syzkaller login: [ 29.170486] BUG: Bad rss-counter state mm:0000000075dee743 type:MM_FILEPAGES val:33 [ 29.172376] BUG: Bad rss-counter state mm:0000000075dee743 type:MM_ANONPAGES val:22 [ 29.338527] ================================================================== [ 29.339529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.340600] Read of size 8 at addr ffff88800eb48df0 by task sshd/219 [ 29.341567] [ 29.341810] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.342754] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.343845] Call Trace: [ 29.344206] [ 29.344518] dump_stack_lvl+0x91/0xf0 [ 29.345058] print_report+0xcc/0x620 [ 29.345601] ? __virt_addr_valid+0x102/0x340 [ 29.346204] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.346892] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.347567] kasan_report+0xbe/0xf0 [ 29.348091] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.348785] vma_interval_tree_remove+0xc75/0xec0 [ 29.349478] vma_prepare+0xc54/0x11a0 [ 29.350022] __split_vma+0x5af/0x950 [ 29.350539] ? __pfx___split_vma+0x10/0x10 [ 29.351068] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 29.351714] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.352272] ? lock_is_held_type+0x9f/0x120 [ 29.352807] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.353422] ? mtree_range_walk+0x632/0x900 [ 29.353979] ? mas_walk+0x5c7/0x7c0 [ 29.354456] do_vmi_munmap+0x1f1/0x2b0 [ 29.354956] mmap_region+0x1f9/0x2660 [ 29.355430] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.355937] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.356647] ? __pfx_lock_acquire+0x10/0x10 [ 29.357169] ? __pfx_mmap_region+0x10/0x10 [ 29.357708] ? security_mmap_addr+0x7d/0xa0 [ 29.358233] ? get_unmapped_area+0x1f5/0x3f0 [ 29.358782] do_mmap+0x854/0xf00 [ 29.359215] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.359705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.360260] ksys_mmap_pgoff+0x3af/0x500 [ 29.360769] do_syscall_64+0x3f/0x90 [ 29.361243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.361897] RIP: 0033:0x7f59e4b41d82 [ 29.362353] 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 [ 29.364774] RSP: 002b:00007fff71f46178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.365829] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59e4b41d82 [ 29.366793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59e3f7b000 [ 29.367758] RBP: 00007f59e3f7b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.368724] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ba4a43b20 [ 29.369713] R13: 00007fff71f46190 R14: 00007fff71f461c0 R15: 00007fff71f46520 [ 29.370690] [ 29.371024] [ 29.371266] Allocated by task 212: [ 29.371714] kasan_save_stack+0x22/0x50 [ 29.372210] kasan_set_track+0x25/0x30 [ 29.372703] __kasan_slab_alloc+0x59/0x70 [ 29.373216] kmem_cache_alloc+0x16b/0x370 [ 29.373731] vm_area_dup+0x20/0x160 [ 29.374180] __split_vma+0x170/0x950 [ 29.374644] split_vma+0xc6/0x110 [ 29.375080] mprotect_fixup+0x8d2/0xb30 [ 29.375588] do_mprotect_pkey+0x87e/0xd40 [ 29.376104] __x64_sys_mprotect+0x78/0xc0 [ 29.376618] do_syscall_64+0x3f/0x90 [ 29.377086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.377744] [ 29.377958] Freed by task 212: [ 29.378343] kasan_save_stack+0x22/0x50 [ 29.378838] kasan_set_track+0x25/0x30 [ 29.379326] kasan_save_free_info+0x2b/0x50 [ 29.379851] __kasan_slab_free+0x10a/0x190 [ 29.380385] kmem_cache_free+0x10d/0x4d0 [ 29.380884] rcu_core+0x8c8/0x2860 [ 29.381336] __do_softirq+0x1b7/0x7d4 [ 29.381815] [ 29.382031] Last potentially related work creation: [ 29.382615] kasan_save_stack+0x22/0x50 [ 29.383113] __kasan_record_aux_stack+0x8e/0xa0 [ 29.383684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.384329] remove_vma+0x139/0x170 [ 29.384775] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.385343] do_vmi_munmap+0x1f1/0x2b0 [ 29.385828] __vm_munmap+0x138/0x3a0 [ 29.386289] __x64_sys_munmap+0x59/0x80 [ 29.386783] do_syscall_64+0x3f/0x90 [ 29.387258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.387893] [ 29.388108] Second to last potentially related work creation: [ 29.388779] kasan_save_stack+0x22/0x50 [ 29.389276] __kasan_record_aux_stack+0x8e/0xa0 [ 29.389863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.390497] remove_vma+0x139/0x170 [ 29.390940] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.391492] do_vmi_munmap+0x1f1/0x2b0 [ 29.391971] mmap_region+0x1f9/0x2660 [ 29.392448] do_mmap+0x854/0xf00 [ 29.392875] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.393366] ksys_mmap_pgoff+0x3af/0x500 [ 29.393867] do_syscall_64+0x3f/0x90 [ 29.394339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.394974] [ 29.395191] The buggy address belongs to the object at ffff88800eb48d98 [ 29.395191] which belongs to the cache vm_area_struct of size 168 [ 29.396648] The buggy address is located 88 bytes inside of [ 29.396648] freed 168-byte region [ffff88800eb48d98, ffff88800eb48e40) [ 29.398061] [ 29.398276] The buggy address belongs to the physical page: [ 29.398930] page:000000009a88cba0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb48 [ 29.400003] memcg:ffff88800dc93d01 [ 29.400426] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.401119] page_type: 0xffffffff() [ 29.401577] raw: 0100000000000200 ffff8880087a0c80 ffffea0000397b00 dead000000000007 [ 29.402485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc93d01 [ 29.403390] page dumped because: kasan: bad access detected [ 29.404042] [ 29.404255] Memory state around the buggy address: [ 29.404832] ffff88800eb48c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.405722] ffff88800eb48d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.406573] >ffff88800eb48d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.407411] ^ [ 29.408206] ffff88800eb48e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.409050] ffff88800eb48e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.409905] ================================================================== [ 29.411381] Disabling lock debugging due to kernel taint [ 31.096123] BUG: Bad rss-counter state mm:000000003f126ea8 type:MM_FILEPAGES val:33 [ 31.096912] BUG: Bad rss-counter state mm:000000003f126ea8 type:MM_ANONPAGES val:22 [ 31.520835] BUG: Bad rss-counter state mm:000000005e5bad8e type:MM_FILEPAGES val:33 [ 31.521635] BUG: Bad rss-counter state mm:000000005e5bad8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33636' (ECDSA) to the list of known hosts. 2023/06/21 00:25:19 fuzzer started 2023/06/21 00:25:19 dialing manager at localhost:36067 2023/06/21 00:25:19 checking machine... 2023/06/21 00:25:19 checking revisions... [ 32.215426] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:25:19 testing simple program... [ 32.267885] cgroup: Unknown subsys name 'net' [ 32.346634] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:25:19 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=00007ffecfc6a9f8 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=00007f33a052951000005578f7c22790 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=0000000000000000 RCX=0000000000000000 RDX=ffff888010290000 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019d7f800 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff813744b0 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 00007fd182900900 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=00007ffff0e85000 CR3=000000000fd7a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000