syzkaller login: [ 32.268604] BUG: Bad rss-counter state mm:000000002604ba2b type:MM_FILEPAGES val:33 [ 32.269951] BUG: Bad rss-counter state mm:000000002604ba2b type:MM_ANONPAGES val:22 [ 32.441198] ================================================================== [ 32.442150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.443137] Read of size 8 at addr ffff88801a211c20 by task sshd/220 [ 32.444060] [ 32.444293] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.445200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.446245] Call Trace: [ 32.446589] [ 32.446891] dump_stack_lvl+0x91/0xf0 [ 32.447403] print_report+0xcc/0x620 [ 32.447921] ? __virt_addr_valid+0x102/0x340 [ 32.448516] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.449164] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.449808] kasan_report+0xbe/0xf0 [ 32.450308] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.450979] vma_interval_tree_remove+0xc75/0xec0 [ 32.451638] vma_prepare+0xc54/0x11a0 [ 32.452146] __split_vma+0x5af/0x950 [ 32.452643] ? __pfx___split_vma+0x10/0x10 [ 32.453199] ? find_held_lock+0x2c/0x110 [ 32.453747] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.454342] ? lock_is_held_type+0x9f/0x120 [ 32.454916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.455558] ? mtree_range_walk+0x632/0x900 [ 32.456158] ? mas_walk+0x5c7/0x7c0 [ 32.456660] do_vmi_munmap+0x1f1/0x2b0 [ 32.457188] mmap_region+0x1f9/0x2660 [ 32.457701] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.458249] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.459009] ? __pfx_lock_acquire+0x10/0x10 [ 32.459572] ? __pfx_mmap_region+0x10/0x10 [ 32.460163] ? security_mmap_addr+0x7d/0xa0 [ 32.460730] ? get_unmapped_area+0x1f5/0x3f0 [ 32.461319] do_mmap+0x854/0xf00 [ 32.461790] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.462312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.462912] ksys_mmap_pgoff+0x3af/0x500 [ 32.463458] do_syscall_64+0x3f/0x90 [ 32.463969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.464653] RIP: 0033:0x7f6c41366d82 [ 32.465133] 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 [ 32.467409] RSP: 002b:00007ffc99022f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.468395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c41366d82 [ 32.469300] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c407a0000 [ 32.470192] RBP: 00007f6c407a0000 R08: 0000000000000009 R09: 0000000000001000 [ 32.471085] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651816b9ec0 [ 32.471991] R13: 00007ffc99022f20 R14: 00007ffc99022f50 R15: 00007ffc990232b0 [ 32.472906] [ 32.473218] [ 32.473451] Allocated by task 213: [ 32.473907] kasan_save_stack+0x22/0x50 [ 32.474445] kasan_set_track+0x25/0x30 [ 32.474971] __kasan_slab_alloc+0x59/0x70 [ 32.475531] kmem_cache_alloc+0x16b/0x370 [ 32.476092] vm_area_dup+0x20/0x160 [ 32.476586] __split_vma+0x170/0x950 [ 32.477090] split_vma+0xc6/0x110 [ 32.477561] mprotect_fixup+0x8d2/0xb30 [ 32.478101] do_mprotect_pkey+0x87e/0xd40 [ 32.478662] __x64_sys_mprotect+0x78/0xc0 [ 32.479215] do_syscall_64+0x3f/0x90 [ 32.479742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.480427] [ 32.480656] Freed by task 213: [ 32.481071] kasan_save_stack+0x22/0x50 [ 32.481612] kasan_set_track+0x25/0x30 [ 32.482135] kasan_save_free_info+0x2b/0x50 [ 32.482697] __kasan_slab_free+0x10a/0x190 [ 32.483268] kmem_cache_free+0x10d/0x4d0 [ 32.483822] rcu_core+0x8c8/0x2860 [ 32.484294] __do_softirq+0x1b7/0x7d4 [ 32.484802] [ 32.485028] Last potentially related work creation: [ 32.485653] kasan_save_stack+0x22/0x50 [ 32.486192] __kasan_record_aux_stack+0x8e/0xa0 [ 32.486812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.487505] remove_vma+0x139/0x170 [ 32.487997] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.488583] do_vmi_munmap+0x1f1/0x2b0 [ 32.489103] __vm_munmap+0x138/0x3a0 [ 32.489599] __x64_sys_munmap+0x59/0x80 [ 32.490124] do_syscall_64+0x3f/0x90 [ 32.490632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.491318] [ 32.491551] The buggy address belongs to the object at ffff88801a211bc8 [ 32.491551] which belongs to the cache vm_area_struct of size 168 [ 32.493151] The buggy address is located 88 bytes inside of [ 32.493151] freed 168-byte region [ffff88801a211bc8, ffff88801a211c70) [ 32.494649] [ 32.494884] The buggy address belongs to the physical page: [ 32.495578] page:00000000feab2ce6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a211 [ 32.496783] memcg:ffff888019f95401 [ 32.497241] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.497919] page_type: 0xffffffff() [ 32.498401] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.499383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f95401 [ 32.500356] page dumped because: kasan: bad access detected [ 32.501068] [ 32.501297] Memory state around the buggy address: [ 32.501914] ffff88801a211b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.502820] ffff88801a211b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.503742] >ffff88801a211c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.504651] ^ [ 32.505220] ffff88801a211c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.506137] ffff88801a211d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.507054] ================================================================== [ 32.508132] Disabling lock debugging due to kernel taint [ 34.873281] BUG: Bad rss-counter state mm:00000000009e674f type:MM_FILEPAGES val:33 [ 34.874457] BUG: Bad rss-counter state mm:00000000009e674f type:MM_ANONPAGES val:22 [ 35.257108] BUG: Bad rss-counter state mm:0000000090fd3242 type:MM_FILEPAGES val:33 [ 35.258278] BUG: Bad rss-counter state mm:0000000090fd3242 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36862' (ECDSA) to the list of known hosts. 2023/06/20 04:35:07 fuzzer started 2023/06/20 04:35:07 dialing manager at localhost:44161 2023/06/20 04:35:07 checking machine... 2023/06/20 04:35:07 checking revisions... [ 35.962996] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:35:07 testing simple program... [ 36.013548] cgroup: Unknown subsys name 'net' [ 36.053658] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:35:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800ca49c00 RCX=0000000000000000 RDX=1ffff11001e8f3e6 RSI=ffffffff814d4559 RDI=ffff88806ce3a190 RBP=0000000000000100 RSP=ffff8880143afde8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff8880143afe30 R15=ffffc9000068d000 RIP=ffffffff814d457e RFL=00000286 [--S--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 00007fec9ad25900 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=00007fec9a134430 CR3=000000000d5ce000 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=34280f4dfca344e200000000000ae988 XMM05=ed3918e72bc54a510000000000134b78 XMM06=4fda316b135da52b0000000000133968 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=1ffff1100d9e134e RSI=ffff88806cf09b10 RDI=ffff88806cf09a70 RBP=ffff88806cf09b10 RSP=ffff88806cf09988 R8 =ffffffff86088c1e R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88806cf09ab8 R14=ffff88806cf09b18 R15=ffff88806cf09a70 RIP=ffffffff8113040e 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 00007fb38e7e4900 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=00007ffd4de48000 CR3=0000000014072000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000