syzkaller login: [ 99.866554] BUG: Bad rss-counter state mm:000000008c7e3be1 type:MM_FILEPAGES val:33 [ 99.867982] BUG: Bad rss-counter state mm:000000008c7e3be1 type:MM_ANONPAGES val:22 [ 100.032064] ================================================================== [ 100.033292] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 100.034514] Read of size 8 at addr ffff88800e76e310 by task sshd/220 [ 100.035526] [ 100.035812] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 100.037144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 100.038433] Call Trace: [ 100.038850] [ 100.039220] dump_stack_lvl+0x91/0xf0 [ 100.039853] print_report+0xcc/0x620 [ 100.040488] ? __virt_addr_valid+0x102/0x340 [ 100.041212] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.042029] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.042831] kasan_report+0xbe/0xf0 [ 100.043451] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.044253] vma_interval_tree_remove+0xc75/0xec0 [ 100.045023] vma_prepare+0xc54/0x11a0 [ 100.045660] __split_vma+0x5af/0x950 [ 100.046264] ? __pfx___split_vma+0x10/0x10 [ 100.046957] ? find_held_lock+0x2c/0x110 [ 100.047640] do_vmi_align_munmap+0x2ba/0x11f0 [ 100.048373] ? lock_is_held_type+0x9f/0x120 [ 100.049079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 100.049906] ? mtree_range_walk+0x632/0x900 [ 100.050646] ? mas_walk+0x5c7/0x7c0 [ 100.051259] do_vmi_munmap+0x1f1/0x2b0 [ 100.051897] mmap_region+0x1f9/0x2660 [ 100.052533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 100.053193] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 100.054134] ? __pfx_lock_acquire+0x10/0x10 [ 100.054787] ? __pfx_mmap_region+0x10/0x10 [ 100.055422] ? security_mmap_addr+0x7d/0xa0 [ 100.056054] ? get_unmapped_area+0x1f5/0x3f0 [ 100.056707] do_mmap+0x854/0xf00 [ 100.057253] vm_mmap_pgoff+0x1a6/0x3a0 [ 100.057889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 100.058572] ksys_mmap_pgoff+0x3af/0x500 [ 100.059183] do_syscall_64+0x3f/0x90 [ 100.059745] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.060514] RIP: 0033:0x7ff99be49d82 [ 100.061082] 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 [ 100.063579] RSP: 002b:00007fffcb8ac7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 100.064503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff99be49d82 [ 100.065373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff99b283000 [ 100.066252] RBP: 00007ff99b283000 R08: 0000000000000009 R09: 0000000000001000 [ 100.067109] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e4151cf70 [ 100.067969] R13: 00007fffcb8ac7e0 R14: 00007fffcb8ac810 R15: 00007fffcb8acb70 [ 100.068830] [ 100.069121] [ 100.069337] Allocated by task 213: [ 100.069800] kasan_save_stack+0x22/0x50 [ 100.070319] kasan_set_track+0x25/0x30 [ 100.070811] __kasan_slab_alloc+0x59/0x70 [ 100.071344] kmem_cache_alloc+0x16b/0x370 [ 100.071864] vm_area_dup+0x20/0x160 [ 100.072327] __split_vma+0x170/0x950 [ 100.072795] split_vma+0xc6/0x110 [ 100.073241] mprotect_fixup+0x8d2/0xb30 [ 100.073783] do_mprotect_pkey+0x87e/0xd40 [ 100.074309] __x64_sys_mprotect+0x78/0xc0 [ 100.074842] do_syscall_64+0x3f/0x90 [ 100.075312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.075972] [ 100.076190] Freed by task 204: [ 100.076590] kasan_save_stack+0x22/0x50 [ 100.077094] kasan_set_track+0x25/0x30 [ 100.077624] kasan_save_free_info+0x2b/0x50 [ 100.078177] __kasan_slab_free+0x10a/0x190 [ 100.078723] kmem_cache_free+0x10d/0x4d0 [ 100.079245] rcu_core+0x8c8/0x2860 [ 100.079698] __do_softirq+0x1b7/0x7d4 [ 100.080187] [ 100.080407] Last potentially related work creation: [ 100.080997] kasan_save_stack+0x22/0x50 [ 100.081509] __kasan_record_aux_stack+0x8e/0xa0 [ 100.082121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 100.082778] remove_vma+0x139/0x170 [ 100.083233] do_vmi_align_munmap+0xd4a/0x11f0 [ 100.083799] do_vmi_munmap+0x1f1/0x2b0 [ 100.084292] __vm_munmap+0x138/0x3a0 [ 100.084761] __x64_sys_munmap+0x59/0x80 [ 