syzkaller login: [ 31.118144] BUG: Bad rss-counter state mm:000000003ab91c5d type:MM_FILEPAGES val:33 [ 31.119448] BUG: Bad rss-counter state mm:000000003ab91c5d type:MM_ANONPAGES val:22 [ 31.254930] ================================================================== [ 31.255775] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.256657] Read of size 8 at addr ffff888008f25310 by task sshd/221 [ 31.257374] [ 31.257584] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.258500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.259421] Call Trace: [ 31.259725] <TASK> [ 31.259993] dump_stack_lvl+0x91/0xf0 [ 31.260477] print_report+0xcc/0x620 [ 31.260934] ? __virt_addr_valid+0x102/0x340 [ 31.261452] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262665] kasan_report+0xbe/0xf0 [ 31.263154] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263754] vma_interval_tree_remove+0xc75/0xec0 [ 31.264357] vma_prepare+0xc54/0x11a0 [ 31.264847] __split_vma+0x5af/0x950 [ 31.265334] ? __pfx___split_vma+0x10/0x10 [ 31.265852] ? find_held_lock+0x2c/0x110 [ 31.266374] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.266938] ? lock_is_held_type+0x9f/0x120 [ 31.267450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.268025] ? mtree_range_walk+0x632/0x900 [ 31.268546] ? mas_walk+0x5c7/0x7c0 [ 31.269001] do_vmi_munmap+0x1f1/0x2b0 [ 31.269471] mmap_region+0x1f9/0x2660 [ 31.269931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.270418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.271102] ? __pfx_lock_acquire+0x10/0x10 [ 31.271708] ? __pfx_mmap_region+0x10/0x10 [ 31.272327] ? security_mmap_addr+0x7d/0xa0 [ 31.272943] ? get_unmapped_area+0x1f5/0x3f0 [ 31.273577] do_mmap+0x854/0xf00 [ 31.274084] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.274665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.275352] ksys_mmap_pgoff+0x3af/0x500 [ 31.275946] do_syscall_64+0x3f/0x90 [ 31.276501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277250] RIP: 0033:0x7fa2e5eded82 [ 31.277780] 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 [ 31.280270] RSP: 002b:00007ffdb5a59198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.281323] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2e5eded82 [ 31.282294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2e5318000 [ 31.283225] RBP: 00007fa2e5318000 R08: 0000000000000009 R09: 0000000000001000 [ 31.284198] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643cc86eec0 [ 31.285164] R13: 00007ffdb5a591b0 R14: 00007ffdb5a591e0 R15: 00007ffdb5a59540 [ 31.286116] </TASK> [ 31.286441] [ 31.286680] Allocated by task 214: [ 31.287187] kasan_save_stack+0x22/0x50 [ 31.287770] kasan_set_track+0x25/0x30 [ 31.288324] __kasan_slab_alloc+0x59/0x70 [ 31.288909] kmem_cache_alloc+0x16b/0x370 [ 31.289509] vm_area_dup+0x20/0x160 [ 31.290043] __split_vma+0x170/0x950 [ 31.290587] split_vma+0xc6/0x110 [ 31.291114] mprotect_fixup+0x8d2/0xb30 [ 31.291697] do_mprotect_pkey+0x87e/0xd40 [ 31.292301] __x64_sys_mprotect+0x78/0xc0 [ 31.292909] do_syscall_64+0x3f/0x90 [ 31.293458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294202] [ 31.294451] Freed by task 211: [ 31.294918] kasan_save_stack+0x22/0x50 [ 31.295491] kasan_set_track+0x25/0x30 [ 31.296053] kasan_save_free_info+0x2b/0x50 [ 31.296656] __kasan_slab_free+0x10a/0x190 [ 31.297247] kmem_cache_free+0x10d/0x4d0 [ 31.297834] rcu_core+0x8c8/0x2860 [ 31.298338] __do_softirq+0x1b7/0x7d4 [ 31.298892] [ 31.299137] Last potentially related work creation: [ 31.299803] kasan_save_stack+0x22/0x50 [ 31.300382] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.301772] remove_vma+0x139/0x170 [ 31.302286] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.302935] do_vmi_munmap+0x1f1/0x2b0 [ 31.303487] __vm_munmap+0x138/0x3a0 [ 31.304021] __x64_sys_munmap+0x59/0x80 [ 31.304585] do_syscall_64+0x3f/0x90 [ 31.305127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305861] [ 31.306106] The buggy address belongs to the object at ffff888008f252b8 [ 31.306106] which belongs to the cache vm_area_struct of size 168 [ 31.307794] The buggy address is located 88 bytes inside of [ 31.307794] freed 168-byte region [ffff888008f252b8, ffff888008f25360) [ 31.309402] [ 31.309647] The buggy address belongs to the physical page: [ 31.310405] page:0000000018e60bca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8f25 [ 31.311649] memcg:ffff88800e840101 [ 31.312142] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.312879] page_type: 0xffffffff() [ 31.313390] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.314436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e840101 [ 31.315494] page dumped because: kasan: bad access detected [ 31.316252] [ 31.316497] Memory state around the buggy address: [ 31.317158] ffff888008f25200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.318131] ffff888008f25280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.319118] >ffff888008f25300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.320088] ^ [ 31.320618] ffff888008f25380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.321595] ffff888008f25400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.322563] ================================================================== [ 31.323853] Disabling lock debugging due to kernel taint [ 33.501879] BUG: Bad rss-counter state mm:00000000f82ef8e4 type:MM_FILEPAGES val:33 [ 33.502945] BUG: Bad rss-counter state mm:00000000f82ef8e4 type:MM_ANONPAGES val:22 [ 34.105719] BUG: Bad rss-counter state mm:0000000004b7b3c5 type:MM_FILEPAGES val:33 [ 34.106882] BUG: Bad rss-counter state mm:0000000004b7b3c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13035' (ECDSA) to the list of known hosts. 2023/06/20 13:42:26 fuzzer started 2023/06/20 13:42:26 dialing manager at localhost:36067 2023/06/20 13:42:26 checking machine... 2023/06/20 13:42:26 checking revisions... [ 34.776676] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:42:27 testing simple program... [ 34.828068] cgroup: Unknown subsys name 'net' [ 34.877539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:42:26 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=00000000000002f3 RCX=00007ff18148c320 RDX=00007ff18148bd4c RSI=00007ffe32878418 RDI=00007ff17fd33c30 RBP=0000559b48791570 RSP=00007ffe32878470 R8 =0000000000000038 R9 =00000000000aec30 R10=0000000000000002 R11=00007ff17fdb9190 R12=00000000000aec30 R13=00007ffe32878498 R14=0000000000134150 R15=00007ff17fd33c30 RIP=00007ff18141f0bd RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff18089a900 00000000 00000000 GS =0000 0000000000000000 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=00007ff17fcf1c30 CR3=000000000cae6000 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=2fccd54c36d8a3f300000000000f9290 XMM01=31095d183b8b2aacd448b68ac0c62752 XMM02=eff9b2d0a8fce9cb000000000011ffe0 XMM03=2c67c8bc2e329bc30000000000120108 XMM04=fc238f930e2f121100000000000ae988 XMM05=427947f03145f7f90000000000134068 XMM06=e4cb8bb95a7664b60000000000132f20 XMM07=fb795ef6d65770560000000000123160 XMM08=2c67c8bc2e329bc30000000000120108 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880147f7a00 RCX=0000000000000001 RDX=ffff8880147f7a08 RSI=ffff8880147f7df0 RDI=ffff8880147f7a08 RBP=ffff8880147f7df0 RSP=ffff8880147f7958 R8 =0000000000000001 R9 =ffff8880147f7a40 R10=0000000000038001 R11=0000000000091a5f R12=0000000000000008 R13=ffff8880147f7a48 R14=ffff8880147f7df0 R15=ffff8880147f7a00 RIP=ffffffff8113043d 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 00007efc26b17900 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=00007ffcfd3c3000 CR3=000000000d69a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000