syzkaller login: [ 38.920150] BUG: Bad rss-counter state mm:00000000a02bebdd type:MM_FILEPAGES val:33 [ 38.922173] BUG: Bad rss-counter state mm:00000000a02bebdd type:MM_ANONPAGES val:22 [ 39.100395] ================================================================== [ 39.101361] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.102372] Read of size 8 at addr ffff888018927d08 by task sshd/219 [ 39.103287] [ 39.103522] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.104442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.105499] Call Trace: [ 39.105839] [ 39.106148] dump_stack_lvl+0x91/0xf0 [ 39.106666] print_report+0xcc/0x620 [ 39.107183] ? __virt_addr_valid+0x102/0x340 [ 39.107774] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.108433] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.109086] kasan_report+0xbe/0xf0 [ 39.109616] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.110272] vma_interval_tree_remove+0xc75/0xec0 [ 39.110908] vma_prepare+0xc54/0x11a0 [ 39.111419] __split_vma+0x5af/0x950 [ 39.111926] ? __pfx___split_vma+0x10/0x10 [ 39.112490] ? find_held_lock+0x2c/0x110 [ 39.113047] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.113665] ? lock_is_held_type+0x9f/0x120 [ 39.114238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.114887] ? mtree_range_walk+0x632/0x900 [ 39.115473] ? mas_walk+0x5c7/0x7c0 [ 39.115983] do_vmi_munmap+0x1f1/0x2b0 [ 39.116509] mmap_region+0x1f9/0x2660 [ 39.117025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.117580] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.118345] ? __pfx_lock_acquire+0x10/0x10 [ 39.118914] ? __pfx_mmap_region+0x10/0x10 [ 39.119474] ? security_mmap_addr+0x7d/0xa0 [ 39.120034] ? get_unmapped_area+0x1f5/0x3f0 [ 39.120617] do_mmap+0x854/0xf00 [ 39.121080] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.121617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.122216] ksys_mmap_pgoff+0x3af/0x500 [ 39.122770] do_syscall_64+0x3f/0x90 [ 39.123285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.123974] RIP: 0033:0x7ff1dfbe7d82 [ 39.124461] 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 [ 39.126757] RSP: 002b:00007ffceea59e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.127721] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff1dfbe7d82 [ 39.128633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1df021000 [ 39.129660] RBP: 00007ff1df021000 R08: 0000000000000009 R09: 0000000000001000 [ 39.130702] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e7bfaed90 [ 39.131729] R13: 00007ffceea59eb0 R14: 00007ffceea59ee0 R15: 00007ffceea5a240 [ 39.132769] [ 39.133124] [ 39.133385] Allocated by task 212: [ 39.133884] kasan_save_stack+0x22/0x50 [ 39.134391] kasan_set_track+0x25/0x30 [ 39.134881] __kasan_slab_alloc+0x59/0x70 [ 39.135398] kmem_cache_alloc+0x16b/0x370 [ 39.135901] vm_area_dup+0x20/0x160 [ 39.136349] __split_vma+0x170/0x950 [ 39.136814] split_vma+0xc6/0x110 [ 39.137255] mprotect_fixup+0x8d2/0xb30 [ 39.137757] do_mprotect_pkey+0x87e/0xd40 [ 39.138274] __x64_sys_mprotect+0x78/0xc0 [ 39.138783] do_syscall_64+0x3f/0x90 [ 39.139256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.139890] [ 39.140104] Freed by task 212: [ 39.140494] kasan_save_stack+0x22/0x50 [ 39.140990] kasan_set_track+0x25/0x30 [ 39.141487] kasan_save_free_info+0x2b/0x50 [ 39.142007] __kasan_slab_free+0x10a/0x190 [ 39.142529] kmem_cache_free+0x10d/0x4d0 [ 39.143030] rcu_core+0x8c8/0x2860 [ 39.143473] __do_softirq+0x1b7/0x7d4 [ 39.143950] [ 39.144169] Last potentially related work creation: [ 39.144750] kasan_save_stack+0x22/0x50 [ 39.145248] __kasan_record_aux_stack+0x8e/0xa0 [ 39.145832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.146461] remove_vma+0x139/0x170 [ 39.146906] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.147458] do_vmi_munmap+0x1f1/0x2b0 [ 39.147935] __vm_munmap+0x138/0x3a0 [ 39.148399] __x64_sys_munmap+0x59/0x80 [ 39.148895] do_syscall_64+0x3f/0x90 [ 39.149358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.149995] [ 39.150207] Second to last potentially related work creation: [ 39.150894] kasan_save_stack+0x22/0x50 [ 39.151389] __kasan_record_aux_stack+0x8e/0xa0 [ 39.151956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.152584] remove_vma+0x139/0x170 [ 39.153027] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.153604] do_vmi_munmap+0x1f1/0x2b0 [ 39.154086] __vm_munmap+0x138/0x3a0 [ 39.154548] elf_map+0x26f/0x310 [ 39.154988] load_elf_binary+0x3417/0x5030 [ 39.155516] bprm_execve+0x803/0x1940 [ 39.155987] do_execveat_common+0x734/0x8e0 [ 39.156505] __x64_sys_execve+0x93/0xc0 [ 39.156987] do_syscall_64+0x3f/0x90 [ 39.157459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.158100] [ 39.158314] The buggy address belongs to the object at ffff888018927cb0 [ 39.158314] which belongs to the cache vm_area_struct of size 168 [ 39.159763] The buggy address is located 88 bytes inside of [ 39.159763] freed 168-byte region [ffff888018927cb0, ffff888018927d58) [ 39.161145] [ 39.161357] The buggy address belongs to the physical page: [ 39.162012] page:00000000524bb60c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18927 [ 39.163087] memcg:ffff88801828cc01 [ 39.163512] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.164149] page_type: 0xffffffff() [ 39.164594] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.165508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801828cc01 [ 39.166403] page dumped because: kasan: bad access detected [ 39.167059] [ 39.167276] Memory state around the buggy address: [ 39.167849] ffff888018927c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.168696] ffff888018927c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.169549] >ffff888018927d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.170392] ^ [ 39.170835] ffff888018927d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.171684] ffff888018927e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.172539] ================================================================== [ 39.173622] Disabling lock debugging due to kernel taint [ 41.165256] BUG: Bad rss-counter state mm:000000001b175951 type:MM_FILEPAGES val:33 [ 41.166646] BUG: Bad rss-counter state mm:000000001b175951 type:MM_ANONPAGES val:22 [ 41.664796] BUG: Bad rss-counter state mm:00000000dd961947 type:MM_FILEPAGES val:33 [ 41.665837] BUG: Bad rss-counter state mm:00000000dd961947 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13865' (ECDSA) to the list of known hosts. 2023/06/20 06:52:51 fuzzer started 2023/06/20 06:52:51 dialing manager at localhost:44161 2023/06/20 06:52:51 checking machine... 2023/06/20 06:52:51 checking revisions... [ 42.431358] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:52:51 testing simple program... [ 42.474223] cgroup: Unknown subsys name 'net' [ 42.529873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:52:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009afa438 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800dd6f4f8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000c3c00000c3c R12=0000000000000000 R13=0000000000000087 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8450bdc0 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 00007f09e5c8e900 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=00007f09e6245618 CR3=000000000eb68000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f3366f01770 CR3=000000000ba04000 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=2031353a32353a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a32353a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000