syzkaller login: [ 35.650322] BUG: Bad rss-counter state mm:00000000b6b6a61b type:MM_FILEPAGES val:33 [ 35.652414] BUG: Bad rss-counter state mm:00000000b6b6a61b type:MM_ANONPAGES val:22 [ 35.825851] ================================================================== [ 35.826778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.827711] Read of size 8 at addr ffff88800e6db798 by task sshd/220 [ 35.828470] [ 35.828784] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.829641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.830629] Call Trace: [ 35.830977] [ 35.831260] dump_stack_lvl+0x91/0xf0 [ 35.831748] print_report+0xcc/0x620 [ 35.832227] ? __virt_addr_valid+0x102/0x340 [ 35.832773] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.833391] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.834008] kasan_report+0xbe/0xf0 [ 35.834485] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.835142] vma_interval_tree_remove+0xc75/0xec0 [ 35.835757] vma_prepare+0xc54/0x11a0 [ 35.836238] __split_vma+0x5af/0x950 [ 35.836706] ? __pfx___split_vma+0x10/0x10 [ 35.837232] ? find_held_lock+0x2c/0x110 [ 35.837753] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.838321] ? lock_is_held_type+0x9f/0x120 [ 35.838866] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.839472] ? mtree_range_walk+0x632/0x900 [ 35.840017] ? mas_walk+0x5c7/0x7c0 [ 35.840488] do_vmi_munmap+0x1f1/0x2b0 [ 35.840983] mmap_region+0x1f9/0x2660 [ 35.841462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.841972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.842720] ? __pfx_lock_acquire+0x10/0x10 [ 35.843256] ? __pfx_mmap_region+0x10/0x10 [ 35.843787] ? security_mmap_addr+0x7d/0xa0 [ 35.844324] ? get_unmapped_area+0x1f5/0x3f0 [ 35.844871] do_mmap+0x854/0xf00 [ 35.845307] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.845794] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.846349] ksys_mmap_pgoff+0x3af/0x500 [ 35.846863] do_syscall_64+0x3f/0x90 [ 35.847337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.847985] RIP: 0033:0x7f6d29914d82 [ 35.848438] 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 [ 35.850544] RSP: 002b:00007ffd36cd44b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.851441] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d29914d82 [ 35.852285] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d28d4e000 [ 35.853121] RBP: 00007f6d28d4e000 R08: 0000000000000009 R09: 0000000000001000 [ 35.853957] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f9b995f70 [ 35.854818] R13: 00007ffd36cd44d0 R14: 00007ffd36cd4500 R15: 00007ffd36cd4860 [ 35.855664] [ 35.855954] [ 35.856170] Allocated by task 213: [ 35.856591] kasan_save_stack+0x22/0x50 [ 35.857095] kasan_set_track+0x25/0x30 [ 35.857579] __kasan_slab_alloc+0x59/0x70 [ 35.858095] kmem_cache_alloc+0x16b/0x370 [ 35.858612] vm_area_dup+0x20/0x160 [ 35.859097] __split_vma+0x170/0x950 [ 35.859574] split_vma+0xc6/0x110 [ 35.860020] mprotect_fixup+0x8d2/0xb30 [ 35.860522] do_mprotect_pkey+0x87e/0xd40 [ 35.861051] __x64_sys_mprotect+0x78/0xc0 [ 35.861565] do_syscall_64+0x3f/0x90 [ 35.862040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.862710] [ 35.862930] Freed by task 213: [ 35.863333] kasan_save_stack+0x22/0x50 [ 35.863835] kasan_set_track+0x25/0x30 [ 35.864326] kasan_save_free_info+0x2b/0x50 [ 35.864860] __kasan_slab_free+0x10a/0x190 [ 35.865394] kmem_cache_free+0x10d/0x4d0 [ 35.865899] rcu_core+0x8c8/0x2860 [ 35.866348] __do_softirq+0x1b7/0x7d4 [ 35.866831] [ 35.867043] Last potentially related work creation: [ 35.867626] kasan_save_stack+0x22/0x50 [ 35.868124] __kasan_record_aux_stack+0x8e/0xa0 [ 35.868700] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.869352] remove_vma+0x139/0x170 [ 35.869805] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.870359] do_vmi_munmap+0x1f1/0x2b0 [ 35.870846] __vm_munmap+0x138/0x3a0 [ 35.871310] __x64_sys_munmap+0x59/0x80 [ 35.871801] do_syscall_64+0x3f/0x90 [ 35.872277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.872922] [ 35.873136] Second to last potentially related work creation: [ 35.873818] kasan_save_stack+0x22/0x50 [ 35.874320] __kasan_record_aux_stack+0x8e/0xa0 [ 35.874905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.875550] remove_vma+0x139/0x170 [ 35.876005] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.876558] do_vmi_munmap+0x1f1/0x2b0 [ 35.877047] mmap_region+0x1f9/0x2660 [ 35.877526] do_mmap+0x854/0xf00 [ 35.877955] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.878449] ksys_mmap_pgoff+0x7d/0x500 [ 35.878948] do_syscall_64+0x3f/0x90 [ 35.879420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.880057] [ 35.880273] The buggy address belongs to the object at ffff88800e6db740 [ 35.880273] which belongs to the cache vm_area_struct of size 168 [ 35.881737] The buggy address is located 88 bytes inside of [ 35.881737] freed 168-byte region [ffff88800e6db740, ffff88800e6db7e8) [ 35.883138] [ 35.883351] The buggy address belongs to the physical page: [ 35.884005] page:00000000ddf719d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6db [ 35.885084] memcg:ffff888014418801 [ 35.885508] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.886202] page_type: 0xffffffff() [ 35.886665] raw: 0100000000000200 ffff88800879fc80 ffffea000037c540 dead000000000003 [ 35.887579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014418801 [ 35.888485] page dumped because: kasan: bad access detected [ 35.889146] [ 35.889364] Memory state around the buggy address: [ 35.889941] ffff88800e6db680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.890800] ffff88800e6db700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.891652] >ffff88800e6db780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.892501] ^ [ 35.892996] ffff88800e6db800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.893850] ffff88800e6db880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.894705] ================================================================== [ 35.895731] Disabling lock debugging due to kernel taint [ 38.062031] BUG: Bad rss-counter state mm:00000000c5a48a96 type:MM_FILEPAGES val:33 [ 38.063504] BUG: Bad rss-counter state mm:00000000c5a48a96 type:MM_ANONPAGES val:22 [ 38.639742] BUG: Bad rss-counter state mm:000000004a3acf7c type:MM_FILEPAGES val:33 [ 38.640948] BUG: Bad rss-counter state mm:000000004a3acf7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42906' (ECDSA) to the list of known hosts. 2023/06/20 03:49:37 fuzzer started 2023/06/20 03:49:37 dialing manager at localhost:44161 2023/06/20 03:49:37 checking machine... 2023/06/20 03:49:37 checking revisions... [ 39.295251] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:49:37 testing simple program... [ 39.346408] cgroup: Unknown subsys name 'net' [ 39.384901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=00000000000361a0 RSP=ffff88801452f680 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=ffff888018222000 R14=00000000000361a0 R15=ffff888018222000 RIP=ffffffff81835341 RFL=00000046 [---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 00007f12b689a900 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=00007f12b6e4f650 CR3=000000000c4e0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffc0b5d4708 CR3=000000001a092000 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=2037333a39343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a39343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000