syzkaller login: [ 30.829538] BUG: Bad rss-counter state mm:0000000021e5f505 type:MM_FILEPAGES val:33 [ 30.831390] BUG: Bad rss-counter state mm:0000000021e5f505 type:MM_ANONPAGES val:22 [ 30.987294] ================================================================== [ 30.988013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.988761] Read of size 8 at addr ffff88800e1ff5c8 by task sshd/221 [ 30.989470] [ 30.989640] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.990315] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.991073] Call Trace: [ 30.991323] [ 30.991602] dump_stack_lvl+0x91/0xf0 [ 30.991986] print_report+0xcc/0x620 [ 30.992361] ? __virt_addr_valid+0x102/0x340 [ 30.992789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.993266] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.993747] kasan_report+0xbe/0xf0 [ 30.994126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.994616] vma_interval_tree_remove+0xc75/0xec0 [ 30.995084] vma_prepare+0xc54/0x11a0 [ 30.995468] __split_vma+0x5af/0x950 [ 30.995833] ? __pfx___split_vma+0x10/0x10 [ 30.996249] ? find_held_lock+0x2c/0x110 [ 30.996655] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.997099] ? lock_is_held_type+0x9f/0x120 [ 30.997519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.997988] ? mtree_range_walk+0x632/0x900 [ 30.998436] ? mas_walk+0x5c7/0x7c0 [ 30.998806] do_vmi_munmap+0x1f1/0x2b0 [ 30.999188] mmap_region+0x1f9/0x2660 [ 30.999563] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.999963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.000519] ? __pfx_lock_acquire+0x10/0x10 [ 31.000936] ? __pfx_mmap_region+0x10/0x10 [ 31.001348] ? security_mmap_addr+0x7d/0xa0 [ 31.001763] ? get_unmapped_area+0x1f5/0x3f0 [ 31.002187] do_mmap+0x854/0xf00 [ 31.002546] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.002933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.003375] ksys_mmap_pgoff+0x3af/0x500 [ 31.003770] do_syscall_64+0x3f/0x90 [ 31.004143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.004656] RIP: 0033:0x7fa7a0bf7d82 [ 31.005013] 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 [ 31.006691] RSP: 002b:00007fffb7bf0018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.007400] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7a0bf7d82 [ 31.008068] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7a0031000 [ 31.008745] RBP: 00007fa7a0031000 R08: 0000000000000009 R09: 0000000000001000 [ 31.009403] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c9f6f5980 [ 31.010070] R13: 00007fffb7bf0030 R14: 00007fffb7bf0060 R15: 00007fffb7bf03c0 [ 31.010762] [ 31.010990] [ 31.011158] Allocated by task 214: [ 31.011495] kasan_save_stack+0x22/0x50 [ 31.011889] kasan_set_track+0x25/0x30 [ 31.012275] __kasan_slab_alloc+0x59/0x70 [ 31.012681] kmem_cache_alloc+0x16b/0x370 [ 31.013082] vm_area_dup+0x20/0x160 [ 31.013442] __split_vma+0x170/0x950 [ 31.013803] split_vma+0xc6/0x110 [ 31.014146] mprotect_fixup+0x8d2/0xb30 [ 31.014545] do_mprotect_pkey+0x87e/0xd40 [ 31.014954] __x64_sys_mprotect+0x78/0xc0 [ 31.015358] do_syscall_64+0x3f/0x90 [ 31.015728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.016224] [ 31.016390] Freed by task 214: [ 31.016700] kasan_save_stack+0x22/0x50 [ 31.017089] kasan_set_track+0x25/0x30 [ 31.017473] kasan_save_free_info+0x2b/0x50 [ 31.017889] __kasan_slab_free+0x10a/0x190 [ 31.018308] kmem_cache_free+0x10d/0x4d0 [ 31.018707] rcu_core+0x8c8/0x2860 [ 31.019059] __do_softirq+0x1b7/0x7d4 [ 31.019431] [ 31.019597] Last potentially related work creation: [ 31.020056] kasan_save_stack+0x22/0x50 [ 31.020453] __kasan_record_aux_stack+0x8e/0xa0 [ 31.020898] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.021398] remove_vma+0x139/0x170 [ 31.021752] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.022189] do_vmi_munmap+0x1f1/0x2b0 [ 31.022588] __vm_munmap+0x138/0x3a0 [ 31.022953] __x64_sys_munmap+0x59/0x80 [ 31.023347] do_syscall_64+0x3f/0x90 [ 