syzkaller login: [ 34.221336] BUG: Bad rss-counter state mm:0000000076bbf648 type:MM_FILEPAGES val:33 [ 34.222589] BUG: Bad rss-counter state mm:0000000076bbf648 type:MM_ANONPAGES val:22 [ 34.265364] ================================================================== [ 34.266439] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.267368] Read of size 8 at addr ffff888019d5a5c8 by task sshd/219 [ 34.268124] [ 34.268342] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.269236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.270213] Call Trace: [ 34.270528] [ 34.270810] dump_stack_lvl+0x91/0xf0 [ 34.271294] print_report+0xcc/0x620 [ 34.271783] ? __virt_addr_valid+0x102/0x340 [ 34.272328] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.272962] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.273595] kasan_report+0xbe/0xf0 [ 34.274062] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.274689] vma_interval_tree_remove+0xc75/0xec0 [ 34.275291] vma_prepare+0xc54/0x11a0 [ 34.275765] __split_vma+0x5af/0x950 [ 34.276235] ? __pfx___split_vma+0x10/0x10 [ 34.276761] ? find_held_lock+0x2c/0x110 [ 34.277289] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.277856] ? lock_is_held_type+0x9f/0x120 [ 34.278388] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.278994] ? mtree_range_walk+0x632/0x900 [ 34.279542] ? mas_walk+0x5c7/0x7c0 [ 34.280012] do_vmi_munmap+0x1f1/0x2b0 [ 34.280500] mmap_region+0x1f9/0x2660 [ 34.281002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.281509] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.282222] ? __pfx_lock_acquire+0x10/0x10 [ 34.282751] ? __pfx_mmap_region+0x10/0x10 [ 34.283283] ? security_mmap_addr+0x7d/0xa0 [ 34.283814] ? get_unmapped_area+0x1f5/0x3f0 [ 34.284357] do_mmap+0x854/0xf00 [ 34.284799] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.285309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.285877] ksys_mmap_pgoff+0x3af/0x500 [ 34.286376] do_syscall_64+0x3f/0x90 [ 34.286855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.287496] RIP: 0033:0x7fd998a09d82 [ 34.287944] 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 [ 34.290047] RSP: 002b:00007ffcf40021e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.290942] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd998a09d82 [ 34.291787] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd997e43000 [ 34.292623] RBP: 00007fd997e43000 R08: 0000000000000009 R09: 0000000000001000 [ 34.293482] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c312cbfd90 [ 34.294320] R13: 00007ffcf4002200 R14: 00007ffcf4002230 R15: 00007ffcf4002590 [ 34.295165] [ 34.295455] [ 34.295667] Allocated by task 212: [ 34.296095] kasan_save_stack+0x22/0x50 [ 34.296602] kasan_set_track+0x25/0x30 [ 34.297102] __kasan_slab_alloc+0x59/0x70 [ 34.297630] kmem_cache_alloc+0x16b/0x370 [ 34.298139] vm_area_dup+0x20/0x160 [ 34.298593] __split_vma+0x170/0x950 [ 34.299058] split_vma+0xc6/0x110 [ 34.299500] mprotect_fixup+0x8d2/0xb30 [ 34.299998] do_mprotect_pkey+0x87e/0xd40 [ 34.300517] __x64_sys_mprotect+0x78/0xc0 [ 34.301055] do_syscall_64+0x3f/0x90 [ 34.301533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.302176] [ 34.302388] Freed by task 212: [ 34.302779] kasan_save_stack+0x22/0x50 [ 34.303286] kasan_set_track+0x25/0x30 [ 34.303777] kasan_save_free_info+0x2b/0x50 [ 34.304308] __kasan_slab_free+0x10a/0x190 [ 34.304841] kmem_cache_free+0x10d/0x4d0 [ 34.305354] rcu_core+0x8c8/0x2860 [ 34.305793] __do_softirq+0x1b7/0x7d4 [ 34.306267] [ 34.306480] Last potentially related work creation: [ 34.307127] kasan_save_stack+0x22/0x50 [ 34.307628] __kasan_record_aux_stack+0x8e/0xa0 [ 34.308202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.308851] remove_vma+0x139/0x170 [ 34.309327] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.309889] do_vmi_munmap+0x1f1/0x2b0 [ 34.310374] __vm_munmap+0x138/0x3a0 [ 34.310849] __x64_sys_munmap+0x59/0x80 [ 34.311347] do_syscall_64+0x3f/0x90 [ 34.311823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.312466] [ 