syzkaller login: [ 54.961561] BUG: Bad rss-counter state mm:00000000b1258cff type:MM_FILEPAGES val:33 [ 54.962586] BUG: Bad rss-counter state mm:00000000b1258cff type:MM_ANONPAGES val:22 [ 55.129102] ================================================================== [ 55.130235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.131128] Read of size 8 at addr ffff888019837df0 by task sshd/219 [ 55.131950] [ 55.132161] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.132963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.133952] Call Trace: [ 55.134276] [ 55.134554] dump_stack_lvl+0x91/0xf0 [ 55.135038] print_report+0xcc/0x620 [ 55.135515] ? __virt_addr_valid+0x102/0x340 [ 55.136064] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.136673] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.137285] kasan_report+0xbe/0xf0 [ 55.137783] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.138407] vma_interval_tree_remove+0xc75/0xec0 [ 55.139003] vma_prepare+0xc54/0x11a0 [ 55.139481] __split_vma+0x5af/0x950 [ 55.139952] ? __pfx___split_vma+0x10/0x10 [ 55.140483] ? find_held_lock+0x2c/0x110 [ 55.141005] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.141592] ? lock_is_held_type+0x9f/0x120 [ 55.142129] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.142754] ? mtree_range_walk+0x632/0x900 [ 55.143314] ? mas_walk+0x5c7/0x7c0 [ 55.143804] do_vmi_munmap+0x1f1/0x2b0 [ 55.144312] mmap_region+0x1f9/0x2660 [ 55.144817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.145346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.146104] ? __pfx_lock_acquire+0x10/0x10 [ 55.146666] ? __pfx_mmap_region+0x10/0x10 [ 55.147220] ? security_mmap_addr+0x7d/0xa0 [ 55.147773] ? get_unmapped_area+0x1f5/0x3f0 [ 55.148344] do_mmap+0x854/0xf00 [ 55.148805] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.149313] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.149904] ksys_mmap_pgoff+0x3af/0x500 [ 55.150433] do_syscall_64+0x3f/0x90 [ 55.150933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.151597] RIP: 0033:0x7fca687a5d82 [ 55.152075] 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 [ 55.154317] RSP: 002b:00007ffc87de8228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.155275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca687a5d82 [ 55.156163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca67bdf000 [ 55.157047] RBP: 00007fca67bdf000 R08: 0000000000000009 R09: 0000000000001000 [ 55.157940] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c83cddec0 [ 55.158836] R13: 00007ffc87de8240 R14: 00007ffc87de8270 R15: 00007ffc87de85d0 [ 55.159723] [ 55.160026] [ 55.160251] Allocated by task 212: [ 55.160694] kasan_save_stack+0x22/0x50 [ 55.161211] kasan_set_track+0x25/0x30 [ 55.161756] __kasan_slab_alloc+0x59/0x70 [ 55.162298] kmem_cache_alloc+0x16b/0x370 [ 55.162842] vm_area_dup+0x20/0x160 [ 55.163316] __split_vma+0x170/0x950 [ 55.163799] split_vma+0xc6/0x110 [ 55.164262] mprotect_fixup+0x8d2/0xb30 [ 55.164788] do_mprotect_pkey+0x87e/0xd40 [ 55.165324] __x64_sys_mprotect+0x78/0xc0 [ 55.165880] do_syscall_64+0x3f/0x90 [ 55.166372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.167028] [ 55.167250] Freed by task 212: [ 55.167652] kasan_save_stack+0x22/0x50 [ 55.168179] kasan_set_track+0x25/0x30 [ 55.168692] kasan_save_free_info+0x2b/0x50 [ 55.169251] __kasan_slab_free+0x10a/0x190 [ 55.169826] kmem_cache_free+0x10d/0x4d0 [ 55.170355] rcu_core+0x8c8/0x2860 [ 55.170826] __do_softirq+0x1b7/0x7d4 [ 55.171317] [ 55.171536] Last potentially related work creation: [ 55.172132] kasan_save_stack+0x22/0x50 [ 55.172659] __kasan_record_aux_stack+0x8e/0xa0 [ 55.173258] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.173955] remove_vma+0x139/0x170 [ 55.174420] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.174996] do_vmi_munmap+0x1f1/0x2b0 [ 55.175490] __vm_munmap+0x138/0x3a0 [ 55.175986] __x64_sys_munmap+0x59/0x80 [ 55.176502] do_syscall_64+0x3f/0x90 [ 55.177002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.177679] [ 55.177897] Second to