syzkaller login: [ 31.605837] BUG: Bad rss-counter state mm:000000003c391369 type:MM_FILEPAGES val:33 [ 31.607689] BUG: Bad rss-counter state mm:000000003c391369 type:MM_ANONPAGES val:22 [ 31.772019] ================================================================== [ 31.772934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.773890] Read of size 8 at addr ffff88800de816b0 by task sshd/219 [ 31.774670] [ 31.774888] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.775865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.776850] Call Trace: [ 31.777181] [ 31.777463] dump_stack_lvl+0x91/0xf0 [ 31.777964] print_report+0xcc/0x620 [ 31.778451] ? __virt_addr_valid+0x102/0x340 [ 31.779013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.779648] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780285] kasan_report+0xbe/0xf0 [ 31.780763] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.781389] vma_interval_tree_remove+0xc75/0xec0 [ 31.781998] vma_prepare+0xc54/0x11a0 [ 31.782481] __split_vma+0x5af/0x950 [ 31.782968] ? __pfx___split_vma+0x10/0x10 [ 31.783507] ? find_held_lock+0x2c/0x110 [ 31.784041] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.784611] ? lock_is_held_type+0x9f/0x120 [ 31.785152] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.785765] ? mtree_range_walk+0x632/0x900 [ 31.786323] ? mas_walk+0x5c7/0x7c0 [ 31.786805] do_vmi_munmap+0x1f1/0x2b0 [ 31.787325] mmap_region+0x1f9/0x2660 [ 31.787819] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.788334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.789056] ? __pfx_lock_acquire+0x10/0x10 [ 31.789592] ? __pfx_mmap_region+0x10/0x10 [ 31.790127] ? security_mmap_addr+0x7d/0xa0 [ 31.790664] ? get_unmapped_area+0x1f5/0x3f0 [ 31.791223] do_mmap+0x854/0xf00 [ 31.791673] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.792175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.792744] ksys_mmap_pgoff+0x3af/0x500 [ 31.793259] do_syscall_64+0x3f/0x90 [ 31.793744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.794414] RIP: 0033:0x7f5f4a797d82 [ 31.794883] 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 [ 31.797031] RSP: 002b:00007ffc792e7948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.797930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f4a797d82 [ 31.798768] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f49bd1000 [ 31.799624] RBP: 00007f5f49bd1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.800464] R10: 0000000000000812 R11: 0000000000000206 R12: 000056551bb55ec0 [ 31.801328] R13: 00007ffc792e7960 R14: 00007ffc792e7990 R15: 00007ffc792e7cf0 [ 31.802202] [ 31.802497] [ 31.802714] Allocated by task 212: [ 31.803152] kasan_save_stack+0x22/0x50 [ 31.803660] kasan_set_track+0x25/0x30 [ 31.804164] __kasan_slab_alloc+0x59/0x70 [ 31.804694] kmem_cache_alloc+0x16b/0x370 [ 31.805221] vm_area_dup+0x20/0x160 [ 31.805681] __split_vma+0x170/0x950 [ 31.806151] split_vma+0xc6/0x110 [ 31.806593] mprotect_fixup+0x8d2/0xb30 [ 31.807121] do_mprotect_pkey+0x87e/0xd40 [ 31.807644] __x64_sys_mprotect+0x78/0xc0 [ 31.808175] do_syscall_64+0x3f/0x90 [ 31.808651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.809294] [ 31.809512] Freed by task 212: [ 31.809915] kasan_save_stack+0x22/0x50 [ 31.810415] kasan_set_track+0x25/0x30 [ 31.810908] kasan_save_free_info+0x2b/0x50 [ 31.811448] __kasan_slab_free+0x10a/0x190 [ 31.811983] kmem_cache_free+0x10d/0x4d0 [ 31.812492] rcu_core+0x8c8/0x2860 [ 31.812942] __do_softirq+0x1b7/0x7d4 [ 31.813425] [ 31.813645] Last potentially related work creation: [ 31.814227] kasan_save_stack+0x22/0x50 [ 31.814731] __kasan_record_aux_stack+0x8e/0xa0 [ 31.815333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.815980] remove_vma+0x139/0x170 [ 31.816435] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.816989] do_vmi_munmap+0x1f1/0x2b0 [ 31.817478] __vm_munmap+0x138/0x3a0 [ 31.817962] __x64_sys_munmap+0x59/0x80 [ 31.818479] do_syscall_64+0x3f/0x90 [ 31.818973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.819643] [ 31.819865] The buggy address belongs to the object at ffff88800de81658 [ 31.819865] which belongs to the cache vm_area_struct of size 168 [ 31.821343] The buggy address is located 88 bytes inside of [ 31.821343] freed 168-byte region [ffff88800de81658, ffff88800de81700) [ 31.822747] [ 31.822965] The buggy address belongs to the physical page: [ 31.823656] page:00000000bb486c9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde81 [ 31.824762] memcg:ffff88800e12c101 [ 31.825196] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.825888] page_type: 0xffffffff() [ 31.826343] raw: 0100000000000200 ffff8880087a0c80 ffffea0000262280 dead000000000003 [ 31.827277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e12c101 [ 31.828192] page dumped because: kasan: bad access detected [ 31.828862] [ 31.829088] Memory state around the buggy address: [ 31.829662] ffff88800de81580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.830517] ffff88800de81600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.831380] >ffff88800de81680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.832246] ^ [ 31.832870] ffff88800de81700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.833787] ffff88800de81780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.834708] ================================================================== [ 31.835821] Disabling lock debugging due to kernel taint [ 33.733016] BUG: Bad rss-counter state mm:000000005558d07a type:MM_FILEPAGES val:33 [ 33.734194] BUG: Bad rss-counter state mm:000000005558d07a type:MM_ANONPAGES val:22 [ 34.317006] BUG: Bad rss-counter state mm:000000001296d7ac type:MM_FILEPAGES val:33 [ 34.318170] BUG: Bad rss-counter state mm:000000001296d7ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62593' (ECDSA) to the list of known hosts. 2023/06/20 15:41:05 fuzzer started 2023/06/20 15:41:05 dialing manager at localhost:36067 2023/06/20 15:41:05 checking machine... 2023/06/20 15:41:05 checking revisions... [ 34.969109] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:41:05 testing simple program... [ 35.018300] cgroup: Unknown subsys name 'net' [ 35.059132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:41:04 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=1ffff11001db3e85 RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800ed9f400 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000af100000af1 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f12f RFL=00000246 [---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 00007fb7f81b8900 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=00007fb7f876f618 CR3=000000000d646000 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=ffff888008c04400 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=00007f1c79084eb0 CR3=0000000013a4c000 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=abbb7b5546249495f349a28ef43f08b4 XMM02=2c67c8bc2e329bc3000000000011bd08 XMM03=fb795ef6d65770560000000000121f10 XMM04=7ab713a981f94bd100000000000ae988 XMM05=e4cb8bb95a7664b60000000000131ab8 XMM06=dc60f2d8abbb23950000000000130c90 XMM07=e042d86d42eb936e0000000000122190 XMM08=9e9a32ea19bf06a4000000000011bd68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000