syzkaller login: [ 30.159212] BUG: Bad rss-counter state mm:000000008cda354c type:MM_FILEPAGES val:33 [ 30.160729] BUG: Bad rss-counter state mm:000000008cda354c type:MM_ANONPAGES val:22 [ 30.307472] ================================================================== [ 30.308568] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.309731] Read of size 8 at addr ffff88800ca3ba50 by task sshd/221 [ 30.310561] [ 30.310798] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.311762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.312814] Call Trace: [ 30.313160] [ 30.313473] dump_stack_lvl+0x91/0xf0 [ 30.314005] print_report+0xcc/0x620 [ 30.314534] ? __virt_addr_valid+0x102/0x340 [ 30.315140] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.315831] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316511] kasan_report+0xbe/0xf0 [ 30.317030] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.317715] vma_interval_tree_remove+0xc75/0xec0 [ 30.318372] vma_prepare+0xc54/0x11a0 [ 30.318896] __split_vma+0x5af/0x950 [ 30.319424] ? __pfx___split_vma+0x10/0x10 [ 30.320029] ? find_held_lock+0x2c/0x110 [ 30.320624] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.321272] ? lock_is_held_type+0x9f/0x120 [ 30.321891] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.322583] ? mtree_range_walk+0x632/0x900 [ 30.323220] ? mas_walk+0x5c7/0x7c0 [ 30.323778] do_vmi_munmap+0x1f1/0x2b0 [ 30.324341] mmap_region+0x1f9/0x2660 [ 30.324896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.325479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.326295] ? __pfx_lock_acquire+0x10/0x10 [ 30.326897] ? __pfx_mmap_region+0x10/0x10 [ 30.327523] ? security_mmap_addr+0x7d/0xa0 [ 30.328132] ? get_unmapped_area+0x1f5/0x3f0 [ 30.328762] do_mmap+0x854/0xf00 [ 30.329265] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.329827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.330467] ksys_mmap_pgoff+0x3af/0x500 [ 30.331044] do_syscall_64+0x3f/0x90 [ 30.331731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.332487] RIP: 0033:0x7f048c899d82 [ 30.333018] 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 [ 30.335508] RSP: 002b:00007ffe50499c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.336649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f048c899d82 [ 30.337613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f048bcd3000 [ 30.338580] RBP: 00007f048bcd3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.339562] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618bb8efec0 [ 30.340531] R13: 00007ffe50499c70 R14: 00007ffe50499ca0 R15: 00007ffe5049a000 [ 30.341512] [ 30.341849] [ 30.342100] Allocated by task 214: [ 30.342589] kasan_save_stack+0x22/0x50 [ 30.343161] kasan_set_track+0x25/0x30 [ 30.343732] __kasan_slab_alloc+0x59/0x70 [ 30.344331] kmem_cache_alloc+0x16b/0x370 [ 30.344920] vm_area_dup+0x20/0x160 [ 30.345433] __split_vma+0x170/0x950 [ 30.345958] split_vma+0xc6/0x110 [ 30.346456] mprotect_fixup+0x8d2/0xb30 [ 30.347027] do_mprotect_pkey+0x87e/0xd40 [ 30.347639] __x64_sys_mprotect+0x78/0xc0 [ 30.348238] do_syscall_64+0x3f/0x90 [ 30.348776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.349571] [ 30.349814] Freed by task 214: [ 30.350266] kasan_save_stack+0x22/0x50 [ 30.350842] kasan_set_track+0x25/0x30 [ 30.351412] kasan_save_free_info+0x2b/0x50 [ 30.352017] __kasan_slab_free+0x10a/0x190 [ 30.352625] kmem_cache_free+0x10d/0x4d0 [ 30.353207] rcu_core+0x8c8/0x2860 [ 30.353714] __do_softirq+0x1b7/0x7d4 [ 30.354258] [ 30.354503] Last potentially related work creation: [ 30.355165] kasan_save_stack+0x22/0x50 [ 30.355756] __kasan_record_aux_stack+0x8e/0xa0 [ 30.356411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.357147] remove_vma+0x139/0x170 [ 30.357659] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.358290] do_vmi_munmap+0x1f1/0x2b0 [ 30.358849] __vm_munmap+0x138/0x3a0 [ 30.359394] __x64_sys_munmap+0x59/0x80 [ 30.359958] do_syscall_64+0x3f/0x90 [ 30.360501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361239] [ 30.361485] The buggy address belongs to the object at ffff88800ca3b9f8 [ 30.361485] which belongs to the cache vm_area_struct of size 168 [ 30.363148] The buggy address is located 88 bytes inside of [ 30.363148] freed 168-byte region [ffff88800ca3b9f8, ffff88800ca3baa0) [ 30.364757] [ 30.365007] The buggy address belongs to the physical page: [ 30.365761] page:00000000e30a8b72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca3b [ 30.366987] memcg:ffff88800eed1701 [ 30.367501] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.368292] page_type: 0xffffffff() [ 30.368808] raw: 0100000000000200 ffff8880087a0c80 ffffea0000508000 dead000000000003 [ 30.369862] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eed1701 [ 30.370902] page dumped because: kasan: bad access detected [ 30.371666] [ 30.371918] Memory state around the buggy address: [ 30.372592] ffff88800ca3b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.373571] ffff88800ca3b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.374551] >ffff88800ca3ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.375544] ^ [ 30.376340] ffff88800ca3ba80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.377320] ffff88800ca3bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.378290] ================================================================== [ 30.379337] Disabling lock debugging due to kernel taint [ 32.279620] BUG: Bad rss-counter state mm:00000000edba642a type:MM_FILEPAGES val:33 [ 32.281235] BUG: Bad rss-counter state mm:00000000edba642a type:MM_ANONPAGES val:22 [ 32.749534] BUG: Bad rss-counter state mm:00000000d10e4840 type:MM_FILEPAGES val:33 [ 32.750552] BUG: Bad rss-counter state mm:00000000d10e4840 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29641' (ECDSA) to the list of known hosts. 2023/06/20 22:32:41 fuzzer started 2023/06/20 22:32:41 dialing manager at localhost:36067 2023/06/20 22:32:41 checking machine... 2023/06/20 22:32:41 checking revisions... [ 33.484334] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:32:41 testing simple program... [ 33.540734] cgroup: Unknown subsys name 'net' [ 33.598754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:41 Registers: info registers vcpu 0 RAX=ffff888019f465c0 RBX=ffff88800df77658 RCX=1ffff110033d6ed2 RDX=dffffc0000000000 RSI=ffff888019f37600 RDI=ffff88800df77688 RBP=ffff888019eb7660 RSP=ffff88800f137cb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019f36600 R13=0000000000000000 R14=ffff8880162e5e88 R15=ffff8880162e5e40 RIP=ffffffff81847688 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 00007fd289313900 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=00007fd2898cb0b0 CR3=000000001cda6000 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=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007f1b22f55310 CR3=000000000ca12000 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=f457f9ab62fceda1e04b9c484547e235 XMM02=2c67c8bc2e329bc3000000000011acc8 XMM03=fb795ef6d65770560000000000122240 XMM04=9e1ff926e364b4b200000000000ae988 XMM05=2e0a056f78c500db0000000000132ed8 XMM06=c291bd5c70af25b90000000000131f78 XMM07=e042d86d42eb936e00000000001224c0 XMM08=acc3be1c279de09a000000000011ad28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000