syzkaller login: [ 33.648778] BUG: Bad rss-counter state mm:00000000579a4e07 type:MM_FILEPAGES val:33 [ 33.649692] BUG: Bad rss-counter state mm:00000000579a4e07 type:MM_ANONPAGES val:22 [ 33.743718] ================================================================== [ 33.744421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.745072] Read of size 8 at addr ffff88801a159880 by task sshd/219 [ 33.745560] [ 33.745696] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.746334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.747035] Call Trace: [ 33.747258] [ 33.747445] dump_stack_lvl+0x91/0xf0 [ 33.747999] print_report+0xcc/0x620 [ 33.748335] ? __virt_addr_valid+0x102/0x340 [ 33.748699] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.749145] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.749542] kasan_report+0xbe/0xf0 [ 33.749843] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.750341] vma_interval_tree_remove+0xc75/0xec0 [ 33.750726] vma_prepare+0xc54/0x11a0 [ 33.751039] __split_vma+0x5af/0x950 [ 33.751341] ? __pfx___split_vma+0x10/0x10 [ 33.751691] ? find_held_lock+0x2c/0x110 [ 33.752045] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.752432] ? lock_is_held_type+0x9f/0x120 [ 33.752796] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.753208] ? mtree_range_walk+0x632/0x900 [ 33.753579] ? mas_walk+0x5c7/0x7c0 [ 33.753892] do_vmi_munmap+0x1f1/0x2b0 [ 33.754267] mmap_region+0x1f9/0x2660 [ 33.754582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.754919] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.755400] ? __pfx_lock_acquire+0x10/0x10 [ 33.755740] ? __pfx_mmap_region+0x10/0x10 [ 33.756073] ? security_mmap_addr+0x7d/0xa0 [ 33.756418] ? get_unmapped_area+0x1f5/0x3f0 [ 33.756762] do_mmap+0x854/0xf00 [ 33.757040] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.757365] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.757856] ksys_mmap_pgoff+0x3af/0x500 [ 33.758303] do_syscall_64+0x3f/0x90 [ 33.758657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.759129] RIP: 0033:0x7f3774cffd82 [ 33.759440] 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 [ 33.760938] RSP: 002b:00007ffec7796ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.761570] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3774cffd82 [ 33.762208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3774139000 [ 33.762789] RBP: 00007f3774139000 R08: 0000000000000009 R09: 0000000000001000 [ 33.763405] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bedde4ec0 [ 33.763994] R13: 00007ffec7796f10 R14: 00007ffec7796f40 R15: 00007ffec77972a0 [ 33.764549] [ 33.764744] [ 33.764895] Allocated by task 212: [ 33.765200] kasan_save_stack+0x22/0x50 [ 33.765577] kasan_set_track+0x25/0x30 [ 33.765921] __kasan_slab_alloc+0x59/0x70 [ 33.766345] kmem_cache_alloc+0x16b/0x370 [ 33.766703] vm_area_dup+0x20/0x160 [ 33.767023] __split_vma+0x170/0x950 [ 33.767366] split_vma+0xc6/0x110 [ 33.767693] mprotect_fixup+0x8d2/0xb30 [ 33.768053] do_mprotect_pkey+0x87e/0xd40 [ 33.768403] __x64_sys_mprotect+0x78/0xc0 [ 33.768767] do_syscall_64+0x3f/0x90 [ 33.769134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.769631] [ 33.769778] Freed by task 212: [ 33.770085] kasan_save_stack+0x22/0x50 [ 33.770480] kasan_set_track+0x25/0x30 [ 33.770822] kasan_save_free_info+0x2b/0x50 [ 33.771228] __kasan_slab_free+0x10a/0x190 [ 33.771632] kmem_cache_free+0x10d/0x4d0 [ 33.772020] rcu_core+0x8c8/0x2860 [ 33.772323] __do_softirq+0x1b7/0x7d4 [ 33.772643] [ 33.772801] Last potentially related work creation: [ 33.773243] kasan_save_stack+0x22/0x50 [ 33.773605] __kasan_record_aux_stack+0x8e/0xa0 [ 33.774012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.774544] remove_vma+0x139/0x170 [ 33.774858] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.775265] do_vmi_munmap+0x1f1/0x2b0 [ 33.775618] __vm_munmap+0x138/0x3a0 [ 33.775942] __x64_sys_munmap+0x59/0x80 [ 33.776314] do_syscall_64+0x3f/0x90 [ 33.776628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.777098] [ 33.777260] The buggy address belongs to the object at ffff88801a159828 [ 33.777260] which belongs to the cache vm_area_struct of size 168 [ 33.778330] The buggy address is located 88 bytes inside of [ 33.778330] freed 168-byte region [ffff88801a159828, ffff88801a1598d0) [ 33.779326] [ 33.779480] The buggy address belongs to the physical page: [ 33.779960] page:000000002ecbf371 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a159 [ 33.780716] memcg:ffff88800db44701 [ 33.781048] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.781523] page_type: 0xffffffff() [ 33.781847] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.782540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db44701 [ 33.783219] page dumped because: kasan: bad access detected [ 33.783658] [ 33.783814] Memory state around the buggy address: [ 33.784246] ffff88801a159780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.784847] ffff88801a159800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.785444] >ffff88801a159880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.786025] ^ [ 33.786385] ffff88801a159900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.786940] ffff88801a159980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.787496] ================================================================== [ 33.788152] Disabling lock debugging due to kernel taint [ 35.313753] BUG: Bad rss-counter state mm:000000004d546850 type:MM_FILEPAGES val:33 [ 35.314472] BUG: Bad rss-counter state mm:000000004d546850 type:MM_ANONPAGES val:22 [ 35.607442] BUG: Bad rss-counter state mm:00000000efcacbc4 type:MM_FILEPAGES val:33 [ 35.608137] BUG: Bad rss-counter state mm:00000000efcacbc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53048' (ECDSA) to the list of known hosts. 2023/06/20 09:49:13 fuzzer started 2023/06/20 09:49:13 dialing manager at localhost:44161 2023/06/20 09:49:13 checking machine... 2023/06/20 09:49:13 checking revisions... [ 36.187780] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:49:14 testing simple program... [ 36.220684] cgroup: Unknown subsys name 'net' [ 36.256642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff818061eb RSP=ffff888016fcfbc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88800844f780 R13=ffffea000068cc40 R14=ffff88800844f780 R15=0000000000000001 RIP=ffffffff8135b905 RFL=00000086 [--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 00007f5cc1365900 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=00007f5cc191a650 CR3=000000000d892000 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=00007f7353b08a70 CR3=000000000c878000 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=c89626152f2fb2a390404fd400a7fe02 XMM02=000000000011c628d59e07bde36eea69 XMM03=000000000011c750ec2efd57dc4c00df XMM04=b07dd47aa65129ff00000000000ae988 XMM05=78ed967b7f3ced1f0000000000134870 XMM06=806171799158d9670000000000133660 XMM07=fb795ef6d65770560000000000123c90 XMM08=2c67c8bc2e329bc3000000000011c750 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000