syzkaller login: [ 51.222248] BUG: Bad rss-counter state mm:0000000012ca5720 type:MM_FILEPAGES val:33 [ 51.223532] BUG: Bad rss-counter state mm:0000000012ca5720 type:MM_ANONPAGES val:22 [ 51.417635] ================================================================== [ 51.418537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.419546] Read of size 8 at addr ffff888016fd4798 by task sshd/222 [ 51.420315] [ 51.420529] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.421530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.422471] Call Trace: [ 51.422777] [ 51.423051] dump_stack_lvl+0x91/0xf0 [ 51.423526] print_report+0xcc/0x620 [ 51.423997] ? __virt_addr_valid+0x102/0x340 [ 51.424537] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.425149] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.425749] kasan_report+0xbe/0xf0 [ 51.426204] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.426809] vma_interval_tree_remove+0xc75/0xec0 [ 51.427393] vma_prepare+0xc54/0x11a0 [ 51.427851] __split_vma+0x5af/0x950 [ 51.428305] ? __pfx___split_vma+0x10/0x10 [ 51.428815] ? find_held_lock+0x2c/0x110 [ 51.429331] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.429883] ? lock_is_held_type+0x9f/0x120 [ 51.430399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.430983] ? mtree_range_walk+0x632/0x900 [ 51.431510] ? mas_walk+0x5c7/0x7c0 [ 51.431968] do_vmi_munmap+0x1f1/0x2b0 [ 51.432441] mmap_region+0x1f9/0x2660 [ 51.432927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.433422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.434112] ? __pfx_lock_acquire+0x10/0x10 [ 51.434626] ? __pfx_mmap_region+0x10/0x10 [ 51.435137] ? security_mmap_addr+0x7d/0xa0 [ 51.435650] ? get_unmapped_area+0x1f5/0x3f0 [ 51.436183] do_mmap+0x854/0xf00 [ 51.436605] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.437095] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.437639] ksys_mmap_pgoff+0x3af/0x500 [ 51.438129] do_syscall_64+0x3f/0x90 [ 51.438587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.439206] RIP: 0033:0x7f2652eccd82 [ 51.439643] 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 [ 51.441687] RSP: 002b:00007fff1a33ec98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.442557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2652eccd82 [ 51.443368] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2652306000 [ 51.444185] RBP: 00007f2652306000 R08: 0000000000000009 R09: 0000000000001000 [ 51.445009] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c91ca9ec0 [ 51.445821] R13: 00007fff1a33ecb0 R14: 00007fff1a33ece0 R15: 00007fff1a33f040 [ 51.446643] [ 51.446923] [ 51.447130] Allocated by task 215: [ 51.447542] kasan_save_stack+0x22/0x50 [ 51.448033] kasan_set_track+0x25/0x30 [ 51.448510] __kasan_slab_alloc+0x59/0x70 [ 51.449027] kmem_cache_alloc+0x16b/0x370 [ 51.449525] vm_area_dup+0x20/0x160 [ 51.449963] __split_vma+0x170/0x950 [ 51.450412] split_vma+0xc6/0x110 [ 51.450834] mprotect_fixup+0x8d2/0xb30 [ 51.451319] do_mprotect_pkey+0x87e/0xd40 [ 51.451819] __x64_sys_mprotect+0x78/0xc0 [ 51.452321] do_syscall_64+0x3f/0x90 [ 51.452777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.453410] [ 51.453620] Freed by task 215: [ 51.454003] kasan_save_stack+0x22/0x50 [ 51.454487] kasan_set_track+0x25/0x30 [ 51.454961] kasan_save_free_info+0x2b/0x50 [ 51.455474] __kasan_slab_free+0x10a/0x190 [ 51.455988] kmem_cache_free+0x10d/0x4d0 [ 51.456479] rcu_core+0x8c8/0x2860 [ 51.456924] __do_softirq+0x1b7/0x7d4 [ 51.457382] [ 51.457590] Last potentially related work creation: [ 51.458154] kasan_save_stack+0x22/0x50 [ 51.458639] __kasan_record_aux_stack+0x8e/0xa0 [ 51.459187] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.459801] remove_vma+0x139/0x170 [ 51.460237] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.460771] do_vmi_munmap+0x1f1/0x2b0 [ 51.461247] __vm_munmap+0x138/0x3a0 [ 51.461697] __x64_sys_munmap+0x59/0x80 [ 51.462173] do_syscall_64+0x3f/0x90 [ 51.462627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.463241] [ 51.463451] Second to last potentially related work creation: [ 51.464109] kasan_save_stack+0x22/0x50 [ 51.464593] __kasan_record_aux_stack+0x8e/0xa0 [ 