syzkaller login: [ 32.923466] BUG: Bad rss-counter state mm:00000000ec3d056b type:MM_FILEPAGES val:33 [ 32.925615] BUG: Bad rss-counter state mm:00000000ec3d056b type:MM_ANONPAGES val:22 [ 33.076936] ================================================================== [ 33.077802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.078695] Read of size 8 at addr ffff888009652058 by task sshd/221 [ 33.079415] [ 33.079627] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.080599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.081510] Call Trace: [ 33.081811] [ 33.082081] dump_stack_lvl+0x91/0xf0 [ 33.082605] print_report+0xcc/0x620 [ 33.083066] ? __virt_addr_valid+0x102/0x340 [ 33.083589] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.084179] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.084768] kasan_report+0xbe/0xf0 [ 33.085220] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.085808] vma_interval_tree_remove+0xc75/0xec0 [ 33.086387] vma_prepare+0xc54/0x11a0 [ 33.086843] __split_vma+0x5af/0x950 [ 33.087312] ? __pfx___split_vma+0x10/0x10 [ 33.087842] ? find_held_lock+0x2c/0x110 [ 33.088361] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.088916] ? lock_is_held_type+0x9f/0x120 [ 33.089453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.090048] ? mtree_range_walk+0x632/0x900 [ 33.090628] ? mas_walk+0x5c7/0x7c0 [ 33.091097] do_vmi_munmap+0x1f1/0x2b0 [ 33.091585] mmap_region+0x1f9/0x2660 [ 33.092058] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.092570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.093271] ? __pfx_lock_acquire+0x10/0x10 [ 33.093803] ? __pfx_mmap_region+0x10/0x10 [ 33.094335] ? security_mmap_addr+0x7d/0xa0 [ 33.094867] ? get_unmapped_area+0x1f5/0x3f0 [ 33.095401] do_mmap+0x854/0xf00 [ 33.095831] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.096323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.096878] ksys_mmap_pgoff+0x3af/0x500 [ 33.097384] do_syscall_64+0x3f/0x90 [ 33.097861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.098512] RIP: 0033:0x7fcbe70cdd82 [ 33.098970] 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 [ 33.101077] RSP: 002b:00007ffe595647d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.101976] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbe70cdd82 [ 33.102823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbe6507000 [ 33.103671] RBP: 00007fcbe6507000 R08: 0000000000000009 R09: 0000000000001000 [ 33.104503] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd70e48980 [ 33.105340] R13: 00007ffe595647f0 R14: 00007ffe59564820 R15: 00007ffe59564b80 [ 33.106220] [ 33.106507] [ 33.106717] Allocated by task 214: [ 33.107146] kasan_save_stack+0x22/0x50 [ 33.107648] kasan_set_track+0x25/0x30 [ 33.108141] __kasan_slab_alloc+0x59/0x70 [ 33.108658] kmem_cache_alloc+0x16b/0x370 [ 33.109170] vm_area_dup+0x20/0x160 [ 33.109619] __split_vma+0x170/0x950 [ 33.110081] split_vma+0xc6/0x110 [ 33.110536] mprotect_fixup+0x8d2/0xb30 [ 33.111032] do_mprotect_pkey+0x87e/0xd40 [ 33.111554] __x64_sys_mprotect+0x78/0xc0 [ 33.112069] do_syscall_64+0x3f/0x90 [ 33.112534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.113161] [ 33.113378] Freed by task 214: [ 33.113773] kasan_save_stack+0x22/0x50 [ 33.114289] kasan_set_track+0x25/0x30 [ 33.114783] kasan_save_free_info+0x2b/0x50 [ 33.115313] __kasan_slab_free+0x10a/0x190 [ 33.115842] kmem_cache_free+0x10d/0x4d0 [ 33.116349] rcu_core+0x8c8/0x2860 [ 33.116784] __do_softirq+0x1b7/0x7d4 [ 33.117255] [ 33.117465] Last potentially related work creation: [ 33.118039] kasan_save_stack+0x22/0x50 [ 33.118561] __kasan_record_aux_stack+0x8e/0xa0 [ 33.119133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.119773] remove_vma+0x139/0x170 [ 33.120224] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.120775] do_vmi_munmap+0x1f1/0x2b0 [ 33.121257] __vm_munmap+0x138/0x3a0 [ 33.121787] __x64_sys_munmap+0x59/0x80 [ 33.122287] do_syscall_64+0x3f/0x90 [ 33.122757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.123390] [ 33.123606] The buggy address belongs to the object at ffff888009652000 [ 33.123606] which belongs to the cache vm_area_struct of size 168 [ 33.125060] The buggy address is located 88 bytes inside of [ 33.125060] freed 168-byte region [ffff888009652000, ffff8880096520a8) [ 33.126463] [ 33.126681] The buggy address belongs to the physical page: [ 33.127335] page:00000000e1c6871e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9652 [ 33.128403] memcg:ffff88800e218101 [ 33.128825] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.129474] page_type: 0xffffffff() [ 33.129919] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.130850] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e218101 [ 33.131750] page dumped because: kasan: bad access detected [ 33.132401] [ 33.132617] Memory state around the buggy address: [ 33.133186] ffff888009651f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.134032] ffff888009651f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.134896] >ffff888009652000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.135754] ^ [ 33.136458] ffff888009652080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.137262] ffff888009652100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.138060] ================================================================== [ 33.139080] Disabling lock debugging due to kernel taint [ 35.428007] BUG: Bad rss-counter state mm:0000000076650aa2 type:MM_FILEPAGES val:33 [ 35.429166] BUG: Bad rss-counter state mm:0000000076650aa2 type:MM_ANONPAGES val:22 [ 35.797176] BUG: Bad rss-counter state mm:00000000b3918138 type:MM_FILEPAGES val:33 [ 35.798910] BUG: Bad rss-counter state mm:00000000b3918138 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25230' (ECDSA) to the list of known hosts. 2023/06/20 05:05:27 fuzzer started 2023/06/20 05:05:27 dialing manager at localhost:44161 2023/06/20 05:05:27 checking machine... 2023/06/20 05:05:27 checking revisions... [ 36.507012] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:05:27 testing simple program... [ 36.550038] cgroup: Unknown subsys name 'net' [ 36.590597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:25 Registers: info registers vcpu 0 RAX=ffffffff861c7687 RBX=0000000000000001 RCX=ffffffff861c7682 RDX=0000000000000002 RSI=0000000000000007 RDI=ffffffff85e5cae4 RBP=ffff88801475f930 RSP=ffff88801475f868 R8 =ffffffff861c7664 R9 =ffff88801475f918 R10=0000000000038001 R11=0000000000038dc4 R12=ffff88801475f938 R13=ffff88801475f920 R14=ffff88801475f919 R15=ffff88801475f8d8 RIP=ffffffff81130a72 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 00007f9a1e17a900 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=00007f9a1e731618 CR3=000000000e3e4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=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=00007fbd70ca3780 CR3=000000000db66000 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=fb814191ce97edb3564be633d47630cd XMM02=2c67c8bc2e329bc3000000000011fe40 XMM03=fb795ef6d657705600000000001245e0 XMM04=75e8a2a7a5cbbed000000000000ae988 XMM05=e432ccd44c2aeada00000000001345d8 XMM06=c291bd5c70af25b90000000000133fd0 XMM07=e042d86d42eb936e0000000000124860 XMM08=6ecc563f8ab6eef7000000000011fea0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000