syzkaller login: [ 40.944272] BUG: Bad rss-counter state mm:00000000154793ca type:MM_FILEPAGES val:33 [ 40.945745] BUG: Bad rss-counter state mm:00000000154793ca type:MM_ANONPAGES val:22 [ 41.117462] ================================================================== [ 41.118559] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.119711] Read of size 8 at addr ffff88800db53c20 by task sshd/219 [ 41.120708] [ 41.120931] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.121780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.122746] Call Trace: [ 41.123066] [ 41.123369] dump_stack_lvl+0x91/0xf0 [ 41.123860] print_report+0xcc/0x620 [ 41.124340] ? __virt_addr_valid+0x102/0x340 [ 41.124893] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.125511] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.126124] kasan_report+0xbe/0xf0 [ 41.126596] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.127217] vma_interval_tree_remove+0xc75/0xec0 [ 41.127835] vma_prepare+0xc54/0x11a0 [ 41.128312] __split_vma+0x5af/0x950 [ 41.128793] ? __pfx___split_vma+0x10/0x10 [ 41.129324] ? find_held_lock+0x2c/0x110 [ 41.129840] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.130396] ? lock_is_held_type+0x9f/0x120 [ 41.130930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.131547] ? mtree_range_walk+0x632/0x900 [ 41.132095] ? mas_walk+0x5c7/0x7c0 [ 41.132571] do_vmi_munmap+0x1f1/0x2b0 [ 41.133080] mmap_region+0x1f9/0x2660 [ 41.133575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.134088] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.134804] ? __pfx_lock_acquire+0x10/0x10 [ 41.135347] ? __pfx_mmap_region+0x10/0x10 [ 41.135886] ? security_mmap_addr+0x7d/0xa0 [ 41.136421] ? get_unmapped_area+0x1f5/0x3f0 [ 41.136966] do_mmap+0x854/0xf00 [ 41.137399] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.137903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.138466] ksys_mmap_pgoff+0x3af/0x500 [ 41.138975] do_syscall_64+0x3f/0x90 [ 41.139456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.140094] RIP: 0033:0x7f658d50ad82 [ 41.140553] 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 [ 41.142655] RSP: 002b:00007ffd36d75e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.143570] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f658d50ad82 [ 41.144407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f658c944000 [ 41.145246] RBP: 00007f658c944000 R08: 0000000000000009 R09: 0000000000001000 [ 41.146084] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfcabedb20 [ 41.146919] R13: 00007ffd36d75e40 R14: 00007ffd36d75e70 R15: 00007ffd36d761d0 [ 41.147783] [ 41.148072] [ 41.148288] Allocated by task 212: [ 41.148711] kasan_save_stack+0x22/0x50 [ 41.149214] kasan_set_track+0x25/0x30 [ 41.149709] __kasan_slab_alloc+0x59/0x70 [ 41.150234] kmem_cache_alloc+0x16b/0x370 [ 41.150762] vm_area_dup+0x20/0x160 [ 41.151218] __split_vma+0x170/0x950 [ 41.151705] split_vma+0xc6/0x110 [ 41.152148] mprotect_fixup+0x8d2/0xb30 [ 41.152648] do_mprotect_pkey+0x87e/0xd40 [ 41.153178] __x64_sys_mprotect+0x78/0xc0 [ 41.153697] do_syscall_64+0x3f/0x90 [ 41.154174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.154825] [ 41.155037] Freed by task 212: [ 41.155453] kasan_save_stack+0x22/0x50 [ 41.155959] kasan_set_track+0x25/0x30 [ 41.156447] kasan_save_free_info+0x2b/0x50 [ 41.156973] __kasan_slab_free+0x10a/0x190 [ 41.157502] kmem_cache_free+0x10d/0x4d0 [ 41.158011] rcu_core+0x8c8/0x2860 [ 41.158454] __do_softirq+0x1b7/0x7d4 [ 41.158925] [ 41.159140] Last potentially related work creation: [ 41.159725] kasan_save_stack+0x22/0x50 [ 41.160224] __kasan_record_aux_stack+0x8e/0xa0 [ 41.160798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.161519] remove_vma+0x139/0x170 [ 41.161968] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.162521] do_vmi_munmap+0x1f1/0x2b0 [ 41.163008] __vm_munmap+0x138/0x3a0 [ 41.163489] __x64_sys_munmap+0x59/0x80 [ 41.163986] do_syscall_64+0x3f/0x90 [ 41.164457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.165091] [ 41.165306] The buggy address belongs to the object at ffff88800db53bc8 [ 41.165306] which belongs to the cache vm_area_struct of size 168 [ 41.166760] The buggy address is located 88 bytes inside of [ 41.166760] freed 168-byte region [ffff88800db53bc8, ffff88800db53c70) [ 41.168159] [ 41.168371] The buggy address belongs to the physical page: [ 41.169024] page:0000000020814824 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb53 [ 41.170115] memcg:ffff888018fbb601 [ 41.170551] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.171222] page_type: 0xffffffff() [ 41.171700] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.172658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fbb601 [ 41.173610] page dumped because: kasan: bad access detected [ 41.174288] [ 41.174512] Memory state around the buggy address: [ 41.175108] ffff88800db53b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.176002] ffff88800db53b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.176900] >ffff88800db53c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.177789] ^ [ 41.178348] ffff88800db53c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.179248] ffff88800db53d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.180136] ================================================================== [ 41.181108] Disabling lock debugging due to kernel taint [ 43.236733] BUG: Bad rss-counter state mm:0000000075bca679 type:MM_FILEPAGES val:33 [ 43.237894] BUG: Bad rss-counter state mm:0000000075bca679 type:MM_ANONPAGES val:22 [ 43.773069] BUG: Bad rss-counter state mm:00000000c4acf158 type:MM_FILEPAGES val:33 [ 43.774070] BUG: Bad rss-counter state mm:00000000c4acf158 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41781' (ECDSA) to the list of known hosts. 2023/06/19 19:22:59 fuzzer started 2023/06/19 19:22:59 dialing manager at localhost:44161 2023/06/19 19:22:59 checking machine... 2023/06/19 19:22:59 checking revisions... [ 44.405819] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:22:59 testing simple program... [ 44.459017] cgroup: Unknown subsys name 'net' [ 44.501311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:48 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff88800f1683f4 RBP=ffff88800f168000 RSP=ffff88800f7af938 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f859f0e4d77 R13=0000000000000000 R14=ffff88800f168000 R15=ffff88801365f080 RIP=ffffffff8135bd46 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 00007f859ebfd900 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=00007fffd121a000 CR3=000000000ecf6000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=0000000000000001 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=00007fd690d44000 CR3=000000000f72a000 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=2039353a32323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000