syzkaller login: [ 30.608813] BUG: Bad rss-counter state mm:00000000319b327c type:MM_FILEPAGES val:33 [ 30.610340] BUG: Bad rss-counter state mm:00000000319b327c type:MM_ANONPAGES val:22 [ 30.774714] ================================================================== [ 30.775652] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.776595] Read of size 8 at addr ffff88801970edf0 by task sshd/219 [ 30.777377] [ 30.777610] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.778701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.779694] Call Trace: [ 30.780023] [ 30.780315] dump_stack_lvl+0x91/0xf0 [ 30.780810] print_report+0xcc/0x620 [ 30.781306] ? __virt_addr_valid+0x102/0x340 [ 30.781887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782504] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783131] kasan_report+0xbe/0xf0 [ 30.783612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784246] vma_interval_tree_remove+0xc75/0xec0 [ 30.784850] vma_prepare+0xc54/0x11a0 [ 30.785338] __split_vma+0x5af/0x950 [ 30.785824] ? __pfx___split_vma+0x10/0x10 [ 30.786364] ? find_held_lock+0x2c/0x110 [ 30.786896] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.787467] ? lock_is_held_type+0x9f/0x120 [ 30.788003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.788618] ? mtree_range_walk+0x632/0x900 [ 30.789171] ? mas_walk+0x5c7/0x7c0 [ 30.789651] do_vmi_munmap+0x1f1/0x2b0 [ 30.790150] mmap_region+0x1f9/0x2660 [ 30.790634] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.791145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.791862] ? __pfx_lock_acquire+0x10/0x10 [ 30.792403] ? __pfx_mmap_region+0x10/0x10 [ 30.792937] ? security_mmap_addr+0x7d/0xa0 [ 30.793491] ? get_unmapped_area+0x1f5/0x3f0 [ 30.794041] do_mmap+0x854/0xf00 [ 30.794488] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.794983] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.795557] ksys_mmap_pgoff+0x3af/0x500 [ 30.796077] do_syscall_64+0x3f/0x90 [ 30.796561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797206] RIP: 0033:0x7fa296a1bd82 [ 30.797671] 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 [ 30.799820] RSP: 002b:00007ffe56f311e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.800725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa296a1bd82 [ 30.801581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa295e55000 [ 30.802444] RBP: 00007fa295e55000 R08: 0000000000000009 R09: 0000000000001000 [ 30.803292] R10: 0000000000000812 R11: 0000000000000206 R12: 000056187f59bb20 [ 30.804143] R13: 00007ffe56f31200 R14: 00007ffe56f31230 R15: 00007ffe56f31590 [ 30.805001] [ 30.805296] [ 30.805530] Allocated by task 212: [ 30.805958] kasan_save_stack+0x22/0x50 [ 30.806465] kasan_set_track+0x25/0x30 [ 30.806956] __kasan_slab_alloc+0x59/0x70 [ 30.807482] kmem_cache_alloc+0x16b/0x370 [ 30.808004] vm_area_dup+0x20/0x160 [ 30.808460] __split_vma+0x170/0x950 [ 30.808927] split_vma+0xc6/0x110 [ 30.809371] mprotect_fixup+0x8d2/0xb30 [ 30.809885] do_mprotect_pkey+0x87e/0xd40 [ 30.810403] __x64_sys_mprotect+0x78/0xc0 [ 30.810925] do_syscall_64+0x3f/0x90 [ 30.811402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812060] [ 30.812275] Freed by task 212: [ 30.812667] kasan_save_stack+0x22/0x50 [ 30.813169] kasan_set_track+0x25/0x30 [ 30.813680] kasan_save_free_info+0x2b/0x50 [ 30.814218] __kasan_slab_free+0x10a/0x190 [ 30.814751] kmem_cache_free+0x10d/0x4d0 [ 30.815263] rcu_core+0x8c8/0x2860 [ 30.815714] __do_softirq+0x1b7/0x7d4 [ 30.816193] [ 30.816410] Last potentially related work creation: [ 30.817003] kasan_save_stack+0x22/0x50 [ 30.817518] __kasan_record_aux_stack+0x8e/0xa0 [ 30.818090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.818740] remove_vma+0x139/0x170 [ 30.819195] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.819889] do_vmi_munmap+0x1f1/0x2b0 [ 30.820372] __vm_munmap+0x138/0x3a0 [ 30.820842] __x64_sys_munmap+0x59/0x80 [ 30.821341] do_syscall_64+0x3f/0x90 [ 30.821835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822480] [ 30.822696] Second to last potentially related work creation: [ 30.823379] kasan_save_stack+0x22/0x50 [ 30.823884] __kasan_record_aux_stack+0x8e/0xa0 [ 30.824455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.825098] remove_vma+0x139/0x170 [ 30.825559] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.826116] do_vmi_munmap+0x1f1/0x2b0 [ 30.826602] mmap_region+0x1f9/0x2660 [ 30.827082] do_mmap+0x854/0xf00 [ 30.827511] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.828007] ksys_mmap_pgoff+0x3af/0x500 [ 30.828508] do_syscall_64+0x3f/0x90 [ 30.828990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829640] [ 30.829856] The buggy address belongs to the object at ffff88801970ed98 [ 30.829856] which belongs to the cache vm_area_struct of size 168 [ 30.831327] The buggy address is located 88 bytes inside of [ 30.831327] freed 168-byte region [ffff88801970ed98, ffff88801970ee40) [ 30.832724] [ 30.832939] The buggy address belongs to the physical page: [ 30.833630] page:000000007e04d733 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1970e [ 30.834734] memcg:ffff888019708d01 [ 30.835168] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.835867] page_type: 0xffffffff() [ 30.836323] raw: 0100000000000200 ffff8880087a0c80 ffffea000036e700 0000000000000009 [ 30.837270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019708d01 [ 30.838213] page dumped because: kasan: bad access detected [ 30.838879] [ 30.839095] Memory state around the buggy address: [ 30.839685] ffff88801970ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.840563] ffff88801970ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.841455] >ffff88801970ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.842312] ^ [ 30.843138] ffff88801970ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.844005] ffff88801970ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.844865] ================================================================== [ 30.845823] Disabling lock debugging due to kernel taint [ 32.921877] BUG: Bad rss-counter state mm:00000000cc6a4ba1 type:MM_FILEPAGES val:33 [ 32.923066] BUG: Bad rss-counter state mm:00000000cc6a4ba1 type:MM_ANONPAGES val:22 [ 33.326167] BUG: Bad rss-counter state mm:000000006f682094 type:MM_FILEPAGES val:33 [ 33.327662] BUG: Bad rss-counter state mm:000000006f682094 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50862' (ECDSA) to the list of known hosts. 2023/06/21 01:36:34 fuzzer started 2023/06/21 01:36:34 dialing manager at localhost:36067 2023/06/21 01:36:34 checking machine... 2023/06/21 01:36:34 checking revisions... [ 34.076787] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:36:34 testing simple program... [ 34.130915] cgroup: Unknown subsys name 'net' [ 34.170320] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801893f028 RCX=0000000000000000 RDX=ffff88801633d1c0 RSI=ffffffff818e34ad RDI=0000000000000007 RBP=ffff88800fcb7b38 RSP=ffff88800fcb7a90 R8 =0000000000000007 R9 =000000000001517f R10=0000000000000003 R11=7962206d65687420 R12=1ffff11001f96f55 R13=ffff888018be4808 R14=ffff88800d974180 R15=ffff888008c150a0 RIP=ffffffff818e3c47 RFL=00000282 [--S----] 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 00007f893ad0b900 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=00007ffec55db000 CR3=000000001959c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f4e0180 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff88800f4e0000 RSP=ffff888008e4f7b0 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000128 R12=000000000001c060 R13=ffff88800f4e01a0 R14=ffff88800f4e0098 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--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 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=00007fb9260207e0 CR3=000000000b3b2000 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=5568bff93958ca9e494ae19544631b96 XMM02=2c67c8bc2e329bc3000000000011b410 XMM03=fb795ef6d65770560000000000122210 XMM04=1880547c7a1e427d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001333e8 XMM06=3ddf19e37204c28d0000000000132250 XMM07=e042d86d42eb936e0000000000122490 XMM08=d9ad0702bea92966000000000011b470 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000