syzkaller login: [ 31.112347] BUG: Bad rss-counter state mm:00000000fbe99d1f type:MM_FILEPAGES val:33 [ 31.113762] BUG: Bad rss-counter state mm:00000000fbe99d1f type:MM_ANONPAGES val:22 [ 31.273335] ================================================================== [ 31.274390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.275572] Read of size 8 at addr ffff88800e01d4e0 by task sshd/221 [ 31.276441] [ 31.276686] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.277657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.278774] Call Trace: [ 31.279140] [ 31.279458] dump_stack_lvl+0x91/0xf0 [ 31.280030] print_report+0xcc/0x620 [ 31.280579] ? __virt_addr_valid+0x102/0x340 [ 31.281201] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281900] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282604] kasan_report+0xbe/0xf0 [ 31.283139] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283878] vma_interval_tree_remove+0xc75/0xec0 [ 31.284553] vma_prepare+0xc54/0x11a0 [ 31.285089] __split_vma+0x5af/0x950 [ 31.285625] ? __pfx___split_vma+0x10/0x10 [ 31.286222] ? find_held_lock+0x2c/0x110 [ 31.286805] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.287443] ? lock_is_held_type+0x9f/0x120 [ 31.288078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.288763] ? mtree_range_walk+0x632/0x900 [ 31.289386] ? mas_walk+0x5c7/0x7c0 [ 31.289928] do_vmi_munmap+0x1f1/0x2b0 [ 31.290483] mmap_region+0x1f9/0x2660 [ 31.291031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.291646] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.292466] ? __pfx_lock_acquire+0x10/0x10 [ 31.293072] ? __pfx_mmap_region+0x10/0x10 [ 31.293670] ? security_mmap_addr+0x7d/0xa0 [ 31.294271] ? get_unmapped_area+0x1f5/0x3f0 [ 31.294894] do_mmap+0x854/0xf00 [ 31.295388] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.295996] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.296638] ksys_mmap_pgoff+0x3af/0x500 [ 31.297212] do_syscall_64+0x3f/0x90 [ 31.297749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298470] RIP: 0033:0x7fc351a17d82 [ 31.298983] 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 [ 31.301362] RSP: 002b:00007ffd04a12238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.302363] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc351a17d82 [ 31.303309] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc350e51000 [ 31.304293] RBP: 00007fc350e51000 R08: 0000000000000009 R09: 0000000000001000 [ 31.305241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b139c77d90 [ 31.306193] R13: 00007ffd04a12250 R14: 00007ffd04a12280 R15: 00007ffd04a125e0 [ 31.307152] [ 31.307474] [ 31.307760] Allocated by task 213: [ 31.308245] kasan_save_stack+0x22/0x50 [ 31.308811] kasan_set_track+0x25/0x30 [ 31.309369] __kasan_slab_alloc+0x59/0x70 [ 31.309958] kmem_cache_alloc+0x16b/0x370 [ 31.310538] vm_area_dup+0x20/0x160 [ 31.311052] __split_vma+0x170/0x950 [ 31.311600] split_vma+0xc6/0x110 [ 31.312093] mprotect_fixup+0x8d2/0xb30 [ 31.312654] do_mprotect_pkey+0x87e/0xd40 [ 31.313238] __x64_sys_mprotect+0x78/0xc0 [ 31.313817] do_syscall_64+0x3f/0x90 [ 31.314345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315056] [ 31.315298] Freed by task 213: [ 31.315775] kasan_save_stack+0x22/0x50 [ 31.316340] kasan_set_track+0x25/0x30 [ 31.316895] kasan_save_free_info+0x2b/0x50 [ 31.317494] __kasan_slab_free+0x10a/0x190 [ 31.318089] kmem_cache_free+0x10d/0x4d0 [ 31.318657] rcu_core+0x8c8/0x2860 [ 31.319153] __do_softirq+0x1b7/0x7d4 [ 31.319720] [ 31.319964] Last potentially related work creation: [ 31.320613] kasan_save_stack+0x22/0x50 [ 31.321172] __kasan_record_aux_stack+0x8e/0xa0 [ 31.321807] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.322515] remove_vma+0x139/0x170 [ 31.323015] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.323663] do_vmi_munmap+0x1f1/0x2b0 [ 31.324207] __vm_munmap+0x138/0x3a0 [ 31.324730] __x64_sys_munmap+0x59/0x80 [ 31.325281] do_syscall_64+0x3f/0x90 [ 31.325806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.326526] [ 31.326770] The buggy address belongs to the object at ffff88800e01d488 [ 31.326770] which belongs to the cache vm_area_struct of size 168 [ 31.328433] The buggy address is located 88 bytes inside of [ 31.328433] freed 168-byte region [ffff88800e01d488, ffff88800e01d530) [ 31.329987] [ 31.330227] The buggy address belongs to the physical page: [ 31.330954] page:0000000027a87cf0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe01d [ 31.332188] memcg:ffff888008eee801 [ 31.332659] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.333434] page_type: 0xffffffff() [ 31.333940] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 31.334964] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008eee801 [ 31.335997] page dumped because: kasan: bad access detected [ 31.336733] [ 31.336970] Memory state around the buggy address: [ 31.337607] ffff88800e01d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.338556] ffff88800e01d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.339502] >ffff88800e01d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.340483] ^ [ 31.341318] ffff88800e01d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.342259] ffff88800e01d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.343204] ================================================================== [ 31.344351] Disabling lock debugging due to kernel taint [ 33.180930] BUG: Bad rss-counter state mm:0000000032acc1b9 type:MM_FILEPAGES val:33 [ 33.182016] BUG: Bad rss-counter state mm:0000000032acc1b9 type:MM_ANONPAGES val:22 [ 33.660040] BUG: Bad rss-counter state mm:00000000bd67849e type:MM_FILEPAGES val:33 [ 33.662128] BUG: Bad rss-counter state mm:00000000bd67849e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7432' (ECDSA) to the list of known hosts. 2023/06/20 06:02:20 fuzzer started 2023/06/20 06:02:21 dialing manager at localhost:44161 2023/06/20 06:02:21 checking machine... 2023/06/20 06:02:21 checking revisions... [ 34.379092] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:02:21 testing simple program... [ 34.418639] cgroup: Unknown subsys name 'net' [ 34.448524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:18 Registers: info registers vcpu 0 RAX=1ffff1100194e813 RBX=ffff88800ca74000 RCX=0000000000000000 RDX=ffff88801030b680 RSI=ffffffff814d4559 RDI=ffff88800ca74098 RBP=000000007fff0000 RSP=ffff888014787de8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff888014787e30 R15=000000007fff0000 RIP=ffffffff814d456c 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 00007f3cff330900 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=0000557399391818 CR3=000000000c4ac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=089cd528a385c77100000000000ae988 XMM05=8d2257fea65927dd00000000001361a0 XMM06=c291bd5c70af25b90000000000135240 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055739938d372 RBX=000055739937d780 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000006 RDI=000055739938e230 RBP=0000000000000660 RSP=00007fff670b8050 R8 =0000557399390330 R9 =000000000000000e R10=000055739937d7b0 R11=0000000000000000 R12=0000557399367350 R13=000055739938d370 R14=00007fff670b80b0 R15=0000000000000000 RIP=00007f5a7fd944a4 RFL=00000206 [-----P-] 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 00007f5a7fded900 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=00007f5a803a50b0 CR3=000000000da90000 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=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