syzkaller login: [ 28.744681] BUG: Bad rss-counter state mm:0000000036387c20 type:MM_FILEPAGES val:33 [ 28.746320] BUG: Bad rss-counter state mm:0000000036387c20 type:MM_ANONPAGES val:22 [ 28.914555] ================================================================== [ 28.915540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.916548] Read of size 8 at addr ffff88801987a6b0 by task sshd/221 [ 28.917366] [ 28.917687] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.918607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.919674] Call Trace: [ 28.920013] [ 28.920322] dump_stack_lvl+0x91/0xf0 [ 28.920855] print_report+0xcc/0x620 [ 28.921378] ? __virt_addr_valid+0x102/0x340 [ 28.921974] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.922641] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.923307] kasan_report+0xbe/0xf0 [ 28.923826] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.924502] vma_interval_tree_remove+0xc75/0xec0 [ 28.925166] vma_prepare+0xc54/0x11a0 [ 28.925697] __split_vma+0x5af/0x950 [ 28.926217] ? __pfx___split_vma+0x10/0x10 [ 28.926811] ? find_held_lock+0x2c/0x110 [ 28.927396] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.928020] ? lock_is_held_type+0x9f/0x120 [ 28.928617] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.929284] ? mtree_range_walk+0x632/0x900 [ 28.929896] ? mas_walk+0x5c7/0x7c0 [ 28.930424] do_vmi_munmap+0x1f1/0x2b0 [ 28.930992] mmap_region+0x1f9/0x2660 [ 28.931531] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.932096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.932878] ? __pfx_lock_acquire+0x10/0x10 [ 28.933464] ? __pfx_mmap_region+0x10/0x10 [ 28.934050] ? security_mmap_addr+0x7d/0xa0 [ 28.934639] ? get_unmapped_area+0x1f5/0x3f0 [ 28.935253] do_mmap+0x854/0xf00 [ 28.935733] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.936277] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.936898] ksys_mmap_pgoff+0x3af/0x500 [ 28.937454] do_syscall_64+0x3f/0x90 [ 28.937983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.938693] RIP: 0033:0x7f913c039d82 [ 28.939228] 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 [ 28.941529] RSP: 002b:00007fff1d16b1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.942498] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f913c039d82 [ 28.943477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f913b473000 [ 28.944389] RBP: 00007f913b473000 R08: 0000000000000009 R09: 0000000000001000 [ 28.945303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a9428d8ec0 [ 28.946205] R13: 00007fff1d16b1d0 R14: 00007fff1d16b200 R15: 00007fff1d16b560 [ 28.947134] [ 28.947449] [ 28.947683] Allocated by task 214: [ 28.948140] kasan_save_stack+0x22/0x50 [ 28.948678] kasan_set_track+0x25/0x30 [ 28.949208] __kasan_slab_alloc+0x59/0x70 [ 28.949782] kmem_cache_alloc+0x16b/0x370 [ 28.950352] vm_area_dup+0x20/0x160 [ 28.950871] __split_vma+0x170/0x950 [ 28.951390] split_vma+0xc6/0x110 [ 28.951874] mprotect_fixup+0x8d2/0xb30 [ 28.952429] do_mprotect_pkey+0x87e/0xd40 [ 28.953005] __x64_sys_mprotect+0x78/0xc0 [ 28.953583] do_syscall_64+0x3f/0x90 [ 28.954106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954818] [ 28.955060] Freed by task 214: [ 28.955488] kasan_save_stack+0x22/0x50 [ 28.956043] kasan_set_track+0x25/0x30 [ 28.956586] kasan_save_free_info+0x2b/0x50 [ 28.957167] __kasan_slab_free+0x10a/0x190 [ 28.957753] kmem_cache_free+0x10d/0x4d0 [ 28.958313] rcu_core+0x8c8/0x2860 [ 28.958824] __do_softirq+0x1b7/0x7d4 [ 28.959359] [ 28.959597] Last potentially related work creation: [ 28.960247] kasan_save_stack+0x22/0x50 [ 28.960803] __kasan_record_aux_stack+0x8e/0xa0 [ 28.961429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.962136] remove_vma+0x139/0x170 [ 28.962633] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.963248] do_vmi_munmap+0x1f1/0x2b0 [ 28.963782] __vm_munmap+0x138/0x3a0 [ 28.964298] __x64_sys_munmap+0x59/0x80 [ 28.964846] do_syscall_64+0x3f/0x90 [ 28.965374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.966089] [ 28.966326] The buggy address belongs to the object at ffff88801987a658 [ 28.966326] which belongs to the cache vm_area_struct of size 168 [ 28.967960] The buggy address is located 88 bytes inside of [ 28.967960] freed 168-byte region [ffff88801987a658, ffff88801987a700) [ 28.969512] [ 28.969750] The buggy address belongs to the physical page: [ 28.970485] page:00000000fe31bb15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1987a [ 28.971715] memcg:ffff88800dac6601 [ 28.972184] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.972892] page_type: 0xffffffff() [ 28.973394] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.974389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dac6601 [ 28.975305] page dumped because: kasan: bad access detected [ 28.975969] [ 28.976189] Memory state around the buggy address: [ 28.976777] ffff88801987a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.977633] ffff88801987a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.978487] >ffff88801987a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.979355] ^ [ 28.979938] ffff88801987a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.980790] ffff88801987a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.981638] ================================================================== [ 28.982687] Disabling lock debugging due to kernel taint [ 30.896435] BUG: Bad rss-counter state mm:000000005147936d type:MM_FILEPAGES val:33 [ 30.897608] BUG: Bad rss-counter state mm:000000005147936d type:MM_ANONPAGES val:22 [ 31.310542] BUG: Bad rss-counter state mm:0000000085abcebf type:MM_FILEPAGES val:33 [ 31.311280] BUG: Bad rss-counter state mm:0000000085abcebf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25511' (ECDSA) to the list of known hosts. 2023/06/20 21:41:31 fuzzer started 2023/06/20 21:41:31 dialing manager at localhost:36067 2023/06/20 21:41:31 checking machine... 2023/06/20 21:41:31 checking revisions... [ 32.054983] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:41:32 testing simple program... [ 32.106825] cgroup: Unknown subsys name 'net' [ 32.144887] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:41:31 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=00007f584989a730 CR3=000000000959c000 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=2031333a31343a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a31343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801873ef98 RCX=0000000000000001 RDX=1ffff110030e7dfe RSI=ffff88801873fbd8 RDI=ffffffff8173f870 RBP=ffff88801873eff0 RSP=ffff88801873ef80 R8 =0000000000000001 R9 =ffff88801873efd8 R10=0000000000038001 R11=00000000000b3fb2 R12=ffff88801873f060 R13=0000000000000000 R14=ffff888016811b40 R15=0000000000092800 RIP=ffffffff81130399 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 00007fb6ea5ca900 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=00007fb6ea58f008 CR3=00000000185e6000 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=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