syzkaller login: [ 38.973932] BUG: Bad rss-counter state mm:00000000566541b6 type:MM_FILEPAGES val:33 [ 38.975068] BUG: Bad rss-counter state mm:00000000566541b6 type:MM_ANONPAGES val:22 [ 39.016767] ================================================================== [ 39.017856] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.018948] Read of size 8 at addr ffff888016732c20 by task sshd/226 [ 39.019782] [ 39.020001] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.021148] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.022195] Call Trace: [ 39.022514] [ 39.022810] dump_stack_lvl+0x91/0xf0 [ 39.023322] print_report+0xcc/0x620 [ 39.023823] ? __virt_addr_valid+0x102/0x340 [ 39.024379] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.025015] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.025627] kasan_report+0xbe/0xf0 [ 39.026103] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.026731] vma_interval_tree_remove+0xc75/0xec0 [ 39.027358] vma_prepare+0xc54/0x11a0 [ 39.027828] __split_vma+0x5af/0x950 [ 39.028296] ? __pfx___split_vma+0x10/0x10 [ 39.028816] ? find_held_lock+0x2c/0x110 [ 39.029326] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.029879] ? lock_is_held_type+0x9f/0x120 [ 39.030409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.031019] ? mtree_range_walk+0x632/0x900 [ 39.031569] ? mas_walk+0x5c7/0x7c0 [ 39.032041] do_vmi_munmap+0x1f1/0x2b0 [ 39.032524] mmap_region+0x1f9/0x2660 [ 39.033001] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.033502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.034201] ? __pfx_lock_acquire+0x10/0x10 [ 39.034732] ? __pfx_mmap_region+0x10/0x10 [ 39.035282] ? security_mmap_addr+0x7d/0xa0 [ 39.035813] ? get_unmapped_area+0x1f5/0x3f0 [ 39.036358] do_mmap+0x854/0xf00 [ 39.036795] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.037285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.037843] ksys_mmap_pgoff+0x3af/0x500 [ 39.038360] do_syscall_64+0x3f/0x90 [ 39.038837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039509] RIP: 0033:0x7fe033f3fd82 [ 39.039961] 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 [ 39.042070] RSP: 002b:00007fffce690e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.042976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe033f3fd82 [ 39.043812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe033379000 [ 39.044656] RBP: 00007fe033379000 R08: 0000000000000009 R09: 0000000000001000 [ 39.045496] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b74a97cec0 [ 39.046342] R13: 00007fffce690ea0 R14: 00007fffce690ed0 R15: 00007fffce691230 [ 39.047202] [ 39.047494] [ 39.047712] Allocated by task 219: [ 39.048148] kasan_save_stack+0x22/0x50 [ 39.048653] kasan_set_track+0x25/0x30 [ 39.049143] __kasan_slab_alloc+0x59/0x70 [ 39.049666] kmem_cache_alloc+0x16b/0x370 [ 39.050181] vm_area_dup+0x20/0x160 [ 39.050640] __split_vma+0x170/0x950 [ 39.051129] split_vma+0xc6/0x110 [ 39.051578] mprotect_fixup+0x8d2/0xb30 [ 39.052077] do_mprotect_pkey+0x87e/0xd40 [ 39.052600] __x64_sys_mprotect+0x78/0xc0 [ 39.053126] do_syscall_64+0x3f/0x90 [ 39.053600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.054248] [ 39.054460] Freed by task 219: [ 39.054853] kasan_save_stack+0x22/0x50 [ 39.055364] kasan_set_track+0x25/0x30 [ 39.055870] kasan_save_free_info+0x2b/0x50 [ 39.056401] __kasan_slab_free+0x10a/0x190 [ 39.056934] kmem_cache_free+0x10d/0x4d0 [ 39.057471] rcu_core+0x8c8/0x2860 [ 39.057936] __do_softirq+0x1b7/0x7d4 [ 39.058413] [ 39.058626] Last potentially related work creation: [ 39.059257] kasan_save_stack+0x22/0x50 [ 39.059776] __kasan_record_aux_stack+0x8e/0xa0 [ 39.060369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.061038] remove_vma+0x139/0x170 [ 39.061489] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.062054] do_vmi_munmap+0x1f1/0x2b0 [ 39.062538] __vm_munmap+0x138/0x3a0 [ 39.063018] __x64_sys_munmap+0x59/0x80 [ 39.063522] do_syscall_64+0x3f/0x90 [ 39.064009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.064652] [ 39.064868] The buggy address belongs to the object at ffff888016732bc8 [ 39.064868] which belongs to the cache vm_area_struct of size 168 [ 39.066352] The buggy address is located 88 bytes inside of [ 39.066352] freed 168-byte region [ffff888016732bc8, ffff888016732c70) [ 39.067778] [ 39.068005] The buggy address belongs to the physical page: [ 39.068697] page:00000000c94f3590 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16732 [ 39.069864] memcg:ffff88800efea401 [ 39.070317] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.071011] page_type: 0xffffffff() [ 39.071486] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.072473] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efea401 [ 39.073432] page dumped because: kasan: bad access detected [ 39.074122] [ 39.074354] Memory state around the buggy address: [ 39.074984] ffff888016732b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.075906] ffff888016732b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.076814] >ffff888016732c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.077712] ^ [ 39.078282] ffff888016732c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.079225] ffff888016732d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.080129] ================================================================== [ 39.081177] Disabling lock debugging due to kernel taint [ 41.687526] BUG: Bad rss-counter state mm:000000006486e13e type:MM_FILEPAGES val:33 [ 41.688672] BUG: Bad rss-counter state mm:000000006486e13e type:MM_ANONPAGES val:22 [ 42.175519] BUG: Bad rss-counter state mm:000000002efec65a type:MM_FILEPAGES val:33 [ 42.176547] BUG: Bad rss-counter state mm:000000002efec65a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53858' (ECDSA) to the list of known hosts. 2023/06/20 11:01:55 fuzzer started 2023/06/20 11:01:55 dialing manager at localhost:36067 2023/06/20 11:01:55 checking machine... 2023/06/20 11:01:55 checking revisions... [ 42.768883] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:01:55 testing simple program... [ 42.804930] cgroup: Unknown subsys name 'net' [ 42.834189] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:01:55 Registers: info registers vcpu 0 RAX=ffffffff86138e91 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000001 RDI=ffffffff85dfe000 RBP=ffff888008d9f9d0 RSP=ffff888008d9f908 R8 =ffffffff86138e62 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9f9b9 R15=ffff888008d9f978 RIP=ffffffff81130a6e 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 0000000000000000 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=00007f988315db98 CR3=000000000eb00000 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=2034353a31303a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3533 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3533325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000c RCX=0000000000000000 RDX=ffff88800edf51c0 RSI=ffffffff8184ce5e RDI=0000000000000007 RBP=ffff88800ef37e10 RSP=ffff88800ef37c88 R8 =0000000000000007 R9 =0000000000000000 R10=000000000000000c R11=0000000000000000 R12=ffff88800ef37e10 R13=0000000000000000 R14=000000000000000c R15=0000000000000000 RIP=ffffffff814c089b 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 00007fcc88cee900 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=00007fff87ce8000 CR3=000000000f5f6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000