syzkaller login: [ 31.163743] BUG: Bad rss-counter state mm:000000002398f0c4 type:MM_FILEPAGES val:33 [ 31.164366] BUG: Bad rss-counter state mm:000000002398f0c4 type:MM_ANONPAGES val:22 [ 31.281150] ================================================================== [ 31.281852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.282569] Read of size 8 at addr ffff88801968c058 by task sshd/219 [ 31.283157] [ 31.283324] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.283978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.284724] Call Trace: [ 31.285066] [ 31.285282] dump_stack_lvl+0x91/0xf0 [ 31.285658] print_report+0xcc/0x620 [ 31.286024] ? __virt_addr_valid+0x102/0x340 [ 31.286449] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287397] kasan_report+0xbe/0xf0 [ 31.287756] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288220] vma_interval_tree_remove+0xc75/0xec0 [ 31.288683] vma_prepare+0xc54/0x11a0 [ 31.289046] __split_vma+0x5af/0x950 [ 31.289408] ? __pfx___split_vma+0x10/0x10 [ 31.289806] ? find_held_lock+0x2c/0x110 [ 31.290203] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.290636] ? lock_is_held_type+0x9f/0x120 [ 31.291072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.291536] ? mtree_range_walk+0x632/0x900 [ 31.291924] ? mas_walk+0x5c7/0x7c0 [ 31.292216] do_vmi_munmap+0x1f1/0x2b0 [ 31.292516] mmap_region+0x1f9/0x2660 [ 31.292811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.293126] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.293565] ? __pfx_lock_acquire+0x10/0x10 [ 31.293899] ? __pfx_mmap_region+0x10/0x10 [ 31.294220] ? security_mmap_addr+0x7d/0xa0 [ 31.294552] ? get_unmapped_area+0x1f5/0x3f0 [ 31.294895] do_mmap+0x854/0xf00 [ 31.295167] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.295473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.295819] ksys_mmap_pgoff+0x3af/0x500 [ 31.296128] do_syscall_64+0x3f/0x90 [ 31.296423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296818] RIP: 0033:0x7fbe66be5d82 [ 31.297097] 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 [ 31.298408] RSP: 002b:00007ffc47c3a4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.298976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe66be5d82 [ 31.299502] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe6601f000 [ 31.300014] RBP: 00007fbe6601f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300532] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa3695ad90 [ 31.301045] R13: 00007ffc47c3a4c0 R14: 00007ffc47c3a4f0 R15: 00007ffc47c3a850 [ 31.301573] [ 31.301752] [ 31.301883] Allocated by task 212: [ 31.302146] kasan_save_stack+0x22/0x50 [ 31.302452] kasan_set_track+0x25/0x30 [ 31.302757] __kasan_slab_alloc+0x59/0x70 [ 31.303088] kmem_cache_alloc+0x16b/0x370 [ 31.303403] vm_area_dup+0x20/0x160 [ 31.303684] __split_vma+0x170/0x950 [ 31.303968] split_vma+0xc6/0x110 [ 31.304234] mprotect_fixup+0x8d2/0xb30 [ 31.304543] do_mprotect_pkey+0x87e/0xd40 [ 31.304860] __x64_sys_mprotect+0x78/0xc0 [ 31.305174] do_syscall_64+0x3f/0x90 [ 31.305463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305856] [ 31.305989] Freed by task 209: [ 31.306229] kasan_save_stack+0x22/0x50 [ 31.306537] kasan_set_track+0x25/0x30 [ 31.306855] kasan_save_free_info+0x2b/0x50 [ 31.307179] __kasan_slab_free+0x10a/0x190 [ 31.307501] kmem_cache_free+0x10d/0x4d0 [ 31.307812] rcu_core+0x8c8/0x2860 [ 31.308087] __do_softirq+0x1b7/0x7d4 [ 31.308377] [ 31.308509] Last potentially related work creation: [ 31.308867] kasan_save_stack+0x22/0x50 [ 31.309176] __kasan_record_aux_stack+0x8e/0xa0 [ 31.309528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309919] remove_vma+0x139/0x170 [ 31.310195] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.310536] do_vmi_munmap+0x1f1/0x2b0 [ 31.310837] __vm_munmap+0x138/0x3a0 [ 31.311126] __x64_sys_munmap+0x59/0x80 [ 31.311432] do_syscall_64+0x3f/0x90 [ 31.311722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312116] [ 31.312250] The buggy address belongs to the object at ffff88801968c000 [ 31.312250] which belongs to the cache vm_area_struct of size 168 [ 31.313152] The buggy address is located 88 bytes inside of [ 31.313152] freed 168-byte region [ffff88801968c000, ffff88801968c0a8) [ 31.314011] [ 31.314142] The buggy address belongs to the physical page: [ 31.314544] page:000000006b41e977 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1968c [ 31.315223] memcg:ffff88800f5bd801 [ 31.315481] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.315877] page_type: 0xffffffff() [ 31.316152] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.316718] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5bd801 [ 31.317275] page dumped because: kasan: bad access detected [ 31.317680] [ 31.317811] Memory state around the buggy address: [ 31.318169] ffff88801968bf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.318694] ffff88801968bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.319245] >ffff88801968c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.319767] ^ [ 31.320209] ffff88801968c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.320731] ffff88801968c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.321254] ================================================================== [ 31.321853] Disabling lock debugging due to kernel taint [ 33.545611] BUG: Bad rss-counter state mm:000000000f7e3da5 type:MM_FILEPAGES val:33 [ 33.547388] BUG: Bad rss-counter state mm:000000000f7e3da5 type:MM_ANONPAGES val:22 [ 34.128085] BUG: Bad rss-counter state mm:0000000078d5f7c5 type:MM_FILEPAGES val:33 [ 34.129276] BUG: Bad rss-counter state mm:0000000078d5f7c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61898' (ECDSA) to the list of known hosts. 2023/06/20 14:50:03 fuzzer started 2023/06/20 14:50:03 dialing manager at localhost:36067 2023/06/20 14:50:03 checking machine... 2023/06/20 14:50:03 checking revisions... [ 34.779390] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:50:03 testing simple program... [ 34.831911] cgroup: Unknown subsys name 'net' [ 34.872045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fe018015000 CR3=000000000e50c000 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=30353a3431203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363431 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=0000000000000441 RBX=0000559c51248750 RCX=0000000000000000 RDX=0000000000000000 RSI=0000559c5125fe10 RDI=0000559c5125fe10 RBP=0000559c5124f640 RSP=00007fff38c9f6c0 R8 =0000000000000007 R9 =00007fff38c98aa8 R10=0000559c51260280 R11=0000000000000246 R12=0000559c51237350 R13=0000000000000000 R14=00007fff38c9fac0 R15=00007fff38c9f870 RIP=00007fe0d9b22740 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe0d96a4900 00000000 00000000 GS =0000 0000000000000000 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=00007fff38c99000 CR3=000000000eb8e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000