/0x120 [ 30.391193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.391639] ? mtree_range_walk+0x632/0x900 [ 30.392037] ? mas_walk+0x5c7/0x7c0 [ 30.392380] do_vmi_munmap+0x1f1/0x2b0 [ 30.392743] mmap_region+0x1f9/0x2660 [ 30.393089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.393463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.393984] ? __pfx_lock_acquire+0x10/0x10 [ 30.394407] ? __pfx_mmap_region+0x10/0x10 [ 30.394787] ? security_mmap_addr+0x7d/0xa0 [ 30.395173] ? get_unmapped_area+0x1f5/0x3f0 [ 30.395576] do_mmap+0x854/0xf00 [ 30.395896] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.396250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.396663] ksys_mmap_pgoff+0x3af/0x500 [ 30.397038] do_syscall_64+0x3f/0x90 [ 30.397393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.397877] RIP: 0033:0x7f8986a03d82 [ 30.398253] 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 [ 30.399767] RSP: 002b:00007ffe2423fcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.400428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8986a03d82 [ 30.401044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8985e3d000 [ 30.401651] RBP: 00007f8985e3d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.402289] R10: 0000000000000812 R11: 0000000000000206 R12: 000056242154aec0 [ 30.402898] R13: 00007ffe2423fce0 R14: 00007ffe2423fd10 R15: 00007ffe24240070 [ 30.403521] [ 30.403734] [ 30.403893] Allocated by task 214: [ 30.404202] kasan_save_stack+0x22/0x50 [ 30.404575] kasan_set_track+0x25/0x30 [ 30.404930] __kasan_slab_alloc+0x59/0x70 [ 30.405308] kmem_cache_alloc+0x16b/0x370 [ 30.405689] vm_area_dup+0x20/0x160 [ 30.406035] __split_vma+0x170/0x950 [ 30.406368] split_vma+0xc6/0x110 [ 30.406680] mprotect_fixup+0x8d2/0xb30 [ 30.407034] do_mprotect_pkey+0x87e/0xd40 [ 30.407411] __x64_sys_mprotect+0x78/0xc0 [ 30.407788] do_syscall_64+0x3f/0x90 [ 30.408128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.408589] [ 30.408744] Freed by task 214: [ 30.409027] kasan_save_stack+0x22/0x50 [ 30.409393] kasan_set_track+0x25/0x30 [ 30.409745] kasan_save_free_info+0x2b/0x50 [ 30.410158] __kasan_slab_free+0x10a/0x190 [ 30.410570] kmem_cache_free+0x10d/0x4d0 [ 30.410966] rcu_core+0x8c8/0x2860 [ 30.412183] __do_softirq+0x1b7/0x7d4 [ 30.413125] [ 30.413526] Last potentially related work creation: [ 30.414761] kasan_save_stack+0x22/0x50 [ 30.415745] __kasan_record_aux_stack+0x8e/0xa0 [ 30.416886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.418193] remove_vma+0x139/0x170 [ 30.419079] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.420213] do_vmi_munmap+0x1f1/0x2b0 [ 30.421179] __vm_munmap+0x138/0x3a0 [ 30.422115] __x64_sys_munmap+0x59/0x80 [ 30.423120] do_syscall_64+0x3f/0x90 [ 30.424056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.425335] [ 30.425730] The buggy address belongs to the object at ffff88801a177570 [ 30.425730] which belongs to the cache vm_area_struct of size 168 [ 30.429010] The buggy address is located 88 bytes inside of [ 30.429010] freed 168-byte region [ffff88801a177570, ffff88801a177618) [ 30.431986] [ 30.432142] The buggy address belongs to the physical page: [ 30.432612] page:00000000869cdcf0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a177 [ 30.433388] memcg:ffff888016a78f01 [ 30.433699] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.434198] page_type: 0xffffffff() [ 30.434517] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.435163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a78f01 [ 30.435817] page dumped because: kasan: bad access detected [ 30.436289] [ 30.436448] Memory state around the buggy address: [ 30.436865] ffff88801a177480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.437474] ffff88801a177500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.438106] >ffff88801a177580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.438713] ^ [ 30.439193] ffff88801a177600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.439808] ffff88801a177680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.440418] ================================================================== [ 30.441226] Disabling lock debugging due to kernel taint [ 32.563691] BUG: Bad rss-counter state mm:0000000075a588d4 type:MM_FILEPAGES val:33 [ 32.564460] BUG: Bad rss-counter state mm:0000000075a588d4 type:MM_ANONPAGES val:22 [ 32.868635] BUG: Bad rss-counter state mm:000000003548aaaa type:MM_FILEPAGES val:33 [ 32.869366] BUG: Bad rss-counter state mm:000000003548aaaa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17555' (ECDSA) to the list of known hosts. 2023/06/21 08:38:50 fuzzer started 2023/06/21 08:38:50 dialing manager at localhost:36067 2023/06/21 08:38:50 checking machine... 2023/06/21 08:38:50 checking revisions... [ 33.450979] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:38:50 testing simple program... [ 33.499293] cgroup: Unknown subsys name 'net' [ 33.534098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:38:50 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=ffff888008e50000 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=00007f4b7a471000 CR3=0000000016ba8000 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=2030353a38333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a38333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000e RBX=00005645366dd630 RCX=0000000000000000 RDX=0000000000000002 RSI=00007ffce76d4590 RDI=00005645366dd330 RBP=00007ffce76d4690 RSP=00007ffce76d4420 R8 =00005645366dd320 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=0000000000000023 R13=0000000000000023 R14=0000000000000020 R15=0000000000000000 RIP=00007f666e8a4d66 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f666dd19900 00000000 00000000 GS =0000 0000000000000000 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=00007f666dcd2008 CR3=000000000ffa2000 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