syzkaller login: [ 31.105243] BUG: Bad rss-counter state mm:000000000ab9858b type:MM_FILEPAGES val:33 [ 31.106296] BUG: Bad rss-counter state mm:000000000ab9858b type:MM_ANONPAGES val:22 [ 31.271405] ================================================================== [ 31.272499] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.273380] Read of size 8 at addr ffff88800f8a3b38 by task sshd/221 [ 31.274108] [ 31.274316] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.275200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.276107] Call Trace: [ 31.276408] [ 31.276700] dump_stack_lvl+0x91/0xf0 [ 31.277171] print_report+0xcc/0x620 [ 31.277629] ? __virt_addr_valid+0x102/0x340 [ 31.278156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278741] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279317] kasan_report+0xbe/0xf0 [ 31.279767] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280354] vma_interval_tree_remove+0xc75/0xec0 [ 31.280921] vma_prepare+0xc54/0x11a0 [ 31.281374] __split_vma+0x5af/0x950 [ 31.281822] ? __pfx___split_vma+0x10/0x10 [ 31.282328] ? find_held_lock+0x2c/0x110 [ 31.282842] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.283413] ? lock_is_held_type+0x9f/0x120 [ 31.283953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.284564] ? mtree_range_walk+0x632/0x900 [ 31.285118] ? mas_walk+0x5c7/0x7c0 [ 31.285602] do_vmi_munmap+0x1f1/0x2b0 [ 31.286111] mmap_region+0x1f9/0x2660 [ 31.286593] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287101] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.287834] ? __pfx_lock_acquire+0x10/0x10 [ 31.288376] ? __pfx_mmap_region+0x10/0x10 [ 31.288909] ? security_mmap_addr+0x7d/0xa0 [ 31.289448] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290014] do_mmap+0x854/0xf00 [ 31.290448] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.290942] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.291508] ksys_mmap_pgoff+0x3af/0x500 [ 31.292017] do_syscall_64+0x3f/0x90 [ 31.292497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293149] RIP: 0033:0x7fa4def19d82 [ 31.293603] 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 [ 31.295778] RSP: 002b:00007ffdbb5bbdf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.296676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4def19d82 [ 31.297525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4de353000 [ 31.298654] RBP: 00007fa4de353000 R08: 0000000000000009 R09: 0000000000001000 [ 31.299788] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4eff1bb20 [ 31.300865] R13: 00007ffdbb5bbe10 R14: 00007ffdbb5bbe40 R15: 00007ffdbb5bc1a0 [ 31.302040] [ 31.302430] [ 31.302715] Allocated by task 214: [ 31.303285] kasan_save_stack+0x22/0x50 [ 31.303968] kasan_set_track+0x25/0x30 [ 31.304623] __kasan_slab_alloc+0x59/0x70 [ 31.305318] kmem_cache_alloc+0x16b/0x370 [ 31.305989] vm_area_dup+0x20/0x160 [ 31.306561] __split_vma+0x170/0x950 [ 31.307184] split_vma+0xc6/0x110 [ 31.307769] mprotect_fixup+0x8d2/0xb30 [ 31.308439] do_mprotect_pkey+0x87e/0xd40 [ 31.309132] __x64_sys_mprotect+0x78/0xc0 [ 31.309813] do_syscall_64+0x3f/0x90 [ 31.310408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311249] [ 31.311536] Freed by task 19: [ 31.312047] kasan_save_stack+0x22/0x50 [ 31.312721] kasan_set_track+0x25/0x30 [ 31.313375] kasan_save_free_info+0x2b/0x50 [ 31.314114] __kasan_slab_free+0x10a/0x190 [ 31.314794] kmem_cache_free+0x10d/0x4d0 [ 31.315377] rcu_core+0x8c8/0x2860 [ 31.315887] __do_softirq+0x1b7/0x7d4 [ 31.316430] [ 31.316674] Last potentially related work creation: [ 31.317254] kasan_save_stack+0x22/0x50 [ 31.317757] __kasan_record_aux_stack+0x8e/0xa0 [ 31.318333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.319040] remove_vma+0x139/0x170 [ 31.319562] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.320205] do_vmi_munmap+0x1f1/0x2b0 [ 31.320768] __vm_munmap+0x138/0x3a0 [ 31.321305] __x64_sys_munmap+0x59/0x80 [ 31.321878] do_syscall_64+0x3f/0x90 [ 31.322441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323191] [ 31.323438] The buggy address belongs to the object at ffff88800f8a3ae0 [ 31.323438] which belongs to the cache vm_area_struct of size 168 [ 31.325144] The buggy address is located 88 bytes inside of [ 31.325144] freed 168-byte region [ffff88800f8a3ae0, ffff88800f8a3b88) [ 31.326792] [ 31.327042] The buggy address belongs to the physical page: [ 31.327813] page:0000000077281693 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf8a3 [ 31.329006] memcg:ffff88800febed01 [ 31.329437] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.330095] page_type: 0xffffffff() [ 31.330543] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.331593] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800febed01 [ 31.332636] page dumped because: kasan: bad access detected [ 31.333291] [ 31.333508] Memory state around the buggy address: [ 31.334176] ffff88800f8a3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.335165] ffff88800f8a3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.336152] >ffff88800f8a3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.337143] ^ [ 31.337857] ffff88800f8a3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.338855] ffff88800f8a3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.339842] ================================================================== [ 31.341014] Disabling lock debugging due to kernel taint [ 33.962814] BUG: Bad rss-counter state mm:0000000083f9dadf type:MM_FILEPAGES val:33 [ 33.963981] BUG: Bad rss-counter state mm:0000000083f9dadf type:MM_ANONPAGES val:22 [ 34.413770] BUG: Bad rss-counter state mm:00000000f89b1d66 type:MM_FILEPAGES val:33 [ 34.414943] BUG: Bad rss-counter state mm:00000000f89b1d66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11659' (ECDSA) to the list of known hosts. 2023/06/20 11:20:37 fuzzer started 2023/06/20 11:20:38 dialing manager at localhost:36067 2023/06/20 11:20:38 checking machine... 2023/06/20 11:20:38 checking revisions... [ 35.051035] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:20:38 testing simple program... [ 35.098817] cgroup: Unknown subsys name 'net' [ 35.157789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888017caf720 RCX=0000000000000001 RDX=1ffff11002f95ee5 RSI=ffffffff8180803b RDI=ffff888017caf728 RBP=0000000000000003 RSP=ffff888017caf638 R8 =0000000000000001 R9 =ffff888017caf698 R10=0000000000038001 R11=0000000000020de5 R12=ffff888017caf720 R13=0000000000000000 R14=ffff888017d8b680 R15=0000000000092cc0 RIP=ffffffff813ad4cf RFL=00000287 [--S--PC] 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 00007ff831c67900 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=00007ff83221e618 CR3=000000001cd98000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fe472cab000 CR3=000000000c5b2000 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=7f01fd859bcedb9d11447a12a1da0e24 XMM02=2c67c8bc2e329bc3000000000011d558 XMM03=fb795ef6d65770560000000000121a28 XMM04=082e8921cb20e92200000000000ae988 XMM05=e4cb8bb95a7664b60000000000131ac8 XMM06=76ddb736ae842b740000000000130930 XMM07=e042d86d42eb936e0000000000121ca8 XMM08=6ffcbf96df2b1aad000000000011d5b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000