syzkaller login: [ 53.112488] BUG: Bad rss-counter state mm:000000003e8b8495 type:MM_FILEPAGES val:33 [ 53.113232] BUG: Bad rss-counter state mm:000000003e8b8495 type:MM_ANONPAGES val:22 [ 53.237996] ================================================================== [ 53.238686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.239406] Read of size 8 at addr ffff888009498ed8 by task sshd/220 [ 53.239993] [ 53.240159] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.240811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.241554] Call Trace: [ 53.241804] [ 53.242018] dump_stack_lvl+0x91/0xf0 [ 53.242519] print_report+0xcc/0x620 [ 53.242891] ? __virt_addr_valid+0x102/0x340 [ 53.243316] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.243782] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.244252] kasan_report+0xbe/0xf0 [ 53.244650] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.245120] vma_interval_tree_remove+0xc75/0xec0 [ 53.245594] vma_prepare+0xc54/0x11a0 [ 53.245974] __split_vma+0x5af/0x950 [ 53.246289] ? __pfx___split_vma+0x10/0x10 [ 53.246577] ? find_held_lock+0x2c/0x110 [ 53.246862] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.247175] ? lock_is_held_type+0x9f/0x120 [ 53.247475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.247802] ? mtree_range_walk+0x632/0x900 [ 53.248097] ? mas_walk+0x5c7/0x7c0 [ 53.248358] do_vmi_munmap+0x1f1/0x2b0 [ 53.248622] mmap_region+0x1f9/0x2660 [ 53.248880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.249155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.249546] ? __pfx_lock_acquire+0x10/0x10 [ 53.249841] ? __pfx_mmap_region+0x10/0x10 [ 53.250131] ? security_mmap_addr+0x7d/0xa0 [ 53.250434] ? get_unmapped_area+0x1f5/0x3f0 [ 53.250729] do_mmap+0x854/0xf00 [ 53.250967] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.251233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.251545] ksys_mmap_pgoff+0x3af/0x500 [ 53.251820] do_syscall_64+0x3f/0x90 [ 53.252082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.252438] RIP: 0033:0x7f9425307d82 [ 53.252681] 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 [ 53.253849] RSP: 002b:00007ffd6ecee978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.254351] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9425307d82 [ 53.254809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9424741000 [ 53.255276] RBP: 00007f9424741000 R08: 0000000000000009 R09: 0000000000001000 [ 53.255733] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee0a171f70 [ 53.256192] R13: 00007ffd6ecee990 R14: 00007ffd6ecee9c0 R15: 00007ffd6eceed20 [ 53.256686] [ 53.256853] [ 53.256973] Allocated by task 213: [ 53.257213] kasan_save_stack+0x22/0x50 [ 53.257506] kasan_set_track+0x25/0x30 [ 53.257796] __kasan_slab_alloc+0x59/0x70 [ 53.258091] kmem_cache_alloc+0x16b/0x370 [ 53.258396] vm_area_dup+0x20/0x160 [ 53.258654] __split_vma+0x170/0x950 [ 53.258913] split_vma+0xc6/0x110 [ 53.259159] mprotect_fixup+0x8d2/0xb30 [ 53.259445] do_mprotect_pkey+0x87e/0xd40 [ 53.259738] __x64_sys_mprotect+0x78/0xc0 [ 53.260027] do_syscall_64+0x3f/0x90 [ 53.260298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.260660] [ 53.260778] Freed by task 213: [ 53.260999] kasan_save_stack+0x22/0x50 [ 53.261288] kasan_set_track+0x25/0x30 [ 53.261571] kasan_save_free_info+0x2b/0x50 [ 53.261887] __kasan_slab_free+0x10a/0x190 [ 53.262184] kmem_cache_free+0x10d/0x4d0 [ 53.262490] rcu_core+0x8c8/0x2860 [ 53.262740] __do_softirq+0x1b7/0x7d4 [ 53.263014] [ 53.263136] Last potentially related work creation: [ 53.263474] kasan_save_stack+0x22/0x50 [ 53.263761] __kasan_record_aux_stack+0x8e/0xa0 [ 53.264085] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.264454] remove_vma+0x139/0x170 [ 53.264706] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.265014] do_vmi_munmap+0x1f1/0x2b0 [ 53.265296] __vm_munmap+0x138/0x3a0 [ 53.265555] __x64_sys_munmap+0x59/0x80 [ 53.265843] do_syscall_64+0x3f/0x90 [ 53.266113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.266482] [ 53.266605] The buggy address belongs to the object at ffff888009498e80 [ 53.266605] which belongs to the cache vm_area_struct of size 168 [ 53.267449] The buggy address is located 88 bytes inside of [ 53.267449] freed 168-byte region [ffff888009498e80, ffff888009498f28) [ 53.268239] [ 53.268368] The buggy address belongs to the physical page: [ 53.268742] page:00000000108ffdfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9498 [ 53.269384] memcg:ffff88800965b601 [ 53.269706] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.270164] page_type: 0xffffffff() [ 53.270485] raw: 0100000000000200 ffff88800879fc80 ffffea000039bc40 dead000000000002 [ 53.271124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800965b601 [ 53.271760] page dumped because: kasan: bad access detected [ 53.272147] [ 53.272282] Memory state around the buggy address: [ 53.272612] ffff888009498d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.273094] ffff888009498e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 53.273574] >ffff888009498e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.274038] ^ [ 53.274446] ffff888009498f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 53.274921] ffff888009498f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.275404] ================================================================== [ 53.275998] Disabling lock debugging due to kernel taint [ 55.196860] BUG: Bad rss-counter state mm:00000000f82f2a25 type:MM_FILEPAGES val:33 [ 55.198201] BUG: Bad rss-counter state mm:00000000f82f2a25 type:MM_ANONPAGES val:22 [ 55.694471] BUG: Bad rss-counter state mm:00000000cd1c7f59 type:MM_FILEPAGES val:33 [ 55.695628] BUG: Bad rss-counter state mm:00000000cd1c7f59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33090' (ECDSA) to the list of known hosts. 2023/06/19 16:29:18 fuzzer started 2023/06/19 16:29:19 dialing manager at localhost:44161 2023/06/19 16:29:19 checking machine... 2023/06/19 16:29:19 checking revisions... [ 56.510852] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:29:19 testing simple program... [ 56.565955] cgroup: Unknown subsys name 'net' [ 56.631540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:04 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=0000000000000001 RCX=ffffffff8180c584 RDX=0000000000000010 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff888008d7f8c0 R8 =ffffffff86137508 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000212 [----A--] 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 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=00007f87a2e030b0 CR3=000000000e7a0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801466d3a0 RCX=0000000000000000 RDX=ffff8880166e1b40 RSI=ffffffff81732bd8 RDI=0000000000000006 RBP=ffff888016fc7ad8 RSP=ffff888016fc78d0 R8 =0000000000000006 R9 =00000000000000c0 R10=00000000000000c0 R11=00000000000b6996 R12=ffff888016fc7928 R13=ffff88801466d488 R14=ffff88800a078000 R15=0000000000000001 RIP=ffffffff81732bd8 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 0000000000000000 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=00007f06f80acf90 CR3=000000000c5b0000 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=756e696c2d34365f3638782f62696c2f XMM01=7272655f6d6f6362696c2f756e672d78 XMM02=00322e6f732e7272655f6d6f6362696c XMM03=2f756e672d78756e696c2d34365f3638 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000