syzkaller login: [ 34.655554] BUG: Bad rss-counter state mm:00000000f61975af type:MM_FILEPAGES val:33 [ 34.657152] BUG: Bad rss-counter state mm:00000000f61975af type:MM_ANONPAGES val:22 [ 34.820414] ================================================================== [ 34.821363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.822319] Read of size 8 at addr ffff88800eda5310 by task sshd/220 [ 34.823183] [ 34.823415] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.824310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.825356] Call Trace: [ 34.825682] [ 34.825970] dump_stack_lvl+0x91/0xf0 [ 34.826469] print_report+0xcc/0x620 [ 34.826958] ? __virt_addr_valid+0x102/0x340 [ 34.827515] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.828139] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.828777] kasan_report+0xbe/0xf0 [ 34.829254] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.829891] vma_interval_tree_remove+0xc75/0xec0 [ 34.830495] vma_prepare+0xc54/0x11a0 [ 34.830989] __split_vma+0x5af/0x950 [ 34.831466] ? __pfx___split_vma+0x10/0x10 [ 34.831999] ? find_held_lock+0x2c/0x110 [ 34.832532] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.833104] ? lock_is_held_type+0x9f/0x120 [ 34.833659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.834266] ? mtree_range_walk+0x632/0x900 [ 34.834818] ? mas_walk+0x5c7/0x7c0 [ 34.835291] do_vmi_munmap+0x1f1/0x2b0 [ 34.835802] mmap_region+0x1f9/0x2660 [ 34.836292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.836829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.837543] ? __pfx_lock_acquire+0x10/0x10 [ 34.838079] ? __pfx_mmap_region+0x10/0x10 [ 34.838608] ? security_mmap_addr+0x7d/0xa0 [ 34.839143] ? get_unmapped_area+0x1f5/0x3f0 [ 34.839700] do_mmap+0x854/0xf00 [ 34.840142] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.840650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.841224] ksys_mmap_pgoff+0x3af/0x500 [ 34.841736] do_syscall_64+0x3f/0x90 [ 34.842218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.842869] RIP: 0033:0x7f4f5bc82d82 [ 34.843335] 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 [ 34.845475] RSP: 002b:00007ffd355d7f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.846388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f5bc82d82 [ 34.847239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f5b0bc000 [ 34.848089] RBP: 00007f4f5b0bc000 R08: 0000000000000009 R09: 0000000000001000 [ 34.848957] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558bf2be5ec0 [ 34.849808] R13: 00007ffd355d7fa0 R14: 00007ffd355d7fd0 R15: 00007ffd355d8330 [ 34.850666] [ 34.850961] [ 34.851184] Allocated by task 213: [ 34.851610] kasan_save_stack+0x22/0x50 [ 34.852114] kasan_set_track+0x25/0x30 [ 34.852615] __kasan_slab_alloc+0x59/0x70 [ 34.853145] kmem_cache_alloc+0x16b/0x370 [ 34.853666] vm_area_dup+0x20/0x160 [ 34.854120] __split_vma+0x170/0x950 [ 34.854588] split_vma+0xc6/0x110 [ 34.855028] mprotect_fixup+0x8d2/0xb30 [ 34.855533] do_mprotect_pkey+0x87e/0xd40 [ 34.856060] __x64_sys_mprotect+0x78/0xc0 [ 34.856599] do_syscall_64+0x3f/0x90 [ 34.857080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.857720] [ 34.857935] Freed by task 213: [ 34.858328] kasan_save_stack+0x22/0x50 [ 34.858835] kasan_set_track+0x25/0x30 [ 34.859333] kasan_save_free_info+0x2b/0x50 [ 34.859872] __kasan_slab_free+0x10a/0x190 [ 34.860412] kmem_cache_free+0x10d/0x4d0 [ 34.860935] rcu_core+0x8c8/0x2860 [ 34.861388] __do_softirq+0x1b7/0x7d4 [ 34.861866] [ 34.862081] Last potentially related work creation: [ 34.862672] kasan_save_stack+0x22/0x50 [ 34.863191] __kasan_record_aux_stack+0x8e/0xa0 [ 34.863766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.864426] remove_vma+0x139/0x170 [ 34.864890] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.865454] do_vmi_munmap+0x1f1/0x2b0 [ 34.865945] __vm_munmap+0x138/0x3a0 [ 34.866416] __x64_sys_munmap+0x59/0x80 [ 34.866914] do_syscall_64+0x3f/0x90 [ 34.867395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.868052] [ 34.868274] The buggy address belongs to the object at ffff88800eda52b8 [ 34.868274] which belongs to the cache vm_area_struct of size 168 [ 34.869767] The buggy address is located 88 bytes inside of [ 34.869767] freed 168-byte region [ffff88800eda52b8, ffff88800eda5360) [ 34.871177] [ 34.871391] The buggy address belongs to the physical page: [ 34.872051] page:00000000dcf053a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeda5 [ 34.873142] memcg:ffff8880095bbc01 [ 34.873572] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.874272] page_type: 0xffffffff() [ 34.874718] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.875643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095bbc01 [ 34.876576] page dumped because: kasan: bad access detected [ 34.877248] [ 34.877476] Memory state around the buggy address: [ 34.878071] ffff88800eda5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.878940] ffff88800eda5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.879800] >ffff88800eda5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.880652] ^ [ 34.881114] ffff88800eda5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.881967] ffff88800eda5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 34.882824] ================================================================== [ 34.884873] Disabling lock debugging due to kernel taint [ 36.746125] BUG: Bad rss-counter state mm:00000000083d67af type:MM_FILEPAGES val:33 [ 36.747119] BUG: Bad rss-counter state mm:00000000083d67af type:MM_ANONPAGES val:22 [ 37.238512] BUG: Bad rss-counter state mm:000000008508d2c8 type:MM_FILEPAGES val:33 [ 37.239734] BUG: Bad rss-counter state mm:000000008508d2c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24736' (ECDSA) to the list of known hosts. 2023/06/19 16:59:38 fuzzer started 2023/06/19 16:59:38 dialing manager at localhost:44161 2023/06/19 16:59:38 checking machine... 2023/06/19 16:59:38 checking revisions... [ 37.937422] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:59:38 testing simple program... [ 37.988045] cgroup: Unknown subsys name 'net' [ 38.032137] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:59:34 Registers: info registers vcpu 0 RAX=ffff8880159ebf80 RBX=ffff88800c4e0000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800fc07d30 RSP=ffff88800fc07cc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000dc0 R14=0000000000000000 R15=ffffffff8364699f RIP=ffffffff818260cf RFL=00000202 [-------] 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 00007f11fd9d4900 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=00007f11fdf89650 CR3=000000001ce3e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff1100d9e1329 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806cf09938 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e5d 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 00007f435a665700 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=00007f8fbd6c0910 CR3=000000000fcac000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038333a3935 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000