syzkaller login: [ 36.030468] BUG: Bad rss-counter state mm:0000000031b819bf type:MM_FILEPAGES val:33 [ 36.031667] BUG: Bad rss-counter state mm:0000000031b819bf type:MM_ANONPAGES val:22 [ 36.189044] ================================================================== [ 36.189952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.190883] Read of size 8 at addr ffff888016551140 by task sshd/227 [ 36.191647] [ 36.191874] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.192925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.193906] Call Trace: [ 36.194228] [ 36.194519] dump_stack_lvl+0x91/0xf0 [ 36.195032] print_report+0xcc/0x620 [ 36.195512] ? __virt_addr_valid+0x102/0x340 [ 36.196063] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.196681] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.197313] kasan_report+0xbe/0xf0 [ 36.197794] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.198418] vma_interval_tree_remove+0xc75/0xec0 [ 36.199022] vma_prepare+0xc54/0x11a0 [ 36.199508] __split_vma+0x5af/0x950 [ 36.199984] ? __pfx___split_vma+0x10/0x10 [ 36.200517] ? find_held_lock+0x2c/0x110 [ 36.201054] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.201628] ? lock_is_held_type+0x9f/0x120 [ 36.202170] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.202777] ? mtree_range_walk+0x632/0x900 [ 36.203339] ? mas_walk+0x5c7/0x7c0 [ 36.203816] do_vmi_munmap+0x1f1/0x2b0 [ 36.204316] mmap_region+0x1f9/0x2660 [ 36.204818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.205338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.206054] ? __pfx_lock_acquire+0x10/0x10 [ 36.206592] ? __pfx_mmap_region+0x10/0x10 [ 36.207123] ? security_mmap_addr+0x7d/0xa0 [ 36.207649] ? get_unmapped_area+0x1f5/0x3f0 [ 36.208202] do_mmap+0x854/0xf00 [ 36.208643] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.209150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.209714] ksys_mmap_pgoff+0x3af/0x500 [ 36.210218] do_syscall_64+0x3f/0x90 [ 36.210695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.211340] RIP: 0033:0x7fdb54474d82 [ 36.211794] 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 [ 36.213931] RSP: 002b:00007fffff5232a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.214831] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb54474d82 [ 36.215677] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb538ae000 [ 36.216518] RBP: 00007fdb538ae000 R08: 0000000000000009 R09: 0000000000001000 [ 36.217378] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576a8a70ec0 [ 36.218217] R13: 00007fffff5232c0 R14: 00007fffff5232f0 R15: 00007fffff523650 [ 36.219075] [ 36.219374] [ 36.219596] Allocated by task 220: [ 36.220024] kasan_save_stack+0x22/0x50 [ 36.220536] kasan_set_track+0x25/0x30 [ 36.221039] __kasan_slab_alloc+0x59/0x70 [ 36.221568] kmem_cache_alloc+0x16b/0x370 [ 36.222084] vm_area_dup+0x20/0x160 [ 36.222538] __split_vma+0x170/0x950 [ 36.223015] split_vma+0xc6/0x110 [ 36.223462] mprotect_fixup+0x8d2/0xb30 [ 36.223969] do_mprotect_pkey+0x87e/0xd40 [ 36.224500] __x64_sys_mprotect+0x78/0xc0 [ 36.225047] do_syscall_64+0x3f/0x90 [ 36.225525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.226173] [ 36.226391] Freed by task 220: [ 36.226786] kasan_save_stack+0x22/0x50 [ 36.227300] kasan_set_track+0x25/0x30 [ 36.227796] kasan_save_free_info+0x2b/0x50 [ 36.228336] __kasan_slab_free+0x10a/0x190 [ 36.228872] kmem_cache_free+0x10d/0x4d0 [ 36.229381] rcu_core+0x8c8/0x2860 [ 36.229827] __do_softirq+0x1b7/0x7d4 [ 36.230308] [ 36.230525] Last potentially related work creation: [ 36.231116] kasan_save_stack+0x22/0x50 [ 36.231621] __kasan_record_aux_stack+0x8e/0xa0 [ 36.232197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.232852] remove_vma+0x139/0x170 [ 36.233306] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.233972] do_vmi_munmap+0x1f1/0x2b0 [ 36.234459] __vm_munmap+0x138/0x3a0 [ 36.234927] __x64_sys_munmap+0x59/0x80 [ 36.235428] do_syscall_64+0x3f/0x90 [ 36.235898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.236541] [ 36.236774] The buggy address belongs to the object at ffff8880165510e8 [ 36.236774] which belongs to the cache vm_area_struct of size 168 [ 36.238248] The buggy address is located 88 bytes inside of [ 36.238248] freed 168-byte region [ffff8880165510e8, ffff888016551190) [ 36.239639] [ 36.239857] The buggy address belongs to the physical page: [ 36.240514] page:00000000b3da148c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16551 [ 36.241613] memcg:ffff888016d5f801 [ 36.242044] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.242684] page_type: 0xffffffff() [ 36.243133] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.244047] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d5f801 [ 36.244974] page dumped because: kasan: bad access detected [ 36.245642] [ 36.245859] Memory state around the buggy address: [ 36.246444] ffff888016551000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.247303] ffff888016551080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.248162] >ffff888016551100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.249049] ^ [ 36.249701] ffff888016551180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.250579] ffff888016551200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.251446] ================================================================== [ 36.252378] Disabling lock debugging due to kernel taint [ 38.212506] BUG: Bad rss-counter state mm:0000000000119074 type:MM_FILEPAGES val:33 [ 38.213623] BUG: Bad rss-counter state mm:0000000000119074 type:MM_ANONPAGES val:22 [ 38.649935] BUG: Bad rss-counter state mm:00000000f5a07bac type:MM_FILEPAGES val:33 [ 38.651218] BUG: Bad rss-counter state mm:00000000f5a07bac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55783' (ECDSA) to the list of known hosts. 2023/06/19 20:46:23 fuzzer started 2023/06/19 20:46:23 dialing manager at localhost:44161 2023/06/19 20:46:23 checking machine... 2023/06/19 20:46:23 checking revisions... [ 39.378763] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:46:23 testing simple program... [ 39.423921] cgroup: Unknown subsys name 'net' [ 39.480947] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:18 Registers: info registers vcpu 0 RAX=ffffffff84600055 RBX=ffffffff86053a30 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a30 RSP=ffff888016c7f7c0 R8 =ffffffff864b9d50 R9 =ffff888016c7f8b8 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc99 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 00007f9d7311e900 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=00007f9d736d5618 CR3=00000000143a2000 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=2033323a36343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a36343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf09e58 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e10 RDI=ffff88806cf09e10 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e10 R15=ffff88806cf09a98 RIP=ffffffff81131236 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 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=00007f6faae35a60 CR3=000000000d84c000 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=b0b0780df07eccb1ed45e1ee17a4ea16 XMM02=000000000011cca8eff9b2d0a8fce9cb XMM03=000000000011cd782c67c8bc2e329bc3 XMM04=829046435560a50d00000000000ae988 XMM05=76e6dff43123406f00000000001344b0 XMM06=e8008b1642ea3e6000000000001331e0 XMM07=e042d86d42eb936e0000000000123d40 XMM08=90b621662c9ab46c000000000011cd78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000