syzkaller login: [ 30.065479] BUG: Bad rss-counter state mm:00000000b9b9340b type:MM_FILEPAGES val:33 [ 30.066173] BUG: Bad rss-counter state mm:00000000b9b9340b type:MM_ANONPAGES val:22 [ 30.222289] ================================================================== [ 30.223213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.224160] Read of size 8 at addr ffff88801462f968 by task sshd/221 [ 30.224931] [ 30.225146] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.226155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.227148] Call Trace: [ 30.227476] [ 30.227808] dump_stack_lvl+0x91/0xf0 [ 30.228329] print_report+0xcc/0x620 [ 30.228815] ? __virt_addr_valid+0x102/0x340 [ 30.229377] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.229999] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.230613] kasan_report+0xbe/0xf0 [ 30.231091] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231721] vma_interval_tree_remove+0xc75/0xec0 [ 30.232348] vma_prepare+0xc54/0x11a0 [ 30.232827] __split_vma+0x5af/0x950 [ 30.233295] ? __pfx___split_vma+0x10/0x10 [ 30.233833] ? find_held_lock+0x2c/0x110 [ 30.234362] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.234929] ? lock_is_held_type+0x9f/0x120 [ 30.235471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.236074] ? mtree_range_walk+0x632/0x900 [ 30.236639] ? mas_walk+0x5c7/0x7c0 [ 30.237125] do_vmi_munmap+0x1f1/0x2b0 [ 30.237623] mmap_region+0x1f9/0x2660 [ 30.238109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.238626] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.239393] ? __pfx_lock_acquire+0x10/0x10 [ 30.239934] ? __pfx_mmap_region+0x10/0x10 [ 30.240492] ? security_mmap_addr+0x7d/0xa0 [ 30.241043] ? get_unmapped_area+0x1f5/0x3f0 [ 30.241600] do_mmap+0x854/0xf00 [ 30.242044] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.242557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.243138] ksys_mmap_pgoff+0x3af/0x500 [ 30.243662] do_syscall_64+0x3f/0x90 [ 30.244155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.244831] RIP: 0033:0x7f470f0f7d82 [ 30.245313] 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 [ 30.247536] RSP: 002b:00007ffdf22b4cf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.248475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f470f0f7d82 [ 30.249320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f470e531000 [ 30.250187] RBP: 00007f470e531000 R08: 0000000000000009 R09: 0000000000001000 [ 30.251040] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a197b6cec0 [ 30.251891] R13: 00007ffdf22b4d10 R14: 00007ffdf22b4d40 R15: 00007ffdf22b50a0 [ 30.252759] [ 30.253052] [ 30.253270] Allocated by task 214: [ 30.253718] kasan_save_stack+0x22/0x50 [ 30.254230] kasan_set_track+0x25/0x30 [ 30.254725] __kasan_slab_alloc+0x59/0x70 [ 30.255248] kmem_cache_alloc+0x16b/0x370 [ 30.255797] vm_area_dup+0x20/0x160 [ 30.256293] __split_vma+0x170/0x950 [ 30.256759] split_vma+0xc6/0x110 [ 30.257205] mprotect_fixup+0x8d2/0xb30 [ 30.257711] do_mprotect_pkey+0x87e/0xd40 [ 30.258238] __x64_sys_mprotect+0x78/0xc0 [ 30.258762] do_syscall_64+0x3f/0x90 [ 30.259241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.259907] [ 30.260127] Freed by task 19: [ 30.260520] kasan_save_stack+0x22/0x50 [ 30.261028] kasan_set_track+0x25/0x30 [ 30.261528] kasan_save_free_info+0x2b/0x50 [ 30.262064] __kasan_slab_free+0x10a/0x190 [ 30.262605] kmem_cache_free+0x10d/0x4d0 [ 30.263114] rcu_core+0x8c8/0x2860 [ 30.263568] __do_softirq+0x1b7/0x7d4 [ 30.264050] [ 30.264268] Last potentially related work creation: [ 30.264888] kasan_save_stack+0x22/0x50 [ 30.265390] __kasan_record_aux_stack+0x8e/0xa0 [ 30.265976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.266626] remove_vma+0x139/0x170 [ 30.267166] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.267723] do_vmi_munmap+0x1f1/0x2b0 [ 30.268210] __vm_munmap+0x138/0x3a0 [ 30.268698] __x64_sys_munmap+0x59/0x80 [ 30.269202] do_syscall_64+0x3f/0x90 [ 30.269684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.270328] [ 30.270546] The buggy address belongs to the object at ffff88801462f910 [ 30.270546] which belongs to the cache vm_area_struct of size 168 [ 30.272020] The buggy address is located 88 bytes inside of [ 30.272020] freed 168-byte region [ffff88801462f910, ffff88801462f9b8) [ 30.273452] [ 30.273676] The buggy address belongs to the physical page: [ 30.274354] page:0000000030453931 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1462f [ 30.275464] memcg:ffff888019fda401 [ 30.275897] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.276558] page_type: 0xffffffff() [ 30.277009] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.277925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fda401 [ 30.278839] page dumped because: kasan: bad access detected [ 30.279512] [ 30.279732] Memory state around the buggy address: [ 30.280326] ffff88801462f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.281196] ffff88801462f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.282060] >ffff88801462f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.282911] ^ [ 30.283689] ffff88801462f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.284562] ffff88801462fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.285409] ================================================================== [ 30.286407] Disabling lock debugging due to kernel taint [ 32.144960] BUG: Bad rss-counter state mm:000000005108efb4 type:MM_FILEPAGES val:33 [ 32.145833] BUG: Bad rss-counter state mm:000000005108efb4 type:MM_ANONPAGES val:22 [ 32.628540] BUG: Bad rss-counter state mm:00000000901ef4f0 type:MM_FILEPAGES val:33 [ 32.629537] BUG: Bad rss-counter state mm:00000000901ef4f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62267' (ECDSA) to the list of known hosts. 2023/06/20 23:08:18 fuzzer started 2023/06/20 23:08:19 dialing manager at localhost:36067 2023/06/20 23:08:19 checking machine... 2023/06/20 23:08:19 checking revisions... [ 33.358379] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:08:19 testing simple program... [ 33.405907] cgroup: Unknown subsys name 'net' [ 33.464801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:08:18 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000255 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8171b3d3 RBP=ffff88800f1a6000 RSP=ffff8880185bfe70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=00007f629e6fb044 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f629dba7900 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=00007f629e6fb044 CR3=0000000015cae000 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=a7c1fef3b7b75216fa31f3f540abf87e XMM03=638b90d5828f34a5a68499b333e7c75b XMM04=5623b2e749433d4662c69997ef822d55 XMM05=000000000000000000000000000000ff XMM06=562390d5494334466284999733822d55 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f8361818720 CR3=0000000010072000 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=4b222bd8548f0099d04e83f29c464a34 XMM02=000000000011a930ec2efd57dc4c00df XMM03=0000000000121e70eb3d0d18abbb1283 XMM04=a8582cb98ee01b1300000000000ae988 XMM05=5a9d233068761c4a0000000000131cf0 XMM06=b3a55eeb19da3fa40000000000130b58 XMM07=e042d86d42eb936e00000000001220f0 XMM08=eb3d0d18abbb1283000000000011a990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000