syzkaller login: [ 34.187080] BUG: Bad rss-counter state mm:0000000052826a2d type:MM_FILEPAGES val:33 [ 34.188108] BUG: Bad rss-counter state mm:0000000052826a2d type:MM_ANONPAGES val:22 [ 34.372689] ================================================================== [ 34.373602] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.374531] Read of size 8 at addr ffff888019e0a5c8 by task sshd/221 [ 34.375291] [ 34.375511] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.376564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.377561] Call Trace: [ 34.377876] [ 34.378162] dump_stack_lvl+0x91/0xf0 [ 34.378647] print_report+0xcc/0x620 [ 34.379126] ? __virt_addr_valid+0x102/0x340 [ 34.379680] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.380292] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.380914] kasan_report+0xbe/0xf0 [ 34.381394] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.382011] vma_interval_tree_remove+0xc75/0xec0 [ 34.382617] vma_prepare+0xc54/0x11a0 [ 34.383092] __split_vma+0x5af/0x950 [ 34.383555] ? __pfx___split_vma+0x10/0x10 [ 34.384080] ? find_held_lock+0x2c/0x110 [ 34.384599] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.385154] ? lock_is_held_type+0x9f/0x120 [ 34.385693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.386295] ? mtree_range_walk+0x632/0x900 [ 34.386839] ? mas_walk+0x5c7/0x7c0 [ 34.387307] do_vmi_munmap+0x1f1/0x2b0 [ 34.387792] mmap_region+0x1f9/0x2660 [ 34.388265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.388780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.389504] ? __pfx_lock_acquire+0x10/0x10 [ 34.390032] ? __pfx_mmap_region+0x10/0x10 [ 34.390562] ? security_mmap_addr+0x7d/0xa0 [ 34.391085] ? get_unmapped_area+0x1f5/0x3f0 [ 34.391629] do_mmap+0x854/0xf00 [ 34.392070] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.392557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.393114] ksys_mmap_pgoff+0x3af/0x500 [ 34.393621] do_syscall_64+0x3f/0x90 [ 34.394097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.394734] RIP: 0033:0x7fec92bb7d82 [ 34.395189] 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 [ 34.397311] RSP: 002b:00007ffee25ac978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.398196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec92bb7d82 [ 34.399044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec91ff1000 [ 34.399900] RBP: 00007fec91ff1000 R08: 0000000000000009 R09: 0000000000001000 [ 34.400745] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df8901eec0 [ 34.401601] R13: 00007ffee25ac990 R14: 00007ffee25ac9c0 R15: 00007ffee25acd20 [ 34.402453] [ 34.402741] [ 34.402955] Allocated by task 212: [ 34.403384] kasan_save_stack+0x22/0x50 [ 34.403892] kasan_set_track+0x25/0x30 [ 34.404385] __kasan_slab_alloc+0x59/0x70 [ 34.404900] kmem_cache_alloc+0x16b/0x370 [ 34.405431] vm_area_dup+0x20/0x160 [ 34.405880] __split_vma+0x170/0x950 [ 34.406351] split_vma+0xc6/0x110 [ 34.406790] mprotect_fixup+0x8d2/0xb30 [ 34.407290] do_mprotect_pkey+0x87e/0xd40 [ 34.407802] __x64_sys_mprotect+0x78/0xc0 [ 34.408315] do_syscall_64+0x3f/0x90 [ 34.408779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.409420] [ 34.409634] Freed by task 212: [ 34.410031] kasan_save_stack+0x22/0x50 [ 34.410530] kasan_set_track+0x25/0x30 [ 34.411017] kasan_save_free_info+0x2b/0x50 [ 34.411541] __kasan_slab_free+0x10a/0x190 [ 34.412072] kmem_cache_free+0x10d/0x4d0 [ 34.412572] rcu_core+0x8c8/0x2860 [ 34.413011] __do_softirq+0x1b7/0x7d4 [ 34.413500] [ 34.413713] Last potentially related work creation: [ 34.414286] kasan_save_stack+0x22/0x50 [ 34.414782] __kasan_record_aux_stack+0x8e/0xa0 [ 34.415366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.416003] remove_vma+0x139/0x170 [ 34.416449] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.416996] do_vmi_munmap+0x1f1/0x2b0 [ 34.417577] __vm_munmap+0x138/0x3a0 [ 34.418041] __x64_sys_munmap+0x59/0x80 [ 34.418531] do_syscall_64+0x3f/0x90 [ 34.418999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.419633] [ 34.419845] The buggy address belongs to the object at ffff888019e0a570 [ 34.419845] which belongs to the cache vm_area_struct of size 168 [ 34.421297] The buggy address is located 88 bytes inside of [ 34.421297] freed 168-byte region [ffff888019e0a570, ffff888019e0a618) [ 34.422680] [ 34.422893] The buggy address belongs to the physical page: [ 34.423542] page:0000000011312b5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e0a [ 34.424631] memcg:ffff88800f741001 [ 34.425058] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.425710] page_type: 0xffffffff() [ 34.426156] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.427062] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f741001 [ 34.427960] page dumped because: kasan: bad access detected [ 34.428618] [ 34.428830] Memory state around the buggy address: [ 34.429413] ffff888019e0a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.430249] ffff888019e0a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.431095] >ffff888019e0a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.431943] ^ [ 34.432595] ffff888019e0a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.433452] ffff888019e0a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.434290] ================================================================== [ 34.435220] Disabling lock debugging due to kernel taint [ 36.820801] BUG: Bad rss-counter state mm:0000000048d30621 type:MM_FILEPAGES val:33 [ 36.822474] BUG: Bad rss-counter state mm:0000000048d30621 type:MM_ANONPAGES val:22 [ 37.289175] BUG: Bad rss-counter state mm:0000000070f11380 type:MM_FILEPAGES val:33 [ 37.290231] BUG: Bad rss-counter state mm:0000000070f11380 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1871' (ECDSA) to the list of known hosts. 2023/06/19 21:17:26 fuzzer started 2023/06/19 21:17:26 dialing manager at localhost:44161 2023/06/19 21:17:26 checking machine... 2023/06/19 21:17:26 checking revisions... [ 38.011499] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:17:27 testing simple program... [ 38.064208] cgroup: Unknown subsys name 'net' [ 38.106246] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:17:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880103ff400 RCX=0000000000000001 RDX=1ffff1100207fe80 RSI=ffffffff83639306 RDI=ffff8880103ff40c RBP=0000000000000008 RSP=ffff8880103ff318 R8 =0000000000000001 R9 =ffff8880103ff378 R10=0000000000038001 R11=000000000009a9a2 R12=ffff8880103ff400 R13=0000000000000000 R14=ffff888014641b40 R15=0000000000400cc0 RIP=ffffffff813ad4cf 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 00007f6ac40e4900 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=00007f07d0696650 CR3=000000000cc08000 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=33be32618dc961f500000000000ae988 XMM05=388c35c0542ca4430000000000134668 XMM06=1f73e079dcffaf5c0000000000133408 XMM07=fb795ef6d657705600000000001239d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016be2000 RCX=0000000000000000 RDX=1ffff11002d7c402 RSI=ffffffff81f10def RDI=ffff888016be2010 RBP=ffff888019c7fda8 RSP=ffff888019c7fc38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888019c7fe30 R14=1ffff1100338ff8c R15=000000000000000c RIP=ffffffff81f10e04 RFL=00000212 [----A--] 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 00007f07d00e1900 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=00007f07d0698618 CR3=0000000015996000 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