syzkaller login: [ 31.130034] BUG: Bad rss-counter state mm:000000001ff3a564 type:MM_FILEPAGES val:33 [ 31.131254] BUG: Bad rss-counter state mm:000000001ff3a564 type:MM_ANONPAGES val:22 [ 31.278277] ================================================================== [ 31.279204] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.280131] Read of size 8 at addr ffff8880162aa058 by task sshd/220 [ 31.280960] [ 31.281387] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.282375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.283384] Call Trace: [ 31.283706] [ 31.284001] dump_stack_lvl+0x91/0xf0 [ 31.284492] print_report+0xcc/0x620 [ 31.284993] ? __virt_addr_valid+0x102/0x340 [ 31.285548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286183] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286807] kasan_report+0xbe/0xf0 [ 31.287293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287918] vma_interval_tree_remove+0xc75/0xec0 [ 31.288526] vma_prepare+0xc54/0x11a0 [ 31.289024] __split_vma+0x5af/0x950 [ 31.289498] ? __pfx___split_vma+0x10/0x10 [ 31.290032] ? find_held_lock+0x2c/0x110 [ 31.290574] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.291147] ? lock_is_held_type+0x9f/0x120 [ 31.291679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.292300] ? mtree_range_walk+0x632/0x900 [ 31.292845] ? mas_walk+0x5c7/0x7c0 [ 31.293348] do_vmi_munmap+0x1f1/0x2b0 [ 31.293836] mmap_region+0x1f9/0x2660 [ 31.294340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.294877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.295595] ? __pfx_lock_acquire+0x10/0x10 [ 31.296132] ? __pfx_mmap_region+0x10/0x10 [ 31.296657] ? security_mmap_addr+0x7d/0xa0 [ 31.297206] ? get_unmapped_area+0x1f5/0x3f0 [ 31.297758] do_mmap+0x854/0xf00 [ 31.298216] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.298727] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.299305] ksys_mmap_pgoff+0x3af/0x500 [ 31.299806] do_syscall_64+0x3f/0x90 [ 31.300290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300961] RIP: 0033:0x7f116ec24d82 [ 31.301414] 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 [ 31.303566] RSP: 002b:00007ffc9f5471b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.304470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f116ec24d82 [ 31.305329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f116e05e000 [ 31.306182] RBP: 00007f116e05e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.307057] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c25d68ec0 [ 31.307903] R13: 00007ffc9f5471d0 R14: 00007ffc9f547200 R15: 00007ffc9f547560 [ 31.308753] [ 31.309069] [ 31.309282] Allocated by task 213: [ 31.309705] kasan_save_stack+0x22/0x50 [ 31.310219] kasan_set_track+0x25/0x30 [ 31.310729] __kasan_slab_alloc+0x59/0x70 [ 31.311266] kmem_cache_alloc+0x16b/0x370 [ 31.311777] vm_area_dup+0x20/0x160 [ 31.312238] __split_vma+0x170/0x950 [ 31.312703] split_vma+0xc6/0x110 [ 31.313163] mprotect_fixup+0x8d2/0xb30 [ 31.313663] do_mprotect_pkey+0x87e/0xd40 [ 31.314196] __x64_sys_mprotect+0x78/0xc0 [ 31.314730] do_syscall_64+0x3f/0x90 [ 31.315214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315852] [ 31.316075] Freed by task 213: [ 31.316474] kasan_save_stack+0x22/0x50 [ 31.317005] kasan_set_track+0x25/0x30 [ 31.317493] kasan_save_free_info+0x2b/0x50 [ 31.318028] __kasan_slab_free+0x10a/0x190 [ 31.318569] kmem_cache_free+0x10d/0x4d0 [ 31.319089] rcu_core+0x8c8/0x2860 [ 31.319528] __do_softirq+0x1b7/0x7d4 [ 31.320014] [ 31.320228] Last potentially related work creation: [ 31.320807] kasan_save_stack+0x22/0x50 [ 31.321325] __kasan_record_aux_stack+0x8e/0xa0 [ 31.321909] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.322773] remove_vma+0x139/0x170 [ 31.323237] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.323784] do_vmi_munmap+0x1f1/0x2b0 [ 31.324270] __vm_munmap+0x138/0x3a0 [ 31.324733] __x64_sys_munmap+0x59/0x80 [ 31.325251] do_syscall_64+0x3f/0x90 [ 31.325721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.326389] [ 31.326609] The buggy address belongs to the object at ffff8880162aa000 [ 31.326609] which belongs to the cache vm_area_struct of size 168 [ 31.328096] The buggy address is located 88 bytes inside of [ 31.328096] freed 168-byte region [ffff8880162aa000, ffff8880162aa0a8) [ 31.329505] [ 31.329734] The buggy address belongs to the physical page: [ 31.330413] page:00000000ab533d7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162aa [ 31.331509] memcg:ffff88800fc52801 [ 31.331940] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.332591] page_type: 0xffffffff() [ 31.333059] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.333981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc52801 [ 31.334916] page dumped because: kasan: bad access detected [ 31.335575] [ 31.335795] Memory state around the buggy address: [ 31.336385] ffff8880162a9f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.337256] ffff8880162a9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.338135] >ffff8880162aa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.339006] ^ [ 31.339721] ffff8880162aa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.340574] ffff8880162aa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.341438] ================================================================== [ 31.342392] Disabling lock debugging due to kernel taint [ 33.205777] BUG: Bad rss-counter state mm:00000000b621ec63 type:MM_FILEPAGES val:33 [ 33.206951] BUG: Bad rss-counter state mm:00000000b621ec63 type:MM_ANONPAGES val:22 [ 33.661457] BUG: Bad rss-counter state mm:000000000b89ff9e type:MM_FILEPAGES val:33 [ 33.662408] BUG: Bad rss-counter state mm:000000000b89ff9e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5729' (ECDSA) to the list of known hosts. 2023/06/20 23:04:06 fuzzer started 2023/06/20 23:04:06 dialing manager at localhost:36067 2023/06/20 23:04:06 checking machine... 2023/06/20 23:04:06 checking revisions... [ 34.321824] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:04:06 testing simple program... [ 34.375450] cgroup: Unknown subsys name 'net' [ 34.411740] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:04:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016cab680 RSI=ffffffff82168b4a RDI=0000000000000007 RBP=00007ffe9a75a950 RSP=ffff88800f227b28 R8 =0000000000000007 R9 =0000000000000000 R10=00007ffe9a75a950 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=ffff88800f227cd8 R15=ffff88800f227e70 RIP=ffffffff82168b4d RFL=00040293 [--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 00007f6eeafc4900 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=00007f6eeb57b618 CR3=0000000019ee4000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff845137d7 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e07e01 RSI=ffff888008e07e70 RDI=ffff888008e07e70 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff864b37a6 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888008e07e78 R15=ffff88806cf09a78 RIP=ffffffff81131041 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 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=00007f5894b82a70 CR3=000000000960a000 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=516482d3bdf2a1aa8c421ba64ae28016 XMM02=2c67c8bc2e329bc3000000000011a0a8 XMM03=fb795ef6d657705600000000001219f0 XMM04=875d5b2eb9b0e76f00000000000ae988 XMM05=19e9129bd510f2350000000000131868 XMM06=b4fea5377486de6300000000001306d0 XMM07=e042d86d42eb936e0000000000121c70 XMM08=306453997ed9c472000000000011a108 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000