syzkaller login: [ 30.882666] BUG: Bad rss-counter state mm:000000007aafed5b type:MM_FILEPAGES val:33 [ 30.885046] BUG: Bad rss-counter state mm:000000007aafed5b type:MM_ANONPAGES val:22 [ 31.057950] ================================================================== [ 31.058973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.059942] Read of size 8 at addr ffff888019744df0 by task sshd/219 [ 31.060943] [ 31.061167] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.062077] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.063096] Call Trace: [ 31.063427] [ 31.063764] dump_stack_lvl+0x91/0xf0 [ 31.064313] print_report+0xcc/0x620 [ 31.064842] ? __virt_addr_valid+0x102/0x340 [ 31.065426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.066073] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.066725] kasan_report+0xbe/0xf0 [ 31.067263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.067921] vma_interval_tree_remove+0xc75/0xec0 [ 31.068554] vma_prepare+0xc54/0x11a0 [ 31.069059] __split_vma+0x5af/0x950 [ 31.069558] ? __pfx___split_vma+0x10/0x10 [ 31.070114] ? find_held_lock+0x2c/0x110 [ 31.070672] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.071313] ? lock_is_held_type+0x9f/0x120 [ 31.071903] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.072570] ? mtree_range_walk+0x632/0x900 [ 31.073158] ? mas_walk+0x5c7/0x7c0 [ 31.073673] do_vmi_munmap+0x1f1/0x2b0 [ 31.074213] mmap_region+0x1f9/0x2660 [ 31.074756] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.075301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.076055] ? __pfx_lock_acquire+0x10/0x10 [ 31.076620] ? __pfx_mmap_region+0x10/0x10 [ 31.077182] ? security_mmap_addr+0x7d/0xa0 [ 31.077745] ? get_unmapped_area+0x1f5/0x3f0 [ 31.078325] do_mmap+0x854/0xf00 [ 31.078799] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.079326] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.079924] ksys_mmap_pgoff+0x3af/0x500 [ 31.080465] do_syscall_64+0x3f/0x90 [ 31.080975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081656] RIP: 0033:0x7fe51c550d82 [ 31.082144] 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 [ 31.084393] RSP: 002b:00007ffcf9b55248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.085355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe51c550d82 [ 31.086249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe51b98a000 [ 31.087160] RBP: 00007fe51b98a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.088051] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cecd801ec0 [ 31.088944] R13: 00007ffcf9b55260 R14: 00007ffcf9b55290 R15: 00007ffcf9b555f0 [ 31.089845] [ 31.090152] [ 31.090379] Allocated by task 212: [ 31.090837] kasan_save_stack+0x22/0x50 [ 31.091366] kasan_set_track+0x25/0x30 [ 31.091892] __kasan_slab_alloc+0x59/0x70 [ 31.092444] kmem_cache_alloc+0x16b/0x370 [ 31.092987] vm_area_dup+0x20/0x160 [ 31.093469] __split_vma+0x170/0x950 [ 31.093966] split_vma+0xc6/0x110 [ 31.094429] mprotect_fixup+0x8d2/0xb30 [ 31.094979] do_mprotect_pkey+0x87e/0xd40 [ 31.095528] __x64_sys_mprotect+0x78/0xc0 [ 31.096074] do_syscall_64+0x3f/0x90 [ 31.096572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.097251] [ 31.097477] Freed by task 212: [ 31.097889] kasan_save_stack+0x22/0x50 [ 31.098421] kasan_set_track+0x25/0x30 [ 31.098944] kasan_save_free_info+0x2b/0x50 [ 31.099505] __kasan_slab_free+0x10a/0x190 [ 31.100061] kmem_cache_free+0x10d/0x4d0 [ 31.100594] rcu_core+0x8c8/0x2860 [ 31.101058] __do_softirq+0x1b7/0x7d4 [ 31.101563] [ 31.101793] Last potentially related work creation: [ 31.102404] kasan_save_stack+0x22/0x50 [ 31.102955] __kasan_record_aux_stack+0x8e/0xa0 [ 31.103563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.104238] remove_vma+0x139/0x170 [ 31.104715] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.105299] do_vmi_munmap+0x1f1/0x2b0 [ 31.105810] __vm_munmap+0x138/0x3a0 [ 31.106296] __x64_sys_munmap+0x59/0x80 [ 31.106839] do_syscall_64+0x3f/0x90 [ 31.107346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.108028] [ 31.108257] The buggy address belongs to the object at ffff888019744d98 [ 31.108257] which belongs to the cache vm_area_struct of size 168 [ 31.109804] The buggy address is located 88 bytes inside of [ 31.109804] freed 168-byte region [ffff888019744d98, ffff888019744e40) [ 31.111285] [ 31.111511] The buggy address belongs to the physical page: [ 31.112207] page:00000000fe8c4e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19744 [ 31.113355] memcg:ffff8880166ea601 [ 31.113803] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.114477] page_type: 0xffffffff() [ 31.114955] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.115923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166ea601 [ 31.116881] page dumped because: kasan: bad access detected [ 31.117582] [ 31.117808] Memory state around the buggy address: [ 31.118420] ffff888019744c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.119356] ffff888019744d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.120272] >ffff888019744d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.121171] ^ [ 31.122025] ffff888019744e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.122937] ffff888019744e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.123830] ================================================================== [ 31.125278] Disabling lock debugging due to kernel taint [ 33.049575] BUG: Bad rss-counter state mm:00000000561c4351 type:MM_FILEPAGES val:33 [ 33.050832] BUG: Bad rss-counter state mm:00000000561c4351 type:MM_ANONPAGES val:22 [ 33.531811] BUG: Bad rss-counter state mm:00000000a2876c05 type:MM_FILEPAGES val:33 [ 33.532838] BUG: Bad rss-counter state mm:00000000a2876c05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39988' (ECDSA) to the list of known hosts. 2023/06/21 03:13:30 fuzzer started 2023/06/21 03:13:31 dialing manager at localhost:36067 2023/06/21 03:13:31 checking machine... 2023/06/21 03:13:31 checking revisions... [ 34.284996] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:13:31 testing simple program... [ 34.327253] cgroup: Unknown subsys name 'net' [ 34.377622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:13:30 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800cb30501 RCX=0000000000000000 RDX=0000000000000004 RSI=ffffffff8363329f RDI=ffff88800cb306b0 RBP=ffff88800cb30500 RSP=ffff8880198e7dd0 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800cb30500 R11=0000000000000000 R12=ffff8880198e7e40 R13=ffff8880198e7e50 R14=0000000000000001 R15=ffff88800893dc00 RIP=ffffffff814c0860 RFL=00000297 [--S-APC] 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 00007ff88e1a0700 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=00007ffd2b65f498 CR3=000000001738c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732030333a3331 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363230 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff8880147c7b50 RSI=ffff8880147c7b18 RDI=ffff8880147c76e0 RBP=ffff8880147c7768 RSP=ffff8880147c76d0 R8 =0000000000000001 R9 =ffff8880147c7710 R10=0000000000038001 R11=000000000008b7d7 R12=ffff8880147c7798 R13=0000000000000000 R14=ffff8880173751c0 R15=0000000000000024 RIP=ffffffff810bd057 RFL=00000282 [--S----] 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 00007f60e2a7d900 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=00007fff10098000 CR3=000000000dbb4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000