syzkaller login: [ 52.221870] BUG: Bad rss-counter state mm:00000000f12b52b5 type:MM_FILEPAGES val:33 [ 52.223066] BUG: Bad rss-counter state mm:00000000f12b52b5 type:MM_ANONPAGES val:22 [ 52.349380] ================================================================== [ 52.350478] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.351658] Read of size 8 at addr ffff888016aec6b0 by task sshd/227 [ 52.352758] [ 52.353025] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.354059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.355261] Call Trace: [ 52.355605] [ 52.355905] dump_stack_lvl+0x91/0xf0 [ 52.356430] print_report+0xcc/0x620 [ 52.356963] ? __virt_addr_valid+0x102/0x340 [ 52.357545] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.358200] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.358856] kasan_report+0xbe/0xf0 [ 52.359362] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.360015] vma_interval_tree_remove+0xc75/0xec0 [ 52.360666] vma_prepare+0xc54/0x11a0 [ 52.361178] __split_vma+0x5af/0x950 [ 52.361681] ? __pfx___split_vma+0x10/0x10 [ 52.362241] ? find_held_lock+0x2c/0x110 [ 52.362808] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.363414] ? lock_is_held_type+0x9f/0x120 [ 52.363986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.364668] ? mtree_range_walk+0x632/0x900 [ 52.365262] ? mas_walk+0x5c7/0x7c0 [ 52.365762] do_vmi_munmap+0x1f1/0x2b0 [ 52.366287] mmap_region+0x1f9/0x2660 [ 52.366807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.367351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.368120] ? __pfx_lock_acquire+0x10/0x10 [ 52.368713] ? __pfx_mmap_region+0x10/0x10 [ 52.369274] ? security_mmap_addr+0x7d/0xa0 [ 52.369845] ? get_unmapped_area+0x1f5/0x3f0 [ 52.370439] do_mmap+0x854/0xf00 [ 52.370906] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.371428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.372023] ksys_mmap_pgoff+0x3af/0x500 [ 52.372592] do_syscall_64+0x3f/0x90 [ 52.373105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.373796] RIP: 0033:0x7fd0ac0d4d82 [ 52.374290] 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 [ 52.376579] RSP: 002b:00007ffdcc8719a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.377543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0ac0d4d82 [ 52.378460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0ab50e000 [ 52.379363] RBP: 00007fd0ab50e000 R08: 0000000000000009 R09: 0000000000001000 [ 52.380278] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b091540ec0 [ 52.381189] R13: 00007ffdcc8719c0 R14: 00007ffdcc8719f0 R15: 00007ffdcc871d50 [ 52.382107] [ 52.382427] [ 52.382659] Allocated by task 220: [ 52.383118] kasan_save_stack+0x22/0x50 [ 52.383651] kasan_set_track+0x25/0x30 [ 52.384181] __kasan_slab_alloc+0x59/0x70 [ 52.384760] kmem_cache_alloc+0x16b/0x370 [ 52.385310] vm_area_dup+0x20/0x160 [ 52.385792] __split_vma+0x170/0x950 [ 52.386301] split_vma+0xc6/0x110 [ 52.386776] mprotect_fixup+0x8d2/0xb30 [ 52.387307] do_mprotect_pkey+0x87e/0xd40 [ 52.387865] __x64_sys_mprotect+0x78/0xc0 [ 52.388436] do_syscall_64+0x3f/0x90 [ 52.388957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.389640] [ 52.389867] Freed by task 220: [ 52.390283] kasan_save_stack+0x22/0x50 [ 52.390821] kasan_set_track+0x25/0x30 [ 52.391348] kasan_save_free_info+0x2b/0x50 [ 52.391917] __kasan_slab_free+0x10a/0x190 [ 52.392494] kmem_cache_free+0x10d/0x4d0 [ 52.393062] rcu_core+0x8c8/0x2860 [ 52.393536] __do_softirq+0x1b7/0x7d4 [ 52.394108] [ 52.394346] Last potentially related work creation: [ 52.394976] kasan_save_stack+0x22/0x50 [ 52.395517] __kasan_record_aux_stack+0x8e/0xa0 [ 52.396130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.396835] remove_vma+0x139/0x170 [ 52.397317] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.397917] do_vmi_munmap+0x1f1/0x2b0 [ 52.398443] __vm_munmap+0x138/0x3a0 [ 52.398944] __x64_sys_munmap+0x59/0x80 [ 52.399474] do_syscall_64+0x3f/0x90 [ 52.399982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.400680] [ 52.400909] The buggy address belongs to the object at ffff888016aec658 [ 52.400909] which belongs to the cache vm_area_struct of size 168 [ 52.402488] The buggy address is located 88 bytes inside of [ 52.402488] freed 168-byte region [ffff888016aec658, ffff888016aec700) [ 52.403997] [ 52.404226] The buggy address belongs to the physical page: [ 52.404945] page:00000000589f41d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aec [ 52.406115] memcg:ffff88800d0d3801 [ 52.406575] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.407265] page_type: 0xffffffff() [ 52.407753] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.408752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0d3801 [ 52.409728] page dumped because: kasan: bad access detected [ 52.410446] [ 52.410673] Memory state around the buggy address: [ 52.411292] ffff888016aec580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.412223] ffff888016aec600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 52.413135] >ffff888016aec680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.414057] ^ [ 52.414679] ffff888016aec700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.415592] ffff888016aec780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 52.416500] ================================================================== [ 52.417674] Disabling lock debugging due to kernel taint [ 54.767978] BUG: Bad rss-counter state mm:0000000027827c49 type:MM_FILEPAGES val:33 [ 54.769198] BUG: Bad rss-counter state mm:0000000027827c49 type:MM_ANONPAGES val:22 [ 55.231608] BUG: Bad rss-counter state mm:000000003fb5b07a type:MM_FILEPAGES val:33 [ 55.232783] BUG: Bad rss-counter state mm:000000003fb5b07a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11083' (ECDSA) to the list of known hosts. 2023/06/19 14:50:37 fuzzer started 2023/06/19 14:50:38 dialing manager at localhost:44161 2023/06/19 14:50:38 checking machine... 2023/06/19 14:50:38 checking revisions... [ 55.867955] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:50:38 testing simple program... [ 55.934086] cgroup: Unknown subsys name 'net' [ 55.981794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:16 Registers: info registers vcpu 0 RAX=ffff88800eafd000 RBX=ffff88800f5fac48 RCX=1ffff11001ca9686 RDX=dffffc0000000000 RSI=ffff88800e97d000 RDI=ffff88800f5fac78 RBP=ffff88800e54b400 RSP=ffff8880181774b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e97c000 R13=0000000000000000 R14=ffff88800e145048 R15=ffff88800e145000 RIP=ffffffff81847508 RFL=00000046 [---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 00007fbe28869900 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=00007fbe28e20618 CR3=000000000d97c000 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=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=00007f195a326aa0 CR3=000000000d7c0000 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=4f1c61e60d7651b13840f1b88eb9fefb XMM02=000000000011de08ec2efd57dc4c00df XMM03=0000000000124760c5ca5347753d6622 XMM04=beb548d81c9c6f4800000000000ae988 XMM05=16bbfc4fa606b62500000000001342f0 XMM06=cb74132249a5d4000000000000133158 XMM07=e042d86d42eb936e00000000001249e0 XMM08=c5ca5347753d6622000000000011de68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000