syzkaller login: [ 33.770611] BUG: Bad rss-counter state mm:0000000089420f6f type:MM_FILEPAGES val:33 [ 33.771631] BUG: Bad rss-counter state mm:0000000089420f6f type:MM_ANONPAGES val:22 [ 33.940068] ================================================================== [ 33.940973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.941912] Read of size 8 at addr ffff88800e013228 by task sshd/221 [ 33.942679] [ 33.942895] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.943858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.944814] Call Trace: [ 33.945132] [ 33.945415] dump_stack_lvl+0x91/0xf0 [ 33.945912] print_report+0xcc/0x620 [ 33.946386] ? __virt_addr_valid+0x102/0x340 [ 33.946935] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.947555] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.948161] kasan_report+0xbe/0xf0 [ 33.948629] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.949249] vma_interval_tree_remove+0xc75/0xec0 [ 33.949846] vma_prepare+0xc54/0x11a0 [ 33.950321] __split_vma+0x5af/0x950 [ 33.950789] ? __pfx___split_vma+0x10/0x10 [ 33.951335] ? find_held_lock+0x2c/0x110 [ 33.951852] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.952409] ? lock_is_held_type+0x9f/0x120 [ 33.952942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.953547] ? mtree_range_walk+0x632/0x900 [ 33.954093] ? mas_walk+0x5c7/0x7c0 [ 33.954560] do_vmi_munmap+0x1f1/0x2b0 [ 33.955047] mmap_region+0x1f9/0x2660 [ 33.955540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.956042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.956750] ? __pfx_lock_acquire+0x10/0x10 [ 33.957275] ? __pfx_mmap_region+0x10/0x10 [ 33.957805] ? security_mmap_addr+0x7d/0xa0 [ 33.958333] ? get_unmapped_area+0x1f5/0x3f0 [ 33.958871] do_mmap+0x854/0xf00 [ 33.959327] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.959815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.960366] ksys_mmap_pgoff+0x3af/0x500 [ 33.960874] do_syscall_64+0x3f/0x90 [ 33.961347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.961978] RIP: 0033:0x7f17e0c93d82 [ 33.962426] 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 [ 33.964528] RSP: 002b:00007fff26c007d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.965421] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17e0c93d82 [ 33.966262] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17e00cd000 [ 33.967116] RBP: 00007f17e00cd000 R08: 0000000000000009 R09: 0000000000001000 [ 33.967950] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f0c362f60 [ 33.968790] R13: 00007fff26c007f0 R14: 00007fff26c00820 R15: 00007fff26c00b80 [ 33.969634] [ 33.969924] [ 33.970137] Allocated by task 214: [ 33.970565] kasan_save_stack+0x22/0x50 [ 33.971060] kasan_set_track+0x25/0x30 [ 33.971574] __kasan_slab_alloc+0x59/0x70 [ 33.972087] kmem_cache_alloc+0x16b/0x370 [ 33.972599] vm_area_dup+0x20/0x160 [ 33.973052] __split_vma+0x170/0x950 [ 33.973509] split_vma+0xc6/0x110 [ 33.973942] mprotect_fixup+0x8d2/0xb30 [ 33.974452] do_mprotect_pkey+0x87e/0xd40 [ 33.974967] __x64_sys_mprotect+0x78/0xc0 [ 33.975493] do_syscall_64+0x3f/0x90 [ 33.975970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.976604] [ 33.976816] Freed by task 214: [ 33.977202] kasan_save_stack+0x22/0x50 [ 33.977701] kasan_set_track+0x25/0x30 [ 33.978191] kasan_save_free_info+0x2b/0x50 [ 33.978726] __kasan_slab_free+0x10a/0x190 [ 33.979262] kmem_cache_free+0x10d/0x4d0 [ 33.979765] rcu_core+0x8c8/0x2860 [ 33.980201] __do_softirq+0x1b7/0x7d4 [ 33.980669] [ 33.980885] Last potentially related work creation: [ 33.981462] kasan_save_stack+0x22/0x50 [ 33.981957] __kasan_record_aux_stack+0x8e/0xa0 [ 33.982526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.983175] remove_vma+0x139/0x170 [ 33.983627] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.984174] do_vmi_munmap+0x1f1/0x2b0 [ 33.984655] __vm_munmap+0x138/0x3a0 [ 33.985113] __x64_sys_munmap+0x59/0x80 [ 33.985601] do_syscall_64+0x3f/0x90 [ 33.986065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.986705] [ 33.986917] The buggy address belongs to the object at ffff88800e0131d0 [ 33.986917] which belongs to the cache vm_area_struct of size 168 [ 33.988374] The buggy address is located 88 bytes inside of [ 33.988374] freed 168-byte region [ffff88800e0131d0, ffff88800e013278) [ 33.989754] [ 33.989966] The buggy address belongs to the physical page: [ 33.990625] page:000000008a5f521b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe013 [ 33.991704] memcg:ffff88800dfeb801 [ 33.992131] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.992821] page_type: 0xffffffff() [ 33.993264] raw: 0100000000000200 ffff88800879fc80 ffffea00003589c0 dead000000000003 [ 33.994172] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfeb801 [ 33.995097] page dumped because: kasan: bad access detected [ 33.995748] [ 33.995964] Memory state around the buggy address: [ 33.996534] ffff88800e013100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.997376] ffff88800e013180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.998226] >ffff88800e013200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.999065] ^ [ 33.999624] ffff88800e013280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.000468] ffff88800e013300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.001309] ================================================================== [ 34.002309] Disabling lock debugging due to kernel taint [ 35.868773] BUG: Bad rss-counter state mm:0000000061fa21ca type:MM_FILEPAGES val:33 [ 35.869708] BUG: Bad rss-counter state mm:0000000061fa21ca type:MM_ANONPAGES val:22 [ 36.345697] BUG: Bad rss-counter state mm:00000000621507a2 type:MM_FILEPAGES val:33 [ 36.346590] BUG: Bad rss-counter state mm:00000000621507a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49346' (ECDSA) to the list of known hosts. 2023/06/19 15:11:48 fuzzer started 2023/06/19 15:11:48 dialing manager at localhost:44161 2023/06/19 15:11:48 checking machine... 2023/06/19 15:11:48 checking revisions... [ 37.059024] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:11:48 testing simple program... [ 37.103343] cgroup: Unknown subsys name 'net' [ 37.140922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:11:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff9a2a2ee8 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=00007fea89aed510000055c91ed9a790 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=0000000000000000 RBX=ffff88800f087aa0 RCX=ffffffff86137501 RDX=1ffff11001e10f56 RSI=ffffffff8180f43b RDI=ffff88800f087ab0 RBP=ffff88800f087a70 RSP=ffff88800f0879b8 R8 =ffffffff86137542 R9 =ffff88800f087a18 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800f087aa0 R13=0000000000000000 R14=ffff88800fd88000 R15=ffff88801a331b30 RIP=ffffffff813ad446 RFL=00000296 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe76283b900 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=00007fe762df30b0 CR3=000000000e4e2000 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