syzkaller login: [ 34.307304] BUG: Bad rss-counter state mm:00000000ccab50e8 type:MM_FILEPAGES val:33 [ 34.308531] BUG: Bad rss-counter state mm:00000000ccab50e8 type:MM_ANONPAGES val:22 [ 34.350790] ================================================================== [ 34.351766] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.352830] Read of size 8 at addr ffff88800ec644e0 by task sshd/220 [ 34.353611] [ 34.353837] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.354715] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.355716] Call Trace: [ 34.356046] [ 34.356337] dump_stack_lvl+0x91/0xf0 [ 34.356835] print_report+0xcc/0x620 [ 34.357333] ? __virt_addr_valid+0x102/0x340 [ 34.357898] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.358526] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.359166] kasan_report+0xbe/0xf0 [ 34.359651] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.360294] vma_interval_tree_remove+0xc75/0xec0 [ 34.360918] vma_prepare+0xc54/0x11a0 [ 34.361418] __split_vma+0x5af/0x950 [ 34.361909] ? __pfx___split_vma+0x10/0x10 [ 34.362459] ? find_held_lock+0x2c/0x110 [ 34.363002] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.363619] ? lock_is_held_type+0x9f/0x120 [ 34.364184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.364815] ? mtree_range_walk+0x632/0x900 [ 34.365389] ? mas_walk+0x5c7/0x7c0 [ 34.365892] do_vmi_munmap+0x1f1/0x2b0 [ 34.366405] mmap_region+0x1f9/0x2660 [ 34.366913] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.367458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.368202] ? __pfx_lock_acquire+0x10/0x10 [ 34.368757] ? __pfx_mmap_region+0x10/0x10 [ 34.369315] ? security_mmap_addr+0x7d/0xa0 [ 34.369879] ? get_unmapped_area+0x1f5/0x3f0 [ 34.370454] do_mmap+0x854/0xf00 [ 34.370911] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.371477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.372076] ksys_mmap_pgoff+0x3af/0x500 [ 34.372619] do_syscall_64+0x3f/0x90 [ 34.373128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.373803] RIP: 0033:0x7f1f68736d82 [ 34.374290] 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 [ 34.376559] RSP: 002b:00007ffe16439588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.377524] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f68736d82 [ 34.378426] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f67b70000 [ 34.379324] RBP: 00007f1f67b70000 R08: 0000000000000009 R09: 0000000000001000 [ 34.380210] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598c8280ec0 [ 34.381089] R13: 00007ffe164395a0 R14: 00007ffe164395d0 R15: 00007ffe16439930 [ 34.381989] [ 34.382292] [ 34.382513] Allocated by task 213: [ 34.382969] kasan_save_stack+0x22/0x50 [ 34.383516] kasan_set_track+0x25/0x30 [ 34.384041] __kasan_slab_alloc+0x59/0x70 [ 34.384594] kmem_cache_alloc+0x16b/0x370 [ 34.385152] vm_area_dup+0x20/0x160 [ 34.385631] __split_vma+0x170/0x950 [ 34.386115] split_vma+0xc6/0x110 [ 34.386571] mprotect_fixup+0x8d2/0xb30 [ 34.387103] do_mprotect_pkey+0x87e/0xd40 [ 34.387657] __x64_sys_mprotect+0x78/0xc0 [ 34.388206] do_syscall_64+0x3f/0x90 [ 34.388702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.389372] [ 34.389597] Freed by task 213: [ 34.390008] kasan_save_stack+0x22/0x50 [ 34.390537] kasan_set_track+0x25/0x30 [ 34.391060] kasan_save_free_info+0x2b/0x50 [ 34.391611] __kasan_slab_free+0x10a/0x190 [ 34.392170] kmem_cache_free+0x10d/0x4d0 [ 34.392712] rcu_core+0x8c8/0x2860 [ 34.393177] __do_softirq+0x1b7/0x7d4 [ 34.393673] [ 34.393906] Last potentially related work creation: [ 34.394519] kasan_save_stack+0x22/0x50 [ 34.395192] __kasan_record_aux_stack+0x8e/0xa0 [ 34.395817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.396525] remove_vma+0x139/0x170 [ 34.397015] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.397617] do_vmi_munmap+0x1f1/0x2b0 [ 34.398146] __vm_munmap+0x138/0x3a0 [ 34.398652] __x64_sys_munmap+0x59/0x80 [ 34.399195] do_syscall_64+0x3f/0x90 [ 34.399702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.400400] [ 34.400631] Second to last potentially related work creation: [ 34.401370] kasan_save_stack+0x22/0x50 [ 34.401920] __kasan_record_aux_stack+0x8e/0xa0 [ 