syzkaller login: [ 30.319417] BUG: Bad rss-counter state mm:0000000022107864 type:MM_FILEPAGES val:33 [ 30.320753] BUG: Bad rss-counter state mm:0000000022107864 type:MM_ANONPAGES val:22 [ 30.348760] ================================================================== [ 30.349598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.350505] Read of size 8 at addr ffff88800f0315c8 by task sshd/221 [ 30.351129] [ 30.351351] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.352127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.352969] Call Trace: [ 30.353296] [ 30.353519] dump_stack_lvl+0x91/0xf0 [ 30.353899] print_report+0xcc/0x620 [ 30.354381] ? __virt_addr_valid+0x102/0x340 [ 30.354817] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355296] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355780] kasan_report+0xbe/0xf0 [ 30.356148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.356624] vma_interval_tree_remove+0xc75/0xec0 [ 30.357093] vma_prepare+0xc54/0x11a0 [ 30.357458] __split_vma+0x5af/0x950 [ 30.357823] ? __pfx___split_vma+0x10/0x10 [ 30.358239] ? find_held_lock+0x2c/0x110 [ 30.358645] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.359083] ? lock_is_held_type+0x9f/0x120 [ 30.359497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.359990] ? mtree_range_walk+0x632/0x900 [ 30.360415] ? mas_walk+0x5c7/0x7c0 [ 30.360722] do_vmi_munmap+0x1f1/0x2b0 [ 30.361009] mmap_region+0x1f9/0x2660 [ 30.361300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.361602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.362028] ? __pfx_lock_acquire+0x10/0x10 [ 30.362341] ? __pfx_mmap_region+0x10/0x10 [ 30.362652] ? security_mmap_addr+0x7d/0xa0 [ 30.362960] ? get_unmapped_area+0x1f5/0x3f0 [ 30.363289] do_mmap+0x854/0xf00 [ 30.363549] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.363849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.364168] ksys_mmap_pgoff+0x3af/0x500 [ 30.364471] do_syscall_64+0x3f/0x90 [ 30.364756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365147] RIP: 0033:0x7fdca55dbd82 [ 30.365414] 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 [ 30.366683] RSP: 002b:00007ffe9dfef0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.367217] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdca55dbd82 [ 30.367726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdca4a15000 [ 30.368237] RBP: 00007fdca4a15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.368724] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bb6c84b20 [ 30.369184] R13: 00007ffe9dfef0f0 R14: 00007ffe9dfef120 R15: 00007ffe9dfef480 [ 30.369659] [ 30.369822] [ 30.369940] Allocated by task 214: [ 30.370176] kasan_save_stack+0x22/0x50 [ 30.370452] kasan_set_track+0x25/0x30 [ 30.370732] __kasan_slab_alloc+0x59/0x70 [ 30.371017] kmem_cache_alloc+0x16b/0x370 [ 30.371298] vm_area_dup+0x20/0x160 [ 30.371544] __split_vma+0x170/0x950 [ 30.371807] split_vma+0xc6/0x110 [ 30.372047] mprotect_fixup+0x8d2/0xb30 [ 30.372321] do_mprotect_pkey+0x87e/0xd40 [ 30.372601] __x64_sys_mprotect+0x78/0xc0 [ 30.372882] do_syscall_64+0x3f/0x90 [ 30.373143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.373492] [ 30.373610] Freed by task 214: [ 30.373828] kasan_save_stack+0x22/0x50 [ 30.374101] kasan_set_track+0x25/0x30 [ 30.374372] kasan_save_free_info+0x2b/0x50 [ 30.374660] __kasan_slab_free+0x10a/0x190 [ 30.374955] kmem_cache_free+0x10d/0x4d0 [ 30.375233] rcu_core+0x8c8/0x2860 [ 30.375479] __do_softirq+0x1b7/0x7d4 [ 30.375750] [ 30.375870] Last potentially related work creation: [ 30.376185] kasan_save_stack+0x22/0x50 [ 30.376453] __kasan_record_aux_stack+0x8e/0xa0 [ 30.376773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.377121] remove_vma+0x139/0x170 [ 30.377376] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.377686] do_vmi_munmap+0x1f1/0x2b0 [ 30.377954] __vm_munmap+0x138/0x3a0 [ 30.378207] __x64_sys_munmap+0x59/0x80 [ 30.378668] do_syscall_64+0x3f/0x90 [ 30.378955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379307] [ 30.379424] The buggy address belongs to the object at ffff88800f031570 [ 30.379424] which belongs to the cache vm_area_struct of size 168 [ 30.380246] The buggy address is located 88 bytes inside of [ 30.380246] freed 168-byte region [ffff88800f031570, ffff88800f031618) [ 30.381033] [ 30.381155] The buggy address belongs to the physical page: [ 30.381518] page:0000000083694af8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf031 [ 30.382104] memcg:ffff88800e1d0d01 [ 30.382337] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.382690] page_type: 0xffffffff() [ 30.382945] raw: 0100000000000200 ffff88800879fc80 ffffea000025f240 dead000000000002 [ 30.383436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d0d01 [ 30.383933] page dumped because: kasan: bad access detected [ 30.384300] [ 30.384417] Memory state around the buggy address: [ 30.384736] ffff88800f031480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.385195] ffff88800f031500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.385664] >ffff88800f031580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.386127] ^ [ 30.386491] ffff88800f031600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.386966] ffff88800f031680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.387429] ================================================================== [ 30.387945] Disabling lock debugging due to kernel taint [ 32.360009] BUG: Bad rss-counter state mm:0000000052ce179c type:MM_FILEPAGES val:33 [ 32.361238] BUG: Bad rss-counter state mm:0000000052ce179c type:MM_ANONPAGES val:22 [ 32.887863] BUG: Bad rss-counter state mm:00000000c529dcf3 type:MM_FILEPAGES val:33 [ 32.889055] BUG: Bad rss-counter state mm:00000000c529dcf3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42026' (ECDSA) to the list of known hosts. 2023/06/19 22:51:10 fuzzer started 2023/06/19 22:51:10 dialing manager at localhost:44161 2023/06/19 22:51:10 checking machine... 2023/06/19 22:51:10 checking revisions... [ 33.523026] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:51:11 testing simple program... [ 33.567574] cgroup: Unknown subsys name 'net' [ 33.605832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:10 Registers: info registers vcpu 0 RAX=1ffff11001cde9b5 RBX=ffff88800e6f4d78 RCX=1ffff11001c10f90 RDX=dffffc0000000000 RSI=ffff888017760e00 RDI=ffff88800e6f4da8 RBP=ffff88800f6409f8 RSP=ffff88800d9af7b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888017760c00 R13=0000000000000000 R14=ffff888009a1be88 R15=ffff888009a1be40 RIP=ffffffff818474fe 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 00007efd7ef75900 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=00007efd7f52a650 CR3=000000001be58000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00005598ca9dc000 CR3=0000000016904000 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=2030313a31353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a31353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000