syzkaller login: [ 30.123616] BUG: Bad rss-counter state mm:00000000037830da type:MM_FILEPAGES val:33 [ 30.125621] BUG: Bad rss-counter state mm:00000000037830da type:MM_ANONPAGES val:22 [ 30.286021] ================================================================== [ 30.286953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.287918] Read of size 8 at addr ffff88800e052310 by task sshd/219 [ 30.288700] [ 30.288920] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.289949] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.290960] Call Trace: [ 30.291291] [ 30.291601] dump_stack_lvl+0x91/0xf0 [ 30.292106] print_report+0xcc/0x620 [ 30.292595] ? __virt_addr_valid+0x102/0x340 [ 30.293151] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.293771] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.294391] kasan_report+0xbe/0xf0 [ 30.294897] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.295524] vma_interval_tree_remove+0xc75/0xec0 [ 30.296128] vma_prepare+0xc54/0x11a0 [ 30.296610] __split_vma+0x5af/0x950 [ 30.297089] ? __pfx___split_vma+0x10/0x10 [ 30.297618] ? find_held_lock+0x2c/0x110 [ 30.298139] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.298706] ? lock_is_held_type+0x9f/0x120 [ 30.299261] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.299873] ? mtree_range_walk+0x632/0x900 [ 30.300423] ? mas_walk+0x5c7/0x7c0 [ 30.300900] do_vmi_munmap+0x1f1/0x2b0 [ 30.301399] mmap_region+0x1f9/0x2660 [ 30.301887] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.302410] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.303130] ? __pfx_lock_acquire+0x10/0x10 [ 30.303675] ? __pfx_mmap_region+0x10/0x10 [ 30.304203] ? security_mmap_addr+0x7d/0xa0 [ 30.304747] ? get_unmapped_area+0x1f5/0x3f0 [ 30.305297] do_mmap+0x854/0xf00 [ 30.305738] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.306240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.306812] ksys_mmap_pgoff+0x3af/0x500 [ 30.307325] do_syscall_64+0x3f/0x90 [ 30.307806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.308454] RIP: 0033:0x7f4cab156d82 [ 30.308912] 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 [ 30.311081] RSP: 002b:00007fff111ea018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.311994] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cab156d82 [ 30.312842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4caa590000 [ 30.313699] RBP: 00007f4caa590000 R08: 0000000000000009 R09: 0000000000001000 [ 30.314541] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556181c32f60 [ 30.315398] R13: 00007fff111ea030 R14: 00007fff111ea060 R15: 00007fff111ea3c0 [ 30.316250] [ 30.316546] [ 30.316761] Allocated by task 212: [ 30.317193] kasan_save_stack+0x22/0x50 [ 30.317697] kasan_set_track+0x25/0x30 [ 30.318198] __kasan_slab_alloc+0x59/0x70 [ 30.318724] kmem_cache_alloc+0x16b/0x370 [ 30.319252] vm_area_dup+0x20/0x160 [ 30.319711] __split_vma+0x170/0x950 [ 30.320185] split_vma+0xc6/0x110 [ 30.320624] mprotect_fixup+0x8d2/0xb30 [ 30.321123] do_mprotect_pkey+0x87e/0xd40 [ 30.321653] __x64_sys_mprotect+0x78/0xc0 [ 30.322184] do_syscall_64+0x3f/0x90 [ 30.322663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323321] [ 30.323540] Freed by task 212: [ 30.323931] kasan_save_stack+0x22/0x50 [ 30.324434] kasan_set_track+0x25/0x30 [ 30.324926] kasan_save_free_info+0x2b/0x50 [ 30.325464] __kasan_slab_free+0x10a/0x190 [ 30.326004] kmem_cache_free+0x10d/0x4d0 [ 30.326511] rcu_core+0x8c8/0x2860 [ 30.326977] __do_softirq+0x1b7/0x7d4 [ 30.327461] [ 30.327680] Last potentially related work creation: [ 30.328282] kasan_save_stack+0x22/0x50 [ 30.328791] __kasan_record_aux_stack+0x8e/0xa0 [ 30.329371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.330019] remove_vma+0x139/0x170 [ 30.330560] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.331157] do_vmi_munmap+0x1f1/0x2b0 [ 30.331645] __vm_munmap+0x138/0x3a0 [ 30.332111] __x64_sys_munmap+0x59/0x80 [ 30.332618] do_syscall_64+0x3f/0x90 [ 30.333091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.333739] [ 30.333955] Second to last potentially related work creation: [ 30.334656] kasan_save_stack+0x22/0x50 [ 30.335169] __kasan_record_aux_stack+0x8e/0xa0 [ 30.335755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.336412] remove_vma+0x139/0x170 [ 30.336876] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.337439] do_vmi_munmap+0x1f1/0x2b0 [ 30.337934] mmap_region+0x1f9/0x2660 [ 30.338417] do_mmap+0x854/0xf00 [ 30.338862] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.339360] ksys_mmap_pgoff+0x3af/0x500 [ 30.339861] do_syscall_64+0x3f/0x90 [ 30.340342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340984] [ 30.341205] The buggy address belongs to the object at ffff88800e0522b8 [ 30.341205] which belongs to the cache vm_area_struct of size 168 [ 30.342686] The buggy address is located 88 bytes inside of [ 30.342686] freed 168-byte region [ffff88800e0522b8, ffff88800e052360) [ 30.344121] [ 30.344339] The buggy address belongs to the physical page: [ 30.344995] page:0000000097447597 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe052 [ 30.346083] memcg:ffff88800dedfb01 [ 30.346507] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.347161] page_type: 0xffffffff() [ 30.347612] raw: 0100000000000200 ffff88800879fc80 ffffea000038f6c0 dead000000000004 [ 30.348524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dedfb01 [ 30.349430] page dumped because: kasan: bad access detected [ 30.350093] [ 30.350311] Memory state around the buggy address: [ 30.350904] ffff88800e052200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.351756] ffff88800e052280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.352604] >ffff88800e052300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.353464] ^ [ 30.353930] ffff88800e052380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.354793] ffff88800e052400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.355665] ================================================================== [ 30.356606] Disabling lock debugging due to kernel taint [ 32.328043] BUG: Bad rss-counter state mm:00000000d2c5e6be type:MM_FILEPAGES val:33 [ 32.329029] BUG: Bad rss-counter state mm:00000000d2c5e6be type:MM_ANONPAGES val:22 [ 32.909467] BUG: Bad rss-counter state mm:000000005b781069 type:MM_FILEPAGES val:33 [ 32.910728] BUG: Bad rss-counter state mm:000000005b781069 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2852' (ECDSA) to the list of known hosts. 2023/06/20 04:38:36 fuzzer started 2023/06/20 04:38:36 dialing manager at localhost:44161 2023/06/20 04:38:36 checking machine... 2023/06/20 04:38:36 checking revisions... [ 33.569796] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:38:36 testing simple program... [ 33.625425] cgroup: Unknown subsys name 'net' [ 33.675250] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:38:34 Registers: info registers vcpu 0 RAX=7fffffffffffffff RBX=ffff88806ce2c250 RCX=ffffffff813bdba4 RDX=ffff88800dae9b40 RSI=0000000000000000 RDI=0000000000000006 RBP=00000000000f4240 RSP=ffff88806ce09dc0 R8 =0000000000000006 R9 =000000079c6a8e40 R10=000000079c5b4c00 R11=0000000000000001 R12=000000079c6a8e40 R13=000000079c5b4c00 R14=0000000000000001 R15=000000079c5b4c00 RIP=ffffffff814c07e4 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 00007f5290c57900 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=00007f529120f0b0 CR3=000000000f7ee000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f529120c650 CR3=0000000019b0e000 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=2035333a38333a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a38333a3430203032 XMM08=65747379732f646d65747379732f6269 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000