syzkaller login: [ 30.067246] BUG: Bad rss-counter state mm:00000000084aa98c type:MM_FILEPAGES val:33 [ 30.068737] BUG: Bad rss-counter state mm:00000000084aa98c type:MM_ANONPAGES val:22 [ 30.227308] ================================================================== [ 30.228233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.229213] Read of size 8 at addr ffff88800cd224e0 by task sshd/221 [ 30.230194] [ 30.230434] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.231306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.232412] Call Trace: [ 30.232766] [ 30.233059] dump_stack_lvl+0x91/0xf0 [ 30.233562] print_report+0xcc/0x620 [ 30.234092] ? __virt_addr_valid+0x102/0x340 [ 30.234703] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.235376] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.236019] kasan_report+0xbe/0xf0 [ 30.236523] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.237195] vma_interval_tree_remove+0xc75/0xec0 [ 30.237884] vma_prepare+0xc54/0x11a0 [ 30.238393] __split_vma+0x5af/0x950 [ 30.238878] ? __pfx___split_vma+0x10/0x10 [ 30.239450] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.240085] ? lock_is_held_type+0x9f/0x120 [ 30.240660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.241266] ? mtree_range_walk+0x632/0x900 [ 30.241872] ? mas_walk+0x5c7/0x7c0 [ 30.242410] do_vmi_munmap+0x1f1/0x2b0 [ 30.242954] mmap_region+0x1f9/0x2660 [ 30.243456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.243964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.244719] ? __pfx_lock_acquire+0x10/0x10 [ 30.245305] ? __pfx_mmap_region+0x10/0x10 [ 30.245875] ? security_mmap_addr+0x7d/0xa0 [ 30.246413] ? get_unmapped_area+0x1f5/0x3f0 [ 30.247008] do_mmap+0x854/0xf00 [ 30.247534] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.248062] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.248649] ksys_mmap_pgoff+0x3af/0x500 [ 30.249181] do_syscall_64+0x3f/0x90 [ 30.249731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250442] RIP: 0033:0x7f6919fd2d82 [ 30.250910] 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 [ 30.253172] RSP: 002b:00007ffcf9b02048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.254116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6919fd2d82 [ 30.255058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f691940c000 [ 30.255960] RBP: 00007f691940c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.256857] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fe3c06980 [ 30.257819] R13: 00007ffcf9b02060 R14: 00007ffcf9b02090 R15: 00007ffcf9b023f0 [ 30.258702] [ 30.259018] [ 30.259235] Allocated by task 214: [ 30.259739] kasan_save_stack+0x22/0x50 [ 30.260288] kasan_set_track+0x25/0x30 [ 30.260798] __kasan_slab_alloc+0x59/0x70 [ 30.261317] kmem_cache_alloc+0x16b/0x370 [ 30.261852] vm_area_dup+0x20/0x160 [ 30.262379] __split_vma+0x170/0x950 [ 30.262862] split_vma+0xc6/0x110 [ 30.263301] mprotect_fixup+0x8d2/0xb30 [ 30.263811] do_mprotect_pkey+0x87e/0xd40 [ 30.264356] __x64_sys_mprotect+0x78/0xc0 [ 30.264957] do_syscall_64+0x3f/0x90 [ 30.265474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.266143] [ 30.266384] Freed by task 214: [ 30.266791] kasan_save_stack+0x22/0x50 [ 30.267362] kasan_set_track+0x25/0x30 [ 30.267877] kasan_save_free_info+0x2b/0x50 [ 30.268429] __kasan_slab_free+0x10a/0x190 [ 30.268989] kmem_cache_free+0x10d/0x4d0 [ 30.269547] rcu_core+0x8c8/0x2860 [ 30.270040] __do_softirq+0x1b7/0x7d4 [ 30.270640] [ 30.270930] Last potentially related work creation: [ 30.271728] kasan_save_stack+0x22/0x50 [ 30.272397] __kasan_record_aux_stack+0x8e/0xa0 [ 30.273152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.274021] remove_vma+0x139/0x170 [ 30.274623] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.275288] do_vmi_munmap+0x1f1/0x2b0 [ 30.275865] __vm_munmap+0x138/0x3a0 [ 30.276364] __x64_sys_munmap+0x59/0x80 [ 30.276961] do_syscall_64+0x3f/0x90 [ 30.277496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278243] [ 30.278475] The buggy address belongs to the object at ffff88800cd22488 [ 30.278475] which belongs to the cache vm_area_struct of size 168 [ 30.280061] The buggy address is located 88 bytes inside of [ 30.280061] freed 168-byte region [ffff88800cd22488, ffff88800cd22530) [ 30.281562] [ 30.281795] The buggy address belongs to the physical page: [ 30.282545] page:00000000ebe8b838 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd22 [ 30.283663] memcg:ffff88801665e501 [ 30.284088] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.284866] page_type: 0xffffffff() [ 30.285320] raw: 0100000000000200 ffff88800879fc80 ffffea00003bf480 dead000000000003 [ 30.286287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801665e501 [ 30.287301] page dumped because: kasan: bad access detected [ 30.288006] [ 30.288221] Memory state around the buggy address: [ 30.288815] ffff88800cd22380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.289778] ffff88800cd22400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.290686] >ffff88800cd22480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.291570] ^ [ 30.292435] ffff88800cd22500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.293296] ffff88800cd22580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.294186] ================================================================== [ 30.295434] Disabling lock debugging due to kernel taint [ 32.348615] BUG: Bad rss-counter state mm:000000004fadd5e7 type:MM_FILEPAGES val:33 [ 32.349796] BUG: Bad rss-counter state mm:000000004fadd5e7 type:MM_ANONPAGES val:22 [ 32.814318] BUG: Bad rss-counter state mm:0000000050aa66df type:MM_FILEPAGES val:33 [ 32.815596] BUG: Bad rss-counter state mm:0000000050aa66df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46649' (ECDSA) to the list of known hosts. 2023/06/19 23:38:59 fuzzer started 2023/06/19 23:38:59 dialing manager at localhost:44161 2023/06/19 23:38:59 checking machine... 2023/06/19 23:38:59 checking revisions... [ 33.451339] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:38:59 testing simple program... [ 33.500652] cgroup: Unknown subsys name 'net' [ 33.541045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:38:57 Registers: info registers vcpu 0 RAX=ffff888008a8bbe8 RBX=ffff8880166f7b20 RCX=0000000000000000 RDX=1ffff11002cdef65 RSI=ffffffff81893070 RDI=ffff888008a8bc78 RBP=ffff888008a8bc78 RSP=ffff8880166f79b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000002 R13=ffff8880166f7b28 R14=ffff8880166f7b58 R15=ffff8880166f7b20 RIP=ffffffff814c07e4 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 00007f4b9447d900 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=00007f4b94a32650 CR3=0000000016790000 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=00007fdfb3cda6c0 CR3=000000000c94a000 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=43dbbfd66470a383bd407b99b2a57aa7 XMM02=2c67c8bc2e329bc3000000000011dcf0 XMM03=fb795ef6d657705600000000001242c0 XMM04=6f2abfe232b0d4d400000000000ae988 XMM05=a50634e1fc9efe940000000000134a78 XMM06=c291bd5c70af25b90000000000133b18 XMM07=e042d86d42eb936e0000000000124540 XMM08=94ae0f0431daf2a4000000000011dd50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000