syzkaller login: [ 36.370670] BUG: Bad rss-counter state mm:000000009d2bf500 type:MM_FILEPAGES val:33 [ 36.371661] BUG: Bad rss-counter state mm:000000009d2bf500 type:MM_ANONPAGES val:22 [ 36.543789] ================================================================== [ 36.544888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.545987] Read of size 8 at addr ffff88800e68fc20 by task sshd/220 [ 36.547009] [ 36.547229] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.548073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.549035] Call Trace: [ 36.549352] [ 36.549635] dump_stack_lvl+0x91/0xf0 [ 36.550122] print_report+0xcc/0x620 [ 36.550610] ? __virt_addr_valid+0x102/0x340 [ 36.551161] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.551774] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.552378] kasan_report+0xbe/0xf0 [ 36.552853] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.553470] vma_interval_tree_remove+0xc75/0xec0 [ 36.554074] vma_prepare+0xc54/0x11a0 [ 36.554571] __split_vma+0x5af/0x950 [ 36.555044] ? __pfx___split_vma+0x10/0x10 [ 36.555562] ? find_held_lock+0x2c/0x110 [ 36.556083] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.556647] ? lock_is_held_type+0x9f/0x120 [ 36.557186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.557786] ? mtree_range_walk+0x632/0x900 [ 36.558340] ? mas_walk+0x5c7/0x7c0 [ 36.558820] do_vmi_munmap+0x1f1/0x2b0 [ 36.559312] mmap_region+0x1f9/0x2660 [ 36.559792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.560305] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.561010] ? __pfx_lock_acquire+0x10/0x10 [ 36.561539] ? __pfx_mmap_region+0x10/0x10 [ 36.562062] ? security_mmap_addr+0x7d/0xa0 [ 36.562600] ? get_unmapped_area+0x1f5/0x3f0 [ 36.563141] do_mmap+0x854/0xf00 [ 36.563572] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.564060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.564614] ksys_mmap_pgoff+0x3af/0x500 [ 36.565119] do_syscall_64+0x3f/0x90 [ 36.565597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.566239] RIP: 0033:0x7f69567fbd82 [ 36.566697] 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 [ 36.568798] RSP: 002b:00007fffb39a9e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.569695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69567fbd82 [ 36.570552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6955c35000 [ 36.571398] RBP: 00007f6955c35000 R08: 0000000000000009 R09: 0000000000001000 [ 36.572237] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c5984bec0 [ 36.573086] R13: 00007fffb39a9e80 R14: 00007fffb39a9eb0 R15: 00007fffb39aa210 [ 36.573940] [ 36.574230] [ 36.574465] Allocated by task 213: [ 36.574890] kasan_save_stack+0x22/0x50 [ 36.575397] kasan_set_track+0x25/0x30 [ 36.575891] __kasan_slab_alloc+0x59/0x70 [ 36.576414] kmem_cache_alloc+0x16b/0x370 [ 36.576930] vm_area_dup+0x20/0x160 [ 36.577384] __split_vma+0x170/0x950 [ 36.577844] split_vma+0xc6/0x110 [ 36.578279] mprotect_fixup+0x8d2/0xb30 [ 36.578783] do_mprotect_pkey+0x87e/0xd40 [ 36.579303] __x64_sys_mprotect+0x78/0xc0 [ 36.579818] do_syscall_64+0x3f/0x90 [ 36.580288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.580924] [ 36.581136] Freed by task 213: [ 36.581529] kasan_save_stack+0x22/0x50 [ 36.582031] kasan_set_track+0x25/0x30 [ 36.582540] kasan_save_free_info+0x2b/0x50 [ 36.583072] __kasan_slab_free+0x10a/0x190 [ 36.583597] kmem_cache_free+0x10d/0x4d0 [ 36.584104] rcu_core+0x8c8/0x2860 [ 36.584541] __do_softirq+0x1b7/0x7d4 [ 36.585017] [ 36.585230] Last potentially related work creation: [ 36.585808] kasan_save_stack+0x22/0x50 [ 36.586306] __kasan_record_aux_stack+0x8e/0xa0 [ 36.586876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.587574] remove_vma+0x139/0x170 [ 36.588028] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.588574] do_vmi_munmap+0x1f1/0x2b0 [ 36.589053] __vm_munmap+0x138/0x3a0 [ 36.589515] __x64_sys_munmap+0x59/0x80 [ 36.590014] do_syscall_64+0x3f/0x90 [ 36.590509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.591142] [ 36.591354] Second to last potentially related work creation: [ 36.592032] kasan_save_stack+0x22/0x50 [ 36.592531] __kasan_record_aux_stack+0x8e/0xa0 [ 36.593094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.593733] remove_vma+0x139/0x170 [ 36.594178] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.594738] do_vmi_munmap+0x1f1/0x2b0 [ 36.595217] mmap_region+0x1f9/0x2660 [ 36.595695] do_mmap+0x854/0xf00 [ 36.596119] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.596602] ksys_mmap_pgoff+0x3af/0x500 [ 36.597094] do_syscall_64+0x3f/0x90 [ 36.597566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.598198] [ 36.598410] The buggy address belongs to the object at ffff88800e68fbc8 [ 36.598410] which belongs to the cache vm_area_struct of size 168 [ 36.599880] The buggy address is located 88 bytes inside of [ 36.599880] freed 168-byte region [ffff88800e68fbc8, ffff88800e68fc70) [ 36.601263] [ 36.601477] The buggy address belongs to the physical page: [ 36.602133] page:00000000a92f1902 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e68fae0 pfn:0xe68f [ 36.603351] memcg:ffff8880167ef801 [ 36.603772] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.604407] page_type: 0xffffffff() [ 36.604860] raw: 0100000000000200 ffff8880087a0c80 ffffea0000595ac0 dead000000000002 [ 36.605778] raw: ffff88800e68fae0 000000008011000b 00000001ffffffff ffff8880167ef801 [ 36.606681] page dumped because: kasan: bad access detected [ 36.607329] [ 36.607542] Memory state around the buggy address: [ 36.608111] ffff88800e68fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.608959] ffff88800e68fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.609802] >ffff88800e68fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.610658] ^ [ 36.611183] ffff88800e68fc80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb [ 36.612026] ffff88800e68fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.612876] ================================================================== [ 36.613791] Disabling lock debugging due to kernel taint [ 38.624252] BUG: Bad rss-counter state mm:00000000469ecf4d type:MM_FILEPAGES val:33 [ 38.625227] BUG: Bad rss-counter state mm:00000000469ecf4d type:MM_ANONPAGES val:22 [ 39.128794] BUG: Bad rss-counter state mm:00000000f70a9395 type:MM_FILEPAGES val:33 [ 39.129771] BUG: Bad rss-counter state mm:00000000f70a9395 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55077' (ECDSA) to the list of known hosts. 2023/06/21 04:36:01 fuzzer started 2023/06/21 04:36:02 dialing manager at localhost:36067 2023/06/21 04:36:02 checking machine... 2023/06/21 04:36:02 checking revisions... [ 39.811085] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:36:02 testing simple program... [ 39.849916] cgroup: Unknown subsys name 'net' [ 39.890668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f97640 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800fe0e488 RBP=ffff88800fe0e274 RSP=ffff888016887d48 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800fe0e000 R13=ffffffff87f9778c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff81452134 RFL=00000286 [--S--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 00007f4979c70900 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=00007f5687049580 CR3=000000000d900000 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=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=00007f497a2280b0 CR3=0000000018e1e000 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=2031303a36333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36333a3430203132 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000