syzkaller login: [ 38.783818] BUG: Bad rss-counter state mm:000000003ce13562 type:MM_FILEPAGES val:33 [ 38.784840] BUG: Bad rss-counter state mm:000000003ce13562 type:MM_ANONPAGES val:22 [ 38.971925] ================================================================== [ 38.973039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.974255] Read of size 8 at addr ffff88800e073d08 by task sshd/221 [ 38.975089] [ 38.975327] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.976252] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.977321] Call Trace: [ 38.977663] [ 38.977959] dump_stack_lvl+0x91/0xf0 [ 38.978474] print_report+0xcc/0x620 [ 38.978991] ? __virt_addr_valid+0x102/0x340 [ 38.979596] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980247] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.980894] kasan_report+0xbe/0xf0 [ 38.981397] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.982037] vma_interval_tree_remove+0xc75/0xec0 [ 38.982678] vma_prepare+0xc54/0x11a0 [ 38.983185] __split_vma+0x5af/0x950 [ 38.983705] ? __pfx___split_vma+0x10/0x10 [ 38.984281] ? find_held_lock+0x2c/0x110 [ 38.984831] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.985421] ? lock_is_held_type+0x9f/0x120 [ 38.985989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.986620] ? mtree_range_walk+0x632/0x900 [ 38.987193] ? mas_walk+0x5c7/0x7c0 [ 38.987692] do_vmi_munmap+0x1f1/0x2b0 [ 38.988207] mmap_region+0x1f9/0x2660 [ 38.988714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.989237] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.989977] ? __pfx_lock_acquire+0x10/0x10 [ 38.990535] ? __pfx_mmap_region+0x10/0x10 [ 38.991081] ? security_mmap_addr+0x7d/0xa0 [ 38.991655] ? get_unmapped_area+0x1f5/0x3f0 [ 38.992220] do_mmap+0x854/0xf00 [ 38.992681] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.993188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.993772] ksys_mmap_pgoff+0x3af/0x500 [ 38.994298] do_syscall_64+0x3f/0x90 [ 38.994799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.995475] RIP: 0033:0x7f2d093b6d82 [ 38.995970] 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 [ 38.998175] RSP: 002b:00007fff7fb2c5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.999105] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2d093b6d82 [ 38.999990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2d087f0000 [ 39.000871] RBP: 00007f2d087f0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.001752] R10: 0000000000000812 R11: 0000000000000206 R12: 000056011ce13d90 [ 39.002633] R13: 00007fff7fb2c5d0 R14: 00007fff7fb2c600 R15: 00007fff7fb2c960 [ 39.003530] [ 39.003848] [ 39.004075] Allocated by task 214: [ 39.004529] kasan_save_stack+0x22/0x50 [ 39.005047] kasan_set_track+0x25/0x30 [ 39.005663] __kasan_slab_alloc+0x59/0x70 [ 39.006350] kmem_cache_alloc+0x16b/0x370 [ 39.007023] vm_area_dup+0x20/0x160 [ 39.007608] __split_vma+0x170/0x950 [ 39.008201] split_vma+0xc6/0x110 [ 39.008751] mprotect_fixup+0x8d2/0xb30 [ 39.009398] do_mprotect_pkey+0x87e/0xd40 [ 39.010057] __x64_sys_mprotect+0x78/0xc0 [ 39.010714] do_syscall_64+0x3f/0x90 [ 39.011303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.012124] [ 39.012389] Freed by task 205: [ 39.012875] kasan_save_stack+0x22/0x50 [ 39.013502] kasan_set_track+0x25/0x30 [ 39.014118] kasan_save_free_info+0x2b/0x50 [ 39.014776] __kasan_slab_free+0x10a/0x190 [ 39.015445] kmem_cache_free+0x10d/0x4d0 [ 39.016106] rcu_core+0x8c8/0x2860 [ 39.016672] __do_softirq+0x1b7/0x7d4 [ 39.017306] [ 39.017572] Last potentially related work creation: [ 39.018295] kasan_save_stack+0x22/0x50 [ 39.018927] __kasan_record_aux_stack+0x8e/0xa0 [ 39.019659] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.020459] remove_vma+0x139/0x170 [ 39.021031] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.021738] do_vmi_munmap+0x1f1/0x2b0 [ 39.022344] __vm_munmap+0x138/0x3a0 [ 