syzkaller login: [ 31.328507] BUG: Bad rss-counter state mm:000000006396e45b type:MM_FILEPAGES val:33 [ 31.329769] BUG: Bad rss-counter state mm:000000006396e45b type:MM_ANONPAGES val:22 [ 31.367662] ================================================================== [ 31.368645] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.369572] Read of size 8 at addr ffff88801a30a3f8 by task sshd/220 [ 31.370372] [ 31.370593] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.371453] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.372417] Call Trace: [ 31.372737] [ 31.373028] dump_stack_lvl+0x91/0xf0 [ 31.373521] print_report+0xcc/0x620 [ 31.374021] ? __virt_addr_valid+0x102/0x340 [ 31.374579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375816] kasan_report+0xbe/0xf0 [ 31.376298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376922] vma_interval_tree_remove+0xc75/0xec0 [ 31.377524] vma_prepare+0xc54/0x11a0 [ 31.378016] __split_vma+0x5af/0x950 [ 31.378500] ? __pfx___split_vma+0x10/0x10 [ 31.379027] ? find_held_lock+0x2c/0x110 [ 31.379555] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.380118] ? lock_is_held_type+0x9f/0x120 [ 31.380658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.381266] ? mtree_range_walk+0x632/0x900 [ 31.381843] ? mas_walk+0x5c7/0x7c0 [ 31.382321] do_vmi_munmap+0x1f1/0x2b0 [ 31.382815] mmap_region+0x1f9/0x2660 [ 31.383300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.383807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.384518] ? __pfx_lock_acquire+0x10/0x10 [ 31.385066] ? __pfx_mmap_region+0x10/0x10 [ 31.385602] ? security_mmap_addr+0x7d/0xa0 [ 31.386137] ? get_unmapped_area+0x1f5/0x3f0 [ 31.386688] do_mmap+0x854/0xf00 [ 31.387134] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.387630] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.388194] ksys_mmap_pgoff+0x3af/0x500 [ 31.388706] do_syscall_64+0x3f/0x90 [ 31.389183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389843] RIP: 0033:0x7f24cd10dd82 [ 31.390301] 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 [ 31.392439] RSP: 002b:00007ffd205c8f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.393354] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24cd10dd82 [ 31.394275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24cc547000 [ 31.395237] RBP: 00007f24cc547000 R08: 0000000000000009 R09: 0000000000001000 [ 31.396082] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f50e5baec0 [ 31.396947] R13: 00007ffd205c8fa0 R14: 00007ffd205c8fd0 R15: 00007ffd205c9330 [ 31.397826] [ 31.398113] [ 31.398332] Allocated by task 213: [ 31.398766] kasan_save_stack+0x22/0x50 [ 31.399282] kasan_set_track+0x25/0x30 [ 31.399784] __kasan_slab_alloc+0x59/0x70 [ 31.400305] kmem_cache_alloc+0x16b/0x370 [ 31.400819] vm_area_dup+0x20/0x160 [ 31.401275] __split_vma+0x170/0x950 [ 31.401757] split_vma+0xc6/0x110 [ 31.402201] mprotect_fixup+0x8d2/0xb30 [ 31.402700] do_mprotect_pkey+0x87e/0xd40 [ 31.403225] __x64_sys_mprotect+0x78/0xc0 [ 31.403744] do_syscall_64+0x3f/0x90 [ 31.404220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404856] [ 31.405068] Freed by task 213: [ 31.405465] kasan_save_stack+0x22/0x50 [ 31.405972] kasan_set_track+0x25/0x30 [ 31.406468] kasan_save_free_info+0x2b/0x50 [ 31.406999] __kasan_slab_free+0x10a/0x190 [ 31.407532] kmem_cache_free+0x10d/0x4d0 [ 31.408045] rcu_core+0x8c8/0x2860 [ 31.408487] __do_softirq+0x1b7/0x7d4 [ 31.408960] [ 31.409173] Last potentially related work creation: [ 31.409772] kasan_save_stack+0x22/0x50 [ 31.410274] __kasan_record_aux_stack+0x8e/0xa0 [ 31.410840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.411481] remove_vma+0x139/0x170 [ 31.411936] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.412491] do_vmi_munmap+0x1f1/0x2b0 [ 31.412973] __vm_munmap+0x138/0x3a0 [ 31.413448] __x64_sys_munmap+0x59/0x80 [ 31.413956] do_syscall_64+0x3f/0x90 [ 31.414431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415069] [ 31.415286] The buggy address belongs to the object at ffff88801a30a3a0 [ 31.415286] which belongs to the cache vm_area_struct of size 168 [ 31.416742] The buggy address is located 88 bytes inside of [ 31.416742] freed 168-byte region [ffff88801a30a3a0, ffff88801a30a448) [ 31.418196] [ 31.418417] The buggy address belongs to the physical page: [ 31.419074] page:00000000a21f47e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a30a [ 31.420178] memcg:ffff888010011901 [ 31.420608] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.421268] page_type: 0xffffffff() [ 31.421736] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.422665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010011901 [ 31.423581] page dumped because: kasan: bad access detected [ 31.424250] [ 31.424467] Memory state around the buggy address: [ 31.425052] ffff88801a30a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.425905] ffff88801a30a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.426757] >ffff88801a30a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.427601] ^ [ 31.428449] ffff88801a30a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.429306] ffff88801a30a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.430169] ================================================================== [ 31.431242] Disabling lock debugging due to kernel taint [ 33.284442] BUG: Bad rss-counter state mm:0000000066e3cfb9 type:MM_FILEPAGES val:33 [ 33.285586] BUG: Bad rss-counter state mm:0000000066e3cfb9 type:MM_ANONPAGES val:22 [ 33.794223] BUG: Bad rss-counter state mm:00000000fbf5fb90 type:MM_FILEPAGES val:33 [ 33.795374] BUG: Bad rss-counter state mm:00000000fbf5fb90 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42827' (ECDSA) to the list of known hosts. 2023/06/19 21:37:31 fuzzer started 2023/06/19 21:37:31 dialing manager at localhost:44161 2023/06/19 21:37:31 checking machine... 2023/06/19 21:37:31 checking revisions... [ 34.512322] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:37:32 testing simple program... [ 34.567774] cgroup: Unknown subsys name 'net' [ 34.627732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:37:30 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=00007f7bb82b5b40 CR3=000000000d9d6000 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=05208db06f5a7f969a42e203d461056e XMM02=ec2efd57dc4c00df000000000011cbf0 XMM03=004921abc3a14384000000000011ccc0 XMM04=c6bebf805bfd5c4300000000000ae988 XMM05=80e88b65e38aa91c00000000001341a8 XMM06=4fda316b135da52b0000000000133ba0 XMM07=e042d86d42eb936e0000000000124380 XMM08=004921abc3a14384000000000011ccc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000e902 RBX=000000000000e902 RCX=0000000000000000 RDX=ffff888019e33680 RSI=ffffffff813cb626 RDI=0000000000000006 RBP=ffff88806cf2b988 RSP=ffff88806cf09ed8 R8 =0000000000000006 R9 =7fffffffffffffff R10=00000007d149361f R11=ffff88806cf09ff8 R12=00000007d149361f R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=0000000000000003 RIP=ffffffff813cb62c RFL=00000046 [---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 00007f69915be900 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=00007f699159d020 CR3=000000000c6cc000 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=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