syzkaller login: [ 35.615232] BUG: Bad rss-counter state mm:000000003b3c09ba type:MM_FILEPAGES val:33 [ 35.616521] BUG: Bad rss-counter state mm:000000003b3c09ba type:MM_ANONPAGES val:22 [ 35.780604] ================================================================== [ 35.781596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.782596] Read of size 8 at addr ffff88800ef67a50 by task sshd/218 [ 35.783592] [ 35.783828] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.784759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.785816] Call Trace: [ 35.786184] [ 35.786503] dump_stack_lvl+0x91/0xf0 [ 35.787101] print_report+0xcc/0x620 [ 35.787644] ? __virt_addr_valid+0x102/0x340 [ 35.788279] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.788974] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.789674] kasan_report+0xbe/0xf0 [ 35.790218] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.790904] vma_interval_tree_remove+0xc75/0xec0 [ 35.791614] vma_prepare+0xc54/0x11a0 [ 35.792181] __split_vma+0x5af/0x950 [ 35.792701] ? __pfx___split_vma+0x10/0x10 [ 35.793302] ? find_held_lock+0x2c/0x110 [ 35.793884] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.794514] ? lock_is_held_type+0x9f/0x120 [ 35.795151] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.795817] ? mtree_range_walk+0x632/0x900 [ 35.796435] ? mas_walk+0x5c7/0x7c0 [ 35.796972] do_vmi_munmap+0x1f1/0x2b0 [ 35.797506] mmap_region+0x1f9/0x2660 [ 35.798044] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.798601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.799429] ? __pfx_lock_acquire+0x10/0x10 [ 35.800034] ? __pfx_mmap_region+0x10/0x10 [ 35.800626] ? security_mmap_addr+0x7d/0xa0 [ 35.801218] ? get_unmapped_area+0x1f5/0x3f0 [ 35.801828] do_mmap+0x854/0xf00 [ 35.802333] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.802868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.803532] ksys_mmap_pgoff+0x3af/0x500 [ 35.804111] do_syscall_64+0x3f/0x90 [ 35.804630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.805344] RIP: 0033:0x7fcd344f2d82 [ 35.805837] 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 [ 35.808198] RSP: 002b:00007ffeb9882528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.809195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd344f2d82 [ 35.810143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd3392c000 [ 35.811113] RBP: 00007fcd3392c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.812042] R10: 0000000000000812 R11: 0000000000000206 R12: 000056218bfe6f70 [ 35.812967] R13: 00007ffeb9882540 R14: 00007ffeb9882570 R15: 00007ffeb98828d0 [ 35.813907] [ 35.814235] [ 35.814467] Allocated by task 211: [ 35.814941] kasan_save_stack+0x22/0x50 [ 35.815521] kasan_set_track+0x25/0x30 [ 35.816072] __kasan_slab_alloc+0x59/0x70 [ 35.816646] kmem_cache_alloc+0x16b/0x370 [ 35.817222] vm_area_dup+0x20/0x160 [ 35.817710] __split_vma+0x170/0x950 [ 35.818234] split_vma+0xc6/0x110 [ 35.818713] mprotect_fixup+0x8d2/0xb30 [ 35.819283] do_mprotect_pkey+0x87e/0xd40 [ 35.819844] __x64_sys_mprotect+0x78/0xc0 [ 35.820418] do_syscall_64+0x3f/0x90 [ 35.820947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.821651] [ 35.821882] Freed by task 202: [ 35.822356] kasan_save_stack+0x22/0x50 [ 35.822965] kasan_set_track+0x25/0x30 [ 35.823612] kasan_save_free_info+0x2b/0x50 [ 35.824305] __kasan_slab_free+0x10a/0x190 [ 35.825008] kmem_cache_free+0x10d/0x4d0 [ 35.825670] rcu_core+0x8c8/0x2860 [ 35.826257] __do_softirq+0x1b7/0x7d4 [ 35.826885] [ 35.827137] Last potentially related work creation: [ 35.827752] kasan_save_stack+0x22/0x50 [ 35.828303] __kasan_record_aux_stack+0x8e/0xa0 [ 35.828923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.829601] remove_vma+0x139/0x170 [ 35.830150] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.830786] do_vmi_munmap+0x1f1/0x2b0 [ 35.831304] __vm_munmap+0x138/0x3a0 [ 35.831784] __x64_sys_munmap+0x59/0x80 [ 35.832294] do_syscall_64+0x3f/0x90 [ 35.832781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.833446] [ 35.833671] The buggy address belongs to the object at ffff88800ef679f8 [ 35.833671] which belongs to the cache vm_area_struct of size 168 [ 35.835187] The buggy address is located 88 bytes inside of [ 35.835187] freed 168-byte region [ffff88800ef679f8, ffff88800ef67aa0) [ 35.836611] [ 35.836834] The buggy address belongs to the physical page: [ 35.837504] page:000000004a29acee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef67 [ 35.838610] memcg:ffff88800ed8c001 [ 35.839045] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.839908] page_type: 0xffffffff() [ 35.840390] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d4880 dead000000000005 [ 35.841380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed8c001 [ 35.842343] page dumped because: kasan: bad access detected [ 35.843049] [ 35.843289] Memory state around the buggy address: [ 35.843901] ffff88800ef67900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.844812] ffff88800ef67980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.845717] >ffff88800ef67a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.846623] ^ [ 35.847374] ffff88800ef67a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.848271] ffff88800ef67b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.849171] ================================================================== [ 35.850241] Disabling lock debugging due to kernel taint [ 38.553623] BUG: Bad rss-counter state mm:000000004e79f416 type:MM_FILEPAGES val:33 [ 38.555166] BUG: Bad rss-counter state mm:000000004e79f416 type:MM_ANONPAGES val:22 [ 38.932431] BUG: Bad rss-counter state mm:00000000b3b3e6a6 type:MM_FILEPAGES val:33 [ 38.933472] BUG: Bad rss-counter state mm:00000000b3b3e6a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38353' (ECDSA) to the list of known hosts. 2023/06/20 21:18:58 fuzzer started 2023/06/20 21:18:59 dialing manager at localhost:36067 2023/06/20 21:18:59 checking machine... 2023/06/20 21:18:59 checking revisions... [ 39.598198] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:18:59 testing simple program... [ 39.644091] cgroup: Unknown subsys name 'net' [ 39.680463] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:58 Registers: info registers vcpu 0 RAX=1ffffffff0bb2584 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff8880146a71c0 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f4bada92900 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=00007f4bacf18df0 CR3=0000000009e6e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a06d02bc24d6c38e00000000000ae988 XMM05=12f52d75e5b31f1f0000000000133120 XMM06=bdf2e299e47b49d50000000000131ba0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff8880166e3680 RSI=ffffffff81718764 RDI=ffff88800e1d62a0 RBP=ffff888016b00910 RSP=ffff888016bc7e78 R8 =0000000000000000 R9 =ffffed1001c3ac54 R10=ffff88800e1d62a3 R11=0000000000000000 R12=0000000000000000 R13=00007f6e738d031c R14=ffff888016b00920 R15=0000000000000040 RIP=ffffffff8171ae02 RFL=00000282 [--S----] 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 00007f6e73533900 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=00007f6e738d031c CR3=000000000c7ac000 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