syzkaller login: [ 34.916818] BUG: Bad rss-counter state mm:000000005fee02c6 type:MM_FILEPAGES val:33 [ 34.917853] BUG: Bad rss-counter state mm:000000005fee02c6 type:MM_ANONPAGES val:22 [ 35.081674] ================================================================== [ 35.082616] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.083564] Read of size 8 at addr ffff888018f0c3f8 by task sshd/220 [ 35.084465] [ 35.084689] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.085593] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.086605] Call Trace: [ 35.086928] [ 35.087221] dump_stack_lvl+0x91/0xf0 [ 35.087720] print_report+0xcc/0x620 [ 35.088241] ? __virt_addr_valid+0x102/0x340 [ 35.088811] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.089441] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.090075] kasan_report+0xbe/0xf0 [ 35.090559] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.091209] vma_interval_tree_remove+0xc75/0xec0 [ 35.091822] vma_prepare+0xc54/0x11a0 [ 35.092329] __split_vma+0x5af/0x950 [ 35.092818] ? __pfx___split_vma+0x10/0x10 [ 35.093355] ? find_held_lock+0x2c/0x110 [ 35.093888] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.094469] ? lock_is_held_type+0x9f/0x120 [ 35.095016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.095630] ? mtree_range_walk+0x632/0x900 [ 35.096204] ? mas_walk+0x5c7/0x7c0 [ 35.096686] do_vmi_munmap+0x1f1/0x2b0 [ 35.097187] mmap_region+0x1f9/0x2660 [ 35.097684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.098201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.098929] ? __pfx_lock_acquire+0x10/0x10 [ 35.099473] ? __pfx_mmap_region+0x10/0x10 [ 35.100019] ? security_mmap_addr+0x7d/0xa0 [ 35.100566] ? get_unmapped_area+0x1f5/0x3f0 [ 35.101115] do_mmap+0x854/0xf00 [ 35.101561] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.102062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.102632] ksys_mmap_pgoff+0x3af/0x500 [ 35.103146] do_syscall_64+0x3f/0x90 [ 35.103641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.104307] RIP: 0033:0x7f1dfd915d82 [ 35.104775] 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 [ 35.106926] RSP: 002b:00007ffe4e884d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.107841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1dfd915d82 [ 35.108705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1dfcd4f000 [ 35.109554] RBP: 00007f1dfcd4f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.110394] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd42d18f70 [ 35.111241] R13: 00007ffe4e884d80 R14: 00007ffe4e884db0 R15: 00007ffe4e885110 [ 35.112103] [ 35.112395] [ 35.112617] Allocated by task 212: [ 35.113049] kasan_save_stack+0x22/0x50 [ 35.113559] kasan_set_track+0x25/0x30 [ 35.114055] __kasan_slab_alloc+0x59/0x70 [ 35.114589] kmem_cache_alloc+0x16b/0x370 [ 35.115101] vm_area_dup+0x20/0x160 [ 35.115561] __split_vma+0x170/0x950 [ 35.116061] split_vma+0xc6/0x110 [ 35.116509] mprotect_fixup+0x8d2/0xb30 [ 35.117026] do_mprotect_pkey+0x87e/0xd40 [ 35.117580] __x64_sys_mprotect+0x78/0xc0 [ 35.118120] do_syscall_64+0x3f/0x90 [ 35.118610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.119258] [ 35.119479] Freed by task 212: [ 35.119875] kasan_save_stack+0x22/0x50 [ 35.120398] kasan_set_track+0x25/0x30 [ 35.120902] kasan_save_free_info+0x2b/0x50 [ 35.121435] __kasan_slab_free+0x10a/0x190 [ 35.121977] kmem_cache_free+0x10d/0x4d0 [ 35.122485] rcu_core+0x8c8/0x2860 [ 35.122930] __do_softirq+0x1b7/0x7d4 [ 35.123433] [ 35.123652] Last potentially related work creation: [ 35.124269] kasan_save_stack+0x22/0x50 [ 35.124786] __kasan_record_aux_stack+0x8e/0xa0 [ 35.125360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.126022] remove_vma+0x139/0x170 [ 35.126482] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.127052] do_vmi_munmap+0x1f1/0x2b0 [ 35.127544] __vm_munmap+0x138/0x3a0 [ 35.128031] __x64_sys_munmap+0x59/0x80 [ 35.128529] do_syscall_64+0x3f/0x90 [ 35.129007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.129657] [ 35.129875] Second to last potentially related work creation: [ 35.130579] kasan_save_stack+0x22/0x50 [ 35.131088] __kasan_record_aux_stack+0x8e/0xa0 [ 35.131674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.132337] remove_vma+0x139/0x170 [ 35.132799] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.133370] do_vmi_munmap+0x1f1/0x2b0 [ 35.133877] mmap_region+0x1f9/0x2660 [ 35.134372] do_mmap+0x854/0xf00 [ 35.134817] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.135323] ksys_mmap_pgoff+0x3af/0x500 [ 35.135829] do_syscall_64+0x3f/0x90 [ 35.136323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.136985] [ 35.137200] The buggy address belongs to the object at ffff888018f0c3a0 [ 35.137200] which belongs to the cache vm_area_struct of size 168 [ 35.138718] The buggy address is located 88 bytes inside of [ 35.138718] freed 168-byte region [ffff888018f0c3a0, ffff888018f0c448) [ 35.140163] [ 35.140380] The buggy address belongs to the physical page: [ 35.141092] page:00000000f62cb587 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f0c [ 35.142259] memcg:ffff88800dd1c701 [ 35.142715] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.143452] page_type: 0xffffffff() [ 35.143935] raw: 0100000000000200 ffff88800879fc80 ffffea000036ae40 dead000000000003 [ 35.144926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd1c701 [ 35.145888] page dumped because: kasan: bad access detected [ 35.146597] [ 35.146827] Memory state around the buggy address: [ 35.147446] ffff888018f0c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.148368] ffff888018f0c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.149282] >ffff888018f0c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.150190] ^ [ 35.151090] ffff888018f0c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.152004] ffff888018f0c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.152909] ================================================================== [ 35.154059] Disabling lock debugging due to kernel taint [ 37.478780] BUG: Bad rss-counter state mm:00000000133f1e36 type:MM_FILEPAGES val:33 [ 37.480012] BUG: Bad rss-counter state mm:00000000133f1e36 type:MM_ANONPAGES val:22 [ 37.896280] BUG: Bad rss-counter state mm:00000000098052ee type:MM_FILEPAGES val:33 [ 37.898132] BUG: Bad rss-counter state mm:00000000098052ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30833' (ECDSA) to the list of known hosts. 2023/06/19 12:05:17 fuzzer started 2023/06/19 12:05:17 dialing manager at localhost:44161 2023/06/19 12:05:17 checking machine... 2023/06/19 12:05:17 checking revisions... [ 38.615841] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:05:17 testing simple program... [ 38.654990] cgroup: Unknown subsys name 'net' [ 38.694337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:11 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=00007f8e77e0b540 CR3=000000001661c000 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=2036313a35303a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35303a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015c2b680 RSI=ffffffff8186bc88 RDI=0000000000000005 RBP=ffff88800db92c80 RSP=ffff888014697ec0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888015c2b680 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8186bc88 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 00007f30e03f5900 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=00007f30e09ac618 CR3=000000000eb84000 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=563412feff00545000000000000080fe 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