syzkaller login: [ 30.940664] BUG: Bad rss-counter state mm:00000000de5fa759 type:MM_FILEPAGES val:33 [ 30.941877] BUG: Bad rss-counter state mm:00000000de5fa759 type:MM_ANONPAGES val:22 [ 31.000750] ================================================================== [ 31.001651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.002590] Read of size 8 at addr ffff8880199a8b38 by task sshd/221 [ 31.003362] [ 31.003578] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.004532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.005507] Call Trace: [ 31.005827] [ 31.006141] dump_stack_lvl+0x91/0xf0 [ 31.006636] print_report+0xcc/0x620 [ 31.007123] ? __virt_addr_valid+0x102/0x340 [ 31.007673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008316] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008931] kasan_report+0xbe/0xf0 [ 31.009417] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010049] vma_interval_tree_remove+0xc75/0xec0 [ 31.010658] vma_prepare+0xc54/0x11a0 [ 31.011130] __split_vma+0x5af/0x950 [ 31.011605] ? __pfx___split_vma+0x10/0x10 [ 31.012146] ? find_held_lock+0x2c/0x110 [ 31.012666] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.013239] ? lock_is_held_type+0x9f/0x120 [ 31.013777] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.014386] ? mtree_range_walk+0x632/0x900 [ 31.014942] ? mas_walk+0x5c7/0x7c0 [ 31.015433] do_vmi_munmap+0x1f1/0x2b0 [ 31.015955] mmap_region+0x1f9/0x2660 [ 31.016435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.016951] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.017667] ? __pfx_lock_acquire+0x10/0x10 [ 31.018203] ? __pfx_mmap_region+0x10/0x10 [ 31.018735] ? security_mmap_addr+0x7d/0xa0 [ 31.019277] ? get_unmapped_area+0x1f5/0x3f0 [ 31.019844] do_mmap+0x854/0xf00 [ 31.020297] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.020792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.021362] ksys_mmap_pgoff+0x3af/0x500 [ 31.021878] do_syscall_64+0x3f/0x90 [ 31.022367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.023027] RIP: 0033:0x7f3c289eed82 [ 31.023481] 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 [ 31.025642] RSP: 002b:00007ffe4314de88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.026549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c289eed82 [ 31.027413] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c27e28000 [ 31.028292] RBP: 00007f3c27e28000 R08: 0000000000000009 R09: 0000000000001000 [ 31.029156] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f790c51ec0 [ 31.030011] R13: 00007ffe4314dea0 R14: 00007ffe4314ded0 R15: 00007ffe4314e230 [ 31.030888] [ 31.031178] [ 31.031392] Allocated by task 214: [ 31.031828] kasan_save_stack+0x22/0x50 [ 31.032337] kasan_set_track+0x25/0x30 [ 31.032841] __kasan_slab_alloc+0x59/0x70 [ 31.033371] kmem_cache_alloc+0x16b/0x370 [ 31.033904] vm_area_dup+0x20/0x160 [ 31.034374] __split_vma+0x170/0x950 [ 31.034839] split_vma+0xc6/0x110 [ 31.035281] mprotect_fixup+0x8d2/0xb30 [ 31.035803] do_mprotect_pkey+0x87e/0xd40 [ 31.036327] __x64_sys_mprotect+0x78/0xc0 [ 31.036851] do_syscall_64+0x3f/0x90 [ 31.037321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037965] [ 31.038182] Freed by task 214: [ 31.038584] kasan_save_stack+0x22/0x50 [ 31.039083] kasan_set_track+0x25/0x30 [ 31.039579] kasan_save_free_info+0x2b/0x50 [ 31.040116] __kasan_slab_free+0x10a/0x190 [ 31.040650] kmem_cache_free+0x10d/0x4d0 [ 31.041157] rcu_core+0x8c8/0x2860 [ 31.041604] __do_softirq+0x1b7/0x7d4 [ 31.042080] [ 31.042298] Last potentially related work creation: [ 31.042889] kasan_save_stack+0x22/0x50 [ 31.043394] __kasan_record_aux_stack+0x8e/0xa0 [ 31.043976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.044619] remove_vma+0x139/0x170 [ 31.045068] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.045623] do_vmi_munmap+0x1f1/0x2b0 [ 31.046108] __vm_munmap+0x138/0x3a0 [ 31.046579] __x64_sys_munmap+0x59/0x80 [ 31.047083] do_syscall_64+0x3f/0x90 [ 31.047556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048219] [ 31.048445] The buggy address belongs to the object at ffff8880199a8ae0 [ 31.048445] which belongs to the cache vm_area_struct of size 168 [ 31.049930] The buggy address is located 88 bytes inside of [ 31.049930] freed 168-byte region [ffff8880199a8ae0, ffff8880199a8b88) [ 31.051336] [ 31.051551] The buggy address belongs to the physical page: [ 31.052213] page:00000000af21c3db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199a8 [ 31.053320] memcg:ffff8880159ce101 [ 31.053748] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.054403] page_type: 0xffffffff() [ 31.054865] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.055811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159ce101 [ 31.056729] page dumped because: kasan: bad access detected [ 31.057394] [ 31.057609] Memory state around the buggy address: [ 31.058212] ffff8880199a8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.059073] ffff8880199a8a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.059950] >ffff8880199a8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.060814] ^ [ 31.061434] ffff8880199a8b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.062304] ffff8880199a8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.063154] ================================================================== [ 31.064226] Disabling lock debugging due to kernel taint [ 32.961078] BUG: Bad rss-counter state mm:00000000b841c4cb type:MM_FILEPAGES val:33 [ 32.962232] BUG: Bad rss-counter state mm:00000000b841c4cb type:MM_ANONPAGES val:22 [ 33.365845] BUG: Bad rss-counter state mm:00000000d4a7a57a type:MM_FILEPAGES val:33 [ 33.366851] BUG: Bad rss-counter state mm:00000000d4a7a57a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8953' (ECDSA) to the list of known hosts. 2023/06/20 14:45:14 fuzzer started 2023/06/20 14:45:15 dialing manager at localhost:36067 2023/06/20 14:45:15 checking machine... 2023/06/20 14:45:15 checking revisions... [ 34.104617] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:45:15 testing simple program... [ 34.155028] cgroup: Unknown subsys name 'net' [ 34.197910] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff88800c789b40 RSI=ffffffff818a2807 RDI=0000000000000005 RBP=ffff8880183bfb20 RSP=ffff8880183bf950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000001 R12=ffff888008919be8 R13=0000000000000002 R14=ffff8880183bfb70 R15=ffff8880181d2225 RIP=ffffffff814c089b 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 00007f486bc88900 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=00007f486c23d650 CR3=000000000e330000 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=0000000000000000 RBX=0000563e57d6ea00 RCX=0000563e57d6ea00 RDX=0000000000000002 RSI=0000000000000020 RDI=0000563e57d55350 RBP=0000000000000020 RSP=00007ffca5cb12c0 R8 =0000563e57d55350 R9 =0000563e57d6ea10 R10=00007f486bc30010 R11=00007f486bc30016 R12=0000563e57d55350 R13=0000000000000000 R14=0000000000000000 R15=00007f486bc3000a RIP=00007f486bc2f284 RFL=00000246 [---Z-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 00007f486bc88900 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=00007ffc9bcb2f18 CR3=000000000e330000 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=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