syzkaller login: [ 54.230905] BUG: Bad rss-counter state mm:000000005a89e507 type:MM_FILEPAGES val:33 [ 54.232398] BUG: Bad rss-counter state mm:000000005a89e507 type:MM_ANONPAGES val:22 [ 54.392832] ================================================================== [ 54.393841] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.394886] Read of size 8 at addr ffff88800e0a9140 by task sshd/220 [ 54.395861] [ 54.396093] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.397025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.398175] Call Trace: [ 54.398540] [ 54.398849] dump_stack_lvl+0x91/0xf0 [ 54.399388] print_report+0xcc/0x620 [ 54.399904] ? __virt_addr_valid+0x102/0x340 [ 54.400512] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.401178] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.401845] kasan_report+0xbe/0xf0 [ 54.402403] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.403064] vma_interval_tree_remove+0xc75/0xec0 [ 54.403716] vma_prepare+0xc54/0x11a0 [ 54.404235] __split_vma+0x5af/0x950 [ 54.404747] ? __pfx___split_vma+0x10/0x10 [ 54.405327] ? find_held_lock+0x2c/0x110 [ 54.405882] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.406533] ? lock_is_held_type+0x9f/0x120 [ 54.407124] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.407806] ? mtree_range_walk+0x632/0x900 [ 54.408415] ? mas_walk+0x5c7/0x7c0 [ 54.408934] do_vmi_munmap+0x1f1/0x2b0 [ 54.409487] mmap_region+0x1f9/0x2660 [ 54.410021] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.410601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.411399] ? __pfx_lock_acquire+0x10/0x10 [ 54.411970] ? __pfx_mmap_region+0x10/0x10 [ 54.412561] ? security_mmap_addr+0x7d/0xa0 [ 54.413136] ? get_unmapped_area+0x1f5/0x3f0 [ 54.413751] do_mmap+0x854/0xf00 [ 54.414256] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.414802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.415436] ksys_mmap_pgoff+0x3af/0x500 [ 54.415986] do_syscall_64+0x3f/0x90 [ 54.416510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.417206] RIP: 0033:0x7fd6a2036d82 [ 54.417719] 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 [ 54.420061] RSP: 002b:00007ffe0b675138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.421057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6a2036d82 [ 54.422010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6a1470000 [ 54.422929] RBP: 00007fd6a1470000 R08: 0000000000000009 R09: 0000000000001000 [ 54.423834] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3a7e15f70 [ 54.424747] R13: 00007ffe0b675150 R14: 00007ffe0b675180 R15: 00007ffe0b6754e0 [ 54.425656] [ 54.425976] [ 54.426210] Allocated by task 213: [ 54.426662] kasan_save_stack+0x22/0x50 [ 54.427202] kasan_set_track+0x25/0x30 [ 54.427731] __kasan_slab_alloc+0x59/0x70 [ 54.428290] kmem_cache_alloc+0x16b/0x370 [ 54.428843] vm_area_dup+0x20/0x160 [ 54.429335] __split_vma+0x170/0x950 [ 54.429841] split_vma+0xc6/0x110 [ 54.430334] mprotect_fixup+0x8d2/0xb30 [ 54.430882] do_mprotect_pkey+0x87e/0xd40 [ 54.431446] __x64_sys_mprotect+0x78/0xc0 [ 54.432004] do_syscall_64+0x3f/0x90 [ 54.432517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.433213] [ 54.433445] Freed by task 213: [ 54.433873] kasan_save_stack+0x22/0x50 [ 54.434433] kasan_set_track+0x25/0x30 [ 54.434971] kasan_save_free_info+0x2b/0x50 [ 54.435548] __kasan_slab_free+0x10a/0x190 [ 54.436210] kmem_cache_free+0x10d/0x4d0 [ 54.436760] rcu_core+0x8c8/0x2860 [ 54.437245] __do_softirq+0x1b7/0x7d4 [ 54.437760] [ 54.438006] Last potentially related work creation: [ 54.438647] kasan_save_stack+0x22/0x50 [ 54.439197] __kasan_record_aux_stack+0x8e/0xa0 [ 54.439821] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.440516] remove_vma+0x139/0x170 [ 54.441013] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.441625] do_vmi_munmap+0x1f1/0x2b0 [ 54.442159] __vm_munmap+0x138/0x3a0 [ 54.442669] __x64_sys_munmap+0x59/0x80 [ 54.443208] do_syscall_64+0x3f/0x90 [ 54.443756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.444448] [ 54.444680] The buggy address belongs to the object at ffff88800e0a90e8 [ 54.444680] which belongs to the cache vm_area_struct of size 168 [ 54.446289] The buggy address is located 88 bytes inside of [ 54.446289] freed 168-byte region [ffff88800e0a90e8, ffff88800e0a9190) [ 54.447796] [ 54.448027] The buggy address belongs to the physical page: [ 54.448736] page:0000000033a474a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0a9 [ 54.449918] memcg:ffff88800fe6b401 [ 54.450386] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 54.451142] page_type: 0xffffffff() [ 54.451628] raw: 0100000000000200 ffff88800879fc80 ffffea0000668100 dead000000000007 [ 54.452620] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe6b401 [ 54.453596] page dumped because: kasan: bad access detected [ 54.454318] [ 54.454554] Memory state around the buggy address: [ 54.455174] ffff88800e0a9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.456106] ffff88800e0a9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 54.457032] >ffff88800e0a9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.457965] ^ [ 54.458654] ffff88800e0a9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 54.459574] ffff88800e0a9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 54.460487] ================================================================== [ 54.461575] Disabling lock debugging due to kernel taint [ 56.675351] BUG: Bad rss-counter state mm:0000000075159369 type:MM_FILEPAGES val:33 [ 56.676911] BUG: Bad rss-counter state mm:0000000075159369 type:MM_ANONPAGES val:22 [ 57.153796] BUG: Bad rss-counter state mm:000000003b213908 type:MM_FILEPAGES val:33 [ 57.154973] BUG: Bad rss-counter state mm:000000003b213908 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65253' (ECDSA) to the list of known hosts. 2023/06/19 11:21:27 fuzzer started 2023/06/19 11:21:27 dialing manager at localhost:44161 2023/06/19 11:21:27 checking machine... 2023/06/19 11:21:27 checking revisions... [ 57.845541] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:21:27 testing simple program... [ 57.876800] cgroup: Unknown subsys name 'net' [ 57.921166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:21:11 Registers: info registers vcpu 0 RAX=1ffffffff0a92574 RBX=ffffffff85d3d010 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff849051e0 RDI=ffffffff87f31700 RBP=ffffffff87f31700 RSP=ffff88800f63fca8 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000004 R11=00000000000b6996 R12=ffffffff87f31700 R13=0000000000000000 R14=ffffffff87b67200 R15=ffff8880196a0650 RIP=ffffffff812c198e 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 00007f0686e89900 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=00007fbdd6b5cba0 CR3=000000000e446000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f068743e650 CR3=000000000fbfa000 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=2036323a31323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000