34.312682] Second to last potentially related work creation: [ 34.313366] kasan_save_stack+0x22/0x50 [ 34.313866] __kasan_record_aux_stack+0x8e/0xa0 [ 34.314433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.315067] remove_vma+0x139/0x170 [ 34.315519] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.316074] do_vmi_munmap+0x1f1/0x2b0 [ 34.316577] mmap_region+0x1f9/0x2660 [ 34.317062] do_mmap+0x854/0xf00 [ 34.317498] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.317980] ksys_mmap_pgoff+0x3af/0x500 [ 34.318480] do_syscall_64+0x3f/0x90 [ 34.318955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.319596] [ 34.319807] The buggy address belongs to the object at ffff888019d5a570 [ 34.319807] which belongs to the cache vm_area_struct of size 168 [ 34.321285] The buggy address is located 88 bytes inside of [ 34.321285] freed 168-byte region [ffff888019d5a570, ffff888019d5a618) [ 34.322693] [ 34.322911] The buggy address belongs to the physical page: [ 34.323578] page:0000000017dc7be6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d5a [ 34.324678] memcg:ffff888019d55401 [ 34.325147] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.325801] page_type: 0xffffffff() [ 34.326251] raw: 0100000000000200 ffff88800879fc80 ffffea0000673780 dead000000000004 [ 34.327169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d55401 [ 34.328066] page dumped because: kasan: bad access detected [ 34.328723] [ 34.328953] Memory state around the buggy address: [ 34.329523] ffff888019d5a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.330373] ffff888019d5a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 34.331219] >ffff888019d5a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.332069] ^ [ 34.332725] ffff888019d5a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.333592] ffff888019d5a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.334441] ================================================================== [ 34.335355] Disabling lock debugging due to kernel taint [ 36.309085] BUG: Bad rss-counter state mm:00000000e08e6de3 type:MM_FILEPAGES val:33 [ 36.310090] BUG: Bad rss-counter state mm:00000000e08e6de3 type:MM_ANONPAGES val:22 [ 36.724865] BUG: Bad rss-counter state mm:00000000d099bcc1 type:MM_FILEPAGES val:33 [ 36.726017] BUG: Bad rss-counter state mm:00000000d099bcc1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8358' (ECDSA) to the list of known hosts. 2023/06/20 05:48:32 fuzzer started 2023/06/20 05:48:32 dialing manager at localhost:44161 2023/06/20 05:48:32 checking machine... 2023/06/20 05:48:32 checking revisions... [ 37.484171] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:48:33 testing simple program... [ 37.533853] cgroup: Unknown subsys name 'net' [ 37.597754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:48:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce3ce80 RCX=0000000000000000 RDX=0000000080400040 RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff888015e1fc00 RSP=ffff888015e1fb40 R8 =0000000000400040 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008441500 R13=0000000000000000 R14=ffffea000039b980 R15=ffff88806ce3ce60 RIP=ffffffff81806d2e 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 00007fb6940fc900 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=00007fb6946b40b0 CR3=000000000a03e000 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=0000000080000000 RBX=00007f16437a7c00 RCX=ffffffff813a0ac9 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88801471f748 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800ffc8000 R15=000000008012000e RIP=ffffffff814c01d0 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 00007f1642eee900 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=00007f164236b4d0 CR3=0000000009d5e000 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=689c5d48db6e325b00000000000ae988 XMM05=e837cc91adca21ef0000000000136060 XMM06=dfcdbad4f1609c370000000000134f18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000