syzkaller login: [ 31.166142] BUG: Bad rss-counter state mm:000000008839cf40 type:MM_FILEPAGES val:33 [ 31.168363] BUG: Bad rss-counter state mm:000000008839cf40 type:MM_ANONPAGES val:22 [ 31.325662] ================================================================== [ 31.326721] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.327770] Read of size 8 at addr ffff88800e8394e0 by task sshd/221 [ 31.328637] [ 31.328884] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.329844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.330968] Call Trace: [ 31.331327] [ 31.331648] dump_stack_lvl+0x91/0xf0 [ 31.332203] print_report+0xcc/0x620 [ 31.332749] ? __virt_addr_valid+0x102/0x340 [ 31.333383] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.334050] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.334773] kasan_report+0xbe/0xf0 [ 31.335319] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336022] vma_interval_tree_remove+0xc75/0xec0 [ 31.336718] vma_prepare+0xc54/0x11a0 [ 31.337272] __split_vma+0x5af/0x950 [ 31.337825] ? __pfx___split_vma+0x10/0x10 [ 31.338440] ? find_held_lock+0x2c/0x110 [ 31.339062] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.339717] ? lock_is_held_type+0x9f/0x120 [ 31.340346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.341052] ? mtree_range_walk+0x632/0x900 [ 31.341690] ? mas_walk+0x5c7/0x7c0 [ 31.342242] do_vmi_munmap+0x1f1/0x2b0 [ 31.342825] mmap_region+0x1f9/0x2660 [ 31.343388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.343994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.344822] ? __pfx_lock_acquire+0x10/0x10 [ 31.345438] ? __pfx_mmap_region+0x10/0x10 [ 31.346057] ? security_mmap_addr+0x7d/0xa0 [ 31.346693] ? get_unmapped_area+0x1f5/0x3f0 [ 31.347330] do_mmap+0x854/0xf00 [ 31.347839] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.348419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.349078] ksys_mmap_pgoff+0x3af/0x500 [ 31.349664] do_syscall_64+0x3f/0x90 [ 31.350219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350992] RIP: 0033:0x7fb972a1ad82 [ 31.351522] 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 [ 31.353999] RSP: 002b:00007ffff2962a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.355080] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb972a1ad82 [ 31.356080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb971e54000 [ 31.357061] RBP: 00007fb971e54000 R08: 0000000000000009 R09: 0000000000001000 [ 31.358043] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605e10deb20 [ 31.359049] R13: 00007ffff2962a90 R14: 00007ffff2962ac0 R15: 00007ffff2962e20 [ 31.360162] [ 31.360495] [ 31.360753] Allocated by task 214: [ 31.361253] kasan_save_stack+0x22/0x50 [ 31.361830] kasan_set_track+0x25/0x30 [ 31.362404] __kasan_slab_alloc+0x59/0x70 [ 31.363017] kmem_cache_alloc+0x16b/0x370 [ 31.363623] vm_area_dup+0x20/0x160 [ 31.364141] __split_vma+0x170/0x950 [ 31.364665] split_vma+0xc6/0x110 [ 31.365172] mprotect_fixup+0x8d2/0xb30 [ 31.365749] do_mprotect_pkey+0x87e/0xd40 [ 31.366350] __x64_sys_mprotect+0x78/0xc0 [ 31.366967] do_syscall_64+0x3f/0x90 [ 31.367522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368266] [ 31.368516] Freed by task 214: [ 31.368974] kasan_save_stack+0x22/0x50 [ 31.369555] kasan_set_track+0x25/0x30 [ 31.370127] kasan_save_free_info+0x2b/0x50 [ 31.370746] __kasan_slab_free+0x10a/0x190 [ 31.371350] kmem_cache_free+0x10d/0x4d0 [ 31.371944] rcu_core+0x8c8/0x2860 [ 31.372463] __do_softirq+0x1b7/0x7d4 [ 31.373019] [ 31.373271] Last potentially related work creation: [ 31.373952] kasan_save_stack+0x22/0x50 [ 31.374541] __kasan_record_aux_stack+0x8e/0xa0 [ 31.375228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.375975] remove_vma+0x139/0x170 [ 31.376495] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.377143] do_vmi_munmap+0x1f1/0x2b0 [ 