syzkaller login: [ 31.047359] BUG: Bad rss-counter state mm:0000000061779581 type:MM_FILEPAGES val:33 [ 31.049165] BUG: Bad rss-counter state mm:0000000061779581 type:MM_ANONPAGES val:22 [ 31.235524] ================================================================== [ 31.236709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237801] Read of size 8 at addr ffff88800d8aedf0 by task sshd/220 [ 31.238613] [ 31.238838] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.240854] Call Trace: [ 31.241206] [ 31.241525] dump_stack_lvl+0x91/0xf0 [ 31.242059] print_report+0xcc/0x620 [ 31.242609] ? __virt_addr_valid+0x102/0x340 [ 31.243190] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244484] kasan_report+0xbe/0xf0 [ 31.244986] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.245656] vma_interval_tree_remove+0xc75/0xec0 [ 31.246287] vma_prepare+0xc54/0x11a0 [ 31.246789] __split_vma+0x5af/0x950 [ 31.247298] ? __pfx___split_vma+0x10/0x10 [ 31.247851] ? find_held_lock+0x2c/0x110 [ 31.248407] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.249000] ? lock_is_held_type+0x9f/0x120 [ 31.249576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.250201] ? mtree_range_walk+0x632/0x900 [ 31.250782] ? mas_walk+0x5c7/0x7c0 [ 31.251277] do_vmi_munmap+0x1f1/0x2b0 [ 31.251890] mmap_region+0x1f9/0x2660 [ 31.252532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.253203] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.254178] ? __pfx_lock_acquire+0x10/0x10 [ 31.254925] ? __pfx_mmap_region+0x10/0x10 [ 31.255658] ? security_mmap_addr+0x7d/0xa0 [ 31.256371] ? get_unmapped_area+0x1f5/0x3f0 [ 31.257136] do_mmap+0x854/0xf00 [ 31.257768] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.258465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.259259] ksys_mmap_pgoff+0x3af/0x500 [ 31.259993] do_syscall_64+0x3f/0x90 [ 31.260656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261574] RIP: 0033:0x7f93149f6d82 [ 31.262199] 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 [ 31.264729] RSP: 002b:00007ffc711da7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.265854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93149f6d82 [ 31.266722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9313e30000 [ 31.267592] RBP: 00007f9313e30000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268501] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5a8634ec0 [ 31.269403] R13: 00007ffc711da7c0 R14: 00007ffc711da7f0 R15: 00007ffc711dab50 [ 31.270419] [ 31.270786] [ 31.271021] Allocated by task 213: [ 31.271467] kasan_save_stack+0x22/0x50 [ 31.271999] kasan_set_track+0x25/0x30 [ 31.272518] __kasan_slab_alloc+0x59/0x70 [ 31.273076] kmem_cache_alloc+0x16b/0x370 [ 31.273634] vm_area_dup+0x20/0x160 [ 31.274115] __split_vma+0x170/0x950 [ 31.274600] split_vma+0xc6/0x110 [ 31.275071] mprotect_fixup+0x8d2/0xb30 [ 31.275596] do_mprotect_pkey+0x87e/0xd40 [ 31.276157] __x64_sys_mprotect+0x78/0xc0 [ 31.276698] do_syscall_64+0x3f/0x90 [ 31.277208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277946] [ 31.278180] Freed by task 13: [ 31.278581] kasan_save_stack+0x22/0x50 [ 31.279116] kasan_set_track+0x25/0x30 [ 31.279635] kasan_save_free_info+0x2b/0x50 [ 31.280233] __kasan_slab_free+0x10a/0x190 [ 31.280770] kmem_cache_free+0x10d/0x4d0 [ 31.281304] rcu_core+0x8c8/0x2860 [ 31.281768] __do_softirq+0x1b7/0x7d4 [ 31.282273] [ 31.282487] Last potentially related work creation: [ 31.283077] kasan_save_stack+0x22/0x50 [ 31.283605] __kasan_record_aux_stack+0x8e/0xa0 [ 31.284227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.284894] remove_vma+0x139/0x170 [ 31.285398] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.285980] do_vmi_munmap+0x1f1/0x2b0 [ 31.286529] __vm_munmap+0x138/0x3a0 [ 31.287060] __x64_sys_munmap+0x59/0x80 [ 31.287583] do_syscall_64+0x3f/0x90 [ 31.288063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288717] [ 