syzkaller login: [ 28.804290] sshd (212) used greatest stack depth: 24128 bytes left [ 28.807209] BUG: Bad rss-counter state mm:000000009a9dd29c type:MM_FILEPAGES val:33 [ 28.808185] BUG: Bad rss-counter state mm:000000009a9dd29c type:MM_ANONPAGES val:22 [ 28.980083] ================================================================== [ 28.981032] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.981981] Read of size 8 at addr ffff88800e687a50 by task sshd/220 [ 28.982851] [ 28.983083] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.983988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.984985] Call Trace: [ 28.985308] [ 28.985599] dump_stack_lvl+0x91/0xf0 [ 28.986099] print_report+0xcc/0x620 [ 28.986594] ? __virt_addr_valid+0x102/0x340 [ 28.987165] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.987814] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.988510] kasan_report+0xbe/0xf0 [ 28.989000] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.989644] vma_interval_tree_remove+0xc75/0xec0 [ 28.990255] vma_prepare+0xc54/0x11a0 [ 28.990743] __split_vma+0x5af/0x950 [ 28.991216] ? __pfx___split_vma+0x10/0x10 [ 28.991771] ? find_held_lock+0x2c/0x110 [ 28.992317] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.992902] ? lock_is_held_type+0x9f/0x120 [ 28.993473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.994097] ? mtree_range_walk+0x632/0x900 [ 28.994685] ? mas_walk+0x5c7/0x7c0 [ 28.995189] do_vmi_munmap+0x1f1/0x2b0 [ 28.995696] mmap_region+0x1f9/0x2660 [ 28.996213] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.996744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.997485] ? __pfx_lock_acquire+0x10/0x10 [ 28.998037] ? __pfx_mmap_region+0x10/0x10 [ 28.998589] ? security_mmap_addr+0x7d/0xa0 [ 28.999142] ? get_unmapped_area+0x1f5/0x3f0 [ 28.999702] do_mmap+0x854/0xf00 [ 29.000161] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.000668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.001242] ksys_mmap_pgoff+0x3af/0x500 [ 29.001767] do_syscall_64+0x3f/0x90 [ 29.002252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.002909] RIP: 0033:0x7fa4fb301d82 [ 29.003373] 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 [ 29.005557] RSP: 002b:00007ffd5d7682d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.006460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4fb301d82 [ 29.007309] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4fa73b000 [ 29.008185] RBP: 00007fa4fa73b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.009035] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ea1367ec0 [ 29.009899] R13: 00007ffd5d7682f0 R14: 00007ffd5d768320 R15: 00007ffd5d768680 [ 29.010775] [ 29.011097] [ 29.011320] Allocated by task 212: [ 29.011747] kasan_save_stack+0x22/0x50 [ 29.012284] kasan_set_track+0x25/0x30 [ 29.012787] __kasan_slab_alloc+0x59/0x70 [ 29.013323] kmem_cache_alloc+0x16b/0x370 [ 29.013839] vm_area_dup+0x20/0x160 [ 29.014297] __split_vma+0x170/0x950 [ 29.014767] split_vma+0xc6/0x110 [ 29.015206] mprotect_fixup+0x8d2/0xb30 [ 29.015712] do_mprotect_pkey+0x87e/0xd40 [ 29.016257] __x64_sys_mprotect+0x78/0xc0 [ 29.016779] do_syscall_64+0x3f/0x90 [ 29.017257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.017913] [ 29.018134] Freed by task 212: [ 29.018526] kasan_save_stack+0x22/0x50 [ 29.019031] kasan_set_track+0x25/0x30 [ 29.019529] kasan_save_free_info+0x2b/0x50 [ 29.020076] __kasan_slab_free+0x10a/0x190 [ 29.020619] kmem_cache_free+0x10d/0x4d0 [ 29.021136] rcu_core+0x8c8/0x2860 [ 29.021586] __do_softirq+0x1b7/0x7d4 [ 29.022084] [ 29.022336] Last potentially related work creation: [ 29.023021] kasan_save_stack+0x22/0x50 [ 29.023613] __kasan_record_aux_stack+0x8e/0xa0 [ 29.024314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.025067] remove_vma+0x139/0x170 [ 29.025594] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.026246] do_vmi_munmap+0x1f1/0x2b0 [ 29.026811] __vm_munmap+0x138/0x3a0 [ 29.027355] __x64_sys_munmap+0x59/0x80 [ 29.027952] do_syscall_64+0x3f/0x90 [ 