syzkaller login: [ 30.658740] BUG: Bad rss-counter state mm:00000000735a77c3 type:MM_FILEPAGES val:33 [ 30.659816] BUG: Bad rss-counter state mm:00000000735a77c3 type:MM_ANONPAGES val:22 [ 30.796001] ================================================================== [ 30.797088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.798214] Read of size 8 at addr ffff88800dd62ed8 by task sshd/220 [ 30.799237] [ 30.799459] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.800340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.801339] Call Trace: [ 30.801657] [ 30.801938] dump_stack_lvl+0x91/0xf0 [ 30.802428] print_report+0xcc/0x620 [ 30.802921] ? __virt_addr_valid+0x102/0x340 [ 30.803497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804130] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804750] kasan_report+0xbe/0xf0 [ 30.805220] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805833] vma_interval_tree_remove+0xc75/0xec0 [ 30.806430] vma_prepare+0xc54/0x11a0 [ 30.806904] __split_vma+0x5af/0x950 [ 30.807396] ? __pfx___split_vma+0x10/0x10 [ 30.807918] ? find_held_lock+0x2c/0x110 [ 30.808435] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.808995] ? lock_is_held_type+0x9f/0x120 [ 30.809529] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.810126] ? mtree_range_walk+0x632/0x900 [ 30.810675] ? mas_walk+0x5c7/0x7c0 [ 30.811152] do_vmi_munmap+0x1f1/0x2b0 [ 30.811645] mmap_region+0x1f9/0x2660 [ 30.812131] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.812643] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.813352] ? __pfx_lock_acquire+0x10/0x10 [ 30.813879] ? __pfx_mmap_region+0x10/0x10 [ 30.814400] ? security_mmap_addr+0x7d/0xa0 [ 30.814929] ? get_unmapped_area+0x1f5/0x3f0 [ 30.815487] do_mmap+0x854/0xf00 [ 30.815923] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.816409] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.816966] ksys_mmap_pgoff+0x3af/0x500 [ 30.817471] do_syscall_64+0x3f/0x90 [ 30.817948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818591] RIP: 0033:0x7fdab655fd82 [ 30.819042] 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 [ 30.821153] RSP: 002b:00007ffe802a5ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.822046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdab655fd82 [ 30.822882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdab5999000 [ 30.823788] RBP: 00007fdab5999000 R08: 0000000000000009 R09: 0000000000001000 [ 30.824623] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baea123ec0 [ 30.825467] R13: 00007ffe802a5ec0 R14: 00007ffe802a5ef0 R15: 00007ffe802a6250 [ 30.826316] [ 30.826606] [ 30.826817] Allocated by task 213: [ 30.827260] kasan_save_stack+0x22/0x50 [ 30.827763] kasan_set_track+0x25/0x30 [ 30.828249] __kasan_slab_alloc+0x59/0x70 [ 30.828770] kmem_cache_alloc+0x16b/0x370 [ 30.829278] vm_area_dup+0x20/0x160 [ 30.829729] __split_vma+0x170/0x950 [ 30.830196] split_vma+0xc6/0x110 [ 30.830630] mprotect_fixup+0x8d2/0xb30 [ 30.831130] do_mprotect_pkey+0x87e/0xd40 [ 30.831652] __x64_sys_mprotect+0x78/0xc0 [ 30.832167] do_syscall_64+0x3f/0x90 [ 30.832635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833275] [ 30.833489] Freed by task 213: [ 30.833874] kasan_save_stack+0x22/0x50 [ 30.834368] kasan_set_track+0x25/0x30 [ 30.834859] kasan_save_free_info+0x2b/0x50 [ 30.835397] __kasan_slab_free+0x10a/0x190 [ 30.835928] kmem_cache_free+0x10d/0x4d0 [ 30.836426] rcu_core+0x8c8/0x2860 [ 30.836873] __do_softirq+0x1b7/0x7d4 [ 30.837348] [ 30.837567] Last potentially related work creation: [ 30.838144] kasan_save_stack+0x22/0x50 [ 30.838644] __kasan_record_aux_stack+0x8e/0xa0 [ 30.839225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.839865] remove_vma+0x139/0x170 [ 30.840385] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.840933] do_vmi_munmap+0x1f1/0x2b0 [ 30.841410] __vm_munmap+0x138/0x3a0 [ 30.841871] __x64_sys_munmap+0x59/0x80 [ 30.842367] do_syscall_64+0x3f/0x90 [ 30.842837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843490] [ 30.843704] Second to last potentially related work creation: [ 30.844382] kasan_save_stack+0x22/0x50 [ 30.844882] __kasan_record_aux_stack+0x8e/0xa0 [ 