51.465157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.465778] remove_vma+0x139/0x170 [ 51.466212] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.466748] do_vmi_munmap+0x1f1/0x2b0 [ 51.467215] mmap_region+0x1f9/0x2660 [ 51.467676] do_mmap+0x854/0xf00 [ 51.468093] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.468561] ksys_mmap_pgoff+0x3af/0x500 [ 51.469058] do_syscall_64+0x3f/0x90 [ 51.469514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.470130] [ 51.470338] The buggy address belongs to the object at ffff888016fd4740 [ 51.470338] which belongs to the cache vm_area_struct of size 168 [ 51.471750] The buggy address is located 88 bytes inside of [ 51.471750] freed 168-byte region [ffff888016fd4740, ffff888016fd47e8) [ 51.473101] [ 51.473310] The buggy address belongs to the physical page: [ 51.473941] page:00000000575fae29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16fd4 [ 51.474996] memcg:ffff88800fbd7e01 [ 51.475409] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.476028] page_type: 0xffffffff() [ 51.476464] raw: 0100000000000200 ffff88800879fc80 ffffea0000609880 dead00000000000a [ 51.477362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbd7e01 [ 51.478231] page dumped because: kasan: bad access detected [ 51.478864] [ 51.479071] Memory state around the buggy address: [ 51.479629] ffff888016fd4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.480449] ffff888016fd4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 51.481285] >ffff888016fd4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 51.482107] ^ [ 51.482593] ffff888016fd4800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 51.483416] ffff888016fd4880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 51.484237] ================================================================== [ 51.485286] Disabling lock debugging due to kernel taint [ 54.298640] BUG: Bad rss-counter state mm:00000000dca4a02e type:MM_FILEPAGES val:33 [ 54.299627] BUG: Bad rss-counter state mm:00000000dca4a02e type:MM_ANONPAGES val:22 [ 54.778018] BUG: Bad rss-counter state mm:00000000da342b1f type:MM_FILEPAGES val:33 [ 54.778952] BUG: Bad rss-counter state mm:00000000da342b1f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20086' (ECDSA) to the list of known hosts. 2023/06/19 23:09:49 fuzzer started 2023/06/19 23:09:50 dialing manager at localhost:44161 2023/06/19 23:09:50 checking machine... 2023/06/19 23:09:50 checking revisions... [ 55.502876] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:09:50 testing simple program... [ 55.551939] cgroup: Unknown subsys name 'net' [ 55.615550] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:09:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001fbbe63 RSI=ffffffff8180ae06 RDI=ffff88800fddf388 RBP=ffff88800fddf358 RSP=ffff88800fddf2b8 R8 =0000000000000001 R9 =ffff88800fddf300 R10=0000000000038001 R11=0000000000020dd4 R12=ffff88800fddf388 R13=0000000000000000 R14=ffff88800efb1b40 R15=00000000802a000b RIP=ffffffff813ad42e RFL=00000286 [--S--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 00007f623ee9d900 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=000055d902032768 CR3=0000000016f2e000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818470dc RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880166ef6a0 RSI=ffffffff818470dc RDI=ffff8880166ef658 RBP=ffff8880166ef6b0 RSP=ffff8880166ef5e8 R8 =0000000000000001 R9 =ffff8880166ef698 R10=0000000000038001 R11=0000000000020c48 R12=ffff8880166ef720 R13=ffff8880166ef6a0 R14=ffff88800ec08000 R15=ffff8880166ef658 RIP=ffffffff81130641 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 00007f0a3ff98900 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=00007f0a4020c000 CR3=000000000dc50000 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=00000000ff0000000000000000000000 XMM01=ffffffff00ffffffffffffffffffffff XMM02=42494c4700342e332e325f4342494c47 XMM03=000000000000004700352e322e325f43 XMM04=4342494c4700362e322e325f4342494c XMM05=00007f0a40551f6000007f0a4070b950 XMM06=00007f0a4070b44000007f0a4070af20 XMM07=00007f0a4005512000007f0a40054b10 XMM08=00007f0a400545f000007f0a40054060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000