syzkaller login: [ 30.602539] BUG: Bad rss-counter state mm:000000005c3cc991 type:MM_FILEPAGES val:33 [ 30.603832] BUG: Bad rss-counter state mm:000000005c3cc991 type:MM_ANONPAGES val:22 [ 30.761966] ================================================================== [ 30.762947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.763926] Read of size 8 at addr ffff888015dec968 by task sshd/220 [ 30.764784] [ 30.765012] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.766119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.767162] Call Trace: [ 30.767497] [ 30.767860] dump_stack_lvl+0x91/0xf0 [ 30.768463] print_report+0xcc/0x620 [ 30.769044] ? __virt_addr_valid+0x102/0x340 [ 30.769699] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770436] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771165] kasan_report+0xbe/0xf0 [ 30.771743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772493] vma_interval_tree_remove+0xc75/0xec0 [ 30.773250] vma_prepare+0xc54/0x11a0 [ 30.773745] __split_vma+0x5af/0x950 [ 30.774217] ? __pfx___split_vma+0x10/0x10 [ 30.774746] ? find_held_lock+0x2c/0x110 [ 30.775263] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.775831] ? lock_is_held_type+0x9f/0x120 [ 30.776371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.776982] ? mtree_range_walk+0x632/0x900 [ 30.777535] ? mas_walk+0x5c7/0x7c0 [ 30.778007] do_vmi_munmap+0x1f1/0x2b0 [ 30.778503] mmap_region+0x1f9/0x2660 [ 30.778986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.779504] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.780211] ? __pfx_lock_acquire+0x10/0x10 [ 30.780762] ? __pfx_mmap_region+0x10/0x10 [ 30.781293] ? security_mmap_addr+0x7d/0xa0 [ 30.781821] ? get_unmapped_area+0x1f5/0x3f0 [ 30.782368] do_mmap+0x854/0xf00 [ 30.782804] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.783297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.783848] ksys_mmap_pgoff+0x3af/0x500 [ 30.784367] do_syscall_64+0x3f/0x90 [ 30.784846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785502] RIP: 0033:0x7fa66ed81d82 [ 30.785958] 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 [ 30.788100] RSP: 002b:00007fff97c50358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.789029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa66ed81d82 [ 30.789895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa66e1bb000 [ 30.790758] RBP: 00007fa66e1bb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.791630] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cfb2ead90 [ 30.792501] R13: 00007fff97c50370 R14: 00007fff97c503a0 R15: 00007fff97c50700 [ 30.793374] [ 30.793670] [ 30.793894] Allocated by task 213: [ 30.794322] kasan_save_stack+0x22/0x50 [ 30.794823] kasan_set_track+0x25/0x30 [ 30.795319] __kasan_slab_alloc+0x59/0x70 [ 30.795852] kmem_cache_alloc+0x16b/0x370 [ 30.796379] vm_area_dup+0x20/0x160 [ 30.796855] __split_vma+0x170/0x950 [ 30.797324] split_vma+0xc6/0x110 [ 30.797777] mprotect_fixup+0x8d2/0xb30 [ 30.798291] do_mprotect_pkey+0x87e/0xd40 [ 30.798820] __x64_sys_mprotect+0x78/0xc0 [ 30.799358] do_syscall_64+0x3f/0x90 [ 30.799835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800478] [ 30.800721] Freed by task 213: [ 30.801110] kasan_save_stack+0x22/0x50 [ 30.801620] kasan_set_track+0x25/0x30 [ 30.802118] kasan_save_free_info+0x2b/0x50 [ 30.802655] __kasan_slab_free+0x10a/0x190 [ 30.803191] kmem_cache_free+0x10d/0x4d0 [ 30.803704] rcu_core+0x8c8/0x2860 [ 30.804145] __do_softirq+0x1b7/0x7d4 [ 30.804628] [ 30.804842] Last potentially related work creation: [ 30.805423] kasan_save_stack+0x22/0x50 [ 30.805926] __kasan_record_aux_stack+0x8e/0xa0 [ 30.806497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.807215] remove_vma+0x139/0x170 [ 30.807664] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.808215] do_vmi_munmap+0x1f1/0x2b0 [ 30.808721] __vm_munmap+0x138/0x3a0 [ 30.809187] __x64_sys_munmap+0x59/0x80 [ 30.809682] do_syscall_64+0x3f/0x90 [ 30.810155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810799] [ 30.811013] The buggy address belongs to the object at ffff888015dec910 [ 30.811013] which belongs to the cache vm_area_struct of size 168 [ 30.812480] The buggy address is located 88 bytes inside of [ 30.812480] freed 168-byte region [ffff888015dec910, ffff888015dec9b8) [ 30.813889] [ 30.814103] The buggy address belongs to the physical page: [ 30.814761] page:00000000661211e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15dec [ 30.815843] memcg:ffff88800dc98201 [ 30.816267] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.816980] page_type: 0xffffffff() [ 30.817430] raw: 0100000000000200 ffff8880087a0c80 ffffea0000254680 dead000000000003 [ 30.818369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc98201 [ 30.819279] page dumped because: kasan: bad access detected [ 30.819954] [ 30.820167] Memory state around the buggy address: [ 30.820768] ffff888015dec800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.821622] ffff888015dec880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.822493] >ffff888015dec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.823363] ^ [ 30.824149] ffff888015dec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.825032] ffff888015deca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.825887] ================================================================== [ 30.826832] Disabling lock debugging due to kernel taint [ 33.232659] BUG: Bad rss-counter state mm:00000000b1f6a173 type:MM_FILEPAGES val:33 [ 33.233892] BUG: Bad rss-counter state mm:00000000b1f6a173 type:MM_ANONPAGES val:22 [ 33.701780] BUG: Bad rss-counter state mm:000000008c2b67af type:MM_FILEPAGES val:33 [ 33.702793] BUG: Bad rss-counter state mm:000000008c2b67af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4110' (ECDSA) to the list of known hosts. 2023/06/20 18:10:47 fuzzer started 2023/06/20 18:10:47 dialing manager at localhost:36067 2023/06/20 18:10:47 checking machine... 2023/06/20 18:10:47 checking revisions... [ 34.441323] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:10:47 testing simple program... [ 34.490911] cgroup: Unknown subsys name 'net' [ 34.544604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:10:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=000055dbf430fc78 CR3=0000000005482000 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=00007f3c14dd0510000055dbf430d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83633b43 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000007 RBP=00007ffc113f9d08 RSP=ffff88800f12fcb8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000000c R13=000000000000000c R14=ffff88800f12fe10 R15=00007ffc113f9d0c RIP=ffffffff814c0250 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 00007fc32c92e900 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=00007ffc113fb000 CR3=000000001a954000 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