30.845448] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.846085] remove_vma+0x139/0x170 [ 30.846533] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.847105] do_vmi_munmap+0x1f1/0x2b0 [ 30.847593] mmap_region+0x1f9/0x2660 [ 30.848065] do_mmap+0x854/0xf00 [ 30.848491] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.848974] ksys_mmap_pgoff+0x3af/0x500 [ 30.849468] do_syscall_64+0x3f/0x90 [ 30.849938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850577] [ 30.850788] The buggy address belongs to the object at ffff88800dd62e80 [ 30.850788] which belongs to the cache vm_area_struct of size 168 [ 30.852233] The buggy address is located 88 bytes inside of [ 30.852233] freed 168-byte region [ffff88800dd62e80, ffff88800dd62f28) [ 30.853611] [ 30.853826] The buggy address belongs to the physical page: [ 30.854472] page:000000003e9bd552 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd62 [ 30.855559] memcg:ffff88800da4b001 [ 30.855977] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.856665] page_type: 0xffffffff() [ 30.857108] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.858008] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da4b001 [ 30.858902] page dumped because: kasan: bad access detected [ 30.859662] [ 30.859876] Memory state around the buggy address: [ 30.860455] ffff88800dd62d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.861299] ffff88800dd62e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.862132] >ffff88800dd62e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.862970] ^ [ 30.863689] ffff88800dd62f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.864530] ffff88800dd62f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.865373] ================================================================== [ 30.866299] Disabling lock debugging due to kernel taint [ 33.284841] BUG: Bad rss-counter state mm:00000000043c0653 type:MM_FILEPAGES val:33 [ 33.286110] BUG: Bad rss-counter state mm:00000000043c0653 type:MM_ANONPAGES val:22 [ 33.823335] BUG: Bad rss-counter state mm:000000003266f16f type:MM_FILEPAGES val:33 [ 33.824567] BUG: Bad rss-counter state mm:000000003266f16f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48487' (ECDSA) to the list of known hosts. 2023/06/20 10:56:30 fuzzer started 2023/06/20 10:56:30 dialing manager at localhost:36067 2023/06/20 10:56:30 checking machine... 2023/06/20 10:56:30 checking revisions... [ 34.485884] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:56:30 testing simple program... [ 34.529769] cgroup: Unknown subsys name 'net' [ 34.576720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:30 Registers: info registers vcpu 0 RAX=00000000000000a4 RBX=1ffff11003079fc2 RCX=0000000000000000 RDX=ffff888016e1b680 RSI=ffffffff83640624 RDI=0000000000000000 RBP=0000000000000001 RSP=ffff8880183cfe10 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000099200000992 R12=0000000000000000 R13=ffff888019aebf40 R14=00007ffed60b80a0 R15=0000000000000000 RIP=ffffffff83641c49 RFL=00000286 [--S--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 00007fc85ad04900 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=00007fc85b2bb618 CR3=000000001ca46000 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=0000000000000058 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000010376 RSI=ffffffff8219168b RDI=0000000000000007 RBP=0000000000010376 RSP=ffff88800f46f410 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010376 R11=0000000000000128 R12=0000000000010376 R13=0000000000000000 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff8219168f RFL=00000093 [--S-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 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=00007f6110858250 CR3=000000000c802000 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=c6363ff43c86f49b8644f98ca596c9c9 XMM02=000000000011b470d59e07bde36eea69 XMM03=000000000011b598ec2efd57dc4c00df XMM04=e0ea6942056d9e5c00000000000ae988 XMM05=c8a7ed3b0682573a0000000000134130 XMM06=4fda316b135da52b0000000000132f20 XMM07=fb795ef6d65770560000000000121e60 XMM08=2c67c8bc2e329bc3000000000011b598 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000