syzkaller login: [ 49.029650] BUG: Bad rss-counter state mm:00000000580c5942 type:MM_FILEPAGES val:33 [ 49.031144] BUG: Bad rss-counter state mm:00000000580c5942 type:MM_ANONPAGES val:22 [ 49.222673] ================================================================== [ 49.223645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.224637] Read of size 8 at addr ffff88800fd1bb38 by task sshd/219 [ 49.225622] [ 49.225884] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.226797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.227849] Call Trace: [ 49.228203] [ 49.228513] dump_stack_lvl+0x91/0xf0 [ 49.229029] print_report+0xcc/0x620 [ 49.229583] ? __virt_addr_valid+0x102/0x340 [ 49.230187] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.230841] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.231495] kasan_report+0xbe/0xf0 [ 49.232000] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.232658] vma_interval_tree_remove+0xc75/0xec0 [ 49.233306] vma_prepare+0xc54/0x11a0 [ 49.233826] __split_vma+0x5af/0x950 [ 49.234380] ? __pfx___split_vma+0x10/0x10 [ 49.234940] ? find_held_lock+0x2c/0x110 [ 49.235504] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.236116] ? lock_is_held_type+0x9f/0x120 [ 49.236708] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.237379] ? mtree_range_walk+0x632/0x900 [ 49.237994] ? mas_walk+0x5c7/0x7c0 [ 49.238621] do_vmi_munmap+0x1f1/0x2b0 [ 49.239296] mmap_region+0x1f9/0x2660 [ 49.239847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.240415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.241210] ? __pfx_lock_acquire+0x10/0x10 [ 49.241823] ? __pfx_mmap_region+0x10/0x10 [ 49.242421] ? security_mmap_addr+0x7d/0xa0 [ 49.242997] ? get_unmapped_area+0x1f5/0x3f0 [ 49.243595] do_mmap+0x854/0xf00 [ 49.244055] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.244592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.245224] ksys_mmap_pgoff+0x3af/0x500 [ 49.245780] do_syscall_64+0x3f/0x90 [ 49.246297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.246980] RIP: 0033:0x7f26c5575d82 [ 49.247481] 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 [ 49.249787] RSP: 002b:00007fff6540edc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.250755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26c5575d82 [ 49.251672] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26c49af000 [ 49.252575] RBP: 00007f26c49af000 R08: 0000000000000009 R09: 0000000000001000 [ 49.253494] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce51431b20 [ 49.254402] R13: 00007fff6540ede0 R14: 00007fff6540ee10 R15: 00007fff6540f170 [ 49.255333] [ 49.255637] [ 49.255860] Allocated by task 212: [ 49.256331] kasan_save_stack+0x22/0x50 [ 49.256894] kasan_set_track+0x25/0x30 [ 49.257456] __kasan_slab_alloc+0x59/0x70 [ 49.258043] kmem_cache_alloc+0x16b/0x370 [ 49.258616] vm_area_dup+0x20/0x160 [ 49.259090] __split_vma+0x170/0x950 [ 49.259585] split_vma+0xc6/0x110 [ 49.260037] mprotect_fixup+0x8d2/0xb30 [ 49.260586] do_mprotect_pkey+0x87e/0xd40 [ 49.261153] __x64_sys_mprotect+0x78/0xc0 [ 49.261751] do_syscall_64+0x3f/0x90 [ 49.262267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.262926] [ 49.263157] Freed by task 212: [ 49.263574] kasan_save_stack+0x22/0x50 [ 49.264094] kasan_set_track+0x25/0x30 [ 49.264624] kasan_save_free_info+0x2b/0x50 [ 49.265193] __kasan_slab_free+0x10a/0x190 [ 49.265775] kmem_cache_free+0x10d/0x4d0 [ 49.266405] rcu_core+0x8c8/0x2860 [ 49.266862] __do_softirq+0x1b7/0x7d4 [ 49.267372] [ 49.267606] Last potentially related work creation: [ 49.268227] kasan_save_stack+0x22/0x50 [ 49.268751] __kasan_record_aux_stack+0x8e/0xa0 [ 49.269375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.270061] remove_vma+0x139/0x170 [ 49.270545] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.271121] do_vmi_munmap+0x1f1/0x2b0 [ 49.271651] __vm_munmap+0x138/0x3a0 [ 49.272145] __x64_sys_munmap+0x59/0x80 [ 49.272670] do_syscall_64+0x3f/0x90 [ 49.273180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.273940] [ 