syzkaller login: [ 39.217923] BUG: Bad rss-counter state mm:00000000cd9bb04b type:MM_FILEPAGES val:33 [ 39.219099] BUG: Bad rss-counter state mm:00000000cd9bb04b type:MM_ANONPAGES val:22 [ 39.261126] ================================================================== [ 39.262350] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.263518] Read of size 8 at addr ffff88800f1c0df0 by task sshd/218 [ 39.264414] [ 39.264677] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.265701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.266878] Call Trace: [ 39.267259] [ 39.267554] dump_stack_lvl+0x91/0xf0 [ 39.268046] print_report+0xcc/0x620 [ 39.268533] ? __virt_addr_valid+0x102/0x340 [ 39.269106] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.269742] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.270373] kasan_report+0xbe/0xf0 [ 39.270844] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.271466] vma_interval_tree_remove+0xc75/0xec0 [ 39.272069] vma_prepare+0xc54/0x11a0 [ 39.272547] __split_vma+0x5af/0x950 [ 39.273029] ? __pfx___split_vma+0x10/0x10 [ 39.273567] ? find_held_lock+0x2c/0x110 [ 39.274087] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.274670] ? lock_is_held_type+0x9f/0x120 [ 39.275209] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.275818] ? mtree_range_walk+0x632/0x900 [ 39.276373] ? mas_walk+0x5c7/0x7c0 [ 39.276849] do_vmi_munmap+0x1f1/0x2b0 [ 39.277344] mmap_region+0x1f9/0x2660 [ 39.277821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.278350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.279068] ? __pfx_lock_acquire+0x10/0x10 [ 39.279598] ? __pfx_mmap_region+0x10/0x10 [ 39.280134] ? security_mmap_addr+0x7d/0xa0 [ 39.280658] ? get_unmapped_area+0x1f5/0x3f0 [ 39.281205] do_mmap+0x854/0xf00 [ 39.281649] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.282149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.282733] ksys_mmap_pgoff+0x3af/0x500 [ 39.283245] do_syscall_64+0x3f/0x90 [ 39.283724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.284372] RIP: 0033:0x7fa8dcf92d82 [ 39.284835] 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 [ 39.286973] RSP: 002b:00007ffe00476298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.287877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8dcf92d82 [ 39.288719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8dc3cc000 [ 39.289566] RBP: 00007fa8dc3cc000 R08: 0000000000000009 R09: 0000000000001000 [ 39.290424] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ececa56d90 [ 39.291278] R13: 00007ffe004762b0 R14: 00007ffe004762e0 R15: 00007ffe00476640 [ 39.292135] [ 39.292428] [ 39.292641] Allocated by task 211: [ 39.293070] kasan_save_stack+0x22/0x50 [ 39.293579] kasan_set_track+0x25/0x30 [ 39.294080] __kasan_slab_alloc+0x59/0x70 [ 39.294621] kmem_cache_alloc+0x16b/0x370 [ 39.295145] vm_area_dup+0x20/0x160 [ 39.295604] __split_vma+0x170/0x950 [ 39.296075] split_vma+0xc6/0x110 [ 39.296522] mprotect_fixup+0x8d2/0xb30 [ 39.297022] do_mprotect_pkey+0x87e/0xd40 [ 39.297545] __x64_sys_mprotect+0x78/0xc0 [ 39.298069] do_syscall_64+0x3f/0x90 [ 39.298546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.299191] [ 39.299410] Freed by task 211: [ 39.299802] kasan_save_stack+0x22/0x50 [ 39.300304] kasan_set_track+0x25/0x30 [ 39.300796] kasan_save_free_info+0x2b/0x50 [ 39.301338] __kasan_slab_free+0x10a/0x190 [ 39.301875] kmem_cache_free+0x10d/0x4d0 [ 39.302408] rcu_core+0x8c8/0x2860 [ 39.302943] __do_softirq+0x1b7/0x7d4 [ 39.303427] [ 39.303641] Last potentially related work creation: [ 39.304233] kasan_save_stack+0x22/0x50 [ 39.304737] __kasan_record_aux_stack+0x8e/0xa0 [ 39.305310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.305961] remove_vma+0x139/0x170 [ 39.306430] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.306991] do_vmi_munmap+0x1f1/0x2b0 [ 39.307488] __vm_munmap+0x138/0x3a0 [ 