syzkaller login: [ 31.102766] BUG: Bad rss-counter state mm:00000000f99adb86 type:MM_FILEPAGES val:33 [ 31.104224] BUG: Bad rss-counter state mm:00000000f99adb86 type:MM_ANONPAGES val:22 [ 31.262206] ================================================================== [ 31.263451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264936] Read of size 8 at addr ffff88800e2fd4e0 by task sshd/221 [ 31.266109] [ 31.266423] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.267478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.268516] Call Trace: [ 31.268856] [ 31.269170] dump_stack_lvl+0x91/0xf0 [ 31.269702] print_report+0xcc/0x620 [ 31.270226] ? __virt_addr_valid+0x102/0x340 [ 31.270804] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271472] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272117] kasan_report+0xbe/0xf0 [ 31.272612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273261] vma_interval_tree_remove+0xc75/0xec0 [ 31.273901] vma_prepare+0xc54/0x11a0 [ 31.274394] __split_vma+0x5af/0x950 [ 31.274869] ? __pfx___split_vma+0x10/0x10 [ 31.275401] ? find_held_lock+0x2c/0x110 [ 31.275925] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.276499] ? lock_is_held_type+0x9f/0x120 [ 31.277041] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.277655] ? mtree_range_walk+0x632/0x900 [ 31.278240] ? mas_walk+0x5c7/0x7c0 [ 31.278724] do_vmi_munmap+0x1f1/0x2b0 [ 31.279222] mmap_region+0x1f9/0x2660 [ 31.279708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.280229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.280946] ? __pfx_lock_acquire+0x10/0x10 [ 31.281486] ? __pfx_mmap_region+0x10/0x10 [ 31.282024] ? security_mmap_addr+0x7d/0xa0 [ 31.282558] ? get_unmapped_area+0x1f5/0x3f0 [ 31.283107] do_mmap+0x854/0xf00 [ 31.283550] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.284053] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.284620] ksys_mmap_pgoff+0x3af/0x500 [ 31.285133] do_syscall_64+0x3f/0x90 [ 31.285613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286263] RIP: 0033:0x7f5d92158d82 [ 31.286731] 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 [ 31.288875] RSP: 002b:00007fff6e3a73b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.289787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d92158d82 [ 31.290683] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d91592000 [ 31.291532] RBP: 00007f5d91592000 R08: 0000000000000009 R09: 0000000000001000 [ 31.292388] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b29d225ec0 [ 31.293229] R13: 00007fff6e3a73d0 R14: 00007fff6e3a7400 R15: 00007fff6e3a7760 [ 31.294091] [ 31.294380] [ 31.294594] Allocated by task 214: [ 31.295025] kasan_save_stack+0x22/0x50 [ 31.295526] kasan_set_track+0x25/0x30 [ 31.296018] __kasan_slab_alloc+0x59/0x70 [ 31.296632] kmem_cache_alloc+0x16b/0x370 [ 31.297238] vm_area_dup+0x20/0x160 [ 31.297772] __split_vma+0x170/0x950 [ 31.298339] split_vma+0xc6/0x110 [ 31.298856] mprotect_fixup+0x8d2/0xb30 [ 31.299447] do_mprotect_pkey+0x87e/0xd40 [ 31.300060] __x64_sys_mprotect+0x78/0xc0 [ 31.300672] do_syscall_64+0x3f/0x90 [ 31.301232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301993] [ 31.302245] Freed by task 214: [ 31.302702] kasan_save_stack+0x22/0x50 [ 31.303297] kasan_set_track+0x25/0x30 [ 31.303876] kasan_save_free_info+0x2b/0x50 [ 31.304502] __kasan_slab_free+0x10a/0x190 [ 31.305127] kmem_cache_free+0x10d/0x4d0 [ 31.305724] rcu_core+0x8c8/0x2860 [ 31.306350] __do_softirq+0x1b7/0x7d4 [ 31.306914] [ 31.307168] Last potentially related work creation: [ 31.307856] kasan_save_stack+0x22/0x50 [ 31.308438] __kasan_record_aux_stack+0x8e/0xa0 [ 31.309103] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309874] remove_vma+0x139/0x170 [ 31.310403] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311054] do_vmi_munmap+0x1f1/0x2b0 [ 