syzkaller login: [ 35.615229] BUG: Bad rss-counter state mm:00000000d8449af2 type:MM_FILEPAGES val:33 [ 35.616543] BUG: Bad rss-counter state mm:00000000d8449af2 type:MM_ANONPAGES val:22 [ 35.798066] ================================================================== [ 35.798988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.799932] Read of size 8 at addr ffff88800eb09310 by task sshd/220 [ 35.800713] [ 35.801029] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.801924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.802914] Call Trace: [ 35.803253] [ 35.803533] dump_stack_lvl+0x91/0xf0 [ 35.804029] print_report+0xcc/0x620 [ 35.804509] ? __virt_addr_valid+0x102/0x340 [ 35.805120] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.805762] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.806394] kasan_report+0xbe/0xf0 [ 35.806870] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.807495] vma_interval_tree_remove+0xc75/0xec0 [ 35.808096] vma_prepare+0xc54/0x11a0 [ 35.808594] __split_vma+0x5af/0x950 [ 35.809069] ? __pfx___split_vma+0x10/0x10 [ 35.809622] ? find_held_lock+0x2c/0x110 [ 35.810169] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.810750] ? lock_is_held_type+0x9f/0x120 [ 35.811292] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.811903] ? mtree_range_walk+0x632/0x900 [ 35.812458] ? mas_walk+0x5c7/0x7c0 [ 35.812943] do_vmi_munmap+0x1f1/0x2b0 [ 35.813453] mmap_region+0x1f9/0x2660 [ 35.813937] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.814447] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.815161] ? __pfx_lock_acquire+0x10/0x10 [ 35.815696] ? __pfx_mmap_region+0x10/0x10 [ 35.816232] ? security_mmap_addr+0x7d/0xa0 [ 35.816790] ? get_unmapped_area+0x1f5/0x3f0 [ 35.817363] do_mmap+0x854/0xf00 [ 35.817836] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.818353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.818937] ksys_mmap_pgoff+0x3af/0x500 [ 35.819471] do_syscall_64+0x3f/0x90 [ 35.819969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.820638] RIP: 0033:0x7f7cb46cbd82 [ 35.821101] 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 [ 35.823233] RSP: 002b:00007fffab605488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.824139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cb46cbd82 [ 35.824998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cb3b05000 [ 35.825876] RBP: 00007f7cb3b05000 R08: 0000000000000009 R09: 0000000000001000 [ 35.826745] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d841f19d90 [ 35.827609] R13: 00007fffab6054a0 R14: 00007fffab6054d0 R15: 00007fffab605830 [ 35.828512] [ 35.828809] [ 35.829029] Allocated by task 213: [ 35.829458] kasan_save_stack+0x22/0x50 [ 35.829977] kasan_set_track+0x25/0x30 [ 35.830484] __kasan_slab_alloc+0x59/0x70 [ 35.831019] kmem_cache_alloc+0x16b/0x370 [ 35.831548] vm_area_dup+0x20/0x160 [ 35.832001] __split_vma+0x170/0x950 [ 35.832474] split_vma+0xc6/0x110 [ 35.832925] mprotect_fixup+0x8d2/0xb30 [ 35.833438] do_mprotect_pkey+0x87e/0xd40 [ 35.833972] __x64_sys_mprotect+0x78/0xc0 [ 35.834526] do_syscall_64+0x3f/0x90 [ 35.835003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.835645] [ 35.835850] Freed by task 213: [ 35.836228] kasan_save_stack+0x22/0x50 [ 35.836725] kasan_set_track+0x25/0x30 [ 35.837192] kasan_save_free_info+0x2b/0x50 [ 35.837691] __kasan_slab_free+0x10a/0x190 [ 35.838193] kmem_cache_free+0x10d/0x4d0 [ 35.838673] rcu_core+0x8c8/0x2860 [ 35.839097] __do_softirq+0x1b7/0x7d4 [ 35.839554] [ 35.839759] Last potentially related work creation: [ 35.840311] kasan_save_stack+0x22/0x50 [ 35.840802] __kasan_record_aux_stack+0x8e/0xa0 [ 35.841350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.842010] remove_vma+0x139/0x170 [ 35.842483] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.843051] do_vmi_munmap+0x1f1/0x2b0 [ 35.843549] __vm_munmap+0x138/0x3a0 [ 35.844027] __x64_sys_munmap+0x59/0x80 [ 35.844540] do_syscall_64+0x3f/0x90 [ 35.845064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.845723] [ 35.845943] The buggy address belongs to the object at ffff88800eb092b8 [ 35.845943] which belongs to the cache vm_area_struct of size 168 [ 35.847434] The buggy address is located 88 bytes inside of [ 35.847434] freed 168-byte region [ffff88800eb092b8, ffff88800eb09360) [ 35.848883] [ 35.849100] The buggy address belongs to the physical page: [ 35.849773] page:00000000dde0a8d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb09 [ 35.850875] memcg:ffff8880196f5a01 [ 35.851300] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.851948] page_type: 0xffffffff() [ 35.852399] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.853334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196f5a01 [ 35.854247] page dumped because: kasan: bad access detected [ 35.854910] [ 35.855128] Memory state around the buggy address: [ 35.855709] ffff88800eb09200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 35.856575] ffff88800eb09280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.857485] >ffff88800eb09300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.858380] ^ [ 35.858849] ffff88800eb09380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.859715] ffff88800eb09400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.860573] ================================================================== [ 35.861623] Disabling lock debugging due to kernel taint [ 37.865087] BUG: Bad rss-counter state mm:0000000081d1584e type:MM_FILEPAGES val:33 [ 37.866287] BUG: Bad rss-counter state mm:0000000081d1584e type:MM_ANONPAGES val:22 [ 38.385028] BUG: Bad rss-counter state mm:00000000e1205c72 type:MM_FILEPAGES val:33 [ 38.386219] BUG: Bad rss-counter state mm:00000000e1205c72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65244' (ECDSA) to the list of known hosts. 2023/06/19 18:32:06 fuzzer started 2023/06/19 18:32:06 dialing manager at localhost:44161 2023/06/19 18:32:06 checking machine... 2023/06/19 18:32:06 checking revisions... [ 39.165670] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:32:07 testing simple program... [ 39.210252] cgroup: Unknown subsys name 'net' [ 39.262856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:32:01 Registers: info registers vcpu 0 RAX=ffffed1001e3a200 RBX=ffffed1001e3a201 RCX=ffffffff8451db1d RDX=0000000000000001 RSI=0000000000000008 RDI=ffff88800f1d1000 RBP=ffffed1001e3a200 RSP=ffff888010397b18 R8 =0000000000000000 R9 =ffffed1001e3a200 R10=ffff88800f1d1007 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000001 R14=ffff88800f1d1000 R15=00000000ffffffea RIP=ffffffff8180ef28 RFL=00000283 [--S---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 00007fdf48d23900 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=00007fdf48132620 CR3=0000000008dbe000 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=00000000000000000000000000000000 XMM01=aca994c7030615abcf4cabf43b72f87a XMM02=000000000011ee00ec2efd57dc4c00df XMM03=0000000000125ba8ad0d27dcbb2b44c0 XMM04=3b1f25ca0b399d5000000000000ae988 XMM05=f324558f8596dafc00000000001364e0 XMM06=4fda316b135da52b0000000000135580 XMM07=e042d86d42eb936e0000000000125e28 XMM08=ad0d27dcbb2b44c0000000000011ee60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff86137501 RDX=1ffff1100d9e136e RSI=ffffffff8180c585 RDI=ffff88806cf09b70 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800f4ad1c0 R15=ffff88800c9647e8 RIP=ffffffff813ad446 RFL=00000296 [--S-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 00007f22777d6900 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=00007ffc7395a000 CR3=000000000ea40000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000