syzkaller login: [ 30.152943] BUG: Bad rss-counter state mm:000000002619a283 type:MM_FILEPAGES val:33 [ 30.154371] BUG: Bad rss-counter state mm:000000002619a283 type:MM_ANONPAGES val:22 [ 30.299960] ================================================================== [ 30.301142] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.302334] Read of size 8 at addr ffff888018d93798 by task sshd/221 [ 30.303410] [ 30.303686] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.304722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.305887] Call Trace: [ 30.306269] [ 30.306610] dump_stack_lvl+0x91/0xf0 [ 30.307202] print_report+0xcc/0x620 [ 30.307811] ? __virt_addr_valid+0x102/0x340 [ 30.308386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.309003] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.309621] kasan_report+0xbe/0xf0 [ 30.310108] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310730] vma_interval_tree_remove+0xc75/0xec0 [ 30.311336] vma_prepare+0xc54/0x11a0 [ 30.311832] __split_vma+0x5af/0x950 [ 30.312299] ? __pfx___split_vma+0x10/0x10 [ 30.312820] ? find_held_lock+0x2c/0x110 [ 30.313340] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.313914] ? lock_is_held_type+0x9f/0x120 [ 30.314454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.315057] ? mtree_range_walk+0x632/0x900 [ 30.315618] ? mas_walk+0x5c7/0x7c0 [ 30.316094] do_vmi_munmap+0x1f1/0x2b0 [ 30.316588] mmap_region+0x1f9/0x2660 [ 30.317078] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.317588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.318310] ? __pfx_lock_acquire+0x10/0x10 [ 30.318845] ? __pfx_mmap_region+0x10/0x10 [ 30.319391] ? security_mmap_addr+0x7d/0xa0 [ 30.319922] ? get_unmapped_area+0x1f5/0x3f0 [ 30.320475] do_mmap+0x854/0xf00 [ 30.320913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.321411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.321967] ksys_mmap_pgoff+0x3af/0x500 [ 30.322473] do_syscall_64+0x3f/0x90 [ 30.322955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.323612] RIP: 0033:0x7fd480125d82 [ 30.324072] 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 [ 30.326209] RSP: 002b:00007ffd929ef898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.327112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd480125d82 [ 30.327963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd47f55f000 [ 30.328807] RBP: 00007fd47f55f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.329661] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e228448ec0 [ 30.330501] R13: 00007ffd929ef8b0 R14: 00007ffd929ef8e0 R15: 00007ffd929efc40 [ 30.331357] [ 30.331674] [ 30.331889] Allocated by task 214: [ 30.332322] kasan_save_stack+0x22/0x50 [ 30.332824] kasan_set_track+0x25/0x30 [ 30.333313] __kasan_slab_alloc+0x59/0x70 [ 30.333846] kmem_cache_alloc+0x16b/0x370 [ 30.334362] vm_area_dup+0x20/0x160 [ 30.334816] __split_vma+0x170/0x950 [ 30.335280] split_vma+0xc6/0x110 [ 30.335724] mprotect_fixup+0x8d2/0xb30 [ 30.336232] do_mprotect_pkey+0x87e/0xd40 [ 30.336751] __x64_sys_mprotect+0x78/0xc0 [ 30.337270] do_syscall_64+0x3f/0x90 [ 30.337744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338388] [ 30.338605] Freed by task 214: [ 30.339002] kasan_save_stack+0x22/0x50 [ 30.339510] kasan_set_track+0x25/0x30 [ 30.340018] kasan_save_free_info+0x2b/0x50 [ 30.340551] __kasan_slab_free+0x10a/0x190 [ 30.341089] kmem_cache_free+0x10d/0x4d0 [ 30.341590] rcu_core+0x8c8/0x2860 [ 30.342039] __do_softirq+0x1b7/0x7d4 [ 30.342517] [ 30.342729] Last potentially related work creation: [ 30.343312] kasan_save_stack+0x22/0x50 [ 30.343873] __kasan_record_aux_stack+0x8e/0xa0 [ 30.344456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.345103] remove_vma+0x139/0x170 [ 30.345556] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.346110] do_vmi_munmap+0x1f1/0x2b0 [ 30.346599] __vm_munmap+0x138/0x3a0 [ 30.347062] __x64_sys_munmap+0x59/0x80 [ 30.347572] do_syscall_64+0x3f/0x90 [ 30.348046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.348689] [ 30.348904] The buggy address belongs to the object at ffff888018d93740 [ 30.348904] which belongs to the cache vm_area_struct of size 168 [ 30.350376] The buggy address is located 88 bytes inside of [ 30.350376] freed 168-byte region [ffff888018d93740, ffff888018d937e8) [ 30.351798] [ 30.352012] The buggy address belongs to the physical page: [ 30.352667] page:00000000df741f2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d93 [ 30.353753] memcg:ffff88800c48d901 [ 30.354181] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.354823] page_type: 0xffffffff() [ 30.355279] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.356210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c48d901 [ 30.357110] page dumped because: kasan: bad access detected [ 30.357772] [ 30.357986] Memory state around the buggy address: [ 30.358566] ffff888018d93680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.359439] ffff888018d93700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.360292] >ffff888018d93780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.361138] ^ [ 30.361632] ffff888018d93800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.362477] ffff888018d93880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.363322] ================================================================== [ 30.364243] Disabling lock debugging due to kernel taint [ 32.255377] BUG: Bad rss-counter state mm:00000000170bf332 type:MM_FILEPAGES val:33 [ 32.256377] BUG: Bad rss-counter state mm:00000000170bf332 type:MM_ANONPAGES val:22 [ 32.816559] BUG: Bad rss-counter state mm:000000009fb89271 type:MM_FILEPAGES val:33 [ 32.817719] BUG: Bad rss-counter state mm:000000009fb89271 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42314' (ECDSA) to the list of known hosts. 2023/06/20 14:20:07 fuzzer started 2023/06/20 14:20:07 dialing manager at localhost:36067 2023/06/20 14:20:07 checking machine... 2023/06/20 14:20:07 checking revisions... [ 33.481845] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:20:07 testing simple program... [ 33.529882] cgroup: Unknown subsys name 'net' [ 33.582249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83639d72 RDX=ffff88800ec33680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000010 RSP=ffff88801b24fe18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000003 R13=0000000000000000 R14=ffff888015cea280 R15=0000000000000000 RIP=ffffffff814c0860 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 00007f65317fc900 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=00007f6531db3618 CR3=000000000e9a0000 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=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=0000000000000008 RSI=ffff88806cf09f78 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a18 R8 =ffffffff860d2fe0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f80 R15=ffff88806cf09a98 RIP=ffffffff811303fc 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 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=00007f7082e32bc0 CR3=000000000f2a8000 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=856b47102cf7d1bc6e48a7a6ce533b6b XMM02=2c67c8bc2e329bc3000000000011b960 XMM03=fb795ef6d65770560000000000122708 XMM04=9c31fb588c7771b900000000000ae988 XMM05=c45c12fca641d4900000000000133318 XMM06=c291bd5c70af25b900000000001323b8 XMM07=e042d86d42eb936e0000000000122988 XMM08=075af60c9d266bbe000000000011b9c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000