31.288934] Second to last potentially related work creation: [ 31.289676] kasan_save_stack+0x22/0x50 [ 31.290223] __kasan_record_aux_stack+0x8e/0xa0 [ 31.290823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291507] remove_vma+0x139/0x170 [ 31.291982] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.292531] do_vmi_munmap+0x1f1/0x2b0 [ 31.293009] mmap_region+0x1f9/0x2660 [ 31.293503] do_mmap+0x854/0xf00 [ 31.293939] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.294423] ksys_mmap_pgoff+0x3af/0x500 [ 31.294944] do_syscall_64+0x3f/0x90 [ 31.295456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296114] [ 31.296332] The buggy address belongs to the object at ffff88800d8aed98 [ 31.296332] which belongs to the cache vm_area_struct of size 168 [ 31.297835] The buggy address is located 88 bytes inside of [ 31.297835] freed 168-byte region [ffff88800d8aed98, ffff88800d8aee40) [ 31.299321] [ 31.299536] The buggy address belongs to the physical page: [ 31.300194] page:00000000d30ae23c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8ae [ 31.301297] memcg:ffff88800d8bd001 [ 31.301725] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.302375] page_type: 0xffffffff() [ 31.302831] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392800 dead000000000004 [ 31.303797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8bd001 [ 31.304704] page dumped because: kasan: bad access detected [ 31.305366] [ 31.305578] Memory state around the buggy address: [ 31.306154] ffff88800d8aec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.307031] ffff88800d8aed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.307897] >ffff88800d8aed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.308743] ^ [ 31.309570] ffff88800d8aee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.310430] ffff88800d8aee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.311305] ================================================================== [ 31.312334] Disabling lock debugging due to kernel taint [ 33.128046] BUG: Bad rss-counter state mm:00000000e2518407 type:MM_FILEPAGES val:33 [ 33.128749] BUG: Bad rss-counter state mm:00000000e2518407 type:MM_ANONPAGES val:22 [ 33.652926] BUG: Bad rss-counter state mm:000000002ab2afdc type:MM_FILEPAGES val:33 [ 33.654182] BUG: Bad rss-counter state mm:000000002ab2afdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65198' (ECDSA) to the list of known hosts. 2023/06/20 16:57:36 fuzzer started 2023/06/20 16:57:36 dialing manager at localhost:36067 2023/06/20 16:57:36 checking machine... 2023/06/20 16:57:36 checking revisions... [ 34.308904] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:57:36 testing simple program... [ 34.348964] cgroup: Unknown subsys name 'net' [ 34.389197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:36 Registers: info registers vcpu 0 RAX=ffffffff863b2e4b RBX=0000000000000001 RCX=ffffffff863b2e46 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888016067540 RSP=ffff888016067478 R8 =ffffffff863b2e4a R9 =ffff888016067528 R10=0000000000038001 R11=000000000008a835 R12=ffff888016067548 R13=ffff888016067530 R14=ffff888016067529 R15=ffff8880160674e8 RIP=ffffffff81130abf RFL=00000246 [---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 00007fc3ded8b700 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=00007ffd221a0628 CR3=000000000e366000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035333a3735 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88801813f838 RSI=ffff88801813f800 RDI=ffff88806cf09a50 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008b5b9 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff8880160d3680 R15=ffff88800d8d4d80 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007f84bf630900 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=00007f84bfbe7618 CR3=0000000015e9c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000