29.028512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.029260] [ 29.029508] Second to last potentially related work creation: [ 29.030306] kasan_save_stack+0x22/0x50 [ 29.030887] __kasan_record_aux_stack+0x8e/0xa0 [ 29.031552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.032302] remove_vma+0x139/0x170 [ 29.032829] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.033472] do_vmi_munmap+0x1f1/0x2b0 [ 29.034039] __vm_munmap+0x138/0x3a0 [ 29.034575] elf_map+0x26f/0x310 [ 29.035087] load_elf_binary+0xd82/0x5030 [ 29.035693] bprm_execve+0x803/0x1940 [ 29.036260] do_execveat_common+0x734/0x8e0 [ 29.036868] __x64_sys_execve+0x93/0xc0 [ 29.037410] do_syscall_64+0x3f/0x90 [ 29.037940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.038661] [ 29.038900] The buggy address belongs to the object at ffff88800e6879f8 [ 29.038900] which belongs to the cache vm_area_struct of size 168 [ 29.040542] The buggy address is located 88 bytes inside of [ 29.040542] freed 168-byte region [ffff88800e6879f8, ffff88800e687aa0) [ 29.042170] [ 29.042424] The buggy address belongs to the physical page: [ 29.043197] page:00000000eb3a66d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe687 [ 29.044473] memcg:ffff88800f16f401 [ 29.044966] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.045708] page_type: 0xffffffff() [ 29.046230] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a1080 dead000000000002 [ 29.047287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f16f401 [ 29.048335] page dumped because: kasan: bad access detected [ 29.049099] [ 29.049345] Memory state around the buggy address: [ 29.050004] ffff88800e687900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.050997] ffff88800e687980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.051985] >ffff88800e687a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.052966] ^ [ 29.053772] ffff88800e687a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.054735] ffff88800e687b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.055702] ================================================================== [ 29.056874] Disabling lock debugging due to kernel taint [ 30.970938] BUG: Bad rss-counter state mm:000000004ab19d02 type:MM_FILEPAGES val:33 [ 30.971793] BUG: Bad rss-counter state mm:000000004ab19d02 type:MM_ANONPAGES val:22 [ 31.421727] BUG: Bad rss-counter state mm:00000000a1dc4bc5 type:MM_FILEPAGES val:33 [ 31.422756] BUG: Bad rss-counter state mm:00000000a1dc4bc5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3779' (ECDSA) to the list of known hosts. 2023/06/20 20:22:20 fuzzer started 2023/06/20 20:22:20 dialing manager at localhost:36067 2023/06/20 20:22:20 checking machine... 2023/06/20 20:22:20 checking revisions... [ 32.114347] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:22:20 testing simple program... [ 32.154283] cgroup: Unknown subsys name 'net' [ 32.205247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:22:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002fe2ed0 RSI=ffffffff81acbc77 RDI=ffff888017f176f0 RBP=ffff888017f176c0 RSP=ffff888017f17618 R8 =0000000000000001 R9 =ffff888017f17668 R10=0000000000038001 R11=000000000002f6f7 R12=ffff888017f176f0 R13=0000000000000000 R14=ffff88800fc5d1c0 R15=0000000000000d40 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007f1faffff700 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=00007fffb8e86000 CR3=000000000eb36000 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=2030323a32323a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32323a3032203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f71b2de2d90 CR3=000000000caa0000 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=d1017be1c3959a959b4630c80fb0089e XMM02=ec2efd57dc4c00df000000000011d5f0 XMM03=1587c1469b955335000000000011d6c0 XMM04=4c8c22203c6a737900000000000ae988 XMM05=d50b82633ad078b300000000001338c8 XMM06=4fda316b135da52b00000000001332c0 XMM07=e042d86d42eb936e00000000001218b0 XMM08=1587c1469b955335000000000011d6c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000