syzkaller login: [ 31.547897] BUG: Bad rss-counter state mm:000000009f81e7d1 type:MM_FILEPAGES val:33 [ 31.548938] BUG: Bad rss-counter state mm:000000009f81e7d1 type:MM_ANONPAGES val:22 [ 31.703587] ================================================================== [ 31.704543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.705491] Read of size 8 at addr ffff88800e2a3a50 by task sshd/220 [ 31.706256] [ 31.706471] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.707481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.708495] Call Trace: [ 31.708824] [ 31.709119] dump_stack_lvl+0x91/0xf0 [ 31.709638] print_report+0xcc/0x620 [ 31.710132] ? __virt_addr_valid+0x102/0x340 [ 31.710688] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.711326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.711981] kasan_report+0xbe/0xf0 [ 31.712463] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.713110] vma_interval_tree_remove+0xc75/0xec0 [ 31.713726] vma_prepare+0xc54/0x11a0 [ 31.714203] __split_vma+0x5af/0x950 [ 31.714674] ? __pfx___split_vma+0x10/0x10 [ 31.715200] ? find_held_lock+0x2c/0x110 [ 31.715717] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.716302] ? lock_is_held_type+0x9f/0x120 [ 31.716880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.717497] ? mtree_range_walk+0x632/0x900 [ 31.718061] ? mas_walk+0x5c7/0x7c0 [ 31.718546] do_vmi_munmap+0x1f1/0x2b0 [ 31.719041] mmap_region+0x1f9/0x2660 [ 31.719543] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.720070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.720791] ? __pfx_lock_acquire+0x10/0x10 [ 31.721333] ? __pfx_mmap_region+0x10/0x10 [ 31.721868] ? security_mmap_addr+0x7d/0xa0 [ 31.722412] ? get_unmapped_area+0x1f5/0x3f0 [ 31.722975] do_mmap+0x854/0xf00 [ 31.723417] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.723927] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.724495] ksys_mmap_pgoff+0x3af/0x500 [ 31.725015] do_syscall_64+0x3f/0x90 [ 31.725500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.726158] RIP: 0033:0x7fa880f5ed82 [ 31.726615] 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 [ 31.728736] RSP: 002b:00007ffe1c1e14e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.729638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa880f5ed82 [ 31.730494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa880398000 [ 31.731341] RBP: 00007fa880398000 R08: 0000000000000009 R09: 0000000000001000 [ 31.732209] R10: 0000000000000812 R11: 0000000000000206 R12: 000056482f71df70 [ 31.733052] R13: 00007ffe1c1e1500 R14: 00007ffe1c1e1530 R15: 00007ffe1c1e1890 [ 31.733924] [ 31.734217] [ 31.734441] Allocated by task 213: [ 31.734885] kasan_save_stack+0x22/0x50 [ 31.735402] kasan_set_track+0x25/0x30 [ 31.735902] __kasan_slab_alloc+0x59/0x70 [ 31.736422] kmem_cache_alloc+0x16b/0x370 [ 31.736945] vm_area_dup+0x20/0x160 [ 31.737397] __split_vma+0x170/0x950 [ 31.737868] split_vma+0xc6/0x110 [ 31.738318] mprotect_fixup+0x8d2/0xb30 [ 31.738826] do_mprotect_pkey+0x87e/0xd40 [ 31.739347] __x64_sys_mprotect+0x78/0xc0 [ 31.739868] do_syscall_64+0x3f/0x90 [ 31.740344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.740993] [ 31.741217] Freed by task 213: [ 31.741620] kasan_save_stack+0x22/0x50 [ 31.742126] kasan_set_track+0x25/0x30 [ 31.742628] kasan_save_free_info+0x2b/0x50 [ 31.743158] __kasan_slab_free+0x10a/0x190 [ 31.743690] kmem_cache_free+0x10d/0x4d0 [ 31.744210] rcu_core+0x8c8/0x2860 [ 31.744651] __do_softirq+0x1b7/0x7d4 [ 31.745132] [ 31.745348] Last potentially related work creation: [ 31.745930] kasan_save_stack+0x22/0x50 [ 31.746440] __kasan_record_aux_stack+0x8e/0xa0 [ 31.747014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.747662] remove_vma+0x139/0x170 [ 31.748123] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.748674] do_vmi_munmap+0x1f1/0x2b0 [ 31.749189] __vm_munmap+0x138/0x3a0 [ 31.749665] __x64_sys_munmap+0x59/0x80 [ 31.750161] do_syscall_64+0x3f/0x90 [ 31.750636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.751281] [ 31.751503] Second to last potentially related work creation: [ 31.752214] kasan_save_stack+0x22/0x50 [ 31.752712] __kasan_record_aux_stack+0x8e/0xa0 [ 31.753286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.753931] remove_vma+0x139/0x170 [ 31.754386] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.754961] do_vmi_munmap+0x1f1/0x2b0 [ 31.755445] mmap_region+0x1f9/0x2660 [ 31.755943] do_mmap+0x854/0xf00 [ 31.756369] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.756870] ksys_mmap_pgoff+0x3af/0x500 [ 31.757376] do_syscall_64+0x3f/0x90 [ 31.757848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.758489] [ 31.758707] The buggy address belongs to the object at ffff88800e2a39f8 [ 31.758707] which belongs to the cache vm_area_struct of size 168 [ 31.760186] The buggy address is located 88 bytes inside of [ 31.760186] freed 168-byte region [ffff88800e2a39f8, ffff88800e2a3aa0) [ 31.761598] [ 31.761816] The buggy address belongs to the physical page: [ 31.762470] page:000000002ec9aedd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2a3 [ 31.763573] memcg:ffff88800d21d301 [ 31.764007] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.764716] page_type: 0xffffffff() [ 31.765165] raw: 0100000000000200 ffff8880087a0c80 ffffea000038f780 dead000000000003 [ 31.766084] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d21d301 [ 31.766996] page dumped because: kasan: bad access detected [ 31.767661] [ 31.767882] Memory state around the buggy address: [ 31.768459] ffff88800e2a3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.769315] ffff88800e2a3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.770196] >ffff88800e2a3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.771062] ^ [ 31.771826] ffff88800e2a3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.772708] ffff88800e2a3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.773591] ================================================================== [ 31.774524] Disabling lock debugging due to kernel taint [ 33.738690] BUG: Bad rss-counter state mm:00000000c8cdb88f type:MM_FILEPAGES val:33 [ 33.739862] BUG: Bad rss-counter state mm:00000000c8cdb88f type:MM_ANONPAGES val:22 [ 34.161021] BUG: Bad rss-counter state mm:00000000a0f397a6 type:MM_FILEPAGES val:33 [ 34.161799] BUG: Bad rss-counter state mm:00000000a0f397a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8809' (ECDSA) to the list of known hosts. 2023/06/20 15:47:22 fuzzer started 2023/06/20 15:47:22 dialing manager at localhost:36067 2023/06/20 15:47:22 checking machine... 2023/06/20 15:47:22 checking revisions... [ 34.936945] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:47:23 testing simple program... [ 34.997044] cgroup: Unknown subsys name 'net' [ 35.040868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:47:22 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd8414d918 CR3=0000000016292000 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=2032323a37343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a37343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000202 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800e8ec980 RBP=ffff88800e8ec980 RSP=ffff88800d9d7770 R8 =0000000000000000 R9 =ffffed1001d1d930 R10=ffff88800e8ec983 R11=00000000000b6a61 R12=ffff88800e8eca10 R13=ffff88800e8ec9c0 R14=ffffffff8366b8df R15=0000000000000000 RIP=ffffffff84535ff7 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 00007fbf4975c900 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=00007fbf49d13618 CR3=000000000ef54000 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=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