syzkaller login: [ 30.014971] BUG: Bad rss-counter state mm:00000000ab81bd49 type:MM_FILEPAGES val:33 [ 30.015947] BUG: Bad rss-counter state mm:00000000ab81bd49 type:MM_ANONPAGES val:22 [ 30.184910] ================================================================== [ 30.185898] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.186915] Read of size 8 at addr ffff88800ec9a228 by task sshd/221 [ 30.187825] [ 30.188058] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.188991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.190045] Call Trace: [ 30.190386] [ 30.190689] dump_stack_lvl+0x91/0xf0 [ 30.191221] print_report+0xcc/0x620 [ 30.191752] ? __virt_addr_valid+0x102/0x340 [ 30.192344] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.193016] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.193678] kasan_report+0xbe/0xf0 [ 30.194184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.194865] vma_interval_tree_remove+0xc75/0xec0 [ 30.195521] vma_prepare+0xc54/0x11a0 [ 30.196072] __split_vma+0x5af/0x950 [ 30.196595] ? __pfx___split_vma+0x10/0x10 [ 30.197170] ? find_held_lock+0x2c/0x110 [ 30.197738] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.198353] ? lock_is_held_type+0x9f/0x120 [ 30.198942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.199604] ? mtree_range_walk+0x632/0x900 [ 30.200211] ? mas_walk+0x5c7/0x7c0 [ 30.200735] do_vmi_munmap+0x1f1/0x2b0 [ 30.201264] mmap_region+0x1f9/0x2660 [ 30.201790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.202347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.203121] ? __pfx_lock_acquire+0x10/0x10 [ 30.203700] ? __pfx_mmap_region+0x10/0x10 [ 30.204284] ? security_mmap_addr+0x7d/0xa0 [ 30.204860] ? get_unmapped_area+0x1f5/0x3f0 [ 30.205469] do_mmap+0x854/0xf00 [ 30.205952] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.206486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.207100] ksys_mmap_pgoff+0x3af/0x500 [ 30.207656] do_syscall_64+0x3f/0x90 [ 30.208203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.208917] RIP: 0033:0x7f22f2d18d82 [ 30.209412] 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 [ 30.211737] RSP: 002b:00007ffef7caa018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.212740] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22f2d18d82 [ 30.213672] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22f2152000 [ 30.214588] RBP: 00007f22f2152000 R08: 0000000000000009 R09: 0000000000001000 [ 30.215488] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570d243bec0 [ 30.216397] R13: 00007ffef7caa030 R14: 00007ffef7caa060 R15: 00007ffef7caa3c0 [ 30.217316] [ 30.217630] [ 30.217857] Allocated by task 214: [ 30.218312] kasan_save_stack+0x22/0x50 [ 30.218847] kasan_set_track+0x25/0x30 [ 30.219370] __kasan_slab_alloc+0x59/0x70 [ 30.219941] kmem_cache_alloc+0x16b/0x370 [ 30.220487] vm_area_dup+0x20/0x160 [ 30.220971] __split_vma+0x170/0x950 [ 30.221465] split_vma+0xc6/0x110 [ 30.221932] mprotect_fixup+0x8d2/0xb30 [ 30.222465] do_mprotect_pkey+0x87e/0xd40 [ 30.223016] __x64_sys_mprotect+0x78/0xc0 [ 30.223587] do_syscall_64+0x3f/0x90 [ 30.224111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.224810] [ 30.225049] Freed by task 214: [ 30.225477] kasan_save_stack+0x22/0x50 [ 30.226025] kasan_set_track+0x25/0x30 [ 30.226561] kasan_save_free_info+0x2b/0x50 [ 30.227147] __kasan_slab_free+0x10a/0x190 [ 30.227729] kmem_cache_free+0x10d/0x4d0 [ 30.228299] rcu_core+0x8c8/0x2860 [ 30.228804] __do_softirq+0x1b7/0x7d4 [ 30.229326] [ 30.229559] Last potentially related work creation: [ 30.230199] kasan_save_stack+0x22/0x50 [ 30.230750] __kasan_record_aux_stack+0x8e/0xa0 [ 30.231370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.232074] remove_vma+0x139/0x170 [ 30.232568] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.233177] do_vmi_munmap+0x1f1/0x2b0 [ 30.233708] __vm_munmap+0x138/0x3a0 [ 30.234218] __x64_sys_munmap+0x59/0x80 [ 30.234760] do_syscall_64+0x3f/0x90 [ 30.235278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.235990] [ 30.236225] The buggy address belongs to the object at ffff88800ec9a1d0 [ 30.236225] which belongs to the cache vm_area_struct of size 168 [ 30.237850] The buggy address is located 88 bytes inside of [ 30.237850] freed 168-byte region [ffff88800ec9a1d0, ffff88800ec9a278) [ 30.239391] [ 30.239628] The buggy address belongs to the physical page: [ 30.240350] page:000000006a6d9e01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec9a [ 30.241525] memcg:ffff88800ee8c801 [ 30.241992] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.242707] page_type: 0xffffffff() [ 30.243199] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.244214] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee8c801 [ 30.245216] page dumped because: kasan: bad access detected [ 30.245938] [ 30.246168] Memory state around the buggy address: [ 30.246799] ffff88800ec9a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.247720] ffff88800ec9a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.248657] >ffff88800ec9a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.249577] ^ [ 30.250180] ffff88800ec9a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.251108] ffff88800ec9a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.252027] ================================================================== [ 30.253095] Disabling lock debugging due to kernel taint [ 31.552280] BUG: Bad rss-counter state mm:0000000043ab381d type:MM_FILEPAGES val:33 [ 31.553270] BUG: Bad rss-counter state mm:0000000043ab381d type:MM_ANONPAGES val:22 [ 31.886388] BUG: Bad rss-counter state mm:000000003731c050 type:MM_FILEPAGES val:33 [ 31.887465] BUG: Bad rss-counter state mm:000000003731c050 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8489' (ECDSA) to the list of known hosts. 2023/06/20 18:27:15 fuzzer started 2023/06/20 18:27:16 dialing manager at localhost:36067 2023/06/20 18:27:16 checking machine... 2023/06/20 18:27:16 checking revisions... [ 32.639193] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:27:16 testing simple program... [ 32.691483] cgroup: Unknown subsys name 'net' [ 32.747823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1381 RSI=ffffffff8118ddc3 RDI=ffff88806ce09b6c RBP=ffff88806ce09c08 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800f510000 R15=ffff88800ec02410 RIP=ffffffff813ad547 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 00007f2c9db7c900 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=00007f2c9cf74610 CR3=00000000136e8000 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=5ba8b3a07dcdfda5b346b23bfb2cd905 XMM02=000000000011d198d59e07bde36eea69 XMM03=000000000011d2c0ec2efd57dc4c00df XMM04=50e80443ce2c90af00000000000ae988 XMM05=f28d3c993b6e348e0000000000132850 XMM06=c291bd5c70af25b90000000000131640 XMM07=fb795ef6d65770560000000000121988 XMM08=2c67c8bc2e329bc3000000000011d2c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880180f7a00 RCX=0000000000000001 RDX=1ffff1100301ef42 RSI=ffffffff846000aa RDI=ffff8880180f7a10 RBP=ffff8880180f79d0 RSP=ffff8880180f7918 R8 =0000000000000001 R9 =ffff8880180f7978 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880180f7a00 R13=0000000000000000 R14=ffff888009a751c0 R15=0000000000000dc0 RIP=ffffffff813ad496 RFL=00000296 [--S-AP-] 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 00007fd404636900 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=00007fd404bee0b0 CR3=000000000eaae000 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