last potentially related work creation: [ 55.178610] kasan_save_stack+0x22/0x50 [ 55.179139] __kasan_record_aux_stack+0x8e/0xa0 [ 55.179731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.180397] remove_vma+0x139/0x170 [ 55.180869] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.181443] do_vmi_munmap+0x1f1/0x2b0 [ 55.181956] mmap_region+0x1f9/0x2660 [ 55.182463] do_mmap+0x854/0xf00 [ 55.182902] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.183406] ksys_mmap_pgoff+0x3af/0x500 [ 55.183931] do_syscall_64+0x3f/0x90 [ 55.184427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.185092] [ 55.185312] The buggy address belongs to the object at ffff888019837d98 [ 55.185312] which belongs to the cache vm_area_struct of size 168 [ 55.186861] The buggy address is located 88 bytes inside of [ 55.186861] freed 168-byte region [ffff888019837d98, ffff888019837e40) [ 55.188336] [ 55.188563] The buggy address belongs to the physical page: [ 55.189244] page:00000000ebb6be4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19837 [ 55.190397] memcg:ffff888015f89c01 [ 55.190842] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.191513] page_type: 0xffffffff() [ 55.191989] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 55.192929] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f89c01 [ 55.193884] page dumped because: kasan: bad access detected [ 55.194585] [ 55.194812] Memory state around the buggy address: [ 55.195413] ffff888019837c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 55.196298] ffff888019837d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 55.197196] >ffff888019837d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 55.198086] ^ [ 55.198942] ffff888019837e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 55.199842] ffff888019837e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.200753] ================================================================== [ 55.201792] Disabling lock debugging due to kernel taint [ 57.203970] BUG: Bad rss-counter state mm:0000000033a005f6 type:MM_FILEPAGES val:33 [ 57.205035] BUG: Bad rss-counter state mm:0000000033a005f6 type:MM_ANONPAGES val:22 [ 57.693996] BUG: Bad rss-counter state mm:00000000785b414e type:MM_FILEPAGES val:33 [ 57.695178] BUG: Bad rss-counter state mm:00000000785b414e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41813' (ECDSA) to the list of known hosts. 2023/06/19 21:53:56 fuzzer started 2023/06/19 21:53:56 dialing manager at localhost:44161 2023/06/19 21:53:56 checking machine... 2023/06/19 21:53:56 checking revisions... [ 58.482914] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:53:56 testing simple program... [ 58.542840] cgroup: Unknown subsys name 'net' [ 58.581992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:53:40 Registers: info registers vcpu 0 RAX=ffff88800fb58001 RBX=ffff88800fb57f58 RCX=0000000000000001 RDX=ffff88800fb57f60 RSI=ffff88800fb57f48 RDI=ffff88806ce09aa8 RBP=ffff88800fb50000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800fb57f48 R15=ffff88806ce09a98 RIP=ffffffff81131cda 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 00007f2a0dda0900 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=00007f2a0e355650 CR3=00000000166b0000 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=ffffed1002876fa8 RBX=1ffff11002876fa8 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff814d45c6 RDI=ffffffff852be548 RBP=ffff88801033b680 RSP=ffff8880143b7d40 R8 =0000000000000006 R9 =0000000000000101 R10=0000000040000000 R11=0000000000000000 R12=ffff88801033ba70 R13=ffff88801033ba60 R14=ffff8880143b7e30 R15=000000007fff0000 RIP=ffffffff81249804 RFL=00000212 [----A--] 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 00007f57305c4900 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=00007f572fa21770 CR3=000000000c840000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=883c351942811c1e00000000000ae988 XMM05=9e4f7c5cb71f010c0000000000136000 XMM06=dfcdbad4f1609c370000000000134b28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000