syzkaller login: [ 40.732896] BUG: Bad rss-counter state mm:00000000775e2073 type:MM_FILEPAGES val:33 [ 40.734070] BUG: Bad rss-counter state mm:00000000775e2073 type:MM_ANONPAGES val:22 [ 40.774701] ================================================================== [ 40.775664] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.776598] Read of size 8 at addr ffff88800da71ed8 by task sshd/219 [ 40.777352] [ 40.777568] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.778425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.779408] Call Trace: [ 40.779726] [ 40.780011] dump_stack_lvl+0x91/0xf0 [ 40.780500] print_report+0xcc/0x620 [ 40.780984] ? __virt_addr_valid+0x102/0x340 [ 40.781535] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.782151] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.782772] kasan_report+0xbe/0xf0 [ 40.783244] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.783857] vma_interval_tree_remove+0xc75/0xec0 [ 40.784471] vma_prepare+0xc54/0x11a0 [ 40.784951] __split_vma+0x5af/0x950 [ 40.785419] ? __pfx___split_vma+0x10/0x10 [ 40.785945] ? find_held_lock+0x2c/0x110 [ 40.786542] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.787246] ? lock_is_held_type+0x9f/0x120 [ 40.787906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.788641] ? mtree_range_walk+0x632/0x900 [ 40.789316] ? mas_walk+0x5c7/0x7c0 [ 40.789892] do_vmi_munmap+0x1f1/0x2b0 [ 40.790490] mmap_region+0x1f9/0x2660 [ 40.791084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.791717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.792615] ? __pfx_lock_acquire+0x10/0x10 [ 40.793271] ? __pfx_mmap_region+0x10/0x10 [ 40.793921] ? security_mmap_addr+0x7d/0xa0 [ 40.794575] ? get_unmapped_area+0x1f5/0x3f0 [ 40.795236] do_mmap+0x854/0xf00 [ 40.795754] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.796350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.797025] ksys_mmap_pgoff+0x3af/0x500 [ 40.797629] do_syscall_64+0x3f/0x90 [ 40.798198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.798983] RIP: 0033:0x7fca0502ed82 [ 40.799535] 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 [ 40.802107] RSP: 002b:00007fffad9d35a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.803091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca0502ed82 [ 40.803925] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca04468000 [ 40.804724] RBP: 00007fca04468000 R08: 0000000000000009 R09: 0000000000001000 [ 40.805517] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557865c87b20 [ 40.806313] R13: 00007fffad9d35c0 R14: 00007fffad9d35f0 R15: 00007fffad9d3950 [ 40.807140] [ 40.807417] [ 40.807622] Allocated by task 212: [ 40.808034] kasan_save_stack+0x22/0x50 [ 40.808515] kasan_set_track+0x25/0x30 [ 40.808979] __kasan_slab_alloc+0x59/0x70 [ 40.809482] kmem_cache_alloc+0x16b/0x370 [ 40.809973] vm_area_dup+0x20/0x160 [ 40.810412] __split_vma+0x170/0x950 [ 40.810858] split_vma+0xc6/0x110 [ 40.811281] mprotect_fixup+0x8d2/0xb30 [ 40.811759] do_mprotect_pkey+0x87e/0xd40 [ 40.812264] __x64_sys_mprotect+0x78/0xc0 [ 40.812788] do_syscall_64+0x3f/0x90 [ 40.813267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.813898] [ 40.814118] Freed by task 19: [ 40.814498] kasan_save_stack+0x22/0x50 [ 40.814995] kasan_set_track+0x25/0x30 [ 40.815482] kasan_save_free_info+0x2b/0x50 [ 40.816017] __kasan_slab_free+0x10a/0x190 [ 40.816545] kmem_cache_free+0x10d/0x4d0 [ 40.817047] rcu_core+0x8c8/0x2860 [ 40.817485] __do_softirq+0x1b7/0x7d4 [ 40.817951] [ 40.818166] Last potentially related work creation: [ 40.818748] kasan_save_stack+0x22/0x50 [ 40.819263] __kasan_record_aux_stack+0x8e/0xa0 [ 40.819834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.820465] remove_vma+0x139/0x170 [ 40.820909] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.821456] do_vmi_munmap+0x1f1/0x2b0 [ 40.821940] __vm_munmap+0x138/0x3a0 [ 40.822406] __x64_sys_munmap+0x59/0x80 [ 40.822908] do_syscall_64+0x3f/0x90 [ 40.823377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.824006] [ 40.824219] The buggy address belongs to the object at ffff88800da71e80 [ 40.824219] which belongs to the cache vm_area_struct of size 168 [ 40.825665] The buggy address is located 88 bytes inside of [ 40.825665] freed 168-byte region [ffff88800da71e80, ffff88800da71f28) [ 40.827039] [ 40.827251] The buggy address belongs to the physical page: [ 40.827896] page:0000000014816f2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda71 [ 40.828967] memcg:ffff888013f63701 [ 40.829382] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.830070] page_type: 0xffffffff() [ 40.830514] raw: 0100000000000200 ffff88800879fc80 ffffea000037ebc0 dead000000000007 [ 40.831445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f63701 [ 40.832341] page dumped because: kasan: bad access detected [ 40.832989] [ 40.833199] Memory state around the buggy address: [ 40.833771] ffff88800da71d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.834605] ffff88800da71e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.835459] >ffff88800da71e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.836306] ^ [ 40.837025] ffff88800da71f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.837868] ffff88800da71f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.838713] ================================================================== [ 40.840056] Disabling lock debugging due to kernel taint [ 42.734610] BUG: Bad rss-counter state mm:00000000ec7edbf4 type:MM_FILEPAGES val:33 [ 42.735950] BUG: Bad rss-counter state mm:00000000ec7edbf4 type:MM_ANONPAGES val:22 [ 43.195224] BUG: Bad rss-counter state mm:00000000575991ef type:MM_FILEPAGES val:33 [ 43.196187] BUG: Bad rss-counter state mm:00000000575991ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31608' (ECDSA) to the list of known hosts. 2023/06/20 04:17:29 fuzzer started 2023/06/20 04:17:30 dialing manager at localhost:44161 2023/06/20 04:17:30 checking machine... 2023/06/20 04:17:30 checking revisions... [ 43.781139] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:17:30 testing simple program... [ 43.827171] cgroup: Unknown subsys name 'net' [ 43.884233] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:17:17 Registers: info registers vcpu 0 RAX=00000000f7c5e599 RBX=0000000071f6a98c RCX=ffff88801b45f71c RDX=000000000000000e RSI=000000000000000d RDI=000000004c15ded9 RBP=ffffffff8366dfdf RSP=ffff88801b45f678 R8 =00000000ffffffff R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88801b45f6e0 R15=000000000000000e RIP=ffffffff82270e87 RFL=00000213 [----A-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9f27495900 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=00007f9f27a4c618 CR3=000000000e83e000 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=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 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=00007f49133cd0a0 CR3=000000000dd24000 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=5844d1172d6c1085984a6401aac969fe XMM02=000000000011c128ec2efd57dc4c00df XMM03=00000000001230f88159d5216243dc76 XMM04=810f79ab95720d9f00000000000ae988 XMM05=19e9129bd510f2350000000000132b28 XMM06=f1d80d6efe50d95c0000000000131990 XMM07=e042d86d42eb936e00000000001233d0 XMM08=8159d5216243dc76000000000011c188 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000