syzkaller login: [ 66.121817] BUG: Bad rss-counter state mm:000000004444ef6f type:MM_FILEPAGES val:33 [ 66.122850] BUG: Bad rss-counter state mm:000000004444ef6f type:MM_ANONPAGES val:22 [ 66.294670] ================================================================== [ 66.295747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.296838] Read of size 8 at addr ffff88801a085a50 by task sshd/221 [ 66.297919] [ 66.298141] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 66.298989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.299967] Call Trace: [ 66.300286] [ 66.300573] dump_stack_lvl+0x91/0xf0 [ 66.301058] print_report+0xcc/0x620 [ 66.301535] ? __virt_addr_valid+0x102/0x340 [ 66.302090] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.302707] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.303324] kasan_report+0xbe/0xf0 [ 66.303795] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.304409] vma_interval_tree_remove+0xc75/0xec0 [ 66.305003] vma_prepare+0xc54/0x11a0 [ 66.305481] __split_vma+0x5af/0x950 [ 66.305965] ? __pfx___split_vma+0x10/0x10 [ 66.306486] ? find_held_lock+0x2c/0x110 [ 66.307004] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.307565] ? lock_is_held_type+0x9f/0x120 [ 66.308103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.308709] ? mtree_range_walk+0x632/0x900 [ 66.309254] ? mas_walk+0x5c7/0x7c0 [ 66.309719] do_vmi_munmap+0x1f1/0x2b0 [ 66.310218] mmap_region+0x1f9/0x2660 [ 66.310697] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.311209] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.311911] ? __pfx_lock_acquire+0x10/0x10 [ 66.312438] ? __pfx_mmap_region+0x10/0x10 [ 66.312964] ? security_mmap_addr+0x7d/0xa0 [ 66.313490] ? get_unmapped_area+0x1f5/0x3f0 [ 66.314062] do_mmap+0x854/0xf00 [ 66.314498] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.314992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.315546] ksys_mmap_pgoff+0x3af/0x500 [ 66.316047] do_syscall_64+0x3f/0x90 [ 66.316520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.317156] RIP: 0033:0x7fa029203d82 [ 66.317620] 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 [ 66.319731] RSP: 002b:00007ffd0ea00358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.320613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa029203d82 [ 66.321458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa02863d000 [ 66.322477] RBP: 00007fa02863d000 R08: 0000000000000009 R09: 0000000000001000 [ 66.323465] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5e014cf70 [ 66.324304] R13: 00007ffd0ea00370 R14: 00007ffd0ea003a0 R15: 00007ffd0ea00700 [ 66.325255] [ 66.325623] [ 66.325904] Allocated by task 214: [ 66.326488] kasan_save_stack+0x22/0x50 [ 66.327097] kasan_set_track+0x25/0x30 [ 66.327596] __kasan_slab_alloc+0x59/0x70 [ 66.328115] kmem_cache_alloc+0x16b/0x370 [ 66.328631] vm_area_dup+0x20/0x160 [ 66.329084] __split_vma+0x170/0x950 [ 66.329553] split_vma+0xc6/0x110 [ 66.330024] mprotect_fixup+0x8d2/0xb30 [ 66.330546] do_mprotect_pkey+0x87e/0xd40 [ 66.331061] __x64_sys_mprotect+0x78/0xc0 [ 66.331582] do_syscall_64+0x3f/0x90 [ 66.332052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.332686] [ 66.332903] Freed by task 210: [ 66.333294] kasan_save_stack+0x22/0x50 [ 66.333804] kasan_set_track+0x25/0x30 [ 66.334314] kasan_save_free_info+0x2b/0x50 [ 66.334848] __kasan_slab_free+0x10a/0x190 [ 66.335375] kmem_cache_free+0x10d/0x4d0 [ 66.335878] rcu_core+0x8c8/0x2860 [ 66.336322] __do_softirq+0x1b7/0x7d4 [ 66.336798] [ 66.337012] Last potentially related work creation: [ 66.337595] kasan_save_stack+0x22/0x50 [ 66.338118] __kasan_record_aux_stack+0x8e/0xa0 [ 66.338760] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.339399] remove_vma+0x139/0x170 [ 66.339851] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.340413] do_vmi_munmap+0x1f1/0x2b0 [ 66.340897] __vm_munmap+0x138/0x3a0 [ 66.341364] __x64_sys_munmap+0x59/0x80 [ 66.341884] do_syscall_64+0x3f/0x90 [ 66.342357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.342999] [ 66.343214] The buggy address belongs to the object at ffff88801a0859f8 [ 66.343214] which belongs to the cache vm_area_struct of size 168 [ 66.344665] The buggy address is located 88 bytes inside of [ 66.344665] freed 168-byte region [ffff88801a0859f8, ffff88801a085aa0) [ 66.346091] [ 66.346307] The buggy address belongs to the physical page: [ 66.346969] page:00000000d626949d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a085 [ 66.348066] memcg:ffff88801a0b0701 [ 66.348501] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.349140] page_type: 0xffffffff() [ 66.349594] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.350533] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0b0701 [ 66.351448] page dumped because: kasan: bad access detected [ 66.352106] [ 66.352324] Memory state around the buggy address: [ 66.352895] ffff88801a085900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.353748] ffff88801a085980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 66.354614] >ffff88801a085a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.355461] ^ [ 66.356161] ffff88801a085a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 66.357012] ffff88801a085b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.357865] ================================================================== [ 66.358817] Disabling lock debugging due to kernel taint [ 68.978062] BUG: Bad rss-counter state mm:000000005431aa9b type:MM_FILEPAGES val:33 [ 68.978979] BUG: Bad rss-counter state mm:000000005431aa9b type:MM_ANONPAGES val:22 [ 69.447904] BUG: Bad rss-counter state mm:000000005fd4b1d2 type:MM_FILEPAGES val:33 [ 69.449478] BUG: Bad rss-counter state mm:000000005fd4b1d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25038' (ECDSA) to the list of known hosts. 2023/06/19 14:41:02 fuzzer started 2023/06/19 14:41:02 dialing manager at localhost:44161 2023/06/19 14:41:02 checking machine... 2023/06/19 14:41:02 checking revisions... [ 70.197092] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:41:03 testing simple program... [ 70.244420] cgroup: Unknown subsys name 'net' [ 70.291424] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:40:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f29803be360 CR3=000000000c4d8000 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=b8df07407dca87a45241d28cacf6ad63 XMM02=000000000011f918ec2efd57dc4c00df XMM03=0000000000123fe8ea3179831679af20 XMM04=41481a913c6c945600000000000ae988 XMM05=192ced1d4d00810b0000000000134080 XMM06=c291bd5c70af25b90000000000133a78 XMM07=e042d86d42eb936e0000000000124268 XMM08=ea3179831679af20000000000011f978 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=1ffff1100d9e1356 RSI=1ffff1100d9e1355 RDI=ffff88800f53fff0 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b9d5a R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b6996 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88800f53ff58 R15=ffff88806cf09a50 RIP=ffffffff8113185d 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 00007f6d9d949900 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=00007ffcaee7c000 CR3=000000000fc08000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000