syzkaller login: [ 38.872317] BUG: Bad rss-counter state mm:00000000cc127725 type:MM_FILEPAGES val:33 [ 38.873742] BUG: Bad rss-counter state mm:00000000cc127725 type:MM_ANONPAGES val:22 [ 38.927203] ================================================================== [ 38.928110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.929179] Read of size 8 at addr ffff88800e6cda50 by task sshd/220 [ 38.929936] [ 38.930157] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.931027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.932032] Call Trace: [ 38.932356] [ 38.932645] dump_stack_lvl+0x91/0xf0 [ 38.933132] print_report+0xcc/0x620 [ 38.933615] ? __virt_addr_valid+0x102/0x340 [ 38.934184] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.934820] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.935472] kasan_report+0xbe/0xf0 [ 38.935969] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.936612] vma_interval_tree_remove+0xc75/0xec0 [ 38.937240] vma_prepare+0xc54/0x11a0 [ 38.937737] __split_vma+0x5af/0x950 [ 38.938220] ? __pfx___split_vma+0x10/0x10 [ 38.938770] ? find_held_lock+0x2c/0x110 [ 38.939332] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.939911] ? lock_is_held_type+0x9f/0x120 [ 38.940472] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.941106] ? mtree_range_walk+0x632/0x900 [ 38.941684] ? mas_walk+0x5c7/0x7c0 [ 38.942181] do_vmi_munmap+0x1f1/0x2b0 [ 38.942696] mmap_region+0x1f9/0x2660 [ 38.943212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.943741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.944467] ? __pfx_lock_acquire+0x10/0x10 [ 38.945027] ? __pfx_mmap_region+0x10/0x10 [ 38.945569] ? security_mmap_addr+0x7d/0xa0 [ 38.946124] ? get_unmapped_area+0x1f5/0x3f0 [ 38.946695] do_mmap+0x854/0xf00 [ 38.947152] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.948252] ksys_mmap_pgoff+0x3af/0x500 [ 38.948781] do_syscall_64+0x3f/0x90 [ 38.949279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949958] RIP: 0033:0x7f6dce383d82 [ 38.950432] 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 [ 38.952671] RSP: 002b:00007ffd6ae308a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.953620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6dce383d82 [ 38.954495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6dcd7bd000 [ 38.955392] RBP: 00007f6dcd7bd000 R08: 0000000000000009 R09: 0000000000001000 [ 38.956282] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563005ec9d90 [ 38.957161] R13: 00007ffd6ae308c0 R14: 00007ffd6ae308f0 R15: 00007ffd6ae30c50 [ 38.958041] [ 38.958346] [ 38.958569] Allocated by task 213: [ 38.959030] kasan_save_stack+0x22/0x50 [ 38.959551] kasan_set_track+0x25/0x30 [ 38.960066] __kasan_slab_alloc+0x59/0x70 [ 38.960610] kmem_cache_alloc+0x16b/0x370 [ 38.961146] vm_area_dup+0x20/0x160 [ 38.961621] __split_vma+0x170/0x950 [ 38.962097] split_vma+0xc6/0x110 [ 38.962551] mprotect_fixup+0x8d2/0xb30 [ 38.963080] do_mprotect_pkey+0x87e/0xd40 [ 38.963620] __x64_sys_mprotect+0x78/0xc0 [ 38.964161] do_syscall_64+0x3f/0x90 [ 38.964656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.965331] [ 38.965550] Freed by task 213: [ 38.965956] kasan_save_stack+0x22/0x50 [ 38.966481] kasan_set_track+0x25/0x30 [ 38.967006] kasan_save_free_info+0x2b/0x50 [ 38.967564] __kasan_slab_free+0x10a/0x190 [ 38.968118] kmem_cache_free+0x10d/0x4d0 [ 38.968664] rcu_core+0x8c8/0x2860 [ 38.969145] __do_softirq+0x1b7/0x7d4 [ 38.969653] [ 38.969875] Last potentially related work creation: [ 38.970498] kasan_save_stack+0x22/0x50 [ 38.971043] __kasan_record_aux_stack+0x8e/0xa0 [ 38.971660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.972323] remove_vma+0x139/0x170 [ 38.972792] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.973378] do_vmi_munmap+0x1f1/0x2b0 [ 38.973894] __vm_munmap+0x138/0x3a0 [ 38.974382] __x64_sys_munmap+0x59/0x80 [ 38.974906] do_syscall_64+0x3f/0x90 [ 38.975395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.976056] [ 38.976279] Second to last potentially related work creation: [ 38.976992] kasan_save_stack+0x22/0x50 [ 38.977529] __kasan_record_aux_stack+0x8e/0xa0 [ 38.978144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.978831] remove_vma+0x139/0x170 [ 38.979323] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.979908] do_vmi_munmap+0x1f1/0x2b0 [ 38.980427] mmap_region+0x1f9/0x2660 [ 38.980927] do_mmap+0x854/0xf00 [ 38.981379] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.981884] ksys_mmap_pgoff+0x3af/0x500 [ 38.982407] do_syscall_64+0x3f/0x90 [ 38.982907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.983579] [ 38.983803] The buggy address belongs to the object at ffff88800e6cd9f8 [ 38.983803] which belongs to the cache vm_area_struct of size 168 [ 38.985366] The buggy address is located 88 bytes inside of [ 38.985366] freed 168-byte region [ffff88800e6cd9f8, ffff88800e6cdaa0) [ 38.986894] [ 38.987120] The buggy address belongs to the physical page: [ 38.987815] page:000000000c3e974a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6cd [ 38.988972] memcg:ffff88800e440801 [ 38.989426] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.990101] page_type: 0xffffffff() [ 38.990583] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ca80 dead000000000008 [ 38.991563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e440801 [ 38.992522] page dumped because: kasan: bad access detected [ 38.993230] [ 38.993449] Memory state around the buggy address: [ 38.994055] ffff88800e6cd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.994980] ffff88800e6cd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.995892] >ffff88800e6cda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.996786] ^ [ 38.997519] ffff88800e6cda80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.998418] ffff88800e6cdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.999329] ================================================================== [ 39.000360] Disabling lock debugging due to kernel taint [ 40.867586] BUG: Bad rss-counter state mm:00000000d4e1952f type:MM_FILEPAGES val:33 [ 40.869125] BUG: Bad rss-counter state mm:00000000d4e1952f type:MM_ANONPAGES val:22 [ 41.339163] BUG: Bad rss-counter state mm:000000001ef0a2dd type:MM_FILEPAGES val:33 [ 41.340272] BUG: Bad rss-counter state mm:000000001ef0a2dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8581' (ECDSA) to the list of known hosts. 2023/06/21 02:54:07 fuzzer started 2023/06/21 02:54:07 dialing manager at localhost:36067 2023/06/21 02:54:07 checking machine... 2023/06/21 02:54:07 checking revisions... [ 42.104947] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:54:07 testing simple program... [ 42.154020] cgroup: Unknown subsys name 'net' [ 42.206664] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:54:07 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000001255 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8171b3d3 RBP=ffff88800a05e000 RSP=ffff88800f437e70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=000055c54fc4ef88 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff845118ab 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 00007f7b52c1e900 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=000055c54fc4ef88 CR3=0000000018c0c000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 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=ffff888008c04400 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=00007ffe809d97d8 CR3=000000000cbf8000 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=34353a3230203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036303a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000