syzkaller login: [ 47.682901] BUG: Bad rss-counter state mm:0000000083410dde type:MM_FILEPAGES val:33 [ 47.684111] BUG: Bad rss-counter state mm:0000000083410dde type:MM_ANONPAGES val:22 [ 47.826071] ================================================================== [ 47.826976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.827928] Read of size 8 at addr ffff888013e15df0 by task sshd/220 [ 47.828699] [ 47.829060] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.829931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.830896] Call Trace: [ 47.831239] [ 47.831531] dump_stack_lvl+0x91/0xf0 [ 47.832037] print_report+0xcc/0x620 [ 47.832524] ? __virt_addr_valid+0x102/0x340 [ 47.833077] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.833690] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.834299] kasan_report+0xbe/0xf0 [ 47.834773] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.835394] vma_interval_tree_remove+0xc75/0xec0 [ 47.835996] vma_prepare+0xc54/0x11a0 [ 47.836481] __split_vma+0x5af/0x950 [ 47.836956] ? __pfx___split_vma+0x10/0x10 [ 47.837487] ? find_held_lock+0x2c/0x110 [ 47.838016] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.838579] ? lock_is_held_type+0x9f/0x120 [ 47.839112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.839737] ? mtree_range_walk+0x632/0x900 [ 47.840282] ? mas_walk+0x5c7/0x7c0 [ 47.840750] do_vmi_munmap+0x1f1/0x2b0 [ 47.841242] mmap_region+0x1f9/0x2660 [ 47.841723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.842227] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.842939] ? __pfx_lock_acquire+0x10/0x10 [ 47.843472] ? __pfx_mmap_region+0x10/0x10 [ 47.843995] ? security_mmap_addr+0x7d/0xa0 [ 47.844519] ? get_unmapped_area+0x1f5/0x3f0 [ 47.845063] do_mmap+0x854/0xf00 [ 47.845503] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.846002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.846557] ksys_mmap_pgoff+0x3af/0x500 [ 47.847063] do_syscall_64+0x3f/0x90 [ 47.847547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.848183] RIP: 0033:0x7efc23c87d82 [ 47.848639] 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 [ 47.850736] RSP: 002b:00007ffca0268fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.851647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc23c87d82 [ 47.852483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc230c1000 [ 47.853312] RBP: 00007efc230c1000 R08: 0000000000000009 R09: 0000000000001000 [ 47.854145] R10: 0000000000000812 R11: 0000000000000206 R12: 000055938e024ec0 [ 47.854984] R13: 00007ffca0268fc0 R14: 00007ffca0268ff0 R15: 00007ffca0269350 [ 47.855837] [ 47.856128] [ 47.856341] Allocated by task 212: [ 47.856768] kasan_save_stack+0x22/0x50 [ 47.857270] kasan_set_track+0x25/0x30 [ 47.857761] __kasan_slab_alloc+0x59/0x70 [ 47.858283] kmem_cache_alloc+0x16b/0x370 [ 47.858790] vm_area_dup+0x20/0x160 [ 47.859247] __split_vma+0x170/0x950 [ 47.859712] split_vma+0xc6/0x110 [ 47.860150] mprotect_fixup+0x8d2/0xb30 [ 47.860649] do_mprotect_pkey+0x87e/0xd40 [ 47.861163] __x64_sys_mprotect+0x78/0xc0 [ 47.861681] do_syscall_64+0x3f/0x90 [ 47.862150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.862782] [ 47.862995] Freed by task 212: [ 47.863409] kasan_save_stack+0x22/0x50 [ 47.863907] kasan_set_track+0x25/0x30 [ 47.864396] kasan_save_free_info+0x2b/0x50 [ 47.864920] __kasan_slab_free+0x10a/0x190 [ 47.865450] kmem_cache_free+0x10d/0x4d0 [ 47.865954] rcu_core+0x8c8/0x2860 [ 47.866394] __do_softirq+0x1b7/0x7d4 [ 47.866866] [ 47.867078] Last potentially related work creation: [ 47.867665] kasan_save_stack+0x22/0x50 [ 47.868171] __kasan_record_aux_stack+0x8e/0xa0 [ 47.868745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.869386] remove_vma+0x139/0x170 [ 47.869906] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.870457] do_vmi_munmap+0x1f1/0x2b0 [ 47.870943] __vm_munmap+0x138/0x3a0 [ 47.871427] __x64_sys_munmap+0x59/0x80 [ 47.871922] do_syscall_64+0x3f/0x90 [ 47.872392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.873030] [ 47.873245] The buggy address belongs to the object at ffff888013e15d98 [ 47.873245] which belongs to the cache vm_area_struct of size 168 [ 47.874704] The buggy address is located 88 bytes inside of [ 47.874704] freed 168-byte region [ffff888013e15d98, ffff888013e15e40) [ 47.876095] [ 47.876311] The buggy address belongs to the physical page: [ 47.876967] page:00000000c79c7d92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13e15 [ 47.878050] memcg:ffff888013f3cc01 [ 47.878473] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.879177] page_type: 0xffffffff() [ 47.879625] raw: 0100000000000200 ffff88800879fc80 ffffea0000592b40 dead000000000005 [ 47.880528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f3cc01 [ 47.881424] page dumped because: kasan: bad access detected [ 47.882078] [ 47.882291] Memory state around the buggy address: [ 47.882878] ffff888013e15c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 47.883736] ffff888013e15d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 47.884586] >ffff888013e15d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.885428] ^ [ 47.886232] ffff888013e15e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.887078] ffff888013e15e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.887940] ================================================================== [ 47.888862] Disabling lock debugging due to kernel taint [ 49.726416] BUG: Bad rss-counter state mm:000000002291fbb8 type:MM_FILEPAGES val:33 [ 49.728073] BUG: Bad rss-counter state mm:000000002291fbb8 type:MM_ANONPAGES val:22 [ 50.220309] BUG: Bad rss-counter state mm:00000000594cb2e9 type:MM_FILEPAGES val:33 [ 50.221316] BUG: Bad rss-counter state mm:00000000594cb2e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54168' (ECDSA) to the list of known hosts. 2023/06/20 05:38:33 fuzzer started 2023/06/20 05:38:33 dialing manager at localhost:44161 2023/06/20 05:38:33 checking machine... 2023/06/20 05:38:33 checking revisions... [ 50.939881] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:38:33 testing simple program... [ 50.974531] cgroup: Unknown subsys name 'net' [ 51.010792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:38:24 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000029b03054 RCX=ffff88806c4182a0 RDX=000000000000000b RSI=0000000000000001 RDI=00000000e9bc64e4 RBP=ffff88800c8cea00 RSP=ffff888016b074e0 R8 =0000000001fe938d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff888016b07568 R15=000000000000000b RIP=ffffffff82270f13 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 00007f21c7526900 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=00007f21c7add618 CR3=00000000182f8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800844f780 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016abf601 RSI=ffff888016abf690 RDI=ffff888016abf690 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff888016abf690 R15=ffff88806cf09a50 RIP=ffffffff81131236 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 00007f6a6e111900 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=00007f6a6e0fd768 CR3=000000000c594000 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=0000000000000000000000ff00000000 XMM01=000000ffffffffffffffff00ffffffff XMM02=0034312e325f4342494c4700332e325f XMM03=000000000000000000000000002e325f XMM04=494c470034312e325f4342494c470033 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=637469775300000073656c000073696e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000