syzkaller login: [ 30.102177] sshd (214) used greatest stack depth: 24128 bytes left [ 30.104721] BUG: Bad rss-counter state mm:0000000002da1d32 type:MM_FILEPAGES val:33 [ 30.105917] BUG: Bad rss-counter state mm:0000000002da1d32 type:MM_ANONPAGES val:22 [ 30.271933] ================================================================== [ 30.272879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.273854] Read of size 8 at addr ffff888019e80c20 by task sshd/221 [ 30.274664] [ 30.274954] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.275874] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.276879] Call Trace: [ 30.277208] [ 30.277501] dump_stack_lvl+0x91/0xf0 [ 30.278008] print_report+0xcc/0x620 [ 30.278505] ? __virt_addr_valid+0x102/0x340 [ 30.279083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.279740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280377] kasan_report+0xbe/0xf0 [ 30.280875] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.281510] vma_interval_tree_remove+0xc75/0xec0 [ 30.282130] vma_prepare+0xc54/0x11a0 [ 30.282628] __split_vma+0x5af/0x950 [ 30.283115] ? __pfx___split_vma+0x10/0x10 [ 30.283673] ? find_held_lock+0x2c/0x110 [ 30.284211] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.284893] ? lock_is_held_type+0x9f/0x120 [ 30.285577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.286253] ? mtree_range_walk+0x632/0x900 [ 30.286865] ? mas_walk+0x5c7/0x7c0 [ 30.287363] do_vmi_munmap+0x1f1/0x2b0 [ 30.287911] mmap_region+0x1f9/0x2660 [ 30.288406] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.288960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.289707] ? __pfx_lock_acquire+0x10/0x10 [ 30.290307] ? __pfx_mmap_region+0x10/0x10 [ 30.290860] ? security_mmap_addr+0x7d/0xa0 [ 30.291425] ? get_unmapped_area+0x1f5/0x3f0 [ 30.291996] do_mmap+0x854/0xf00 [ 30.292453] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.292971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.293567] ksys_mmap_pgoff+0x3af/0x500 [ 30.294094] do_syscall_64+0x3f/0x90 [ 30.294592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.295271] RIP: 0033:0x7f758eaedd82 [ 30.295763] 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 [ 30.297998] RSP: 002b:00007fff490bca88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.299015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f758eaedd82 [ 30.300161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f758df27000 [ 30.301131] RBP: 00007f758df27000 R08: 0000000000000009 R09: 0000000000001000 [ 30.302042] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bee827dec0 [ 30.302934] R13: 00007fff490bcaa0 R14: 00007fff490bcad0 R15: 00007fff490bce30 [ 30.303856] [ 30.304161] [ 30.304387] Allocated by task 214: [ 30.304854] kasan_save_stack+0x22/0x50 [ 30.305375] kasan_set_track+0x25/0x30 [ 30.305921] __kasan_slab_alloc+0x59/0x70 [ 30.306471] kmem_cache_alloc+0x16b/0x370 [ 30.307035] vm_area_dup+0x20/0x160 [ 30.307548] __split_vma+0x170/0x950 [ 30.308052] split_vma+0xc6/0x110 [ 30.308512] mprotect_fixup+0x8d2/0xb30 [ 30.309060] do_mprotect_pkey+0x87e/0xd40 [ 30.309617] __x64_sys_mprotect+0x78/0xc0 [ 30.310189] do_syscall_64+0x3f/0x90 [ 30.310691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.311376] [ 30.311627] Freed by task 214: [ 30.312057] kasan_save_stack+0x22/0x50 [ 30.312586] kasan_set_track+0x25/0x30 [ 30.313118] kasan_save_free_info+0x2b/0x50 [ 30.313678] __kasan_slab_free+0x10a/0x190 [ 30.314268] kmem_cache_free+0x10d/0x4d0 [ 30.314808] rcu_core+0x8c8/0x2860 [ 30.315286] __do_softirq+0x1b7/0x7d4 [ 30.315787] [ 30.316007] Last potentially related work creation: [ 30.316615] kasan_save_stack+0x22/0x50 [ 30.317130] __kasan_record_aux_stack+0x8e/0xa0 [ 30.317735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.318400] remove_vma+0x139/0x170 [ 30.318873] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.319472] do_vmi_munmap+0x1f1/0x2b0 [ 30.319979] __vm_munmap+0x138/0x3a0 [ 30.320471] __x64_sys_munmap+0x59/0x80 [ 30.320990] do_syscall_64+0x3f/0x90 [ 30.321491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.322161] [ 30.322382] The buggy address belongs to the object at ffff888019e80bc8 [ 30.322382] which belongs to the cache vm_area_struct of size 168 [ 30.323907] The buggy address is located 88 bytes inside of [ 30.323907] freed 168-byte region [ffff888019e80bc8, ffff888019e80c70) [ 30.325395] [ 30.325623] The buggy address belongs to the physical page: [ 30.326325] page:000000000a83558a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e80 [ 30.327497] memcg:ffff8880189f1b01 [ 30.327946] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.328705] page_type: 0xffffffff() [ 30.329181] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.330138] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880189f1b01 [ 30.331079] page dumped because: kasan: bad access detected [ 30.331781] [ 30.332008] Memory state around the buggy address: [ 30.332619] ffff888019e80b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.333510] ffff888019e80b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.334415] >ffff888019e80c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.335315] ^ [ 30.335868] ffff888019e80c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.336767] ffff888019e80d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.337663] ================================================================== [ 30.338751] Disabling lock debugging due to kernel taint [ 32.344833] BUG: Bad rss-counter state mm:00000000ee50126b type:MM_FILEPAGES val:33 [ 32.345914] BUG: Bad rss-counter state mm:00000000ee50126b type:MM_ANONPAGES val:22 [ 32.855823] BUG: Bad rss-counter state mm:0000000070ff3178 type:MM_FILEPAGES val:33 [ 32.856892] BUG: Bad rss-counter state mm:0000000070ff3178 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60683' (ECDSA) to the list of known hosts. 2023/06/21 01:56:08 fuzzer started 2023/06/21 01:56:08 dialing manager at localhost:36067 2023/06/21 01:56:08 checking machine... 2023/06/21 01:56:08 checking revisions... [ 33.620784] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:56:09 testing simple program... [ 33.671983] cgroup: Unknown subsys name 'net' [ 33.709254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff8880147276e0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0030733a745f6c65 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff110028e4edd RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007fe225f64900 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=00007fe2253c9c80 CR3=000000000c46c000 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=8773e5221a7f12855e4dd8743defb241 XMM02=eff9b2d0a8fce9cb0000000000119968 XMM03=2c67c8bc2e329bc30000000000119a90 XMM04=3b1ad307bd249dd200000000000ae988 XMM05=ef085bf774ff45c90000000000132528 XMM06=e4cb8bb95a7664b60000000000131388 XMM07=fb795ef6d65770560000000000121140 XMM08=2c67c8bc2e329bc30000000000119a90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a8eaab RBX=ffff88800d475528 RCX=1ffff110017332d2 RDX=dffffc0000000000 RSI=ffff88800ca126d0 RDI=ffff88800d475558 RBP=ffff88800b999660 RSP=ffff88800c9efc68 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800ca12500 R13=0000000000000000 R14=ffff88800cb7d2a8 R15=ffff88800cb7d260 RIP=ffffffff8184767e RFL=00000046 [---Z-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 00007f2d64f75900 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=00007ffd80449000 CR3=000000000fbc8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000