syzkaller login: [ 30.936805] BUG: Bad rss-counter state mm:00000000abff61b5 type:MM_FILEPAGES val:33 [ 30.938255] BUG: Bad rss-counter state mm:00000000abff61b5 type:MM_ANONPAGES val:22 [ 31.080854] ================================================================== [ 31.081935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.083043] Read of size 8 at addr ffff88800d2f0d08 by task sshd/221 [ 31.084089] [ 31.084322] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.085206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.086215] Call Trace: [ 31.086533] [ 31.086821] dump_stack_lvl+0x91/0xf0 [ 31.087320] print_report+0xcc/0x620 [ 31.087821] ? __virt_addr_valid+0x102/0x340 [ 31.088380] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089013] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.089636] kasan_report+0xbe/0xf0 [ 31.090126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.090756] vma_interval_tree_remove+0xc75/0xec0 [ 31.091361] vma_prepare+0xc54/0x11a0 [ 31.091870] __split_vma+0x5af/0x950 [ 31.092355] ? __pfx___split_vma+0x10/0x10 [ 31.092905] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 31.093551] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.094129] ? lock_is_held_type+0x9f/0x120 [ 31.094684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.095305] ? mtree_range_walk+0x632/0x900 [ 31.095882] ? mas_walk+0x5c7/0x7c0 [ 31.096368] do_vmi_munmap+0x1f1/0x2b0 [ 31.096873] mmap_region+0x1f9/0x2660 [ 31.097358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.097880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.098599] ? __pfx_lock_acquire+0x10/0x10 [ 31.099143] ? __pfx_mmap_region+0x10/0x10 [ 31.099676] ? security_mmap_addr+0x7d/0xa0 [ 31.100226] ? get_unmapped_area+0x1f5/0x3f0 [ 31.100777] do_mmap+0x854/0xf00 [ 31.101223] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.101721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.102286] ksys_mmap_pgoff+0x3af/0x500 [ 31.102807] do_syscall_64+0x3f/0x90 [ 31.103293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103963] RIP: 0033:0x7fa76e0ccd82 [ 31.104419] 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 [ 31.106563] RSP: 002b:00007ffcdea32098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.107489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa76e0ccd82 [ 31.108360] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa76d506000 [ 31.109218] RBP: 00007fa76d506000 R08: 0000000000000009 R09: 0000000000001000 [ 31.110076] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d52022ec0 [ 31.110921] R13: 00007ffcdea320b0 R14: 00007ffcdea320e0 R15: 00007ffcdea32440 [ 31.111797] [ 31.112113] [ 31.112332] Allocated by task 214: [ 31.112767] kasan_save_stack+0x22/0x50 [ 31.113294] kasan_set_track+0x25/0x30 [ 31.113794] __kasan_slab_alloc+0x59/0x70 [ 31.114330] kmem_cache_alloc+0x16b/0x370 [ 31.114847] vm_area_dup+0x20/0x160 [ 31.115305] __split_vma+0x170/0x950 [ 31.115776] split_vma+0xc6/0x110 [ 31.116231] mprotect_fixup+0x8d2/0xb30 [ 31.116737] do_mprotect_pkey+0x87e/0xd40 [ 31.117262] __x64_sys_mprotect+0x78/0xc0 [ 31.117786] do_syscall_64+0x3f/0x90 [ 31.118263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.118917] [ 31.119136] Freed by task 203: [ 31.119526] kasan_save_stack+0x22/0x50 [ 31.120039] kasan_set_track+0x25/0x30 [ 31.120545] kasan_save_free_info+0x2b/0x50 [ 31.121086] __kasan_slab_free+0x10a/0x190 [ 31.121628] kmem_cache_free+0x10d/0x4d0 [ 31.122152] rcu_core+0x8c8/0x2860 [ 31.122602] __do_softirq+0x1b7/0x7d4 [ 31.123086] [ 31.123302] Last potentially related work creation: [ 31.123917] kasan_save_stack+0x22/0x50 [ 31.124424] __kasan_record_aux_stack+0x8e/0xa0 [ 31.125017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.125717] remove_vma+0x139/0x170 [ 31.126182] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.126751] do_vmi_munmap+0x1f1/0x2b0 [ 31.127256] __vm_munmap+0x138/0x3a0 [ 