syzkaller login: [ 31.438359] BUG: Bad rss-counter state mm:00000000c7dbbb11 type:MM_FILEPAGES val:33 [ 31.439559] BUG: Bad rss-counter state mm:00000000c7dbbb11 type:MM_ANONPAGES val:22 [ 31.585745] ================================================================== [ 31.586858] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.588111] Read of size 8 at addr ffff888014257c20 by task sshd/220 [ 31.589051] [ 31.589314] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.590372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.591385] Call Trace: [ 31.591719] [ 31.592012] dump_stack_lvl+0x91/0xf0 [ 31.592540] print_report+0xcc/0x620 [ 31.593039] ? __virt_addr_valid+0x102/0x340 [ 31.593625] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.594268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.594900] kasan_report+0xbe/0xf0 [ 31.595405] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.596033] vma_interval_tree_remove+0xc75/0xec0 [ 31.596657] vma_prepare+0xc54/0x11a0 [ 31.597153] __split_vma+0x5af/0x950 [ 31.597624] ? __pfx___split_vma+0x10/0x10 [ 31.598188] ? find_held_lock+0x2c/0x110 [ 31.598710] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.599295] ? lock_is_held_type+0x9f/0x120 [ 31.599836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.600470] ? mtree_range_walk+0x632/0x900 [ 31.601035] ? mas_walk+0x5c7/0x7c0 [ 31.601519] do_vmi_munmap+0x1f1/0x2b0 [ 31.602060] mmap_region+0x1f9/0x2660 [ 31.602548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.603075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.603803] ? __pfx_lock_acquire+0x10/0x10 [ 31.604356] ? __pfx_mmap_region+0x10/0x10 [ 31.604898] ? security_mmap_addr+0x7d/0xa0 [ 31.605448] ? get_unmapped_area+0x1f5/0x3f0 [ 31.606020] do_mmap+0x854/0xf00 [ 31.606482] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.606987] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.607576] ksys_mmap_pgoff+0x3af/0x500 [ 31.608123] do_syscall_64+0x3f/0x90 [ 31.608600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.609264] RIP: 0033:0x7f499580cd82 [ 31.609729] 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 [ 31.611897] RSP: 002b:00007ffc8ab74698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.612824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f499580cd82 [ 31.613685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4994c46000 [ 31.614567] RBP: 00007f4994c46000 R08: 0000000000000009 R09: 0000000000001000 [ 31.615428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf53b8ef70 [ 31.616304] R13: 00007ffc8ab746b0 R14: 00007ffc8ab746e0 R15: 00007ffc8ab74a40 [ 31.617175] [ 31.617475] [ 31.617691] Allocated by task 213: [ 31.618154] kasan_save_stack+0x22/0x50 [ 31.618661] kasan_set_track+0x25/0x30 [ 31.619187] __kasan_slab_alloc+0x59/0x70 [ 31.619717] kmem_cache_alloc+0x16b/0x370 [ 31.620263] vm_area_dup+0x20/0x160 [ 31.620725] __split_vma+0x170/0x950 [ 31.621207] split_vma+0xc6/0x110 [ 31.621653] mprotect_fixup+0x8d2/0xb30 [ 31.622195] do_mprotect_pkey+0x87e/0xd40 [ 31.622727] __x64_sys_mprotect+0x78/0xc0 [ 31.623265] do_syscall_64+0x3f/0x90 [ 31.623743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.624414] [ 31.624634] Freed by task 203: [ 31.625037] kasan_save_stack+0x22/0x50 [ 31.625570] kasan_set_track+0x25/0x30 [ 31.626119] kasan_save_free_info+0x2b/0x50 [ 31.626655] __kasan_slab_free+0x10a/0x190 [ 31.627206] kmem_cache_free+0x10d/0x4d0 [ 31.627714] rcu_core+0x8c8/0x2860 [ 31.628191] __do_softirq+0x1b7/0x7d4 [ 31.628673] [ 31.628891] Last potentially related work creation: [ 31.629518] kasan_save_stack+0x22/0x50 [ 31.630057] __kasan_record_aux_stack+0x8e/0xa0 [ 31.630629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.631281] remove_vma+0x139/0x170 [ 31.631734] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.632317] do_vmi_munmap+0x1f1/0x2b0 [ 31.632806] __vm_munmap+0x138/0x3a0 [ 31.633284] __x64_sys_munmap+0x59/0x80 [ 31.633788] do_syscall_64+0x3f/0x90 [ 31.634294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.634936] [ 31.635160] Second to last potentially related work creation: [ 31.635847] kasan_save_stack+0x22/0x50 [ 31.636376] __kasan_record_aux_stack+0x8e/0xa0 [ 31.636953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.637600] remove_vma+0x139/0x170 [ 31.638071] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.638628] do_vmi_munmap+0x1f1/0x2b0 [ 31.639127] mmap_region+0x1f9/0x2660 [ 31.639610] do_mmap+0x854/0xf00 [ 31.640051] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.640559] ksys_mmap_pgoff+0x3af/0x500 [ 31.641077] do_syscall_64+0x3f/0x90 [ 31.641560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.642243] [ 31.642466] The buggy address belongs to the object at ffff888014257bc8 [ 31.642466] which belongs to the cache vm_area_struct of size 168 [ 31.643946] The buggy address is located 88 bytes inside of [ 31.643946] freed 168-byte region [ffff888014257bc8, ffff888014257c70) [ 31.645416] [ 31.645631] The buggy address belongs to the physical page: [ 31.646451] page:00000000af5a4fdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14257 [ 31.647896] memcg:ffff888017d49c01 [ 31.648455] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.649306] page_type: 0xffffffff() [ 31.649944] raw: 0100000000000200 ffff8880087a0c80 ffffea0000563700 dead000000000006 [ 31.651168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d49c01 [ 31.652362] page dumped because: kasan: bad access detected [ 31.653245] [ 31.653491] Memory state around the buggy address: [ 31.654108] ffff888014257b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.654961] ffff888014257b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.655832] >ffff888014257c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.656688] ^ [ 31.657241] ffff888014257c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.658126] ffff888014257d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.658972] ================================================================== [ 31.660114] Disabling lock debugging due to kernel taint [ 33.918000] BUG: Bad rss-counter state mm:000000004110d16f type:MM_FILEPAGES val:33 [ 33.919038] BUG: Bad rss-counter state mm:000000004110d16f type:MM_ANONPAGES val:22 [ 34.507288] BUG: Bad rss-counter state mm:00000000e8c9433b type:MM_FILEPAGES val:33 [ 34.508852] BUG: Bad rss-counter state mm:00000000e8c9433b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11413' (ECDSA) to the list of known hosts. 2023/06/21 06:06:22 fuzzer started 2023/06/21 06:06:23 dialing manager at localhost:36067 2023/06/21 06:06:23 checking machine... 2023/06/21 06:06:23 checking revisions... [ 35.174276] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:06:23 testing simple program... [ 35.213578] cgroup: Unknown subsys name 'net' [ 35.252261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:22 Registers: info registers vcpu 0 RAX=ffffffff8363b743 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019fb7f01 RSI=ffff888019fb7f18 RDI=ffff888019fb7f18 RBP=ffff888019fb78d0 RSP=ffff888019fb7800 R8 =ffffffff863b3570 R9 =ffff888019fb78b8 R10=0000000000038001 R11=000000000008a966 R12=ffff888019fb78d8 R13=ffff888019fb78c0 R14=ffff888019fb7f20 R15=ffff888019fb7878 RIP=ffffffff8112fbf3 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 00007faba4039900 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=00007faba45f0618 CR3=000000000c4dc000 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=00007fc15ae8fd20 CR3=000000000d5ba000 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=6e8ddbd7f53b869f4f4939d69025f652 XMM02=000000000011a9a0ec2efd57dc4c00df XMM03=0000000000121e40ff14591603a03b13 XMM04=76cceb4b3ebe2c6a00000000000ae988 XMM05=19e9129bd510f2350000000000132fb8 XMM06=4fda316b135da52b0000000000132e40 XMM07=e042d86d42eb936e00000000001220c0 XMM08=ff14591603a03b13000000000011aa00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000