31.377705] __vm_munmap+0x138/0x3a0 [ 31.378248] __x64_sys_munmap+0x59/0x80 [ 31.378840] do_syscall_64+0x3f/0x90 [ 31.379384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380125] [ 31.380375] Second to last potentially related work creation: [ 31.381170] kasan_save_stack+0x22/0x50 [ 31.381755] __kasan_record_aux_stack+0x8e/0xa0 [ 31.382420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.383186] remove_vma+0x139/0x170 [ 31.383708] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.384358] do_vmi_munmap+0x1f1/0x2b0 [ 31.384921] mmap_region+0x1f9/0x2660 [ 31.385472] do_mmap+0x854/0xf00 [ 31.385967] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.386534] ksys_mmap_pgoff+0x3af/0x500 [ 31.387122] do_syscall_64+0x3f/0x90 [ 31.387674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388421] [ 31.388675] The buggy address belongs to the object at ffff88800e839488 [ 31.388675] which belongs to the cache vm_area_struct of size 168 [ 31.390382] The buggy address is located 88 bytes inside of [ 31.390382] freed 168-byte region [ffff88800e839488, ffff88800e839530) [ 31.392031] [ 31.392280] The buggy address belongs to the physical page: [ 31.393027] page:0000000030e33a7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe839 [ 31.394275] memcg:ffff888016b1d901 [ 31.394786] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.395530] page_type: 0xffffffff() [ 31.396049] raw: 0100000000000200 ffff88800879fc80 ffffea0000313280 dead000000000006 [ 31.397110] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b1d901 [ 31.398147] page dumped because: kasan: bad access detected [ 31.398931] [ 31.399182] Memory state around the buggy address: [ 31.399863] ffff88800e839380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.400862] ffff88800e839400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.401856] >ffff88800e839480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.402856] ^ [ 31.403733] ffff88800e839500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.404723] ffff88800e839580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.405699] ================================================================== [ 31.406833] Disabling lock debugging due to kernel taint [ 33.493729] BUG: Bad rss-counter state mm:00000000c30a2eeb type:MM_FILEPAGES val:33 [ 33.494944] BUG: Bad rss-counter state mm:00000000c30a2eeb type:MM_ANONPAGES val:22 [ 33.899137] BUG: Bad rss-counter state mm:000000009c7959ee type:MM_FILEPAGES val:33 [ 33.900121] BUG: Bad rss-counter state mm:000000009c7959ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8831' (ECDSA) to the list of known hosts. 2023/06/19 14:08:02 fuzzer started 2023/06/19 14:08:02 dialing manager at localhost:44161 2023/06/19 14:08:02 checking machine... 2023/06/19 14:08:02 checking revisions... [ 34.629222] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:08:02 testing simple program... [ 34.666823] cgroup: Unknown subsys name 'net' [ 34.706417] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:08:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe92fae6f8 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=00007f4ac19565100000563bf79cf790 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=0000000000000000 RBX=00000000000000a4 RCX=0000000000000000 RDX=ffff888018d23680 RSI=ffff888008f960a3 RDI=ffff888008f96000 RBP=ffff888008f960a4 RSP=ffff88801bdb7870 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000000a4 R11=0000000000000000 R12=ffff888008f96000 R13=0000000000000001 R14=ffff888008f960a3 R15=ffff8880167b0a00 RIP=ffffffff814c02f4 RFL=00000293 [--S-A-C] 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 00007f3fb3ea7900 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=00007f3fb445e618 CR3=000000000e61a000 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=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