syzkaller login: [ 53.080834] BUG: Bad rss-counter state mm:00000000b5e67d95 type:MM_FILEPAGES val:33 [ 53.082412] BUG: Bad rss-counter state mm:00000000b5e67d95 type:MM_ANONPAGES val:22 [ 53.237521] ================================================================== [ 53.238560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.239697] Read of size 8 at addr ffff8880103066b0 by task sshd/220 [ 53.240894] [ 53.241165] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.242249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.243502] Call Trace: [ 53.243930] [ 53.244250] dump_stack_lvl+0x91/0xf0 [ 53.244840] print_report+0xcc/0x620 [ 53.245406] ? __virt_addr_valid+0x102/0x340 [ 53.246027] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.246736] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.247462] kasan_report+0xbe/0xf0 [ 53.247992] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.248693] vma_interval_tree_remove+0xc75/0xec0 [ 53.249376] vma_prepare+0xc54/0x11a0 [ 53.249937] __split_vma+0x5af/0x950 [ 53.250480] ? __pfx___split_vma+0x10/0x10 [ 53.251078] ? find_held_lock+0x2c/0x110 [ 53.251706] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.252323] ? lock_is_held_type+0x9f/0x120 [ 53.252932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.253631] ? mtree_range_walk+0x632/0x900 [ 53.254241] ? mas_walk+0x5c7/0x7c0 [ 53.254798] do_vmi_munmap+0x1f1/0x2b0 [ 53.255367] mmap_region+0x1f9/0x2660 [ 53.255925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.256516] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.257314] ? __pfx_lock_acquire+0x10/0x10 [ 53.257921] ? __pfx_mmap_region+0x10/0x10 [ 53.258529] ? security_mmap_addr+0x7d/0xa0 [ 53.259118] ? get_unmapped_area+0x1f5/0x3f0 [ 53.259778] do_mmap+0x854/0xf00 [ 53.260274] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.260838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.261484] ksys_mmap_pgoff+0x3af/0x500 [ 53.262065] do_syscall_64+0x3f/0x90 [ 53.262610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.263324] RIP: 0033:0x7fe70368bd82 [ 53.263856] 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 [ 53.266210] RSP: 002b:00007ffdb933f588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.267216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe70368bd82 [ 53.268158] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe702ac5000 [ 53.269071] RBP: 00007fe702ac5000 R08: 0000000000000009 R09: 0000000000001000 [ 53.270000] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e13ee4cf70 [ 53.270938] R13: 00007ffdb933f5a0 R14: 00007ffdb933f5d0 R15: 00007ffdb933f930 [ 53.271912] [ 53.272242] [ 53.272490] Allocated by task 213: [ 53.272964] kasan_save_stack+0x22/0x50 [ 53.273533] kasan_set_track+0x25/0x30 [ 53.274076] __kasan_slab_alloc+0x59/0x70 [ 53.274693] kmem_cache_alloc+0x16b/0x370 [ 53.275259] vm_area_dup+0x20/0x160 [ 53.275777] __split_vma+0x170/0x950 [ 53.276282] split_vma+0xc6/0x110 [ 53.276781] mprotect_fixup+0x8d2/0xb30 [ 53.277332] do_mprotect_pkey+0x87e/0xd40 [ 53.277918] __x64_sys_mprotect+0x78/0xc0 [ 53.278491] do_syscall_64+0x3f/0x90 [ 53.278992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.279719] [ 53.279950] Freed by task 213: [ 53.280380] kasan_save_stack+0x22/0x50 [ 53.280917] kasan_set_track+0x25/0x30 [ 53.281464] kasan_save_free_info+0x2b/0x50 [ 53.282035] __kasan_slab_free+0x10a/0x190 [ 53.282619] kmem_cache_free+0x10d/0x4d0 [ 53.283173] rcu_core+0x8c8/0x2860 [ 53.283681] __do_softirq+0x1b7/0x7d4 [ 53.284207] [ 53.284473] Last potentially related work creation: [ 53.285334] kasan_save_stack+0x22/0x50 [ 53.285953] __kasan_record_aux_stack+0x8e/0xa0 [ 53.286591] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.287303] remove_vma+0x139/0x170 [ 53.287825] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.288457] do_vmi_munmap+0x1f1/0x2b0 [ 53.288995] __vm_munmap+0x138/0x3a0 [ 53.289540] __x64_sys_munmap+0x59/0x80 [ 53.290086] do_syscall_64+0x3f/0x90 [ 53.290620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.291325] [ 53.291586] The buggy address belongs to the object at ffff888010306658 [ 53.291586] which belongs to the cache vm_area_struct of size 168 [ 53.293211] The buggy address is located 88 bytes inside of [ 53.293211] freed 168-byte region [ffff888010306658, ffff888010306700) [ 53.294808] [ 53.295043] The buggy address belongs to the physical page: [ 53.295810] page:000000003e00ade4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10306 [ 53.297028] memcg:ffff888017a23901 [ 53.297505] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.298211] page_type: 0xffffffff() [ 53.298726] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 53.299760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017a23901 [ 53.300765] page dumped because: kasan: bad access detected [ 53.301516] [ 53.301755] Memory state around the buggy address: [ 53.302406] ffff888010306580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.303352] ffff888010306600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 53.304314] >ffff888010306680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.305272] ^ [ 53.305930] ffff888010306700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 53.306880] ffff888010306780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 53.307842] ================================================================== [ 53.308867] Disabling lock debugging due to kernel taint [ 55.996419] BUG: Bad rss-counter state mm:0000000079bfd6b2 type:MM_FILEPAGES val:33 [ 55.998047] BUG: Bad rss-counter state mm:0000000079bfd6b2 type:MM_ANONPAGES val:22 [ 56.534783] BUG: Bad rss-counter state mm:00000000d069b8ee type:MM_FILEPAGES val:33 [ 56.535785] BUG: Bad rss-counter state mm:00000000d069b8ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45996' (ECDSA) to the list of known hosts. 2023/06/20 04:11:07 fuzzer started 2023/06/20 04:11:08 dialing manager at localhost:44161 2023/06/20 04:11:08 checking machine... 2023/06/20 04:11:08 checking revisions... [ 57.340839] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:11:08 testing simple program... [ 57.391845] cgroup: Unknown subsys name 'net' [ 57.434853] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:10:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f03eb60b610 CR3=000000001683a000 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=2037303a31313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a31313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000000000e8 RCX=0000000000000000 RDX=ffff88801672b680 RSI=00000000000000e8 RDI=ffff888010330ec0 RBP=ffff888010330fa8 RSP=ffff888019b4f868 R8 =0000000000000007 R9 =0000000000000010 R10=ffff888010330ec0 R11=0000000000000000 R12=ffff888010330ec0 R13=0000000000000001 R14=ffff888010330fa7 R15=ffff88800d843000 RIP=ffffffff8184cae2 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 00007f6acb5e2900 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=00007f6acbb99618 CR3=0000000018f76000 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