syzkaller login: [ 51.174200] sshd (212) used greatest stack depth: 23992 bytes left [ 51.175681] BUG: Bad rss-counter state mm:00000000e80fdd2f type:MM_FILEPAGES val:33 [ 51.177676] BUG: Bad rss-counter state mm:00000000e80fdd2f type:MM_ANONPAGES val:22 [ 51.346612] ================================================================== [ 51.347539] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.348462] Read of size 8 at addr ffff88801017c880 by task sshd/219 [ 51.349215] [ 51.349455] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.350528] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.351657] Call Trace: [ 51.352031] [ 51.352372] dump_stack_lvl+0x91/0xf0 [ 51.352944] print_report+0xcc/0x620 [ 51.353520] ? __virt_addr_valid+0x102/0x340 [ 51.354163] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.354892] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.355654] kasan_report+0xbe/0xf0 [ 51.356234] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.356984] vma_interval_tree_remove+0xc75/0xec0 [ 51.357712] vma_prepare+0xc54/0x11a0 [ 51.358298] __split_vma+0x5af/0x950 [ 51.358863] ? __pfx___split_vma+0x10/0x10 [ 51.359510] ? find_held_lock+0x2c/0x110 [ 51.360139] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.360813] ? lock_is_held_type+0x9f/0x120 [ 51.361466] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.362195] ? mtree_range_walk+0x632/0x900 [ 51.362856] ? mas_walk+0x5c7/0x7c0 [ 51.363434] do_vmi_munmap+0x1f1/0x2b0 [ 51.364025] mmap_region+0x1f9/0x2660 [ 51.364605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.365226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.366078] ? __pfx_lock_acquire+0x10/0x10 [ 51.366714] ? __pfx_mmap_region+0x10/0x10 [ 51.367366] ? security_mmap_addr+0x7d/0xa0 [ 51.368003] ? get_unmapped_area+0x1f5/0x3f0 [ 51.368661] do_mmap+0x854/0xf00 [ 51.369187] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.369779] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.370456] ksys_mmap_pgoff+0x3af/0x500 [ 51.371062] do_syscall_64+0x3f/0x90 [ 51.371641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.372420] RIP: 0033:0x7f388aa65d82 [ 51.372967] 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 [ 51.375537] RSP: 002b:00007ffef49edc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.376623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f388aa65d82 [ 51.377643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3889e9f000 [ 51.378656] RBP: 00007f3889e9f000 R08: 0000000000000009 R09: 0000000000001000 [ 51.379680] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3f4b7ad90 [ 51.380687] R13: 00007ffef49edc70 R14: 00007ffef49edca0 R15: 00007ffef49ee000 [ 51.381713] [ 51.382065] [ 51.382326] Allocated by task 212: [ 51.382834] kasan_save_stack+0x22/0x50 [ 51.383444] kasan_set_track+0x25/0x30 [ 51.384036] __kasan_slab_alloc+0x59/0x70 [ 51.384658] kmem_cache_alloc+0x16b/0x370 [ 51.385271] vm_area_dup+0x20/0x160 [ 51.385813] __split_vma+0x170/0x950 [ 51.386363] split_vma+0xc6/0x110 [ 51.386889] mprotect_fixup+0x8d2/0xb30 [ 51.387498] do_mprotect_pkey+0x87e/0xd40 [ 51.388119] __x64_sys_mprotect+0x78/0xc0 [ 51.388738] do_syscall_64+0x3f/0x90 [ 51.389302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.390062] [ 51.390316] Freed by task 212: [ 51.390783] kasan_save_stack+0x22/0x50 [ 51.391394] kasan_set_track+0x25/0x30 [ 51.391985] kasan_save_free_info+0x2b/0x50 [ 51.392618] __kasan_slab_free+0x10a/0x190 [ 51.393252] kmem_cache_free+0x10d/0x4d0 [ 51.393852] rcu_core+0x8c8/0x2860 [ 51.394377] __do_softirq+0x1b7/0x7d4 [ 51.394937] [ 51.395191] Last potentially related work creation: [ 51.395896] kasan_save_stack+0x22/0x50 [ 51.396492] __kasan_record_aux_stack+0x8e/0xa0 [ 51.397165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.397928] remove_vma+0x139/0x170 [ 51.398455] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.399109] do_vmi_munmap+0x1f1/0x2b0 [ 51.399687] __vm_munmap+0x138/0x3a0 [ 51.400243] __x64_sys_munmap+0x59/0x80 [ 51.400830] do_syscall_64+0x3f/0x90 [ 51.401394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.402143] [ 51.402398] The buggy address belongs to the object at ffff88801017c828 [ 51.402398] which belongs to the cache vm_area_struct of size 168 [ 51.404131] The buggy address is located 88 bytes inside of [ 51.404131] freed 168-byte region [ffff88801017c828, ffff88801017c8d0) [ 51.405790] [ 51.406041] The buggy address belongs to the physical page: [ 51.406825] page:000000009212c670 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1017c [ 51.408103] memcg:ffff88800cc09b01 [ 51.408603] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.409362] page_type: 0xffffffff() [ 51.409888] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.410963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc09b01 [ 51.412021] page dumped because: kasan: bad access detected [ 51.412791] [ 51.413040] Memory state around the buggy address: [ 51.413712] ffff88801017c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 51.414708] ffff88801017c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.415721] >ffff88801017c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.416706] ^ [ 51.417179] ffff88801017c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.418168] ffff88801017c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 51.419156] ================================================================== [ 51.420328] Disabling lock debugging due to kernel taint [ 53.341177] BUG: Bad rss-counter state mm:00000000b9449553 type:MM_FILEPAGES val:33 [ 53.342118] BUG: Bad rss-counter state mm:00000000b9449553 type:MM_ANONPAGES val:22 [ 53.910473] BUG: Bad rss-counter state mm:00000000caaaf25f type:MM_FILEPAGES val:33 [ 53.911683] BUG: Bad rss-counter state mm:00000000caaaf25f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31149' (ECDSA) to the list of known hosts. 2023/06/20 08:54:49 fuzzer started 2023/06/20 08:54:49 dialing manager at localhost:44161 2023/06/20 08:54:49 checking machine... 2023/06/20 08:54:49 checking revisions... [ 54.570607] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:54:49 testing simple program... [ 54.628754] cgroup: Unknown subsys name 'net' [ 54.677674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:54:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=1ffff1100d9c135c RSI=ffff88806ce09a68 RDI=ffff88806ce09ae8 RBP=ffff88806ce09b30 RSP=ffff88806ce099d8 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09a68 R15=ffff88806ce09a98 RIP=ffffffff81131c60 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 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=00007ffceaea1a98 CR3=0000000005482000 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=00007f7b2e3e55100000555835673790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801bdd7f58 RCX=0000000000000000 RDX=1ffff110037baff8 RSI=ffffffff818b4e66 RDI=ffff88801bdd7fc8 RBP=ffff88801bdd7f48 RSP=ffff88801bdd7f08 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88801bdd7f58 R13=0000000000000002 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff818b4eb0 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 00007fd05512b900 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=00007fd0556e30b0 CR3=000000000dd66000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000