syzkaller login: [ 25.211339] BUG: Bad rss-counter state mm:000000002f65562c type:MM_FILEPAGES val:33 [ 25.212434] BUG: Bad rss-counter state mm:000000002f65562c type:MM_ANONPAGES val:22 [ 25.376135] ================================================================== [ 25.377017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.377899] Read of size 8 at addr ffff88800dd19df0 by task sshd/219 [ 25.378630] [ 25.378842] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.379797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.380715] Call Trace: [ 25.381017] [ 25.381287] dump_stack_lvl+0x91/0xf0 [ 25.381776] print_report+0xcc/0x620 [ 25.382231] ? __virt_addr_valid+0x102/0x340 [ 25.382762] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.383346] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.383931] kasan_report+0xbe/0xf0 [ 25.384381] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.384969] vma_interval_tree_remove+0xc75/0xec0 [ 25.385543] vma_prepare+0xc54/0x11a0 [ 25.385996] __split_vma+0x5af/0x950 [ 25.386459] ? __pfx___split_vma+0x10/0x10 [ 25.386964] ? find_held_lock+0x2c/0x110 [ 25.387461] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.387999] ? lock_is_held_type+0x9f/0x120 [ 25.388521] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.389099] ? mtree_range_walk+0x632/0x900 [ 25.389622] ? mas_walk+0x5c7/0x7c0 [ 25.390081] do_vmi_munmap+0x1f1/0x2b0 [ 25.390581] mmap_region+0x1f9/0x2660 [ 25.391047] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.391545] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.392233] ? __pfx_lock_acquire+0x10/0x10 [ 25.392748] ? __pfx_mmap_region+0x10/0x10 [ 25.393249] ? security_mmap_addr+0x7d/0xa0 [ 25.393762] ? get_unmapped_area+0x1f5/0x3f0 [ 25.394279] do_mmap+0x854/0xf00 [ 25.394732] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.395207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.395734] ksys_mmap_pgoff+0x3af/0x500 [ 25.396211] do_syscall_64+0x3f/0x90 [ 25.396667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.397285] RIP: 0033:0x7f76b467bd82 [ 25.397722] 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 [ 25.399729] RSP: 002b:00007ffe298a0a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.400577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76b467bd82 [ 25.401375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76b3ab5000 [ 25.402175] RBP: 00007f76b3ab5000 R08: 0000000000000009 R09: 0000000000001000 [ 25.402980] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc898d9ec0 [ 25.403788] R13: 00007ffe298a0a40 R14: 00007ffe298a0a70 R15: 00007ffe298a0dd0 [ 25.404647] [ 25.404938] [ 25.405154] Allocated by task 212: [ 25.405585] kasan_save_stack+0x22/0x50 [ 25.406079] kasan_set_track+0x25/0x30 [ 25.406575] __kasan_slab_alloc+0x59/0x70 [ 25.407102] kmem_cache_alloc+0x16b/0x370 [ 25.407619] vm_area_dup+0x20/0x160 [ 25.408074] __split_vma+0x170/0x950 [ 25.408541] split_vma+0xc6/0x110 [ 25.408979] mprotect_fixup+0x8d2/0xb30 [ 25.409537] do_mprotect_pkey+0x87e/0xd40 [ 25.410069] __x64_sys_mprotect+0x78/0xc0 [ 25.410612] do_syscall_64+0x3f/0x90 [ 25.411092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.411744] [ 25.411959] Freed by task 212: [ 25.412364] kasan_save_stack+0x22/0x50 [ 25.412878] kasan_set_track+0x25/0x30 [ 25.413405] kasan_save_free_info+0x2b/0x50 [ 25.413966] __kasan_slab_free+0x10a/0x190 [ 25.414539] kmem_cache_free+0x10d/0x4d0 [ 25.415067] rcu_core+0x8c8/0x2860 [ 25.415524] __do_softirq+0x1b7/0x7d4 [ 25.416021] [ 25.416240] Last potentially related work creation: [ 25.416839] kasan_save_stack+0x22/0x50 [ 25.417346] __kasan_record_aux_stack+0x8e/0xa0 [ 25.417934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.418599] remove_vma+0x139/0x170 [ 25.419055] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.419641] do_vmi_munmap+0x1f1/0x2b0 [ 25.420127] __vm_munmap+0x138/0x3a0 [ 25.420595] __x64_sys_munmap+0x59/0x80 [ 25.421194] do_syscall_64+0x3f/0x90 [ 25.421702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.422359] [ 25.422596] The buggy address belongs to the object at ffff88800dd19d98 [ 25.422596] which belongs to the cache vm_area_struct of size 168 [ 25.424113] The buggy address is located 88 bytes inside of [ 25.424113] freed 168-byte region [ffff88800dd19d98, ffff88800dd19e40) [ 25.425622] [ 25.425859] The buggy address belongs to the physical page: [ 25.426565] page:00000000e84e9fc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd19 [ 25.427725] memcg:ffff88800ff4f801 [ 25.428171] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.428873] page_type: 0xffffffff() [ 25.429323] raw: 0100000000000200 ffff88800879fc80 ffffea0000385cc0 dead000000000003 [ 25.430250] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff4f801 [ 25.431184] page dumped because: kasan: bad access detected [ 25.431844] [ 25.432068] Memory state around the buggy address: [ 25.432674] ffff88800dd19c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.433545] ffff88800dd19d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.434453] >ffff88800dd19d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 25.435315] ^ [ 25.436148] ffff88800dd19e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.437019] ffff88800dd19e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.437880] ================================================================== [ 25.438842] Disabling lock debugging due to kernel taint [ 27.492955] BUG: Bad rss-counter state mm:00000000d514de8a type:MM_FILEPAGES val:33 [ 27.494028] BUG: Bad rss-counter state mm:00000000d514de8a type:MM_ANONPAGES val:22 [ 27.982407] BUG: Bad rss-counter state mm:00000000237d82da type:MM_FILEPAGES val:33 [ 27.983408] BUG: Bad rss-counter state mm:00000000237d82da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49418' (ECDSA) to the list of known hosts. 2023/06/19 15:33:15 fuzzer started 2023/06/19 15:33:16 dialing manager at localhost:44161 2023/06/19 15:33:16 checking machine... 2023/06/19 15:33:16 checking revisions... [ 28.701653] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:33:16 testing simple program... [ 28.750855] cgroup: Unknown subsys name 'net' [ 28.800800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:14 Registers: info registers vcpu 0 RAX=000000000009a8c3 RBX=0000000000000001 RCX=ffffffff83c181d9 RDX=000000000009a8cd RSI=000000000002c181 RDI=ffffffff8641189a RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff8641185e R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000009a8c3 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff81130861 RFL=00000283 [--S---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 00007fb704237900 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=00007fb7047ec650 CR3=0000000017d86000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888015d18000 RSI=ffffffff8171ad99 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015d0fe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000004000 R13=00007f7115d2ee70 R14=ffff88800e731750 R15=0000000000000040 RIP=ffffffff8135bcf0 RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f71168ce900 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=00007f7115d2ee70 CR3=000000000f0b8000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aa8454cd38ee0ab500000000000ae988 XMM05=55248a55420a12890000000000135b80 XMM06=806171799158d9670000000000134600 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000