39.307957] __x64_sys_munmap+0x59/0x80 [ 39.308454] do_syscall_64+0x3f/0x90 [ 39.308934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.309576] [ 39.309794] The buggy address belongs to the object at ffff88800f1c0d98 [ 39.309794] which belongs to the cache vm_area_struct of size 168 [ 39.311268] The buggy address is located 88 bytes inside of [ 39.311268] freed 168-byte region [ffff88800f1c0d98, ffff88800f1c0e40) [ 39.312659] [ 39.312877] The buggy address belongs to the physical page: [ 39.313550] page:000000001cb57396 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1c0 [ 39.314644] memcg:ffff888009a3cb01 [ 39.315076] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.315722] page_type: 0xffffffff() [ 39.316169] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.317087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a3cb01 [ 39.317996] page dumped because: kasan: bad access detected [ 39.318664] [ 39.318882] Memory state around the buggy address: [ 39.319464] ffff88800f1c0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.320328] ffff88800f1c0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.321180] >ffff88800f1c0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.322033] ^ [ 39.322850] ffff88800f1c0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.323710] ffff88800f1c0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.324568] ================================================================== [ 39.325537] Disabling lock debugging due to kernel taint [ 41.668116] BUG: Bad rss-counter state mm:00000000f4242dcd type:MM_FILEPAGES val:33 [ 41.669196] BUG: Bad rss-counter state mm:00000000f4242dcd type:MM_ANONPAGES val:22 [ 42.138696] BUG: Bad rss-counter state mm:00000000fa92bcf2 type:MM_FILEPAGES val:33 [ 42.139704] BUG: Bad rss-counter state mm:00000000fa92bcf2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39136' (ECDSA) to the list of known hosts. 2023/06/20 06:46:10 fuzzer started 2023/06/20 06:46:10 dialing manager at localhost:44161 2023/06/20 06:46:10 checking machine... 2023/06/20 06:46:10 checking revisions... [ 42.907335] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:46:10 testing simple program... [ 42.954387] cgroup: Unknown subsys name 'net' [ 42.991906] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:45:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000000000011ea38 RCX=00005577c2432450 RDX=00005577c242a490 RSI=00007ffc4d111538 RDI=00005577c242a2a0 RBP=00007ffc4d1115d8 RSP=00007ffc4d111500 R8 =0000000000000001 R9 =000000000011ea38 R10=0000000000000002 R11=00007f77368f35e0 R12=00007f77368db9c8 R13=0000000000000001 R14=000000000011ea38 R15=0000000000000000 RIP=00007f7737f55350 RFL=00000206 [-----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 00007f77373d2900 00000000 00000000 GS =0000 0000000000000000 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=00007f773684c010 CR3=0000000009720000 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=7e8a42789393c4b7000000000011e6f8 XMM01=c5059efebef3aa8efb46f6d5f8b89fa1 XMM02=2c67c8bc2e329bc3000000000011ea38 XMM03=fb795ef6d65770560000000000125128 XMM04=b4a95e4446df251a00000000000ae988 XMM05=e906d0b4dd9042c40000000000135e98 XMM06=bdf2e299e47b49d50000000000134bc8 XMM07=e042d86d42eb936e0000000000125400 XMM08=6f45d2e43a36dba0000000000011ea98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f61f158 RCX=ffff88800f61f1f8 RDX=1ffff11001ec3e36 RSI=ffff88800f61f1f0 RDI=ffffffff813ad6d0 RBP=ffff88800f61f1b0 RSP=ffff88800f61f140 R8 =0000000000000001 R9 =ffff88800f61f198 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f61f220 R13=0000000000000000 R14=ffff88800fe5b680 R15=ffff88800f963260 RIP=ffffffff81130399 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 00007feb3b71e900 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=00007feb3b6fd020 CR3=000000001b6ca000 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