syzkaller login: [ 32.723124] BUG: Bad rss-counter state mm:000000006d4cb20b type:MM_FILEPAGES val:33 [ 32.724336] BUG: Bad rss-counter state mm:000000006d4cb20b type:MM_ANONPAGES val:22 [ 32.867603] ================================================================== [ 32.868522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.869488] Read of size 8 at addr ffff888017f19ed8 by task sshd/221 [ 32.870266] [ 32.870488] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.871573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.872542] Call Trace: [ 32.872887] [ 32.873172] dump_stack_lvl+0x91/0xf0 [ 32.873664] print_report+0xcc/0x620 [ 32.874148] ? __virt_addr_valid+0x102/0x340 [ 32.874702] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.875330] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.875951] kasan_report+0xbe/0xf0 [ 32.876427] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.877060] vma_interval_tree_remove+0xc75/0xec0 [ 32.877672] vma_prepare+0xc54/0x11a0 [ 32.878155] __split_vma+0x5af/0x950 [ 32.878633] ? __pfx___split_vma+0x10/0x10 [ 32.879165] ? find_held_lock+0x2c/0x110 [ 32.879687] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.880264] ? lock_is_held_type+0x9f/0x120 [ 32.880813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.881432] ? mtree_range_walk+0x632/0x900 [ 32.881995] ? mas_walk+0x5c7/0x7c0 [ 32.882475] do_vmi_munmap+0x1f1/0x2b0 [ 32.882972] mmap_region+0x1f9/0x2660 [ 32.883454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.883965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.884687] ? __pfx_lock_acquire+0x10/0x10 [ 32.885242] ? __pfx_mmap_region+0x10/0x10 [ 32.885775] ? security_mmap_addr+0x7d/0xa0 [ 32.886315] ? get_unmapped_area+0x1f5/0x3f0 [ 32.886865] do_mmap+0x854/0xf00 [ 32.887304] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.887803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.888373] ksys_mmap_pgoff+0x3af/0x500 [ 32.888888] do_syscall_64+0x3f/0x90 [ 32.889367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.890014] RIP: 0033:0x7f912c1f1d82 [ 32.890473] 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 [ 32.892606] RSP: 002b:00007ffc97d20af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.893519] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f912c1f1d82 [ 32.894381] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f912b62b000 [ 32.895234] RBP: 00007f912b62b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.896083] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c13c63f70 [ 32.896956] R13: 00007ffc97d20b10 R14: 00007ffc97d20b40 R15: 00007ffc97d20ea0 [ 32.897810] [ 32.898105] [ 32.898327] Allocated by task 214: [ 32.898759] kasan_save_stack+0x22/0x50 [ 32.899270] kasan_set_track+0x25/0x30 [ 32.899771] __kasan_slab_alloc+0x59/0x70 [ 32.900298] kmem_cache_alloc+0x16b/0x370 [ 32.900826] vm_area_dup+0x20/0x160 [ 32.901285] __split_vma+0x170/0x950 [ 32.901756] split_vma+0xc6/0x110 [ 32.902199] mprotect_fixup+0x8d2/0xb30 [ 32.902701] do_mprotect_pkey+0x87e/0xd40 [ 32.903219] __x64_sys_mprotect+0x78/0xc0 [ 32.903751] do_syscall_64+0x3f/0x90 [ 32.904225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.904881] [ 32.905097] Freed by task 214: [ 32.905502] kasan_save_stack+0x22/0x50 [ 32.906009] kasan_set_track+0x25/0x30 [ 32.906502] kasan_save_free_info+0x2b/0x50 [ 32.907041] __kasan_slab_free+0x10a/0x190 [ 32.907576] kmem_cache_free+0x10d/0x4d0 [ 32.908098] rcu_core+0x8c8/0x2860 [ 32.908546] __do_softirq+0x1b7/0x7d4 [ 32.909054] [ 32.909272] Last potentially related work creation: [ 32.909859] kasan_save_stack+0x22/0x50 [ 32.910362] __kasan_record_aux_stack+0x8e/0xa0 [ 32.910937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.911581] remove_vma+0x139/0x170 [ 32.912035] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.912595] do_vmi_munmap+0x1f1/0x2b0 [ 32.913091] __vm_munmap+0x138/0x3a0 [ 32.913558] __x64_sys_munmap+0x59/0x80 [ 32.914054] do_syscall_64+0x3f/0x90 [ 32.914529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.915173] [ 32.915391] The buggy address belongs to the object at ffff888017f19e80 [ 32.915391] which belongs to the cache vm_area_struct of size 168 [ 32.916868] The buggy address is located 88 bytes inside of [ 32.916868] freed 168-byte region [ffff888017f19e80, ffff888017f19f28) [ 32.918271] [ 32.918486] The buggy address belongs to the physical page: [ 32.919149] page:000000004f8f8e9d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f19 [ 32.920240] memcg:ffff88801871ef01 [ 32.920666] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.921321] page_type: 0xffffffff() [ 32.921771] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.922689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801871ef01 [ 32.923592] page dumped because: kasan: bad access detected [ 32.924256] [ 32.924469] Memory state around the buggy address: [ 32.925071] ffff888017f19d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.925927] ffff888017f19e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.926779] >ffff888017f19e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.927630] ^ [ 32.928358] ffff888017f19f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.929227] ffff888017f19f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.930079] ================================================================== [ 32.931089] Disabling lock debugging due to kernel taint [ 35.025633] BUG: Bad rss-counter state mm:000000000e5ba92b type:MM_FILEPAGES val:33 [ 35.026615] BUG: Bad rss-counter state mm:000000000e5ba92b type:MM_ANONPAGES val:22 [ 35.447087] BUG: Bad rss-counter state mm:00000000abc28f2f type:MM_FILEPAGES val:33 [ 35.448251] BUG: Bad rss-counter state mm:00000000abc28f2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44659' (ECDSA) to the list of known hosts. 2023/06/19 19:22:05 fuzzer started 2023/06/19 19:22:05 dialing manager at localhost:44161 2023/06/19 19:22:05 checking machine... 2023/06/19 19:22:05 checking revisions... [ 36.187145] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:22:05 testing simple program... [ 36.239589] cgroup: Unknown subsys name 'net' [ 36.295939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:03 Registers: info registers vcpu 0 RAX=000000000003de00 RBX=000000000003de20 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=ffff8880103175f0 RSP=ffff888010317530 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000246 R15=ffff88806ce3de00 RIP=ffffffff81806c82 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 00007f6584f0c900 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=000055ebd47292a8 CR3=000000000d800000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f81a9717f164c87800000000000ae988 XMM05=474a6b59ae639fc90000000000134f28 XMM06=c291bd5c70af25b90000000000133fc8 XMM07=fb795ef6d65770560000000000124538 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007fad8b400338 CR3=0000000005482000 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=00007fad8b8ee5100000556a8511c790 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