syzkaller login: [ 41.138821] BUG: Bad rss-counter state mm:00000000e349df36 type:MM_FILEPAGES val:33 [ 41.140185] BUG: Bad rss-counter state mm:00000000e349df36 type:MM_ANONPAGES val:22 [ 41.387928] ================================================================== [ 41.388802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.389687] Read of size 8 at addr ffff88800fda1228 by task sshd/219 [ 41.390572] [ 41.390782] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.391582] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.392527] Call Trace: [ 41.392833] [ 41.393109] dump_stack_lvl+0x91/0xf0 [ 41.393571] print_report+0xcc/0x620 [ 41.394028] ? __virt_addr_valid+0x102/0x340 [ 41.394551] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.395131] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.395720] kasan_report+0xbe/0xf0 [ 41.396177] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.396758] vma_interval_tree_remove+0xc75/0xec0 [ 41.397329] vma_prepare+0xc54/0x11a0 [ 41.397792] __split_vma+0x5af/0x950 [ 41.398252] ? __pfx___split_vma+0x10/0x10 [ 41.398767] ? find_held_lock+0x2c/0x110 [ 41.399272] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.399835] ? lock_is_held_type+0x9f/0x120 [ 41.400360] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.400947] ? mtree_range_walk+0x632/0x900 [ 41.401484] ? mas_walk+0x5c7/0x7c0 [ 41.401943] do_vmi_munmap+0x1f1/0x2b0 [ 41.402424] mmap_region+0x1f9/0x2660 [ 41.402892] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.403389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.404096] ? __pfx_lock_acquire+0x10/0x10 [ 41.404604] ? __pfx_mmap_region+0x10/0x10 [ 41.405116] ? security_mmap_addr+0x7d/0xa0 [ 41.405638] ? get_unmapped_area+0x1f5/0x3f0 [ 41.406171] do_mmap+0x854/0xf00 [ 41.406599] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.407078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.407614] ksys_mmap_pgoff+0x3af/0x500 [ 41.408109] do_syscall_64+0x3f/0x90 [ 41.408565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.409173] RIP: 0033:0x7f42aae83d82 [ 41.409606] 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 [ 41.411601] RSP: 002b:00007ffd472e24e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.412463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42aae83d82 [ 41.413261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42aa2bd000 [ 41.414055] RBP: 00007f42aa2bd000 R08: 0000000000000009 R09: 0000000000001000 [ 41.414853] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573eb92cec0 [ 41.415650] R13: 00007ffd472e2500 R14: 00007ffd472e2530 R15: 00007ffd472e2890 [ 41.416465] [ 41.416741] [ 41.416948] Allocated by task 212: [ 41.417352] kasan_save_stack+0x22/0x50 [ 41.417848] kasan_set_track+0x25/0x30 [ 41.418340] __kasan_slab_alloc+0x59/0x70 [ 41.418854] kmem_cache_alloc+0x16b/0x370 [ 41.419366] vm_area_dup+0x20/0x160 [ 41.419838] __split_vma+0x170/0x950 [ 41.420294] split_vma+0xc6/0x110 [ 41.420728] mprotect_fixup+0x8d2/0xb30 [ 41.421218] do_mprotect_pkey+0x87e/0xd40 [ 41.421728] __x64_sys_mprotect+0x78/0xc0 [ 41.422242] do_syscall_64+0x3f/0x90 [ 41.422705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.423345] [ 41.423553] Freed by task 212: [ 41.423948] kasan_save_stack+0x22/0x50 [ 41.424446] kasan_set_track+0x25/0x30 [ 41.424931] kasan_save_free_info+0x2b/0x50 [ 41.425459] __kasan_slab_free+0x10a/0x190 [ 41.425990] kmem_cache_free+0x10d/0x4d0 [ 41.426483] rcu_core+0x8c8/0x2860 [ 41.426922] __do_softirq+0x1b7/0x7d4 [ 41.427382] [ 41.427595] Last potentially related work creation: [ 41.428189] kasan_save_stack+0x22/0x50 [ 41.428689] __kasan_record_aux_stack+0x8e/0xa0 [ 41.429336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.429975] remove_vma+0x139/0x170 [ 41.430414] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.430963] do_vmi_munmap+0x1f1/0x2b0 [ 41.431452] __vm_munmap+0x138/0x3a0 [ 41.431936] __x64_sys_munmap+0x59/0x80 [ 41.432429] do_syscall_64+0x3f/0x90 [ 41.432898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.433542] [ 41.433750] The buggy address belongs to the object at ffff88800fda11d0 [ 41.433750] which belongs to the cache vm_area_struct of size 168 [ 41.435214] The buggy address is located 88 bytes inside of [ 41.435214] freed 168-byte region [ffff88800fda11d0, ffff88800fda1278) [ 41.436596] [ 41.436812] The buggy address belongs to the physical page: [ 41.437461] page:00000000595678ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfda1 [ 41.438551] memcg:ffff8880158df001 [ 41.438978] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.439617] page_type: 0xffffffff() [ 41.440074] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.440983] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158df001 [ 41.441880] page dumped because: kasan: bad access detected [ 41.442518] [ 41.442725] Memory state around the buggy address: [ 41.443299] ffff88800fda1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.444157] ffff88800fda1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.444995] >ffff88800fda1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.445822] ^ [ 41.446376] ffff88800fda1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.447215] ffff88800fda1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.448058] ================================================================== [ 41.448978] Disabling lock debugging due to kernel taint [ 43.445666] BUG: Bad rss-counter state mm:00000000f5c16ff3 type:MM_FILEPAGES val:33 [ 43.446931] BUG: Bad rss-counter state mm:00000000f5c16ff3 type:MM_ANONPAGES val:22 [ 43.846708] BUG: Bad rss-counter state mm:00000000df96dcdc type:MM_FILEPAGES val:33 [ 43.847896] BUG: Bad rss-counter state mm:00000000df96dcdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59332' (ECDSA) to the list of known hosts. 2023/06/20 04:51:10 fuzzer started 2023/06/20 04:51:10 dialing manager at localhost:44161 2023/06/20 04:51:10 checking machine... 2023/06/20 04:51:10 checking revisions... [ 44.555887] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:51:10 testing simple program... [ 44.603207] cgroup: Unknown subsys name 'net' [ 44.657484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff816cb769 RDX=0000000000006cb7 RSI=0000000000006cb7 RDI=ffffffff86502e9c RBP=ffff88800fcf78a0 RSP=ffff88800fcf77d8 R8 =0000000000000000 R9 =ffff88800fcf7888 R10=0000000000038001 R11=0000000000020cf8 R12=ffff88800fcf78a8 R13=ffff88800fcf7890 R14=ffff88800fcf7889 R15=ffff88800fcf7848 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007fc0039c2900 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=00007fc003f7a0b0 CR3=000000000cac0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000001f1 RBX=00000000000001f0 RCX=000055eb57f8e010 RDX=000000000000001d RSI=000055eb57fd0790 RDI=000055eb57fd07a0 RBP=00007fae92638b80 RSP=00007fffdc3722c0 R8 =0000000000000001 R9 =ffffffffffffff01 R10=0000000000000000 R11=0000000000000000 R12=000055eb57fd0790 R13=0000000000000000 R14=000055eb57fd07a0 R15=00000000fffffffe RIP=00007fae925009af RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fae91caf900 00000000 00000000 GS =0000 0000000000000000 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=00007fae910c39b8 CR3=000000000950a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3af86ece3f5d2e8f00000000000ae988 XMM05=db2226e02534fccc00000000001351f8 XMM06=4fda316b135da52b0000000000133c78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000