syzkaller login: [ 30.161876] BUG: Bad rss-counter state mm:00000000c4ff1eab type:MM_FILEPAGES val:33 [ 30.163287] BUG: Bad rss-counter state mm:00000000c4ff1eab type:MM_ANONPAGES val:22 [ 30.353219] ================================================================== [ 30.354184] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.355185] Read of size 8 at addr ffff88800b359880 by task sshd/219 [ 30.356115] [ 30.356348] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.357265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.358305] Call Trace: [ 30.358641] [ 30.358952] dump_stack_lvl+0x91/0xf0 [ 30.359472] print_report+0xcc/0x620 [ 30.359999] ? __virt_addr_valid+0x102/0x340 [ 30.360588] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361240] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361890] kasan_report+0xbe/0xf0 [ 30.362391] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.363072] vma_interval_tree_remove+0xc75/0xec0 [ 30.363704] vma_prepare+0xc54/0x11a0 [ 30.364213] __split_vma+0x5af/0x950 [ 30.364712] ? __pfx___split_vma+0x10/0x10 [ 30.365273] ? find_held_lock+0x2c/0x110 [ 30.365832] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.366433] ? lock_is_held_type+0x9f/0x120 [ 30.367009] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.367652] ? mtree_range_walk+0x632/0x900 [ 30.368244] ? mas_walk+0x5c7/0x7c0 [ 30.368751] do_vmi_munmap+0x1f1/0x2b0 [ 30.369267] mmap_region+0x1f9/0x2660 [ 30.369778] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.370322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.371103] ? __pfx_lock_acquire+0x10/0x10 [ 30.371664] ? __pfx_mmap_region+0x10/0x10 [ 30.372230] ? security_mmap_addr+0x7d/0xa0 [ 30.372798] ? get_unmapped_area+0x1f5/0x3f0 [ 30.373380] do_mmap+0x854/0xf00 [ 30.373844] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.374359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.374964] ksys_mmap_pgoff+0x3af/0x500 [ 30.375500] do_syscall_64+0x3f/0x90 [ 30.376007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376679] RIP: 0033:0x7f1d852e5d82 [ 30.377159] 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 [ 30.379393] RSP: 002b:00007ffde551e598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.380339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d852e5d82 [ 30.381225] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d8471f000 [ 30.382115] RBP: 00007f1d8471f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.383004] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d2b2a2ec0 [ 30.383886] R13: 00007ffde551e5b0 R14: 00007ffde551e5e0 R15: 00007ffde551e940 [ 30.384794] [ 30.385103] [ 30.385324] Allocated by task 212: [ 30.385768] kasan_save_stack+0x22/0x50 [ 30.386339] kasan_set_track+0x25/0x30 [ 30.386899] __kasan_slab_alloc+0x59/0x70 [ 30.387452] kmem_cache_alloc+0x16b/0x370 [ 30.388010] vm_area_dup+0x20/0x160 [ 30.388486] __split_vma+0x170/0x950 [ 30.388976] split_vma+0xc6/0x110 [ 30.389430] mprotect_fixup+0x8d2/0xb30 [ 30.389959] do_mprotect_pkey+0x87e/0xd40 [ 30.390507] __x64_sys_mprotect+0x78/0xc0 [ 30.391068] do_syscall_64+0x3f/0x90 [ 30.391555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.392219] [ 30.392438] Freed by task 212: [ 30.392845] kasan_save_stack+0x22/0x50 [ 30.393361] kasan_set_track+0x25/0x30 [ 30.393866] kasan_save_free_info+0x2b/0x50 [ 30.394425] __kasan_slab_free+0x10a/0x190 [ 30.394980] kmem_cache_free+0x10d/0x4d0 [ 30.395501] rcu_core+0x8c8/0x2860 [ 30.395966] __do_softirq+0x1b7/0x7d4 [ 30.396457] [ 30.396678] Last potentially related work creation: [ 30.397277] kasan_save_stack+0x22/0x50 [ 30.397789] __kasan_record_aux_stack+0x8e/0xa0 [ 30.398380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.399044] remove_vma+0x139/0x170 [ 30.399505] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.400073] do_vmi_munmap+0x1f1/0x2b0 [ 30.400569] __vm_munmap+0x138/0x3a0 [ 30.401042] __x64_sys_munmap+0x59/0x80 [ 30.401552] do_syscall_64+0x3f/0x90 [ 30.402039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.402698] [ 30.402921] The buggy address belongs to the object at ffff88800b359828 [ 30.402921] which belongs to the cache vm_area_struct of size 168 [ 30.404411] The buggy address is located 88 bytes inside of [ 30.404411] freed 168-byte region [ffff88800b359828, ffff88800b3598d0) [ 30.405833] [ 30.406051] The buggy address belongs to the physical page: [ 30.406730] page:000000008e230b56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb359 [ 30.407820] memcg:ffff88800ee86701 [ 30.408254] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.408906] page_type: 0xffffffff() [ 30.409366] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.410332] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee86701 [ 30.411263] page dumped because: kasan: bad access detected [ 30.411930] [ 30.412147] Memory state around the buggy address: [ 30.412733] ffff88800b359780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.413635] ffff88800b359800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.414505] >ffff88800b359880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.415367] ^ [ 30.415787] ffff88800b359900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.416651] ffff88800b359980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.417517] ================================================================== [ 30.418526] Disabling lock debugging due to kernel taint [ 32.759098] BUG: Bad rss-counter state mm:000000005b12ab82 type:MM_FILEPAGES val:33 [ 32.760099] BUG: Bad rss-counter state mm:000000005b12ab82 type:MM_ANONPAGES val:22 [ 33.155600] BUG: Bad rss-counter state mm:00000000a4dbfe92 type:MM_FILEPAGES val:33 [ 33.156721] BUG: Bad rss-counter state mm:00000000a4dbfe92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36580' (ECDSA) to the list of known hosts. 2023/06/21 01:52:22 fuzzer started 2023/06/21 01:52:23 dialing manager at localhost:36067 2023/06/21 01:52:23 checking machine... 2023/06/21 01:52:23 checking revisions... [ 33.861888] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:52:23 testing simple program... [ 33.910079] cgroup: Unknown subsys name 'net' [ 33.945855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:52:22 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880142e9b40 RSI=ffffffff811fc554 RDI=ffff88800d89d400 RBP=ffff88800d89d400 RSP=ffff888015917e40 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880142ea3b8 R13=ffff8880142e9b40 R14=0000000000000001 R15=ffff88800d89d400 RIP=ffffffff814c086b RFL=00000246 [---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 00007f6f437ee900 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=00007f6f42c495b8 CR3=000000000ef08000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=16be214a3b1f57a500000000000ae988 XMM05=232d447ed97a67b40000000000132940 XMM06=806171799158d9670000000000131730 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b2e46 RBX=0000000000000001 RCX=ffffffff83635bd6 RDX=0000000000000000 RSI=ffffffff863b2e46 RDI=ffffffff85fa4a98 RBP=ffff88806cf09b00 RSP=ffff88806cf09a20 R8 =ffffffff863b2e46 R9 =ffff88806cf09ae8 R10=0000000000038001 R11=000000000008a835 R12=ffff88806cf09b08 R13=ffff88806cf09af0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd 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 00007f6bde24b900 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=00007f6bde802618 CR3=000000000dcb8000 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