syzkaller login: [ 47.020027] BUG: Bad rss-counter state mm:000000005aff1f77 type:MM_FILEPAGES val:33 [ 47.021444] BUG: Bad rss-counter state mm:000000005aff1f77 type:MM_ANONPAGES val:22 [ 47.177797] ================================================================== [ 47.178748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.179690] Read of size 8 at addr ffff888019aa36b0 by task sshd/219 [ 47.180537] [ 47.180774] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.181653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.182673] Call Trace: [ 47.183007] [ 47.183290] dump_stack_lvl+0x91/0xf0 [ 47.183783] print_report+0xcc/0x620 [ 47.184277] ? __virt_addr_valid+0x102/0x340 [ 47.184845] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.185475] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.186114] kasan_report+0xbe/0xf0 [ 47.186602] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.187224] vma_interval_tree_remove+0xc75/0xec0 [ 47.187844] vma_prepare+0xc54/0x11a0 [ 47.188327] __split_vma+0x5af/0x950 [ 47.188800] ? __pfx___split_vma+0x10/0x10 [ 47.189346] ? find_held_lock+0x2c/0x110 [ 47.189884] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.190465] ? lock_is_held_type+0x9f/0x120 [ 47.191009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.191616] ? mtree_range_walk+0x632/0x900 [ 47.192165] ? mas_walk+0x5c7/0x7c0 [ 47.192639] do_vmi_munmap+0x1f1/0x2b0 [ 47.193132] mmap_region+0x1f9/0x2660 [ 47.193614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.194145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.194860] ? __pfx_lock_acquire+0x10/0x10 [ 47.195398] ? __pfx_mmap_region+0x10/0x10 [ 47.195934] ? security_mmap_addr+0x7d/0xa0 [ 47.196459] ? get_unmapped_area+0x1f5/0x3f0 [ 47.197014] do_mmap+0x854/0xf00 [ 47.197453] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.197946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.198518] ksys_mmap_pgoff+0x3af/0x500 [ 47.199031] do_syscall_64+0x3f/0x90 [ 47.199506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.200154] RIP: 0033:0x7fb425974d82 [ 47.200608] 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 [ 47.202744] RSP: 002b:00007ffe7cb3fa78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.203643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb425974d82 [ 47.204487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb424dae000 [ 47.205328] RBP: 00007fb424dae000 R08: 0000000000000009 R09: 0000000000001000 [ 47.206175] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4c0e0aec0 [ 47.207024] R13: 00007ffe7cb3fa90 R14: 00007ffe7cb3fac0 R15: 00007ffe7cb3fe20 [ 47.207882] [ 47.208175] [ 47.208390] Allocated by task 212: [ 47.208819] kasan_save_stack+0x22/0x50 [ 47.209324] kasan_set_track+0x25/0x30 [ 47.209819] __kasan_slab_alloc+0x59/0x70 [ 47.210350] kmem_cache_alloc+0x16b/0x370 [ 47.210875] vm_area_dup+0x20/0x160 [ 47.211335] __split_vma+0x170/0x950 [ 47.211805] split_vma+0xc6/0x110 [ 47.212242] mprotect_fixup+0x8d2/0xb30 [ 47.212747] do_mprotect_pkey+0x87e/0xd40 [ 47.213272] __x64_sys_mprotect+0x78/0xc0 [ 47.213793] do_syscall_64+0x3f/0x90 [ 47.214292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.214930] [ 47.215146] Freed by task 212: [ 47.215538] kasan_save_stack+0x22/0x50 [ 47.216038] kasan_set_track+0x25/0x30 [ 47.216528] kasan_save_free_info+0x2b/0x50 [ 47.217059] __kasan_slab_free+0x10a/0x190 [ 47.217590] kmem_cache_free+0x10d/0x4d0 [ 47.218122] rcu_core+0x8c8/0x2860 [ 47.218563] __do_softirq+0x1b7/0x7d4 [ 47.219061] [ 47.219275] Last potentially related work creation: [ 47.219865] kasan_save_stack+0x22/0x50 [ 47.220368] __kasan_record_aux_stack+0x8e/0xa0 [ 47.220943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.221583] remove_vma+0x139/0x170 [ 47.222065] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.222619] do_vmi_munmap+0x1f1/0x2b0 [ 47.223108] __vm_munmap+0x138/0x3a0 [ 47.223595] __x64_sys_munmap+0x59/0x80 [ 47.224106] do_syscall_64+0x3f/0x90 [ 47.224590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.225245] [ 47.225461] The buggy address belongs to the object at ffff888019aa3658 [ 47.225461] which belongs to the cache vm_area_struct of size 168 [ 47.227192] The buggy address is located 88 bytes inside of [ 47.227192] freed 168-byte region [ffff888019aa3658, ffff888019aa3700) [ 47.228650] [ 47.228937] The buggy address belongs to the physical page: [ 47.229717] page:000000007740dc45 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19aa3 [ 47.230940] memcg:ffff88800c982e01 [ 47.231488] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.232134] page_type: 0xffffffff() [ 47.232593] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.233737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c982e01 [ 47.234711] page dumped because: kasan: bad access detected [ 47.235542] [ 47.235762] Memory state around the buggy address: [ 47.236338] ffff888019aa3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.237196] ffff888019aa3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 47.238077] >ffff888019aa3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.239120] ^ [ 47.239708] ffff888019aa3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 47.240796] ffff888019aa3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 47.241913] ================================================================== [ 47.243084] Disabling lock debugging due to kernel taint [ 49.682619] BUG: Bad rss-counter state mm:0000000060ac740a type:MM_FILEPAGES val:33 [ 49.683784] BUG: Bad rss-counter state mm:0000000060ac740a type:MM_ANONPAGES val:22 [ 50.065843] BUG: Bad rss-counter state mm:0000000011585bef type:MM_FILEPAGES val:33 [ 50.067038] BUG: Bad rss-counter state mm:0000000011585bef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16197' (ECDSA) to the list of known hosts. 2023/06/20 06:17:40 fuzzer started 2023/06/20 06:17:40 dialing manager at localhost:44161 2023/06/20 06:17:40 checking machine... 2023/06/20 06:17:40 checking revisions... [ 50.759253] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:17:40 testing simple program... [ 50.815150] cgroup: Unknown subsys name 'net' [ 50.850359] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed1002854ea8 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff8880142a7530 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856c1d40 R15=0000000000000000 RIP=ffffffff812d8fe9 RFL=00000282 [--S----] 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 00007f24224c0900 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=00007fd34262e650 CR3=000000000d9a6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7151abfba125290b00000000000ae988 XMM05=f461fb414369ce8e0000000000134fd0 XMM06=dfcdbad4f1609c370000000000133e88 XMM07=fb795ef6d65770560000000000124330 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000c RBX=0000000000000400 RCX=0000000000000400 RDX=0000563b6f2a4770 RSI=0000563b6f2a4740 RDI=0000563b6f293ce0 RBP=0000000000000400 RSP=fffffe0000049fd0 R8 =00007ffce923eaa8 R9 =00007fd34262bbe0 R10=000000000000006e R11=0000000000000000 R12=0000563b6f2a4740 R13=0000563b6f293ce0 R14=0000563b6f2a4770 R15=00007ffce923eaa8 RIP=ffffffff84601260 RFL=00000083 [--S---C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd342079900 00000000 00000000 GS =0000 0000000000000000 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=00007fd3426310b0 CR3=000000000e858000 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=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