syzkaller login: [ 140.918180] BUG: Bad rss-counter state mm:00000000c8605177 type:MM_FILEPAGES val:33 [ 140.919747] BUG: Bad rss-counter state mm:00000000c8605177 type:MM_ANONPAGES val:22 [ 141.036339] ================================================================== [ 141.037250] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 141.038190] Read of size 8 at addr ffff888016464228 by task sshd/220 [ 141.038967] [ 141.039188] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 141.040355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 141.041333] Call Trace: [ 141.041659] [ 141.041959] dump_stack_lvl+0x91/0xf0 [ 141.042449] print_report+0xcc/0x620 [ 141.042936] ? __virt_addr_valid+0x102/0x340 [ 141.043485] ? vma_interval_tree_remove+0xc75/0xec0 [ 141.044130] ? vma_interval_tree_remove+0xc75/0xec0 [ 141.044743] kasan_report+0xbe/0xf0 [ 141.045220] ? vma_interval_tree_remove+0xc75/0xec0 [ 141.045853] vma_interval_tree_remove+0xc75/0xec0 [ 141.046454] vma_prepare+0xc54/0x11a0 [ 141.046935] __split_vma+0x5af/0x950 [ 141.047418] ? __pfx___split_vma+0x10/0x10 [ 141.047955] ? find_held_lock+0x2c/0x110 [ 141.048479] do_vmi_align_munmap+0x2ba/0x11f0 [ 141.049051] ? lock_is_held_type+0x9f/0x120 [ 141.049592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 141.050208] ? mtree_range_walk+0x632/0x900 [ 141.050769] ? mas_walk+0x5c7/0x7c0 [ 141.051246] do_vmi_munmap+0x1f1/0x2b0 [ 141.051762] mmap_region+0x1f9/0x2660 [ 141.052251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 141.052761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 141.053473] ? __pfx_lock_acquire+0x10/0x10 [ 141.054011] ? __pfx_mmap_region+0x10/0x10 [ 141.054541] ? security_mmap_addr+0x7d/0xa0 [ 141.055072] ? get_unmapped_area+0x1f5/0x3f0 [ 141.055621] do_mmap+0x854/0xf00 [ 141.056078] vm_mmap_pgoff+0x1a6/0x3a0 [ 141.056577] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 141.057141] ksys_mmap_pgoff+0x3af/0x500 [ 141.057653] do_syscall_64+0x3f/0x90 [ 141.058132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 141.058781] RIP: 0033:0x7f2990b59d82 [ 141.059248] 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 [ 141.061385] RSP: 002b:00007ffffb63fd28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 141.062297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2990b59d82 [ 141.063158] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f298ff93000 [ 141.064023] RBP: 00007f298ff93000 R08: 0000000000000009 R09: 0000000000001000 [ 141.064886] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560470e97ec0 [ 141.065743] R13: 00007ffffb63fd40 R14: 00007ffffb63fd70 R15: 00007ffffb6400d0 [ 141.066611] [ 141.066904] [ 141.067122] Allocated by task 213: [ 141.067553] kasan_save_stack+0x22/0x50 [ 141.068077] kasan_set_track+0x25/0x30 [ 141.068582] __kasan_slab_alloc+0x59/0x70 [ 141.069109] kmem_cache_alloc+0x16b/0x370 [ 141.069624] vm_area_dup+0x20/0x160 [ 141.070078] __split_vma+0x170/0x950 [ 141.070588] split_vma+0xc6/0x110 [ 141.071035] mprotect_fixup+0x8d2/0xb30 [ 141.071544] do_mprotect_pkey+0x87e/0xd40 [ 141.072074] __x64_sys_mprotect+0x78/0xc0 [ 141.072597] do_syscall_64+0x3f/0x90 [ 141.073070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 141.073710] [ 141.073925] Freed by task 213: [ 141.074336] kasan_save_stack+0x22/0x50 [ 141.074861] kasan_set_track+0x25/0x30 [ 141.075364] kasan_save_free_info+0x2b/0x50 [ 141.075921] __kasan_slab_free+0x10a/0x190 [ 141.076481] kmem_cache_free+0x10d/0x4d0 [ 141.077005] rcu_core+0x8c8/0x2860 [ 141.077459] __do_softirq+0x1b7/0x7d4 [ 141.077933] [ 141.078148] Last potentially related work creation: [ 141.078733] kasan_save_stack+0x22/0x50 [ 141.079237] __kasan_record_aux_stack+0x8e/0xa0 [ 141.079817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 141.080465] remove_vma+0x139/0x170 [ 141.080932] do_vmi_align_munmap+0xd4a/0x11f0 [ 141.081501] do_vmi_munmap+0x1f1/0x2b0 [ 141.081986] __vm_munmap+0x138/0x3a0 [ 141.082460] __x64_sys_munmap+0x59/0x80 [ 141.082956] do_syscall_64+0x3f/0x90 [ 141.083440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 141.084103] [ 141.084319] The buggy address belongs to the object at ffff8880164641d0 [ 141.084319] which belongs to the cache vm_area_struct of size 168 [ 141.085803] The buggy address is located 88 bytes inside of [ 141.085803] freed 168-byte region [ffff8880164641d0, ffff888016464278) [ 141.087252] [ 141.087471] The buggy address belongs to the physical page: [ 141.088150] page:00000000eaaf87b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16464 [ 141.089258] memcg:ffff88800fb91401 [ 141.089694] flags: 0x100000000000200(slab|node=0|zone=1) [ 141.090351] page_type: 0xffffffff() [ 141.090815] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 141.091748] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb91401 [ 141.092678] page dumped because: kasan: bad access detected [ 141.093361] [ 141.093580] Memory state around the buggy address: [ 141.094187] ffff888016464100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.095048] ffff888016464180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 141.095948] >ffff888016464200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 141.096856] ^ [ 141.097437] ffff888016464280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 141.098324] ffff888016464300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 141.099187] ================================================================== [ 141.100188] Disabling lock debugging due to kernel taint [ 142.918118] BUG: Bad rss-counter state mm:0000000066031a8e type:MM_FILEPAGES val:33 [ 142.919416] BUG: Bad rss-counter state mm:0000000066031a8e type:MM_ANONPAGES val:22 [ 143.321371] BUG: Bad rss-counter state mm:00000000fb663d19 type:MM_FILEPAGES val:33 [ 143.322616] BUG: Bad rss-counter state mm:00000000fb663d19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18672' (ECDSA) to the list of known hosts. 2023/06/19 23:58:56 fuzzer started 2023/06/19 23:58:56 dialing manager at localhost:44161 2023/06/19 23:58:56 checking machine... 2023/06/19 23:58:56 checking revisions... [ 144.040706] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:58:56 testing simple program... [ 144.097412] cgroup: Unknown subsys name 'net' [ 144.157857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:57:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ff74000 RCX=ffffffff818645a9 RDX=ffff88800e531b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88800f147d60 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000005a R13=ffff88800e531b40 R14=1ffff11001e28fb2 R15=ffff888019a7b438 RIP=ffffffff814c07e0 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 00007f3ae6ef0700 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=00007f3296b7c740 CR3=000000000e05e000 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=2036353a38353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888017dcf920 RSP=ffff888017dcf858 R8 =ffffffff864b024a R9 =ffff888017dcf908 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888017dcf928 R13=ffff888017dcf910 R14=ffff888017dcff58 R15=ffff888017dcf8c8 RIP=ffffffff81131153 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 00007f7c696d8900 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=00007ffce7692000 CR3=0000000017e10000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000