syzkaller login: [ 35.674938] BUG: Bad rss-counter state mm:00000000c3937c6b type:MM_FILEPAGES val:33 [ 35.676176] BUG: Bad rss-counter state mm:00000000c3937c6b type:MM_ANONPAGES val:22 [ 35.844790] ================================================================== [ 35.845852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.846946] Read of size 8 at addr ffff888015d6fd08 by task sshd/226 [ 35.848012] [ 35.848273] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.849270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.850486] Call Trace: [ 35.850880] [ 35.851222] dump_stack_lvl+0x91/0xf0 [ 35.851833] print_report+0xcc/0x620 [ 35.852406] ? __virt_addr_valid+0x102/0x340 [ 35.853074] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.853804] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.854566] kasan_report+0xbe/0xf0 [ 35.855155] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.855937] vma_interval_tree_remove+0xc75/0xec0 [ 35.856679] vma_prepare+0xc54/0x11a0 [ 35.857267] __split_vma+0x5af/0x950 [ 35.857842] ? __pfx___split_vma+0x10/0x10 [ 35.858481] ? find_held_lock+0x2c/0x110 [ 35.859128] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.859852] ? lock_is_held_type+0x9f/0x120 [ 35.860402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.861003] ? mtree_range_walk+0x632/0x900 [ 35.861564] ? mas_walk+0x5c7/0x7c0 [ 35.862034] do_vmi_munmap+0x1f1/0x2b0 [ 35.862525] mmap_region+0x1f9/0x2660 [ 35.863007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.863531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.864253] ? __pfx_lock_acquire+0x10/0x10 [ 35.864792] ? __pfx_mmap_region+0x10/0x10 [ 35.865312] ? security_mmap_addr+0x7d/0xa0 [ 35.865848] ? get_unmapped_area+0x1f5/0x3f0 [ 35.866394] do_mmap+0x854/0xf00 [ 35.866838] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.867342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.867895] ksys_mmap_pgoff+0x3af/0x500 [ 35.868404] do_syscall_64+0x3f/0x90 [ 35.868885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.869530] RIP: 0033:0x7f82fe6b2d82 [ 35.869984] 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 [ 35.872133] RSP: 002b:00007ffd4f5bae98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.873035] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82fe6b2d82 [ 35.873884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82fdaec000 [ 35.874731] RBP: 00007f82fdaec000 R08: 0000000000000009 R09: 0000000000001000 [ 35.875591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8fc6dbec0 [ 35.876436] R13: 00007ffd4f5baeb0 R14: 00007ffd4f5baee0 R15: 00007ffd4f5bb240 [ 35.877282] [ 35.877570] [ 35.877784] Allocated by task 219: [ 35.878214] kasan_save_stack+0x22/0x50 [ 35.878715] kasan_set_track+0x25/0x30 [ 35.879218] __kasan_slab_alloc+0x59/0x70 [ 35.879760] kmem_cache_alloc+0x16b/0x370 [ 35.880283] vm_area_dup+0x20/0x160 [ 35.880735] __split_vma+0x170/0x950 [ 35.881204] split_vma+0xc6/0x110 [ 35.881640] mprotect_fixup+0x8d2/0xb30 [ 35.882149] do_mprotect_pkey+0x87e/0xd40 [ 35.882676] __x64_sys_mprotect+0x78/0xc0 [ 35.883190] do_syscall_64+0x3f/0x90 [ 35.883671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.884312] [ 35.884529] Freed by task 219: [ 35.884925] kasan_save_stack+0x22/0x50 [ 35.885433] kasan_set_track+0x25/0x30 [ 35.885931] kasan_save_free_info+0x2b/0x50 [ 35.886469] __kasan_slab_free+0x10a/0x190 [ 35.887000] kmem_cache_free+0x10d/0x4d0 [ 35.887521] rcu_core+0x8c8/0x2860 [ 35.887970] __do_softirq+0x1b7/0x7d4 [ 35.888503] [ 35.888758] Last potentially related work creation: [ 35.889338] kasan_save_stack+0x22/0x50 [ 35.889841] __kasan_record_aux_stack+0x8e/0xa0 [ 35.890416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.891059] remove_vma+0x139/0x170 [ 35.891527] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.892096] do_vmi_munmap+0x1f1/0x2b0 [ 35.892577] __vm_munmap+0x138/0x3a0 [ 35.893046] __x64_sys_munmap+0x59/0x80 [ 35.893545] do_syscall_64+0x3f/0x90 [ 35.894012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.894660] [ 35.894873] The buggy address belongs to the object at ffff888015d6fcb0 [ 35.894873] which belongs to the cache vm_area_struct of size 168 [ 35.896356] The buggy address is located 88 bytes inside of [ 35.896356] freed 168-byte region [ffff888015d6fcb0, ffff888015d6fd58) [ 35.897758] [ 35.897977] The buggy address belongs to the physical page: [ 35.898637] page:0000000037f1637c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d6f [ 35.899749] memcg:ffff888018c15d01 [ 35.900175] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.900866] page_type: 0xffffffff() [ 35.901317] raw: 0100000000000200 ffff8880087a0c80 ffffea000057cb00 dead000000000007 [ 35.902233] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c15d01 [ 35.903137] page dumped because: kasan: bad access detected [ 35.903801] [ 35.904021] Memory state around the buggy address: [ 35.904604] ffff888015d6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 35.905457] ffff888015d6fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.906316] >ffff888015d6fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.907166] ^ [ 35.907627] ffff888015d6fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.908480] ffff888015d6fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.909335] ================================================================== [ 35.910320] Disabling lock debugging due to kernel taint [ 37.779624] BUG: Bad rss-counter state mm:000000007e1fca79 type:MM_FILEPAGES val:33 [ 37.780842] BUG: Bad rss-counter state mm:000000007e1fca79 type:MM_ANONPAGES val:22 [ 38.220657] BUG: Bad rss-counter state mm:00000000cdb89a65 type:MM_FILEPAGES val:33 [ 38.222136] BUG: Bad rss-counter state mm:00000000cdb89a65 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23964' (ECDSA) to the list of known hosts. 2023/06/21 01:27:20 fuzzer started 2023/06/21 01:27:21 dialing manager at localhost:36067 2023/06/21 01:27:21 checking machine... 2023/06/21 01:27:21 checking revisions... [ 38.919065] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:27:21 testing simple program... [ 38.968595] cgroup: Unknown subsys name 'net' [ 39.006545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:27:20 Registers: info registers vcpu 0 RAX=0000000004410009 RBX=ffff88801a06df30 RCX=ffff88801a06d000 RDX=0000000000000080 RSI=ffff88801a06de40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888008d9fc80 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea00003bfa00 R14=ffffffff8186b835 R15=ffff88800f302c00 RIP=ffffffff8180eff0 RFL=00000286 [--S--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 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=00007f058a81c650 CR3=000000000f70e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008c15ca0 RCX=0000000000000000 RDX=ffff88801467b680 RSI=ffffffff818f77e3 RDI=ffff888008c15c80 RBP=0000000000000000 RSP=ffff8880147bfa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888008c15c80 R13=dffffc0000000000 R14=0000000000000001 R15=ffff8880147bfdf0 RIP=ffffffff818f6c20 RFL=00000293 [--S-A-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 00007fcfa3a1b900 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=00007fcfa2ea47a0 CR3=000000000cfb0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=62e9da14f452638b00000000000ae988 XMM05=3046da988adbc3a800000000001329d0 XMM06=13e856d8d71426c80000000000131450 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000