syzkaller login: [ 38.981221] BUG: Bad rss-counter state mm:0000000032468285 type:MM_FILEPAGES val:33 [ 38.982605] BUG: Bad rss-counter state mm:0000000032468285 type:MM_ANONPAGES val:22 [ 39.148348] ================================================================== [ 39.149255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.150180] Read of size 8 at addr ffff88800f303b38 by task sshd/220 [ 39.150984] [ 39.151204] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.152151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.153135] Call Trace: [ 39.153458] [ 39.153745] dump_stack_lvl+0x91/0xf0 [ 39.154251] print_report+0xcc/0x620 [ 39.154757] ? __virt_addr_valid+0x102/0x340 [ 39.155310] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.155926] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.156545] kasan_report+0xbe/0xf0 [ 39.157021] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.157640] vma_interval_tree_remove+0xc75/0xec0 [ 39.158248] vma_prepare+0xc54/0x11a0 [ 39.158735] __split_vma+0x5af/0x950 [ 39.159212] ? __pfx___split_vma+0x10/0x10 [ 39.159745] ? find_held_lock+0x2c/0x110 [ 39.160269] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.160835] ? lock_is_held_type+0x9f/0x120 [ 39.161375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.161987] ? mtree_range_walk+0x632/0x900 [ 39.162558] ? mas_walk+0x5c7/0x7c0 [ 39.163046] do_vmi_munmap+0x1f1/0x2b0 [ 39.163540] mmap_region+0x1f9/0x2660 [ 39.164030] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.164542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.165251] ? __pfx_lock_acquire+0x10/0x10 [ 39.165786] ? __pfx_mmap_region+0x10/0x10 [ 39.166322] ? security_mmap_addr+0x7d/0xa0 [ 39.166868] ? get_unmapped_area+0x1f5/0x3f0 [ 39.167426] do_mmap+0x854/0xf00 [ 39.167869] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.168370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.168949] ksys_mmap_pgoff+0x3af/0x500 [ 39.169458] do_syscall_64+0x3f/0x90 [ 39.169945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.170614] RIP: 0033:0x7fd98223cd82 [ 39.171078] 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 [ 39.173246] RSP: 002b:00007ffc07f85e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.174155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd98223cd82 [ 39.175046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd981676000 [ 39.175912] RBP: 00007fd981676000 R08: 0000000000000009 R09: 0000000000001000 [ 39.176770] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b6a881f70 [ 39.177627] R13: 00007ffc07f85e20 R14: 00007ffc07f85e50 R15: 00007ffc07f861b0 [ 39.178499] [ 39.178803] [ 39.179016] Allocated by task 213: [ 39.179446] kasan_save_stack+0x22/0x50 [ 39.179954] kasan_set_track+0x25/0x30 [ 39.180450] __kasan_slab_alloc+0x59/0x70 [ 39.180981] kmem_cache_alloc+0x16b/0x370 [ 39.181497] vm_area_dup+0x20/0x160 [ 39.181952] __split_vma+0x170/0x950 [ 39.182418] split_vma+0xc6/0x110 [ 39.182889] mprotect_fixup+0x8d2/0xb30 [ 39.183391] do_mprotect_pkey+0x87e/0xd40 [ 39.183915] __x64_sys_mprotect+0x78/0xc0 [ 39.184448] do_syscall_64+0x3f/0x90 [ 39.184932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.185584] [ 39.185802] Freed by task 211: [ 39.186203] kasan_save_stack+0x22/0x50 [ 39.186719] kasan_set_track+0x25/0x30 [ 39.187218] kasan_save_free_info+0x2b/0x50 [ 39.187758] __kasan_slab_free+0x10a/0x190 [ 39.188289] kmem_cache_free+0x10d/0x4d0 [ 39.188800] rcu_core+0x8c8/0x2860 [ 39.189245] __do_softirq+0x1b7/0x7d4 [ 39.189731] [ 39.189949] Last potentially related work creation: [ 39.190542] kasan_save_stack+0x22/0x50 [ 39.191046] __kasan_record_aux_stack+0x8e/0xa0 [ 39.191625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.192267] remove_vma+0x139/0x170 [ 39.192727] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.193291] do_vmi_munmap+0x1f1/0x2b0 [ 39.193784] __vm_munmap+0x138/0x3a0 [ 39.194251] __x64_sys_munmap+0x59/0x80 [ 39.194767] do_syscall_64+0x3f/0x90 [ 39.195242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.195888] [ 39.196103] The buggy address belongs to the object at ffff88800f303ae0 [ 39.196103] which belongs to the cache vm_area_struct of size 168 [ 39.197590] The buggy address is located 88 bytes inside of [ 39.197590] freed 168-byte region [ffff88800f303ae0, ffff88800f303b88) [ 39.199011] [ 39.199227] The buggy address belongs to the physical page: [ 39.199885] page:000000006b96f22e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf303 [ 39.200977] memcg:ffff88800f63f001 [ 39.201407] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.202054] page_type: 0xffffffff() [ 39.202557] raw: 0100000000000200 ffff8880087a0c80 ffffea000061d540 dead000000000002 [ 39.203471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f63f001 [ 39.204385] page dumped because: kasan: bad access detected [ 39.205051] [ 39.205267] Memory state around the buggy address: [ 39.205846] ffff88800f303a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.206726] ffff88800f303a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.207596] >ffff88800f303b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.208480] ^ [ 39.209098] ffff88800f303b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.209949] ffff88800f303c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.210850] ================================================================== [ 39.211927] Disabling lock debugging due to kernel taint [ 40.707247] BUG: Bad rss-counter state mm:00000000b315de10 type:MM_FILEPAGES val:33 [ 40.707772] BUG: Bad rss-counter state mm:00000000b315de10 type:MM_ANONPAGES val:22 [ 41.114970] BUG: Bad rss-counter state mm:00000000683e81c8 type:MM_FILEPAGES val:33 [ 41.116047] BUG: Bad rss-counter state mm:00000000683e81c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61076' (ECDSA) to the list of known hosts. 2023/06/20 19:01:44 fuzzer started 2023/06/20 19:01:45 dialing manager at localhost:36067 2023/06/20 19:01:45 checking machine... 2023/06/20 19:01:45 checking revisions... [ 41.834950] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:01:45 testing simple program... [ 41.892282] cgroup: Unknown subsys name 'net' [ 41.929610] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd4c84fcb8 CR3=0000000015e52000 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=2034343a31303a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000481f95ac RCX=ffff88806cbcad60 RDX=000000000000000d RSI=0000000000000002 RDI=00000000a37228be RBP=ffff8880101b0890 RSP=ffff8880167b7768 R8 =00000000472c0f07 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff8880167b77d0 R15=000000000000000d RIP=ffffffff822704d3 RFL=00000206 [-----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 00007f6bcdb36900 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=00007f6bce0ee0b0 CR3=000000000dc5e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000