syzkaller login: [ 33.570447] BUG: Bad rss-counter state mm:0000000036096473 type:MM_FILEPAGES val:33 [ 33.571759] BUG: Bad rss-counter state mm:0000000036096473 type:MM_ANONPAGES val:22 [ 33.797856] ================================================================== [ 33.799086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.800212] Read of size 8 at addr ffff88800e134798 by task sshd/222 [ 33.801145] [ 33.801408] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.802483] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.803497] Call Trace: [ 33.803836] [ 33.804123] dump_stack_lvl+0x91/0xf0 [ 33.804619] print_report+0xcc/0x620 [ 33.805110] ? __virt_addr_valid+0x102/0x340 [ 33.805674] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.806316] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.806954] kasan_report+0xbe/0xf0 [ 33.807437] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.808078] vma_interval_tree_remove+0xc75/0xec0 [ 33.808712] vma_prepare+0xc54/0x11a0 [ 33.809199] __split_vma+0x5af/0x950 [ 33.809688] ? __pfx___split_vma+0x10/0x10 [ 33.810242] ? find_held_lock+0x2c/0x110 [ 33.810785] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.811366] ? lock_is_held_type+0x9f/0x120 [ 33.811919] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.812552] ? mtree_range_walk+0x632/0x900 [ 33.813126] ? mas_walk+0x5c7/0x7c0 [ 33.813618] do_vmi_munmap+0x1f1/0x2b0 [ 33.814141] mmap_region+0x1f9/0x2660 [ 33.814644] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.815163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.815900] ? __pfx_lock_acquire+0x10/0x10 [ 33.816438] ? __pfx_mmap_region+0x10/0x10 [ 33.816985] ? security_mmap_addr+0x7d/0xa0 [ 33.817523] ? get_unmapped_area+0x1f5/0x3f0 [ 33.818102] do_mmap+0x854/0xf00 [ 33.818553] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.819055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.819647] ksys_mmap_pgoff+0x3af/0x500 [ 33.820169] do_syscall_64+0x3f/0x90 [ 33.820663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.821332] RIP: 0033:0x7eff2fb32d82 [ 33.821804] 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 [ 33.823989] RSP: 002b:00007ffd3033a3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.824910] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff2fb32d82 [ 33.825795] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff2ef6c000 [ 33.826672] RBP: 00007eff2ef6c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.827561] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db65b07ec0 [ 33.828438] R13: 00007ffd3033a400 R14: 00007ffd3033a430 R15: 00007ffd3033a790 [ 33.829328] [ 33.829635] [ 33.829854] Allocated by task 212: [ 33.830313] kasan_save_stack+0x22/0x50 [ 33.830829] kasan_set_track+0x25/0x30 [ 33.831334] __kasan_slab_alloc+0x59/0x70 [ 33.831872] kmem_cache_alloc+0x16b/0x370 [ 33.832396] vm_area_dup+0x20/0x160 [ 33.832858] __split_vma+0x170/0x950 [ 33.833330] split_vma+0xc6/0x110 [ 33.833776] mprotect_fixup+0x8d2/0xb30 [ 33.834308] do_mprotect_pkey+0x87e/0xd40 [ 33.834840] __x64_sys_mprotect+0x78/0xc0 [ 33.835369] do_syscall_64+0x3f/0x90 [ 33.835858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.836519] [ 33.836738] Freed by task 212: [ 33.837142] kasan_save_stack+0x22/0x50 [ 33.837664] kasan_set_track+0x25/0x30 [ 33.838178] kasan_save_free_info+0x2b/0x50 [ 33.838719] __kasan_slab_free+0x10a/0x190 [ 33.839305] kmem_cache_free+0x10d/0x4d0 [ 33.839832] rcu_core+0x8c8/0x2860 [ 33.840281] __do_softirq+0x1b7/0x7d4 [ 33.840777] [ 33.840995] Last potentially related work creation: [ 33.841587] kasan_save_stack+0x22/0x50 [ 33.842119] __kasan_record_aux_stack+0x8e/0xa0 [ 33.842715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.843374] remove_vma+0x139/0x170 [ 33.843841] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.844414] do_vmi_munmap+0x1f1/0x2b0 [ 33.844907] __vm_munmap+0x138/0x3a0 [ 33.845384] __x64_sys_munmap+0x59/0x80 [ 33.845899] do_syscall_64+0x3f/0x90 [ 33.846388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.847050] [ 33.847267] The buggy address belongs to the object at ffff88800e134740 [ 33.847267] which belongs to the cache vm_area_struct of size 168 [ 33.848780] The buggy address is located 88 bytes inside of [ 33.848780] freed 168-byte region [ffff88800e134740, ffff88800e1347e8) [ 33.850263] [ 33.850480] The buggy address belongs to the physical page: [ 33.851158] page:0000000056b91cbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe134 [ 33.852273] memcg:ffff88800dfc6301 [ 33.852714] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.853382] page_type: 0xffffffff() [ 33.853841] raw: 0100000000000200 ffff88800879fc80 ffffea0000382740 dead000000000004 [ 33.854804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc6301 [ 33.855743] page dumped because: kasan: bad access detected [ 33.856421] [ 33.856642] Memory state around the buggy address: [ 33.857230] ffff88800e134680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.858120] ffff88800e134700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.858992] >ffff88800e134780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.859867] ^ [ 33.860383] ffff88800e134800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.861259] ffff88800e134880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.862150] ================================================================== [ 33.863104] Disabling lock debugging due to kernel taint [ 36.102133] BUG: Bad rss-counter state mm:00000000659f3701 type:MM_FILEPAGES val:33 [ 36.103122] BUG: Bad rss-counter state mm:00000000659f3701 type:MM_ANONPAGES val:22 [ 36.653497] BUG: Bad rss-counter state mm:00000000f50eca4b type:MM_FILEPAGES val:33 [ 36.654662] BUG: Bad rss-counter state mm:00000000f50eca4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39873' (ECDSA) to the list of known hosts. 2023/06/19 12:01:49 fuzzer started 2023/06/19 12:01:49 dialing manager at localhost:44161 2023/06/19 12:01:49 checking machine... 2023/06/19 12:01:49 checking revisions... [ 37.289095] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:01:49 testing simple program... [ 37.348139] cgroup: Unknown subsys name 'net' [ 37.390343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:01:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000006 RCX=0000000000000000 RDX=ffff888015d8d1c0 RSI=0000000000000002 RDI=0000000000000000 RBP=ffff888015c27a18 RSP=ffff888015c279f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=ffff88801624dbd8 R13=0000000000000002 R14=ffff888015c27a58 R15=ffff88801624dbd8 RIP=ffffffff814c0384 RFL=00000202 [-------] 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 00007f4887263900 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=00007f48866c0170 CR3=000000000f4e4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d986488c7ab3e97600000000000ae988 XMM05=19f7700d9bd40e9c00000000001345b0 XMM06=19e9129bd510f2350000000000133448 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff00f8e5e8 CR3=0000000005482000 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=00007fd4e88cf510000055ff8f587790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000