syzkaller login: [ 41.381653] BUG: Bad rss-counter state mm:00000000a8d4aff3 type:MM_FILEPAGES val:33 [ 41.384196] BUG: Bad rss-counter state mm:00000000a8d4aff3 type:MM_ANONPAGES val:22 [ 41.568982] ================================================================== [ 41.569857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.570729] Read of size 8 at addr ffff88800e8884e0 by task sshd/222 [ 41.571560] [ 41.571772] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.572572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.573500] Call Trace: [ 41.573803] [ 41.574069] dump_stack_lvl+0x91/0xf0 [ 41.574531] print_report+0xcc/0x620 [ 41.574984] ? __virt_addr_valid+0x102/0x340 [ 41.575502] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.576075] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.576650] kasan_report+0xbe/0xf0 [ 41.577099] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.577716] vma_interval_tree_remove+0xc75/0xec0 [ 41.578286] vma_prepare+0xc54/0x11a0 [ 41.578751] __split_vma+0x5af/0x950 [ 41.579202] ? __pfx___split_vma+0x10/0x10 [ 41.579713] ? find_held_lock+0x2c/0x110 [ 41.580214] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.580755] ? lock_is_held_type+0x9f/0x120 [ 41.581275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.581869] ? mtree_range_walk+0x632/0x900 [ 41.582399] ? mas_walk+0x5c7/0x7c0 [ 41.582854] do_vmi_munmap+0x1f1/0x2b0 [ 41.583326] mmap_region+0x1f9/0x2660 [ 41.583784] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.584279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.584967] ? __pfx_lock_acquire+0x10/0x10 [ 41.585497] ? __pfx_mmap_region+0x10/0x10 [ 41.586009] ? security_mmap_addr+0x7d/0xa0 [ 41.586516] ? get_unmapped_area+0x1f5/0x3f0 [ 41.587034] do_mmap+0x854/0xf00 [ 41.587463] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.587939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.588490] ksys_mmap_pgoff+0x3af/0x500 [ 41.588971] do_syscall_64+0x3f/0x90 [ 41.589456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.590077] RIP: 0033:0x7f834b4dfd82 [ 41.590518] 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 [ 41.592544] RSP: 002b:00007fffba3f5e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.593417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f834b4dfd82 [ 41.594225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f834a919000 [ 41.595032] RBP: 00007f834a919000 R08: 0000000000000009 R09: 0000000000001000 [ 41.595845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b35b834b20 [ 41.596664] R13: 00007fffba3f5e50 R14: 00007fffba3f5e80 R15: 00007fffba3f61e0 [ 41.597489] [ 41.597775] [ 41.597981] Allocated by task 213: [ 41.598397] kasan_save_stack+0x22/0x50 [ 41.598883] kasan_set_track+0x25/0x30 [ 41.599359] __kasan_slab_alloc+0x59/0x70 [ 41.599861] kmem_cache_alloc+0x16b/0x370 [ 41.600367] vm_area_dup+0x20/0x160 [ 41.600809] __split_vma+0x170/0x950 [ 41.601276] split_vma+0xc6/0x110 [ 41.601704] mprotect_fixup+0x8d2/0xb30 [ 41.602186] do_mprotect_pkey+0x87e/0xd40 [ 41.602691] __x64_sys_mprotect+0x78/0xc0 [ 41.603186] do_syscall_64+0x3f/0x90 [ 41.603645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.604258] [ 41.604465] Freed by task 213: [ 41.604847] kasan_save_stack+0x22/0x50 [ 41.605342] kasan_set_track+0x25/0x30 [ 41.605822] kasan_save_free_info+0x2b/0x50 [ 41.606339] __kasan_slab_free+0x10a/0x190 [ 41.606858] kmem_cache_free+0x10d/0x4d0 [ 41.607357] rcu_core+0x8c8/0x2860 [ 41.607781] __do_softirq+0x1b7/0x7d4 [ 41.608237] [ 41.608444] Last potentially related work creation: [ 41.609001] kasan_save_stack+0x22/0x50 [ 41.609489] __kasan_record_aux_stack+0x8e/0xa0 [ 41.610039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.610649] remove_vma+0x139/0x170 [ 41.611073] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.611617] do_vmi_munmap+0x1f1/0x2b0 [ 41.612076] __vm_munmap+0x138/0x3a0 [ 41.612526] __x64_sys_munmap+0x59/0x80 [ 41.613007] do_syscall_64+0x3f/0x90 [ 41.613478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.614113] [ 41.614326] The buggy address belongs to the object at ffff88800e888488 [ 41.614326] which belongs to the cache vm_area_struct of size 168 [ 41.615786] The buggy address is located 88 bytes inside of [ 41.615786] freed 168-byte region [ffff88800e888488, ffff88800e888530) [ 41.617203] [ 41.617423] The buggy address belongs to the physical page: [ 41.618092] page:00000000ccae5be1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe888 [ 41.619175] memcg:ffff88800e8a9b01 [ 41.619603] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.620311] page_type: 0xffffffff() [ 41.620772] raw: 0100000000000200 ffff88800879fc80 ffffea00003c9780 dead000000000007 [ 41.621705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8a9b01 [ 41.622605] page dumped because: kasan: bad access detected [ 41.623255] [ 41.623470] Memory state around the buggy address: [ 41.624047] ffff88800e888380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.624900] ffff88800e888400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 41.625759] >ffff88800e888480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.626598] ^ [ 41.627340] ffff88800e888500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 41.628187] ffff88800e888580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.629031] ================================================================== [ 41.630026] Disabling lock debugging due to kernel taint [ 43.459139] BUG: Bad rss-counter state mm:00000000a1e5a524 type:MM_FILEPAGES val:33 [ 43.460214] BUG: Bad rss-counter state mm:00000000a1e5a524 type:MM_ANONPAGES val:22 [ 43.888617] BUG: Bad rss-counter state mm:00000000aaf56133 type:MM_FILEPAGES val:33 [ 43.889388] BUG: Bad rss-counter state mm:00000000aaf56133 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1095' (ECDSA) to the list of known hosts. 2023/06/20 06:11:49 fuzzer started 2023/06/20 06:11:49 dialing manager at localhost:44161 2023/06/20 06:11:49 checking machine... 2023/06/20 06:11:49 checking revisions... [ 44.515936] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:11:49 testing simple program... [ 44.564685] cgroup: Unknown subsys name 'net' [ 44.608728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:11:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009a8fb40 RCX=ffff8880087c7c80 RDX=ffffea00003e9c80 RSI=ffff88800fa723f0 RDI=ffff8880087c7c80 RBP=0000000000000000 RSP=ffff888016f87c78 R8 =ffff88800fa72690 R9 =0000000000000000 R10=ffffea00003e9c80 R11=00000000800c0007 R12=dffffc0000000000 R13=ffff888016f87cb8 R14=ffff8880087c7c80 R15=ffff88800fa723f0 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f121fc89900 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=00007ffc18fe2000 CR3=000000000f186000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008e57a10 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888008e579e0 RBP=ffff888008e2d1c0 RSP=ffff888008e57920 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888008e57978 R11=0000000000000128 R12=0000000000000000 R13=ffff888008e579a0 R14=ffff888008e2d1c0 R15=ffff888008e57978 RIP=ffffffff8450d445 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 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=00007f4106c3b008 CR3=0000000019dcc000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000ff000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000