31.023713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.024213] [ 31.024380] Second to last potentially related work creation: [ 31.024916] kasan_save_stack+0x22/0x50 [ 31.025314] __kasan_record_aux_stack+0x8e/0xa0 [ 31.025763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.026269] remove_vma+0x139/0x170 [ 31.026636] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.027068] do_vmi_munmap+0x1f1/0x2b0 [ 31.027442] mmap_region+0x1f9/0x2660 [ 31.027809] do_mmap+0x854/0xf00 [ 31.028146] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.028526] ksys_mmap_pgoff+0x3af/0x500 [ 31.028915] do_syscall_64+0x3f/0x90 [ 31.029288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029789] [ 31.029958] The buggy address belongs to the object at ffff88800e1ff570 [ 31.029958] which belongs to the cache vm_area_struct of size 168 [ 31.031124] The buggy address is located 88 bytes inside of [ 31.031124] freed 168-byte region [ffff88800e1ff570, ffff88800e1ff618) [ 31.032216] [ 31.032381] The buggy address belongs to the physical page: [ 31.032894] page:000000005c242867 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ff [ 31.033742] memcg:ffff88800e547801 [ 31.034074] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.034592] page_type: 0xffffffff() [ 31.034945] raw: 0100000000000200 ffff8880087a0c80 ffffea0000344bc0 dead000000000006 [ 31.035671] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e547801 [ 31.036375] page dumped because: kasan: bad access detected [ 31.036901] [ 31.037066] Memory state around the buggy address: [ 31.037520] ffff88800e1ff480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.038197] ffff88800e1ff500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.038885] >ffff88800e1ff580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.039546] ^ [ 31.040071] ffff88800e1ff600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.040738] ffff88800e1ff680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.041403] ================================================================== [ 31.042157] Disabling lock debugging due to kernel taint [ 32.936426] BUG: Bad rss-counter state mm:00000000108c94e5 type:MM_FILEPAGES val:33 [ 32.937594] BUG: Bad rss-counter state mm:00000000108c94e5 type:MM_ANONPAGES val:22 [ 33.490072] BUG: Bad rss-counter state mm:00000000ca59ca9d type:MM_FILEPAGES val:33 [ 33.491477] BUG: Bad rss-counter state mm:00000000ca59ca9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35620' (ECDSA) to the list of known hosts. 2023/06/21 03:54:33 fuzzer started 2023/06/21 03:54:33 dialing manager at localhost:36067 2023/06/21 03:54:33 checking machine... 2023/06/21 03:54:33 checking revisions... [ 34.136817] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:54:33 testing simple program... [ 34.189404] cgroup: Unknown subsys name 'net' [ 34.233511] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff86138e01 RDX=1ffff1100d9c137b RSI=ffffffff8180c705 RDI=ffff88806ce09b6c RBP=ffff88806ce09bd8 RSP=ffff88806ce09a78 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a3fb670 RIP=ffffffff813ad543 RFL=00000216 [----AP-] 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 0000000000000000 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=0000558d0dd49e58 CR3=000000000de4e000 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=2032333a34353a3330203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34353a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000007c06add40 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffffffff0a81e48 RSP=ffff88806cf09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffff88806cf09ff8 R12=1ffffffff0f6dc38 R13=0000000000000001 R14=ffff888016e97998 R15=dffffc0000000000 RIP=ffffffff812ae860 RFL=00000002 [-------] 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 00007f602c66c900 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=00007f602cc23618 CR3=000000000edba000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000