syzkaller login: [ 39.981651] BUG: Bad rss-counter state mm:000000008e5444f5 type:MM_FILEPAGES val:33 [ 39.983152] BUG: Bad rss-counter state mm:000000008e5444f5 type:MM_ANONPAGES val:22 [ 40.132095] ================================================================== [ 40.133188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.134289] Read of size 8 at addr ffff88800ece14e0 by task sshd/219 [ 40.135328] [ 40.135593] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.136641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.137711] Call Trace: [ 40.138031] [ 40.138313] dump_stack_lvl+0x91/0xf0 [ 40.138798] print_report+0xcc/0x620 [ 40.139276] ? __virt_addr_valid+0x102/0x340 [ 40.139816] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.140442] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.141052] kasan_report+0xbe/0xf0 [ 40.141523] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.142141] vma_interval_tree_remove+0xc75/0xec0 [ 40.142738] vma_prepare+0xc54/0x11a0 [ 40.143209] __split_vma+0x5af/0x950 [ 40.143674] ? __pfx___split_vma+0x10/0x10 [ 40.144199] ? find_held_lock+0x2c/0x110 [ 40.144744] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.145305] ? lock_is_held_type+0x9f/0x120 [ 40.145843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.146440] ? mtree_range_walk+0x632/0x900 [ 40.146990] ? mas_walk+0x5c7/0x7c0 [ 40.147467] do_vmi_munmap+0x1f1/0x2b0 [ 40.147953] mmap_region+0x1f9/0x2660 [ 40.148453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.148973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.149683] ? __pfx_lock_acquire+0x10/0x10 [ 40.150210] ? __pfx_mmap_region+0x10/0x10 [ 40.150740] ? security_mmap_addr+0x7d/0xa0 [ 40.151265] ? get_unmapped_area+0x1f5/0x3f0 [ 40.151823] do_mmap+0x854/0xf00 [ 40.152260] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.152763] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.153316] ksys_mmap_pgoff+0x3af/0x500 [ 40.153828] do_syscall_64+0x3f/0x90 [ 40.154309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.154952] RIP: 0033:0x7fe3ea78cd82 [ 40.155405] 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 [ 40.157562] RSP: 002b:00007ffdcac3bb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.158458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3ea78cd82 [ 40.159296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3e9bc6000 [ 40.160139] RBP: 00007fe3e9bc6000 R08: 0000000000000009 R09: 0000000000001000 [ 40.160997] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558313237ec0 [ 40.161832] R13: 00007ffdcac3bb80 R14: 00007ffdcac3bbb0 R15: 00007ffdcac3bf10 [ 40.162674] [ 40.162962] [ 40.163172] Allocated by task 212: [ 40.163594] kasan_save_stack+0x22/0x50 [ 40.164096] kasan_set_track+0x25/0x30 [ 40.164590] __kasan_slab_alloc+0x59/0x70 [ 40.165105] kmem_cache_alloc+0x16b/0x370 [ 40.165621] vm_area_dup+0x20/0x160 [ 40.166071] __split_vma+0x170/0x950 [ 40.166533] split_vma+0xc6/0x110 [ 40.166970] mprotect_fixup+0x8d2/0xb30 [ 40.167462] do_mprotect_pkey+0x87e/0xd40 [ 40.167977] __x64_sys_mprotect+0x78/0xc0 [ 40.168501] do_syscall_64+0x3f/0x90 [ 40.168969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.169611] [ 40.169828] Freed by task 212: [ 40.170213] kasan_save_stack+0x22/0x50 [ 40.170712] kasan_set_track+0x25/0x30 [ 40.171200] kasan_save_free_info+0x2b/0x50 [ 40.171733] __kasan_slab_free+0x10a/0x190 [ 40.172261] kmem_cache_free+0x10d/0x4d0 [ 40.172785] rcu_core+0x8c8/0x2860 [ 40.173226] __do_softirq+0x1b7/0x7d4 [ 40.173703] [ 40.173936] Last potentially related work creation: [ 40.174537] kasan_save_stack+0x22/0x50 [ 40.175045] __kasan_record_aux_stack+0x8e/0xa0 [ 40.175626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.176266] remove_vma+0x139/0x170 [ 40.176727] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.177293] do_vmi_munmap+0x1f1/0x2b0 [ 40.177788] __vm_munmap+0x138/0x3a0 [ 40.178258] __x64_sys_munmap+0x59/0x80 [ 40.178766] do_syscall_64+0x3f/0x90 [ 40.179233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.179874] [ 40.180088] The buggy address belongs to the object at ffff88800ece1488 [ 40.180088] which belongs to the cache vm_area_struct of size 168 [ 40.181578] The buggy address is located 88 bytes inside of [ 40.181578] freed 168-byte region [ffff88800ece1488, ffff88800ece1530) [ 40.183007] [ 40.183227] The buggy address belongs to the physical page: [ 40.183890] page:00000000f7a1a5d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xece1 [ 40.184978] memcg:ffff88800d8bc801 [ 40.185412] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.186110] page_type: 0xffffffff() [ 40.186568] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.187493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8bc801 [ 40.188406] page dumped because: kasan: bad access detected [ 40.189074] [ 40.189291] Memory state around the buggy address: [ 40.189870] ffff88800ece1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.190725] ffff88800ece1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.191597] >ffff88800ece1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.192479] ^ [ 40.193237] ffff88800ece1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.194107] ffff88800ece1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.194963] ================================================================== [ 40.196079] Disabling lock debugging due to kernel taint [ 42.289233] BUG: Bad rss-counter state mm:000000009a2bcaa6 type:MM_FILEPAGES val:33 [ 42.290764] BUG: Bad rss-counter state mm:000000009a2bcaa6 type:MM_ANONPAGES val:22 [ 42.815707] BUG: Bad rss-counter state mm:000000005abbcf4d type:MM_FILEPAGES val:33 [ 42.816749] BUG: Bad rss-counter state mm:000000005abbcf4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62377' (ECDSA) to the list of known hosts. 2023/06/19 20:21:01 fuzzer started 2023/06/19 20:21:02 dialing manager at localhost:44161 2023/06/19 20:21:02 checking machine... 2023/06/19 20:21:02 checking revisions... [ 43.576636] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:21:02 testing simple program... [ 43.617583] cgroup: Unknown subsys name 'net' [ 43.677113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:21:00 Registers: info registers vcpu 0 RAX=0000000080000101 RBX=0000000000000000 RCX=0000000080000101 RDX=0000000000000000 RSI=ffffffff814c8504 RDI=ffffffff8542aab4 RBP=0000000000000000 RSP=ffff88806ce099d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88800f275880 RIP=ffffffff814c07f1 RFL=00000293 [--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 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=00007ffeac06bdd8 CR3=0000000013a52000 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=2031303a31323a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a31323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000029b03054 RCX=ffff88806c4182a0 RDX=000000000000000b RSI=ffffffff83664990 RDI=00000000e9bc64e4 RBP=ffff88800f22b960 RSP=ffff88801cdff4e0 R8 =0000000001fe938d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff88801cdff568 R15=000000000000000b RIP=ffffffff82270f3c RFL=00000206 [-----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 00007fc79ad56900 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=00007fc79b30d618 CR3=000000000f6a2000 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=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