49.274176] Second to last potentially related work creation: [ 49.274904] kasan_save_stack+0x22/0x50 [ 49.275450] __kasan_record_aux_stack+0x8e/0xa0 [ 49.276046] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.276741] remove_vma+0x139/0x170 [ 49.277230] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.277824] do_vmi_munmap+0x1f1/0x2b0 [ 49.278343] mmap_region+0x1f9/0x2660 [ 49.278841] do_mmap+0x854/0xf00 [ 49.279320] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.279819] ksys_mmap_pgoff+0x3af/0x500 [ 49.280364] do_syscall_64+0x3f/0x90 [ 49.280862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.281548] [ 49.281798] The buggy address belongs to the object at ffff88800fd1bae0 [ 49.281798] which belongs to the cache vm_area_struct of size 168 [ 49.283332] The buggy address is located 88 bytes inside of [ 49.283332] freed 168-byte region [ffff88800fd1bae0, ffff88800fd1bb88) [ 49.284842] [ 49.285071] The buggy address belongs to the physical page: [ 49.285786] page:000000004ae80463 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1b [ 49.286925] memcg:ffff888016765c01 [ 49.287384] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 49.288109] page_type: 0xffffffff() [ 49.288590] raw: 0100000000000200 ffff88800879fc80 ffffea00005b83c0 dead000000000007 [ 49.289559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016765c01 [ 49.290515] page dumped because: kasan: bad access detected [ 49.291211] [ 49.291436] Memory state around the buggy address: [ 49.292066] ffff88800fd1ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.292984] ffff88800fd1ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 49.293925] >ffff88800fd1bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.294823] ^ [ 49.295479] ffff88800fd1bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 49.296358] ffff88800fd1bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 49.297274] ================================================================== [ 49.298290] Disabling lock debugging due to kernel taint [ 51.509096] BUG: Bad rss-counter state mm:0000000044a4219e type:MM_FILEPAGES val:33 [ 51.509998] BUG: Bad rss-counter state mm:0000000044a4219e type:MM_ANONPAGES val:22 [ 52.020961] BUG: Bad rss-counter state mm:00000000c3b647cf type:MM_FILEPAGES val:33 [ 52.022052] BUG: Bad rss-counter state mm:00000000c3b647cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15247' (ECDSA) to the list of known hosts. 2023/06/19 15:07:14 fuzzer started 2023/06/19 15:07:14 dialing manager at localhost:44161 2023/06/19 15:07:14 checking machine... 2023/06/19 15:07:14 checking revisions... [ 52.737684] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:07:14 testing simple program... [ 52.786199] cgroup: Unknown subsys name 'net' [ 52.841876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:06:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000059 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000031 RDI=00007f6468004a6b RBP=0000000000000013 RSP=00007f64756f5660 R8 =00000000ffffff00 R9 =00007f64756f57e0 R10=00007f64756f5788 R11=00007f64756f576c R12=00007f6468004a69 R13=0000000000000020 R14=0000000000000012 R15=00007f64756f5701 RIP=000055a8a42a25e1 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f64756f9700 00000000 00000000 GS =0000 0000000000000000 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=00007f9a36010660 CR3=000000000df6a000 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=37303a3531203931206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36343937352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb22c6 RBX=ffffffff85d91630 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffffffff85d91630 RSP=ffff888016e8f5c8 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d91630 R13=ffffffff85d91630 R14=ffffffff85d91630 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f9e28dc0900 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=00007ffe0381b000 CR3=0000000016cea000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000