syzkaller login: [ 34.120914] BUG: Bad rss-counter state mm:000000009597b76e type:MM_FILEPAGES val:33 [ 34.121960] BUG: Bad rss-counter state mm:000000009597b76e type:MM_ANONPAGES val:22 [ 34.285184] ================================================================== [ 34.286291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.287482] Read of size 8 at addr ffff88800f140140 by task sshd/219 [ 34.288385] [ 34.288637] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.289673] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.290809] Call Trace: [ 34.291176] [ 34.291510] dump_stack_lvl+0x91/0xf0 [ 34.292079] print_report+0xcc/0x620 [ 34.292646] ? __virt_addr_valid+0x102/0x340 [ 34.293282] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.294032] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.294769] kasan_report+0xbe/0xf0 [ 34.295338] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.296087] vma_interval_tree_remove+0xc75/0xec0 [ 34.296811] vma_prepare+0xc54/0x11a0 [ 34.297396] __split_vma+0x5af/0x950 [ 34.297976] ? __pfx___split_vma+0x10/0x10 [ 34.298618] ? find_held_lock+0x2c/0x110 [ 34.299241] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.299911] ? lock_is_held_type+0x9f/0x120 [ 34.300558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.301283] ? mtree_range_walk+0x632/0x900 [ 34.301972] ? mas_walk+0x5c7/0x7c0 [ 34.302536] do_vmi_munmap+0x1f1/0x2b0 [ 34.303127] mmap_region+0x1f9/0x2660 [ 34.303694] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.304302] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.305158] ? __pfx_lock_acquire+0x10/0x10 [ 34.305843] ? __pfx_mmap_region+0x10/0x10 [ 34.306484] ? security_mmap_addr+0x7d/0xa0 [ 34.307111] ? get_unmapped_area+0x1f5/0x3f0 [ 34.307768] do_mmap+0x854/0xf00 [ 34.308292] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.308877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.309545] ksys_mmap_pgoff+0x3af/0x500 [ 34.310162] do_syscall_64+0x3f/0x90 [ 34.310728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.311502] RIP: 0033:0x7fa358c16d82 [ 34.312045] 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 [ 34.314602] RSP: 002b:00007ffff9659718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.315674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa358c16d82 [ 34.316685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa358050000 [ 34.317711] RBP: 00007fa358050000 R08: 0000000000000009 R09: 0000000000001000 [ 34.318722] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560758cb7f70 [ 34.319734] R13: 00007ffff9659730 R14: 00007ffff9659760 R15: 00007ffff9659ac0 [ 34.320753] [ 34.321101] [ 34.321355] Allocated by task 212: [ 34.321872] kasan_save_stack+0x22/0x50 [ 34.322479] kasan_set_track+0x25/0x30 [ 34.323065] __kasan_slab_alloc+0x59/0x70 [ 34.323690] kmem_cache_alloc+0x16b/0x370 [ 34.324304] vm_area_dup+0x20/0x160 [ 34.324845] __split_vma+0x170/0x950 [ 34.325397] split_vma+0xc6/0x110 [ 34.325936] mprotect_fixup+0x8d2/0xb30 [ 34.326531] do_mprotect_pkey+0x87e/0xd40 [ 34.327152] __x64_sys_mprotect+0x78/0xc0 [ 34.327775] do_syscall_64+0x3f/0x90 [ 34.328340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.329103] [ 34.329359] Freed by task 212: [ 34.329839] kasan_save_stack+0x22/0x50 [ 34.330444] kasan_set_track+0x25/0x30 [ 34.331034] kasan_save_free_info+0x2b/0x50 [ 34.331670] __kasan_slab_free+0x10a/0x190 [ 34.332308] kmem_cache_free+0x10d/0x4d0 [ 34.332915] rcu_core+0x8c8/0x2860 [ 34.333443] __do_softirq+0x1b7/0x7d4 [ 34.334003] [ 34.334261] Last potentially related work creation: [ 34.334947] kasan_save_stack+0x22/0x50 [ 34.335545] __kasan_record_aux_stack+0x8e/0xa0 [ 34.336216] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.336973] remove_vma+0x139/0x170 [ 34.337508] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.338185] do_vmi_munmap+0x1f1/0x2b0 [ 34.338757] __vm_munmap+0x138/0x3a0 [ 34.339312] __x64_sys_munmap+0x59/0x80 [ 34.339895] do_syscall_64+0x3f/0x90 [ 34.340461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.341217] [ 34.341472] The buggy address belongs to the object at ffff88800f1400e8 [ 34.341472] which belongs to the cache vm_area_struct of size 168 [ 34.343218] The buggy address is located 88 bytes inside of [ 34.343218] freed 168-byte region [ffff88800f1400e8, ffff88800f140190) [ 34.344885] [ 34.345137] The buggy address belongs to the physical page: [ 34.345938] page:0000000067a9ae8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf140 [ 34.347212] memcg:ffff8880187f5701 [ 34.347712] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.348475] page_type: 0xffffffff() [ 34.349007] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.350105] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880187f5701 [ 34.351175] page dumped because: kasan: bad access detected [ 34.351956] [ 34.352211] Memory state around the buggy address: [ 34.352894] ffff88800f140000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.353914] ffff88800f140080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 34.354928] >ffff88800f140100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.355938] ^ [ 34.356693] ffff88800f140180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.357716] ffff88800f140200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.358726] ================================================================== [ 34.359936] Disabling lock debugging due to kernel taint [ 36.402324] BUG: Bad rss-counter state mm:0000000043ea9a80 type:MM_FILEPAGES val:33 [ 36.403545] BUG: Bad rss-counter state mm:0000000043ea9a80 type:MM_ANONPAGES val:22 [ 36.905525] BUG: Bad rss-counter state mm:00000000edaccf44 type:MM_FILEPAGES val:33 [ 36.906874] BUG: Bad rss-counter state mm:00000000edaccf44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29749' (ECDSA) to the list of known hosts. 2023/06/19 17:04:24 fuzzer started 2023/06/19 17:04:24 dialing manager at localhost:44161 2023/06/19 17:04:24 checking machine... 2023/06/19 17:04:24 checking revisions... [ 37.667683] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:04:24 testing simple program... [ 37.713672] cgroup: Unknown subsys name 'net' [ 37.774628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015c6f7a0 RCX=0000000000000001 RDX=1ffff11002b8def5 RSI=ffff888015c6ff10 RDI=ffff888015c6f7a8 RBP=ffff888015c6ff10 RSP=ffff888015c6f6f8 R8 =0000000000000001 R9 =ffff888015c6f7e0 R10=0000000000038001 R11=000000000002244e R12=0000000000000008 R13=ffff888015c6f7e8 R14=ffff888015c6ff10 R15=ffff888015c6f7a0 RIP=ffffffff81130445 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 00007f3b61c48900 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=00005585b4f4f748 CR3=000000000c73a000 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=d07d2ebd82beb16e00000000000ae988 XMM05=facbee8188754b410000000000134bf8 XMM06=806171799158d9670000000000133c98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b0249 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff864b0248 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =1ffffffff0c96049 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800fdcff58 R15=ffff88806cf09a98 RIP=ffffffff811311d7 RFL=00000212 [----A--] 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 00007f90c5fd5900 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=00007f90c658d0b0 CR3=000000000e21e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000