syzkaller login: [ 35.372324] BUG: Bad rss-counter state mm:00000000c3197e0a type:MM_FILEPAGES val:33 [ 35.374127] BUG: Bad rss-counter state mm:00000000c3197e0a type:MM_ANONPAGES val:22 [ 35.543625] ================================================================== [ 35.544726] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.545839] Read of size 8 at addr ffff88800ef0d3f8 by task sshd/220 [ 35.546926] [ 35.547187] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.548201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.549374] Call Trace: [ 35.549709] [ 35.549989] dump_stack_lvl+0x91/0xf0 [ 35.550478] print_report+0xcc/0x620 [ 35.550962] ? __virt_addr_valid+0x102/0x340 [ 35.551511] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.552131] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.552747] kasan_report+0xbe/0xf0 [ 35.553227] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.553860] vma_interval_tree_remove+0xc75/0xec0 [ 35.554470] vma_prepare+0xc54/0x11a0 [ 35.554948] __split_vma+0x5af/0x950 [ 35.555416] ? __pfx___split_vma+0x10/0x10 [ 35.555938] ? find_held_lock+0x2c/0x110 [ 35.556461] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.557025] ? lock_is_held_type+0x9f/0x120 [ 35.557577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.558185] ? mtree_range_walk+0x632/0x900 [ 35.558746] ? mas_walk+0x5c7/0x7c0 [ 35.559213] do_vmi_munmap+0x1f1/0x2b0 [ 35.559705] mmap_region+0x1f9/0x2660 [ 35.560184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.560689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.561406] ? __pfx_lock_acquire+0x10/0x10 [ 35.561943] ? __pfx_mmap_region+0x10/0x10 [ 35.562465] ? security_mmap_addr+0x7d/0xa0 [ 35.562990] ? get_unmapped_area+0x1f5/0x3f0 [ 35.563540] do_mmap+0x854/0xf00 [ 35.563971] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.564464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.565020] ksys_mmap_pgoff+0x3af/0x500 [ 35.565550] do_syscall_64+0x3f/0x90 [ 35.566025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.566665] RIP: 0033:0x7f33a5484d82 [ 35.567116] 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 [ 35.569216] RSP: 002b:00007ffc66cf06e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.570134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33a5484d82 [ 35.570974] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33a48be000 [ 35.571820] RBP: 00007f33a48be000 R08: 0000000000000009 R09: 0000000000001000 [ 35.572665] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576ebd78ec0 [ 35.573500] R13: 00007ffc66cf0700 R14: 00007ffc66cf0730 R15: 00007ffc66cf0a90 [ 35.574373] [ 35.574661] [ 35.574874] Allocated by task 213: [ 35.575303] kasan_save_stack+0x22/0x50 [ 35.575807] kasan_set_track+0x25/0x30 [ 35.576292] __kasan_slab_alloc+0x59/0x70 [ 35.576814] kmem_cache_alloc+0x16b/0x370 [ 35.577322] vm_area_dup+0x20/0x160 [ 35.577774] __split_vma+0x170/0x950 [ 35.578236] split_vma+0xc6/0x110 [ 35.578671] mprotect_fixup+0x8d2/0xb30 [ 35.579166] do_mprotect_pkey+0x87e/0xd40 [ 35.579678] __x64_sys_mprotect+0x78/0xc0 [ 35.580191] do_syscall_64+0x3f/0x90 [ 35.580656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.581292] [ 35.581504] Freed by task 203: [ 35.581902] kasan_save_stack+0x22/0x50 [ 35.582401] kasan_set_track+0x25/0x30 [ 35.582889] kasan_save_free_info+0x2b/0x50 [ 35.583411] __kasan_slab_free+0x10a/0x190 [ 35.583937] kmem_cache_free+0x10d/0x4d0 [ 35.584440] rcu_core+0x8c8/0x2860 [ 35.584878] __do_softirq+0x1b7/0x7d4 [ 35.585348] [ 35.585576] Last potentially related work creation: [ 35.586157] kasan_save_stack+0x22/0x50 [ 35.586655] __kasan_record_aux_stack+0x8e/0xa0 [ 35.587224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.587953] remove_vma+0x139/0x170 [ 35.588402] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.588956] do_vmi_munmap+0x1f1/0x2b0 [ 35.589438] __vm_munmap+0x138/0x3a0 [ 35.589912] __x64_sys_munmap+0x59/0x80 [ 35.590400] do_syscall_64+0x3f/0x90 [ 35.590868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.591502] [ 35.591718] The buggy address belongs to the object at ffff88800ef0d3a0 [ 35.591718] which belongs to the cache vm_area_struct of size 168 [ 35.593165] The buggy address is located 88 bytes inside of [ 35.593165] freed 168-byte region [ffff88800ef0d3a0, ffff88800ef0d448) [ 35.594574] [ 35.594787] The buggy address belongs to the physical page: [ 35.595434] page:0000000054ac0b32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef0d [ 35.596500] memcg:ffff88800c7c4301 [ 35.596924] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.597571] page_type: 0xffffffff() [ 35.598016] raw: 0100000000000200 ffff88800879fc80 ffffea000038b580 dead000000000004 [ 35.598932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7c4301 [ 35.599831] page dumped because: kasan: bad access detected [ 35.600493] [ 35.600705] Memory state around the buggy address: [ 35.601280] ffff88800ef0d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.602140] ffff88800ef0d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.602983] >ffff88800ef0d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.603822] ^ [ 35.604659] ffff88800ef0d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.605507] ffff88800ef0d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.606362] ================================================================== [ 35.607285] Disabling lock debugging due to kernel taint [ 37.902730] BUG: Bad rss-counter state mm:000000008a6854b1 type:MM_FILEPAGES val:33 [ 37.903918] BUG: Bad rss-counter state mm:000000008a6854b1 type:MM_ANONPAGES val:22 [ 38.318196] BUG: Bad rss-counter state mm:000000008becc959 type:MM_FILEPAGES val:33 [ 38.319380] BUG: Bad rss-counter state mm:000000008becc959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30012' (ECDSA) to the list of known hosts. 2023/06/20 06:58:19 fuzzer started 2023/06/20 06:58:20 dialing manager at localhost:44161 2023/06/20 06:58:20 checking machine... 2023/06/20 06:58:20 checking revisions... [ 39.090633] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:58:20 testing simple program... [ 39.144608] cgroup: Unknown subsys name 'net' [ 39.198121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:58:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff818a87ec RDX=ffff88800f500000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800f29fb08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800f29fc48 R13=dffffc0000000000 R14=0000000000008000 R15=ffff88800f29fdf0 RIP=ffffffff814c07e0 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 00007f79df8f6900 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=00007ffc14da5000 CR3=000000000e02e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110034389db RBX=ffff88801a1c4ea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a1c4ed8 RBP=ffff88801a117508 RSP=ffff88800f29fd18 R8 =0000000000000001 R9 =ffffed1001e53f97 R10=0000000000000003 R11=00000000000b6cb2 R12=dffffc0000000000 R13=ffff88801a1175c0 R14=ffffffff813782a8 R15=ffff88801a1175c0 RIP=ffffffff81846362 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f79df8f6900 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=00007fa0938fdc00 CR3=000000000e02e000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000