syzkaller login: [ 29.314112] BUG: Bad rss-counter state mm:000000003fe6b1a9 type:MM_FILEPAGES val:33 [ 29.315125] BUG: Bad rss-counter state mm:000000003fe6b1a9 type:MM_ANONPAGES val:22 [ 29.476647] ================================================================== [ 29.477526] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.478436] Read of size 8 at addr ffff88800ee6a4e0 by task sshd/219 [ 29.479271] [ 29.479488] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.480358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.481342] Call Trace: [ 29.481654] [ 29.481932] dump_stack_lvl+0x91/0xf0 [ 29.482417] print_report+0xcc/0x620 [ 29.482896] ? __virt_addr_valid+0x102/0x340 [ 29.483428] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.484030] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.484652] kasan_report+0xbe/0xf0 [ 29.485128] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.485739] vma_interval_tree_remove+0xc75/0xec0 [ 29.486339] vma_prepare+0xc54/0x11a0 [ 29.486804] __split_vma+0x5af/0x950 [ 29.487268] ? __pfx___split_vma+0x10/0x10 [ 29.487783] ? find_held_lock+0x2c/0x110 [ 29.488302] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.488863] ? lock_is_held_type+0x9f/0x120 [ 29.489384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.489979] ? mtree_range_walk+0x632/0x900 [ 29.490520] ? mas_walk+0x5c7/0x7c0 [ 29.490991] do_vmi_munmap+0x1f1/0x2b0 [ 29.491480] mmap_region+0x1f9/0x2660 [ 29.491952] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.492467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.493162] ? __pfx_lock_acquire+0x10/0x10 [ 29.493682] ? __pfx_mmap_region+0x10/0x10 [ 29.494200] ? security_mmap_addr+0x7d/0xa0 [ 29.494715] ? get_unmapped_area+0x1f5/0x3f0 [ 29.495252] do_mmap+0x854/0xf00 [ 29.495684] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.496179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.496731] ksys_mmap_pgoff+0x3af/0x500 [ 29.497227] do_syscall_64+0x3f/0x90 [ 29.497695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.498328] RIP: 0033:0x7f74850a5d82 [ 29.498777] 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 [ 29.500846] RSP: 002b:00007ffef0aa2568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.501731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74850a5d82 [ 29.502564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74844df000 [ 29.503395] RBP: 00007f74844df000 R08: 0000000000000009 R09: 0000000000001000 [ 29.504230] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de86691f70 [ 29.505059] R13: 00007ffef0aa2580 R14: 00007ffef0aa25b0 R15: 00007ffef0aa2910 [ 29.505901] [ 29.506187] [ 29.506402] Allocated by task 212: [ 29.506834] kasan_save_stack+0x22/0x50 [ 29.507328] kasan_set_track+0x25/0x30 [ 29.507813] __kasan_slab_alloc+0x59/0x70 [ 29.508335] kmem_cache_alloc+0x16b/0x370 [ 29.508837] vm_area_dup+0x20/0x160 [ 29.509278] __split_vma+0x170/0x950 [ 29.509733] split_vma+0xc6/0x110 [ 29.510159] mprotect_fixup+0x8d2/0xb30 [ 29.510649] do_mprotect_pkey+0x87e/0xd40 [ 29.511158] __x64_sys_mprotect+0x78/0xc0 [ 29.511664] do_syscall_64+0x3f/0x90 [ 29.512129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.512782] [ 29.512993] Freed by task 13: [ 29.513366] kasan_save_stack+0x22/0x50 [ 29.513855] kasan_set_track+0x25/0x30 [ 29.514335] kasan_save_free_info+0x2b/0x50 [ 29.514856] __kasan_slab_free+0x10a/0x190 [ 29.515378] kmem_cache_free+0x10d/0x4d0 [ 29.515877] rcu_core+0x8c8/0x2860 [ 29.516319] __do_softirq+0x1b7/0x7d4 [ 29.516785] [ 29.516998] Last potentially related work creation: [ 29.517571] kasan_save_stack+0x22/0x50 [ 29.518062] __kasan_record_aux_stack+0x8e/0xa0 [ 29.518621] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.519250] remove_vma+0x139/0x170 [ 29.519691] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.520245] do_vmi_munmap+0x1f1/0x2b0 [ 29.520721] __vm_munmap+0x138/0x3a0 [ 29.521177] __x64_sys_munmap+0x59/0x80 [ 29.521663] do_syscall_64+0x3f/0x90 [ 29.522128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.522756] [ 29.522966] The buggy address belongs to the object at ffff88800ee6a488 [ 29.522966] which belongs to the cache vm_area_struct of size 168 [ 29.524408] The buggy address is located 88 bytes inside of [ 29.524408] freed 168-byte region [ffff88800ee6a488, ffff88800ee6a530) [ 29.525768] [ 29.525982] The buggy address belongs to the physical page: [ 29.526620] page:00000000e64a0dc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee6a [ 29.527696] memcg:ffff88800ea7ec01 [ 29.528131] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.528856] page_type: 0xffffffff() [ 29.529313] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 29.530244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea7ec01 [ 29.531163] page dumped because: kasan: bad access detected [ 29.531833] [ 29.532051] Memory state around the buggy address: [ 29.532664] ffff88800ee6a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.533540] ffff88800ee6a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.534405] >ffff88800ee6a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.535266] ^ [ 29.536030] ffff88800ee6a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.536907] ffff88800ee6a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.537770] ================================================================== [ 29.538843] Disabling lock debugging due to kernel taint [ 31.437829] BUG: Bad rss-counter state mm:00000000a107005c type:MM_FILEPAGES val:33 [ 31.439021] BUG: Bad rss-counter state mm:00000000a107005c type:MM_ANONPAGES val:22 [ 31.880578] BUG: Bad rss-counter state mm:00000000bd711307 type:MM_FILEPAGES val:33 [ 31.882033] BUG: Bad rss-counter state mm:00000000bd711307 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8953' (ECDSA) to the list of known hosts. 2023/06/19 15:30:55 fuzzer started 2023/06/19 15:30:55 dialing manager at localhost:44161 2023/06/19 15:30:55 checking machine... 2023/06/19 15:30:55 checking revisions... [ 32.638766] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:30:55 testing simple program... [ 32.682810] cgroup: Unknown subsys name 'net' [ 32.735331] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:30:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c138d RSI=ffffffff81718af8 RDI=ffff88806ce09a78 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000001dbdd R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800f1dd1c0 R15=ffff88800d832b80 RIP=ffffffff811305de 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7b22c3e900 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=00007f7b2215f000 CR3=0000000009636000 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=b3285ca56c489dff0000000000111248 XMM01=d59e07bde36eea69000000000011e4d8 XMM02=ec2efd57dc4c00df000000000011e5e0 XMM03=86fbba268c52547b000000000011e6b0 XMM04=4f6e9adb50df896400000000000ae988 XMM05=d7157a71491173520000000000135d60 XMM06=19e9129bd510f2350000000000134ea8 XMM07=fb795ef6d65770560000000000124c08 XMM08=2c67c8bc2e329bc3000000000011e650 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f3ebb0a0d77 RCX=0000000000000000 RDX=ffff888010111b40 RSI=00007f3ebb0a0d77 RDI=ffffffff856528e0 RBP=00007f3ebb0a0d77 RSP=ffff888018167a58 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888018167b68 R13=0000000000000000 R14=ffff888010111b40 R15=dffffc0000000000 RIP=ffffffff814c83d4 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 00007f3ebabb9900 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=00007ffde712a000 CR3=000000000e67c000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000