syzkaller login: [ 31.058518] BUG: Bad rss-counter state mm:000000007ade59ec type:MM_FILEPAGES val:33 [ 31.059711] BUG: Bad rss-counter state mm:000000007ade59ec type:MM_ANONPAGES val:22 [ 31.136812] ================================================================== [ 31.137758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.138895] Read of size 8 at addr ffff888009093a50 by task sshd/220 [ 31.139688] [ 31.139910] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.140850] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.141851] Call Trace: [ 31.142210] [ 31.142497] dump_stack_lvl+0x91/0xf0 [ 31.142993] print_report+0xcc/0x620 [ 31.143502] ? __virt_addr_valid+0x102/0x340 [ 31.144049] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144712] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145350] kasan_report+0xbe/0xf0 [ 31.145826] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.146471] vma_interval_tree_remove+0xc75/0xec0 [ 31.147075] vma_prepare+0xc54/0x11a0 [ 31.147571] __split_vma+0x5af/0x950 [ 31.148055] ? __pfx___split_vma+0x10/0x10 [ 31.148615] ? find_held_lock+0x2c/0x110 [ 31.149152] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.149744] ? lock_is_held_type+0x9f/0x120 [ 31.150317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.150925] ? mtree_range_walk+0x632/0x900 [ 31.151497] ? mas_walk+0x5c7/0x7c0 [ 31.151977] do_vmi_munmap+0x1f1/0x2b0 [ 31.152504] mmap_region+0x1f9/0x2660 [ 31.152994] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.153526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154265] ? __pfx_lock_acquire+0x10/0x10 [ 31.154801] ? __pfx_mmap_region+0x10/0x10 [ 31.155365] ? security_mmap_addr+0x7d/0xa0 [ 31.155909] ? get_unmapped_area+0x1f5/0x3f0 [ 31.156493] do_mmap+0x854/0xf00 [ 31.156944] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.157458] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.158017] ksys_mmap_pgoff+0x3af/0x500 [ 31.158549] do_syscall_64+0x3f/0x90 [ 31.159025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159691] RIP: 0033:0x7f7263474d82 [ 31.160173] 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 [ 31.162366] RSP: 002b:00007ffe496db298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.163298] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7263474d82 [ 31.164167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72628ae000 [ 31.165037] RBP: 00007f72628ae000 R08: 0000000000000009 R09: 0000000000001000 [ 31.165902] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdd88e0ec0 [ 31.166782] R13: 00007ffe496db2b0 R14: 00007ffe496db2e0 R15: 00007ffe496db640 [ 31.167683] [ 31.167989] [ 31.168245] Allocated by task 213: [ 31.168694] kasan_save_stack+0x22/0x50 [ 31.169240] kasan_set_track+0x25/0x30 [ 31.169750] __kasan_slab_alloc+0x59/0x70 [ 31.170336] kmem_cache_alloc+0x16b/0x370 [ 31.170881] vm_area_dup+0x20/0x160 [ 31.171384] __split_vma+0x170/0x950 [ 31.171872] split_vma+0xc6/0x110 [ 31.172359] mprotect_fixup+0x8d2/0xb30 [ 31.172892] do_mprotect_pkey+0x87e/0xd40 [ 31.173454] __x64_sys_mprotect+0x78/0xc0 [ 31.174002] do_syscall_64+0x3f/0x90 [ 31.174539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.175242] [ 31.175463] Freed by task 213: [ 31.175872] kasan_save_stack+0x22/0x50 [ 31.176434] kasan_set_track+0x25/0x30 [ 31.176951] kasan_save_free_info+0x2b/0x50 [ 31.177529] __kasan_slab_free+0x10a/0x190 [ 31.178085] kmem_cache_free+0x10d/0x4d0 [ 31.178648] rcu_core+0x8c8/0x2860 [ 31.179119] __do_softirq+0x1b7/0x7d4 [ 31.179710] [ 31.179930] Last potentially related work creation: [ 31.180585] kasan_save_stack+0x22/0x50 [ 31.181108] __kasan_record_aux_stack+0x8e/0xa0 [ 31.181722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.182428] remove_vma+0x139/0x170 [ 31.182902] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.183501] do_vmi_munmap+0x1f1/0x2b0 [ 31.184007] __vm_munmap+0x138/0x3a0 [ 31.184529] __x64_sys_munmap+0x59/0x80 [ 31.185060] do_syscall_64+0x3f/0x90 [ 31.185573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186277] [ 31.186509] The buggy address belongs to the object at ffff8880090939f8 [ 31.186509] which belongs to the cache vm_area_struct of size 168 [ 31.188074] The buggy address is located 88 bytes inside of [ 31.188074] freed 168-byte region [ffff8880090939f8, ffff888009093aa0) [ 31.189594] [ 31.189820] The buggy address belongs to the physical page: [ 31.190560] page:00000000886fbdea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9093 [ 31.191714] memcg:ffff88801624e601 [ 31.192182] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.192876] page_type: 0xffffffff() [ 31.193378] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.194377] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801624e601 [ 31.195361] page dumped because: kasan: bad access detected [ 31.196064] [ 31.196320] Memory state around the buggy address: [ 31.196936] ffff888009093900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.197874] ffff888009093980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.198815] >ffff888009093a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.199740] ^ [ 31.200510] ffff888009093a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.201438] ffff888009093b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.202367] ================================================================== [ 31.203354] Disabling lock debugging due to kernel taint [ 33.399239] BUG: Bad rss-counter state mm:00000000ad9dc94d type:MM_FILEPAGES val:33 [ 33.400278] BUG: Bad rss-counter state mm:00000000ad9dc94d type:MM_ANONPAGES val:22 [ 33.848146] BUG: Bad rss-counter state mm:000000001f065b0a type:MM_FILEPAGES val:33 [ 33.849696] BUG: Bad rss-counter state mm:000000001f065b0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32183' (ECDSA) to the list of known hosts. 2023/06/20 19:26:05 fuzzer started 2023/06/20 19:26:05 dialing manager at localhost:36067 2023/06/20 19:26:05 checking machine... 2023/06/20 19:26:05 checking revisions... [ 34.658633] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:26:05 testing simple program... [ 34.703606] cgroup: Unknown subsys name 'net' [ 34.741430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:26:05 Registers: info registers vcpu 0 RAX=ffffffff861436df RBX=0000000000000001 RCX=ffffffff861436da RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c286db RBP=ffff8880160d7930 RSP=ffff8880160d7868 R8 =ffffffff861436de R9 =ffff8880160d7918 R10=0000000000038001 R11=00000000000229a3 R12=ffff8880160d7938 R13=ffff8880160d7920 R14=ffff8880160d7919 R15=ffff8880160d78d8 RIP=ffffffff81130aa8 RFL=00000217 [----APC] 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 00007f5f6331f900 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=00007f5f638d6618 CR3=000000001bc3c000 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=563412feff00545000000000000080fe 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88806cf09db8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000283 R13=ffff88800e34fd58 R14=ffffffff8186b835 R15=ffff88800eff8b80 RIP=ffffffff815342e3 RFL=00000047 [---Z-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 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=00007f658c524890 CR3=000000000c810000 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=ccf1e63f961a0ba096466a7fa31d3c9b XMM02=2c67c8bc2e329bc3000000000011ac70 XMM03=fb795ef6d65770560000000000122130 XMM04=da8654fb60d6017400000000000ae988 XMM05=19e9129bd510f2350000000000131fa8 XMM06=46cd93a7ea826c1c0000000000130e10 XMM07=e042d86d42eb936e00000000001223b0 XMM08=60bfc0dcb3046bac000000000011acd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000