34.402544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.403255] remove_vma+0x139/0x170 [ 34.403739] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.404337] do_vmi_munmap+0x1f1/0x2b0 [ 34.404858] mmap_region+0x1f9/0x2660 [ 34.405376] do_mmap+0x854/0xf00 [ 34.405836] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.406362] ksys_mmap_pgoff+0x3af/0x500 [ 34.406907] do_syscall_64+0x3f/0x90 [ 34.407433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.408126] [ 34.408352] The buggy address belongs to the object at ffff88800ec64488 [ 34.408352] which belongs to the cache vm_area_struct of size 168 [ 34.409959] The buggy address is located 88 bytes inside of [ 34.409959] freed 168-byte region [ffff88800ec64488, ffff88800ec64530) [ 34.411472] [ 34.411699] The buggy address belongs to the physical page: [ 34.412405] page:0000000036337e9d refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ec64658 pfn:0xec64 [ 34.413722] memcg:ffff88800e136601 [ 34.414177] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.414865] page_type: 0xffffffff() [ 34.415362] raw: 0100000000000200 ffff88800879fc80 ffffea0000386650 ffffea000034f650 [ 34.416356] raw: ffff88800ec64658 0000000000110007 00000001ffffffff ffff88800e136601 [ 34.417333] page dumped because: kasan: bad access detected [ 34.418061] [ 34.418292] Memory state around the buggy address: [ 34.418923] ffff88800ec64380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.419849] ffff88800ec64400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.420761] >ffff88800ec64480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.421696] ^ [ 34.422509] ffff88800ec64500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 34.423447] ffff88800ec64580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.424371] ================================================================== [ 34.426088] Disabling lock debugging due to kernel taint [ 36.901916] BUG: Bad rss-counter state mm:0000000029d9f896 type:MM_FILEPAGES val:33 [ 36.903115] BUG: Bad rss-counter state mm:0000000029d9f896 type:MM_ANONPAGES val:22 [ 37.306762] BUG: Bad rss-counter state mm:000000001fd4962b type:MM_FILEPAGES val:33 [ 37.307990] BUG: Bad rss-counter state mm:000000001fd4962b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39721' (ECDSA) to the list of known hosts. 2023/06/19 17:12:16 fuzzer started 2023/06/19 17:12:16 dialing manager at localhost:44161 2023/06/19 17:12:16 checking machine... 2023/06/19 17:12:16 checking revisions... [ 38.065894] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:12:17 testing simple program... [ 38.118388] cgroup: Unknown subsys name 'net' [ 38.156270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:12:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010203300 RCX=0000000000000001 RDX=0000000000000200 RSI=0000000000000000 RDI=ffffed10020407e0 RBP=0000000000001000 RSP=ffff888018cf7cc8 R8 =ffff888010203300 R9 =0000000000000000 R10=ffffed1002040660 R11=0000000000000000 R12=ffff888010203300 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8450d412 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4c929ae900 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=00007f4c92f63650 CR3=0000000019c74000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0005fe7ea2eb8cc6 RCX=0000000000000000 RDX=00007fffffa8a1b8 RSI=0000000000000000 RDI=000055b0be7ec360 RBP=00007fffffa8a1d0 RSP=00007fffffa8a1b0 R8 =0000000000000000 R9 =00007fffffbc9080 R10=00007fffffbc9080 R11=000000000000f712 R12=00007fffffa8a1c0 R13=00007fffffa8a1b8 R14=0000000000000000 R15=0000000000000000 RIP=000055b0bcf23355 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f56f0847900 00000000 00000000 GS =0000 0000000000000000 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=00007f56efc5ae10 CR3=00000000144bc000 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=7e8a42789393c4b7000000000011cf38 XMM01=e1fcefa04a940db3b84a882ed20c0c99 XMM02=2c67c8bc2e329bc3000000000011d210 XMM03=fb795ef6d65770560000000000124750 XMM04=80aa2e8a40cd62e200000000000ae988 XMM05=6e6acb813d34e3650000000000135ea0 XMM06=c291bd5c70af25b90000000000135538 XMM07=e042d86d42eb936e00000000001249d0 XMM08=b68455e1f7a74586000000000011d270 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000