syzkaller login: [ 41.092330] BUG: Bad rss-counter state mm:0000000096cdd8d8 type:MM_FILEPAGES val:33 [ 41.093359] BUG: Bad rss-counter state mm:0000000096cdd8d8 type:MM_ANONPAGES val:22 [ 41.253502] ================================================================== [ 41.254401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.255326] Read of size 8 at addr ffff888016b69140 by task sshd/223 [ 41.256237] [ 41.256454] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.257334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.258327] Call Trace: [ 41.258649] [ 41.258936] dump_stack_lvl+0x91/0xf0 [ 41.259424] print_report+0xcc/0x620 [ 41.259907] ? __virt_addr_valid+0x102/0x340 [ 41.260460] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.261104] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.261727] kasan_report+0xbe/0xf0 [ 41.262210] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.262844] vma_interval_tree_remove+0xc75/0xec0 [ 41.263451] vma_prepare+0xc54/0x11a0 [ 41.263937] __split_vma+0x5af/0x950 [ 41.264413] ? __pfx___split_vma+0x10/0x10 [ 41.264953] ? find_held_lock+0x2c/0x110 [ 41.265475] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.266059] ? lock_is_held_type+0x9f/0x120 [ 41.266597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.267204] ? mtree_range_walk+0x632/0x900 [ 41.267761] ? mas_walk+0x5c7/0x7c0 [ 41.268240] do_vmi_munmap+0x1f1/0x2b0 [ 41.268746] mmap_region+0x1f9/0x2660 [ 41.269236] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.269756] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.270482] ? __pfx_lock_acquire+0x10/0x10 [ 41.271015] ? __pfx_mmap_region+0x10/0x10 [ 41.271548] ? security_mmap_addr+0x7d/0xa0 [ 41.272079] ? get_unmapped_area+0x1f5/0x3f0 [ 41.272639] do_mmap+0x854/0xf00 [ 41.273103] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.273596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.274160] ksys_mmap_pgoff+0x3af/0x500 [ 41.274675] do_syscall_64+0x3f/0x90 [ 41.275155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.275806] RIP: 0033:0x7f489c48ad82 [ 41.276265] 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 [ 41.278419] RSP: 002b:00007fff24105f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.279333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f489c48ad82 [ 41.280194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f489b8c4000 [ 41.281066] RBP: 00007f489b8c4000 R08: 0000000000000009 R09: 0000000000001000 [ 41.281917] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa94a4bf70 [ 41.282765] R13: 00007fff24105fa0 R14: 00007fff24105fd0 R15: 00007fff24106330 [ 41.283632] [ 41.283934] [ 41.284156] Allocated by task 216: [ 41.284589] kasan_save_stack+0x22/0x50 [ 41.285122] kasan_set_track+0x25/0x30 [ 41.285623] __kasan_slab_alloc+0x59/0x70 [ 41.286155] kmem_cache_alloc+0x16b/0x370 [ 41.286669] vm_area_dup+0x20/0x160 [ 41.287128] __split_vma+0x170/0x950 [ 41.287592] split_vma+0xc6/0x110 [ 41.288039] mprotect_fixup+0x8d2/0xb30 [ 41.288545] do_mprotect_pkey+0x87e/0xd40 [ 41.289073] __x64_sys_mprotect+0x78/0xc0 [ 41.289594] do_syscall_64+0x3f/0x90 [ 41.290071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.290717] [ 41.290936] Freed by task 216: [ 41.291331] kasan_save_stack+0x22/0x50 [ 41.291843] kasan_set_track+0x25/0x30 [ 41.292340] kasan_save_free_info+0x2b/0x50 [ 41.292904] __kasan_slab_free+0x10a/0x190 [ 41.293437] kmem_cache_free+0x10d/0x4d0 [ 41.293948] rcu_core+0x8c8/0x2860 [ 41.294399] __do_softirq+0x1b7/0x7d4 [ 41.294875] [ 41.295090] Last potentially related work creation: [ 41.295688] kasan_save_stack+0x22/0x50 [ 41.296193] __kasan_record_aux_stack+0x8e/0xa0 [ 41.296783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.297485] remove_vma+0x139/0x170 [ 41.297938] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.298501] do_vmi_munmap+0x1f1/0x2b0 [ 41.298987] __vm_munmap+0x138/0x3a0 [ 41.299457] __x64_sys_munmap+0x59/0x80 [ 41.299952] do_syscall_64+0x3f/0x90 [ 41.300425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.301088] [ 41.301303] The buggy address belongs to the object at ffff888016b690e8 [ 41.301303] which belongs to the cache vm_area_struct of size 168 [ 41.302778] The buggy address is located 88 bytes inside of [ 41.302778] freed 168-byte region [ffff888016b690e8, ffff888016b69190) [ 41.304185] [ 41.304403] The buggy address belongs to the physical page: [ 41.305073] page:000000002b82f971 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b69 [ 41.306176] memcg:ffff88800684a901 [ 41.306611] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.307264] page_type: 0xffffffff() [ 41.307717] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.308645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800684a901 [ 41.309566] page dumped because: kasan: bad access detected [ 41.310226] [ 41.310444] Memory state around the buggy address: [ 41.311028] ffff888016b69000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.311889] ffff888016b69080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 41.312765] >ffff888016b69100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.313626] ^ [ 41.314270] ffff888016b69180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.315130] ffff888016b69200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.315982] ================================================================== [ 41.316908] Disabling lock debugging due to kernel taint [ 43.303161] BUG: Bad rss-counter state mm:0000000020a4f2f1 type:MM_FILEPAGES val:33 [ 43.304144] BUG: Bad rss-counter state mm:0000000020a4f2f1 type:MM_ANONPAGES val:22 [ 43.758058] BUG: Bad rss-counter state mm:00000000cebff803 type:MM_FILEPAGES val:33 [ 43.759716] BUG: Bad rss-counter state mm:00000000cebff803 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33999' (ECDSA) to the list of known hosts. 2023/06/19 16:50:15 fuzzer started 2023/06/19 16:50:15 dialing manager at localhost:44161 2023/06/19 16:50:15 checking machine... 2023/06/19 16:50:15 checking revisions... [ 44.488497] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:50:15 testing simple program... [ 44.542355] cgroup: Unknown subsys name 'net' [ 44.582996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:05 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff8880167af598 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856d8238 R13=ffffffff8180ae86 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180efaf RFL=00000046 [---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 00007fbbece8e900 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=00007fbbed445618 CR3=000000000d402000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8a07271988 CR3=000000000d4e6000 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=0982ad669ede5a9f5d40976f9ab29423 XMM02=2c67c8bc2e329bc3000000000011c690 XMM03=fb795ef6d65770560000000000123b30 XMM04=8b59a01975ebeffa00000000000ae988 XMM05=39888ec326409ae80000000000134478 XMM06=db20f175d54767f00000000000133518 XMM07=e042d86d42eb936e0000000000123db0 XMM08=62f03192ffad0949000000000011c6f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000