100.085267] do_syscall_64+0x3f/0x90 [ 100.085755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.086420] [ 100.086641] Second to last potentially related work creation: [ 100.087342] kasan_save_stack+0x22/0x50 [ 100.087848] __kasan_record_aux_stack+0x8e/0xa0 [ 100.088442] __call_rcu_common.constprop.0+0x6a/0xb90 [ 100.089099] remove_vma+0x139/0x170 [ 100.089563] do_vmi_align_munmap+0xd4a/0x11f0 [ 100.090137] do_vmi_munmap+0x1f1/0x2b0 [ 100.090634] mmap_region+0x1f9/0x2660 [ 100.091116] do_mmap+0x854/0xf00 [ 100.091547] vm_mmap_pgoff+0x1a6/0x3a0 [ 100.092037] ksys_mmap_pgoff+0x3af/0x500 [ 100.092557] do_syscall_64+0x3f/0x90 [ 100.093036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 100.093703] [ 100.093925] The buggy address belongs to the object at ffff88800e76e2b8 [ 100.093925] which belongs to the cache vm_area_struct of size 168 [ 100.095424] The buggy address is located 88 bytes inside of [ 100.095424] freed 168-byte region [ffff88800e76e2b8, ffff88800e76e360) [ 100.096845] [ 100.097069] The buggy address belongs to the physical page: [ 100.097747] page:000000000cae1780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe76e [ 100.098854] memcg:ffff88800deef601 [ 100.099289] flags: 0x100000000000200(slab|node=0|zone=1) [ 100.099961] page_type: 0xffffffff() [ 100.100430] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6140 dead00000000000e [ 100.101386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deef601 [ 100.102340] page dumped because: kasan: bad access detected [ 100.103036] [ 100.103255] Memory state around the buggy address: [ 100.103846] ffff88800e76e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 100.104726] ffff88800e76e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 100.105616] >ffff88800e76e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 100.106485] ^ [ 100.106959] ffff88800e76e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 100.107817] ffff88800e76e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 100.108682] ================================================================== [ 100.109739] Disabling lock debugging due to kernel taint [ 102.794503] BUG: Bad rss-counter state mm:00000000759e8dec type:MM_FILEPAGES val:33 [ 102.795498] BUG: Bad rss-counter state mm:00000000759e8dec type:MM_ANONPAGES val:22 [ 103.304468] BUG: Bad rss-counter state mm:0000000087a59551 type:MM_FILEPAGES val:33 [ 103.305647] BUG: Bad rss-counter state mm:0000000087a59551 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16616' (ECDSA) to the list of known hosts. 2023/06/19 16:48:42 fuzzer started 2023/06/19 16:48:42 dialing manager at localhost:44161 2023/06/19 16:48:42 checking machine... 2023/06/19 16:48:42 checking revisions... [ 104.004788] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:48:42 testing simple program... [ 104.045733] cgroup: Unknown subsys name 'net' [ 104.092397] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:47:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=ffffffff864bb001 RDX=1ffff1100d9c136d RSI=ffffffff8450d49f RDI=ffff88806ce09b68 RBP=000000000000000a RSP=ffff88806ce09a78 R8 =ffffffff864bb032 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801a2d9d90 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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=00007fff3adcae48 CR3=0000000005482000 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=00007f3419cdc5100000561c761c3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83874fbb RDX=000000000002874f RSI=000000000002874f RDI=ffffffff865898fc RBP=ffff88801886f7a0 RSP=ffff88801886f6d8 R8 =0000000000000000 R9 =ffff88801886f788 R10=0000000000038001 R11=000000000008b5ce R12=ffff88801886f7a8 R13=ffff88801886f790 R14=ffff88801886f789 R15=ffff88801886f748 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007fa2e53ed900 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=00007fa2e59a4618 CR3=000000000fc52000 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