31.127730] __x64_sys_munmap+0x59/0x80 [ 31.128241] do_syscall_64+0x3f/0x90 [ 31.128723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129378] [ 31.129601] Second to last potentially related work creation: [ 31.130288] kasan_save_stack+0x22/0x50 [ 31.130808] __kasan_record_aux_stack+0x8e/0xa0 [ 31.131393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.132063] remove_vma+0x139/0x170 [ 31.132523] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.133094] do_vmi_munmap+0x1f1/0x2b0 [ 31.133593] mmap_region+0x1f9/0x2660 [ 31.134072] do_mmap+0x854/0xf00 [ 31.134513] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135014] ksys_mmap_pgoff+0x7d/0x500 [ 31.135518] do_syscall_64+0x3f/0x90 [ 31.136003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136652] [ 31.136869] The buggy address belongs to the object at ffff88800d2f0cb0 [ 31.136869] which belongs to the cache vm_area_struct of size 168 [ 31.138358] The buggy address is located 88 bytes inside of [ 31.138358] freed 168-byte region [ffff88800d2f0cb0, ffff88800d2f0d58) [ 31.139785] [ 31.140023] The buggy address belongs to the physical page: [ 31.140690] page:00000000e8cd8cd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd2f0 [ 31.141779] memcg:ffff88800d7a5401 [ 31.142210] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.142910] page_type: 0xffffffff() [ 31.143365] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354ec0 dead000000000007 [ 31.144305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7a5401 [ 31.145239] page dumped because: kasan: bad access detected [ 31.145905] [ 31.146123] Memory state around the buggy address: [ 31.146710] ffff88800d2f0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.147566] ffff88800d2f0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.148457] >ffff88800d2f0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.149332] ^ [ 31.149772] ffff88800d2f0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.150645] ffff88800d2f0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.151498] ================================================================== [ 31.152504] Disabling lock debugging due to kernel taint [ 33.028262] BUG: Bad rss-counter state mm:00000000c0397f8c type:MM_FILEPAGES val:33 [ 33.028976] BUG: Bad rss-counter state mm:00000000c0397f8c type:MM_ANONPAGES val:22 [ 33.467506] BUG: Bad rss-counter state mm:0000000020c51f0e type:MM_FILEPAGES val:33 [ 33.468229] BUG: Bad rss-counter state mm:0000000020c51f0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61518' (ECDSA) to the list of known hosts. 2023/06/20 22:04:21 fuzzer started 2023/06/20 22:04:21 dialing manager at localhost:36067 2023/06/20 22:04:21 checking machine... 2023/06/20 22:04:21 checking revisions... [ 34.154769] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:04:22 testing simple program... [ 34.204905] cgroup: Unknown subsys name 'net' [ 34.263279] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:21 Registers: info registers vcpu 0 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=1ffffffff0c13012 RDI=ffffffff85d92c20 RBP=ffff888015b9fa88 RSP=ffff888015b9f970 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888015b9fa90 R13=ffff888015b9fa78 R14=ffff888015b9fa71 R15=ffff888015b9fa30 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007f75ab272900 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=00007f75ab829618 CR3=0000000015ac6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f65b9b99000 CR3=00000000096ba000 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=9e65077ee9bb36b97d4c72754551f6ff XMM02=000000000011bda8eff9b2d0a8fce9cb XMM03=000000000011be782c67c8bc2e329bc3 XMM04=8222428a72a90bfe00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133a48 XMM06=c291bd5c70af25b900000000001338d0 XMM07=e042d86d42eb936e0000000000122a70 XMM08=ae7bc03ab700410c000000000011be78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000