39.022986] __x64_sys_munmap+0x59/0x80 [ 39.023700] do_syscall_64+0x3f/0x90 [ 39.024347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.025127] [ 39.025373] The buggy address belongs to the object at ffff88800e073cb0 [ 39.025373] which belongs to the cache vm_area_struct of size 168 [ 39.027075] The buggy address is located 88 bytes inside of [ 39.027075] freed 168-byte region [ffff88800e073cb0, ffff88800e073d58) [ 39.028751] [ 39.029003] The buggy address belongs to the physical page: [ 39.029772] page:0000000057c1e9c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe073 [ 39.031028] memcg:ffff88800e00a501 [ 39.031528] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.032351] page_type: 0xffffffff() [ 39.032919] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386040 dead000000000007 [ 39.034044] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e00a501 [ 39.035132] page dumped because: kasan: bad access detected [ 39.035956] [ 39.036214] Memory state around the buggy address: [ 39.036923] ffff88800e073c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.037960] ffff88800e073c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.039011] >ffff88800e073d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.040090] ^ [ 39.040635] ffff88800e073d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.041687] ffff88800e073e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.042718] ================================================================== [ 39.044149] Disabling lock debugging due to kernel taint [ 41.618054] BUG: Bad rss-counter state mm:00000000651ee06f type:MM_FILEPAGES val:31 [ 41.619173] BUG: Bad rss-counter state mm:00000000651ee06f type:MM_ANONPAGES val:22 [ 42.257694] BUG: Bad rss-counter state mm:000000005d530fb4 type:MM_FILEPAGES val:33 [ 42.258999] BUG: Bad rss-counter state mm:000000005d530fb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36159' (ECDSA) to the list of known hosts. 2023/06/21 06:26:21 fuzzer started 2023/06/21 06:26:21 dialing manager at localhost:36067 2023/06/21 06:26:21 checking machine... 2023/06/21 06:26:21 checking revisions... [ 42.925632] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:26:21 testing simple program... [ 42.966884] cgroup: Unknown subsys name 'net' [ 43.020900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:26:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=1ffff1100d9c135f RSI=1ffff1100d9c135e RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff811310ce 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 00007fe1d9ba7900 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=00007fe1d9012f70 CR3=000000000959c000 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=dbcc7e132d0b90bc674e446ba50d7395 XMM02=ec2efd57dc4c00df000000000011b400 XMM03=1ec2d3f7138cd828000000000011b4d0 XMM04=a8d1ba3ee4f5dd2d00000000000ae988 XMM05=6d7fe4a20a10225c0000000000133458 XMM06=00c3ffa147b8d8570000000000132248 XMM07=fb795ef6d65770560000000000121e10 XMM08=2c67c8bc2e329bc3000000000011b470 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c1b04b RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888019c2fa40 RBP=ffff888019c2fa30 RSP=ffff888019c2f968 R8 =ffffffff860d825a R9 =ffff888019c2fa18 R10=0000000000038001 R11=0000000000010b8d R12=ffff888019c2fa38 R13=ffff888019c2fa20 R14=ffff888019c2fb10 R15=ffff888019c2f9d8 RIP=ffffffff81131118 RFL=00000216 [----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 00007f4523d69900 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=00007f45243210b0 CR3=0000000019efe000 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=5f6d61702c78756e696c65735f6d6170 XMM01=2c74696d7265705f6d61702c74696e69 XMM02=2c78696e755f6d61702c74696d726570 XMM03=2c6469756e69676f6c5f6d61702c7875 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2029286e65706f5f7469647561007325 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000