31.311623] __vm_munmap+0x138/0x3a0 [ 31.312168] __x64_sys_munmap+0x59/0x80 [ 31.312747] do_syscall_64+0x3f/0x90 [ 31.313277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313922] [ 31.314143] The buggy address belongs to the object at ffff88800e2fd488 [ 31.314143] which belongs to the cache vm_area_struct of size 168 [ 31.315628] The buggy address is located 88 bytes inside of [ 31.315628] freed 168-byte region [ffff88800e2fd488, ffff88800e2fd530) [ 31.317091] [ 31.317311] The buggy address belongs to the physical page: [ 31.317988] page:0000000003a8efe4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2fd [ 31.319076] memcg:ffff88800eb1ee01 [ 31.319505] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.320168] page_type: 0xffffffff() [ 31.320626] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.321546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb1ee01 [ 31.322485] page dumped because: kasan: bad access detected [ 31.323156] [ 31.323372] Memory state around the buggy address: [ 31.323973] ffff88800e2fd380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.324824] ffff88800e2fd400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.325676] >ffff88800e2fd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.326537] ^ [ 31.327291] ffff88800e2fd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.328140] ffff88800e2fd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.328984] ================================================================== [ 31.329921] Disabling lock debugging due to kernel taint [ 33.233166] BUG: Bad rss-counter state mm:00000000b005a201 type:MM_FILEPAGES val:33 [ 33.234010] BUG: Bad rss-counter state mm:00000000b005a201 type:MM_ANONPAGES val:22 [ 33.761649] BUG: Bad rss-counter state mm:0000000016f42632 type:MM_FILEPAGES val:33 [ 33.762792] BUG: Bad rss-counter state mm:0000000016f42632 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59105' (ECDSA) to the list of known hosts. 2023/06/20 16:21:49 fuzzer started 2023/06/20 16:21:49 dialing manager at localhost:36067 2023/06/20 16:21:49 checking machine... 2023/06/20 16:21:49 checking revisions... [ 34.444768] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:21:49 testing simple program... [ 34.494252] cgroup: Unknown subsys name 'net' [ 34.539201] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:21:48 Registers: info registers vcpu 0 RAX=000055d27352ea20 RBX=000000000000004e RCX=0000000000000000 RDX=0000000000000005 RSI=0000000000000000 RDI=000055d27352ea20 RBP=00007ffec363a510 RSP=00007ffec363a3e0 R8 =000055d271cfba10 R9 =00007ffec36af080 R10=0000000000000000 R11=00007ffec363a440 R12=000055d27352ea20 R13=0000000000000000 R14=0000000000000000 R15=000000000000004d RIP=000055d271cf361d RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fac97bd9900 00000000 00000000 GS =0000 0000000000000000 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=00007fac970f7000 CR3=000000000d60a000 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=000000000000273d67736d000d0a0920 XMM01=ffffffffff0f0e0d0c0b0a0908070605 XMM02=0000000000ff0000000000ff00000000 XMM03=2c67c8bc2e329bc3000000000011b400 XMM04=6bac6dfba8f1d85600000000000ae988 XMM05=ad7552a99f09f5630000000000132e70 XMM06=c291bd5c70af25b90000000000131f10 XMM07=fb795ef6d657705600000000001221e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=000000007e067f57 RCX=ffff88806c73fab8 RDX=0000000000000011 RSI=0000000000000001 RDI=00000000e269ce8f RBP=ffff88800c637c30 RSP=ffff888019ea72c0 R8 =00000000a4108766 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000082cc0 R14=ffff888019ea7328 R15=0000000000000011 RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007fb9de303900 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=00007fb9de8ba618 CR3=000000001a2e4000 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