syzkaller login: [ 48.781993] BUG: Bad rss-counter state mm:00000000ee999a39 type:MM_FILEPAGES val:33 [ 48.783020] BUG: Bad rss-counter state mm:00000000ee999a39 type:MM_ANONPAGES val:22 [ 48.953165] ================================================================== [ 48.954289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.955245] Read of size 8 at addr ffff8880095bf880 by task sshd/221 [ 48.956198] [ 48.956424] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.957440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.958622] Call Trace: [ 48.959011] [ 48.959348] dump_stack_lvl+0x91/0xf0 [ 48.959938] print_report+0xcc/0x620 [ 48.960510] ? __virt_addr_valid+0x102/0x340 [ 48.961159] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.961892] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.962613] kasan_report+0xbe/0xf0 [ 48.963185] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.963941] vma_interval_tree_remove+0xc75/0xec0 [ 48.964685] vma_prepare+0xc54/0x11a0 [ 48.965298] __split_vma+0x5af/0x950 [ 48.965887] ? __pfx___split_vma+0x10/0x10 [ 48.966328] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 48.966823] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 48.967342] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.967777] ? lock_is_held_type+0x9f/0x120 [ 48.968187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.968647] ? mtree_range_walk+0x632/0x900 [ 48.969067] ? mas_walk+0x5c7/0x7c0 [ 48.969435] do_vmi_munmap+0x1f1/0x2b0 [ 48.969814] mmap_region+0x1f9/0x2660 [ 48.970187] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.970581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.971125] ? __pfx_lock_acquire+0x10/0x10 [ 48.971532] ? __pfx_mmap_region+0x10/0x10 [ 48.971935] ? security_mmap_addr+0x7d/0xa0 [ 48.972338] ? get_unmapped_area+0x1f5/0x3f0 [ 48.972756] do_mmap+0x854/0xf00 [ 48.973090] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.973475] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.973903] ksys_mmap_pgoff+0x3af/0x500 [ 48.974296] do_syscall_64+0x3f/0x90 [ 48.974662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.975155] RIP: 0033:0x7faf65596d82 [ 48.975503] 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 [ 48.977134] RSP: 002b:00007ffcf177d438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.977848] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf65596d82 [ 48.978427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf649d0000 [ 48.978966] RBP: 00007faf649d0000 R08: 0000000000000009 R09: 0000000000001000 [ 48.979518] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc73301b20 [ 48.980061] R13: 00007ffcf177d450 R14: 00007ffcf177d480 R15: 00007ffcf177d7e0 [ 48.980621] [ 48.980814] [ 48.980953] Allocated by task 214: [ 48.981235] kasan_save_stack+0x22/0x50 [ 48.981569] kasan_set_track+0x25/0x30 [ 48.981889] __kasan_slab_alloc+0x59/0x70 [ 48.982234] kmem_cache_alloc+0x16b/0x370 [ 48.982565] vm_area_dup+0x20/0x160 [ 48.982867] __split_vma+0x170/0x950 [ 48.983169] split_vma+0xc6/0x110 [ 48.983456] mprotect_fixup+0x8d2/0xb30 [ 48.983784] do_mprotect_pkey+0x87e/0xd40 [ 48.984124] __x64_sys_mprotect+0x78/0xc0 [ 48.984458] do_syscall_64+0x3f/0x90 [ 48.984765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.985176] [ 48.985325] Freed by task 214: [ 48.985579] kasan_save_stack+0x22/0x50 [ 48.985903] kasan_set_track+0x25/0x30 [ 48.986221] kasan_save_free_info+0x2b/0x50 [ 48.986557] __kasan_slab_free+0x10a/0x190 [ 48.986900] kmem_cache_free+0x10d/0x4d0 [ 48.987227] rcu_core+0x8c8/0x2860 [ 48.987514] __do_softirq+0x1b7/0x7d4 [ 48.987823] [ 48.987961] Last potentially related work creation: [ 48.988336] kasan_save_stack+0x22/0x50 [ 48.988663] __kasan_record_aux_stack+0x8e/0xa0 [ 48.989032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.989464] remove_vma+0x139/0x170 [ 48.989763] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.990122] do_vmi_munmap+0x1f1/0x2b0 [ 48.990435] __vm_munmap+0x138/0x3a0 [ 48.990736] __x64_sys_munmap+0x59/0x80 [ 48.991059] do_syscall_64+0x3f/0x90 [ 48.991363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.991779] [ 48.991917] The buggy address belongs to the object at ffff8880095bf828 [ 48.991917] which belongs to the cache vm_area_struct of size 168 [ 48.992869] The buggy address is located 88 bytes inside of [ 48.992869] freed 168-byte region [ffff8880095bf828, ffff8880095bf8d0) [ 48.993790] [ 48.993927] The buggy address belongs to the physical page: [ 48.994358] page:000000002031b0b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95bf [ 48.995070] memcg:ffff8880095c4701 [ 48.995345] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.995758] page_type: 0xffffffff() [ 48.996046] raw: 0100000000000200 ffff88800879fc80 ffffea0000366540 dead000000000008 [ 48.996718] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c4701 [ 48.997321] page dumped because: kasan: bad access detected [ 48.997747] [ 48.997884] Memory state around the buggy address: [ 48.998257] ffff8880095bf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 48.998810] ffff8880095bf800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 48.999355] >ffff8880095bf880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 48.999903] ^ [ 49.000164] ffff8880095bf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.000713] ffff8880095bf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 49.001267] ================================================================== [ 49.001942] Disabling lock debugging due to kernel taint [ 50.813488] BUG: Bad rss-counter state mm:00000000d8abe61e type:MM_FILEPAGES val:33 [ 50.814479] BUG: Bad rss-counter state mm:00000000d8abe61e type:MM_ANONPAGES val:22 [ 51.278594] BUG: Bad rss-counter state mm:000000004ce34d5d type:MM_FILEPAGES val:33 [ 51.280135] BUG: Bad rss-counter state mm:000000004ce34d5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4019' (ECDSA) to the list of known hosts. 2023/06/20 01:03:33 fuzzer started 2023/06/20 01:03:34 dialing manager at localhost:44161 2023/06/20 01:03:34 checking machine... 2023/06/20 01:03:34 checking revisions... [ 52.005819] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:03:34 testing simple program... [ 52.057406] cgroup: Unknown subsys name 'net' [ 52.107954] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:03:16 Registers: info registers vcpu 0 RAX=00007fa94586d060 RBX=00007ffffd93fa70 RCX=00007ffffd93f9e8 RDX=000000000000001b RSI=000000000000002c RDI=00007fa946353060 RBP=00007ffffd93fba0 RSP=00007ffffd93f910 R8 =0000556a2dca6810 R9 =00007ffffd93faa0 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007fa94633c9ed 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 00007fa9457b1900 00000000 00000000 GS =0000 0000000000000000 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=00007fa945b4e31c CR3=000000001ce54000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007efebdaa4220 CR3=000000000d594000 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=399d4d3a6e8ef88b514635667381ec9f XMM02=2c67c8bc2e329bc3000000000011cba8 XMM03=fb795ef6d65770560000000000124048 XMM04=a8343db20202856700000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d88 XMM06=6e429b67acf6509f0000000000132bf0 XMM07=e042d86d42eb936e00000000001242c8 XMM08=32b5e9540106886f000000000011cc08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000