syzkaller login: [ 42.421988] BUG: Bad rss-counter state mm:0000000090ead8a2 type:MM_FILEPAGES val:33 [ 42.423457] BUG: Bad rss-counter state mm:0000000090ead8a2 type:MM_ANONPAGES val:22 [ 42.570289] ================================================================== [ 42.571241] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.572211] Read of size 8 at addr ffff88800e5c94e0 by task sshd/221 [ 42.573183] [ 42.573417] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.574298] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.575308] Call Trace: [ 42.575642] [ 42.575928] dump_stack_lvl+0x91/0xf0 [ 42.576436] print_report+0xcc/0x620 [ 42.576936] ? __virt_addr_valid+0x102/0x340 [ 42.577531] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.578170] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.578808] kasan_report+0xbe/0xf0 [ 42.579297] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.579949] vma_interval_tree_remove+0xc75/0xec0 [ 42.580576] vma_prepare+0xc54/0x11a0 [ 42.581070] __split_vma+0x5af/0x950 [ 42.581573] ? __pfx___split_vma+0x10/0x10 [ 42.582118] ? find_held_lock+0x2c/0x110 [ 42.582652] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.583240] ? lock_is_held_type+0x9f/0x120 [ 42.583791] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.584424] ? mtree_range_walk+0x632/0x900 [ 42.585000] ? mas_walk+0x5c7/0x7c0 [ 42.585493] do_vmi_munmap+0x1f1/0x2b0 [ 42.586007] mmap_region+0x1f9/0x2660 [ 42.586496] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.587020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.587745] ? __pfx_lock_acquire+0x10/0x10 [ 42.588290] ? __pfx_mmap_region+0x10/0x10 [ 42.588834] ? security_mmap_addr+0x7d/0xa0 [ 42.589398] ? get_unmapped_area+0x1f5/0x3f0 [ 42.589965] do_mmap+0x854/0xf00 [ 42.590422] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.590931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.591503] ksys_mmap_pgoff+0x3af/0x500 [ 42.592027] do_syscall_64+0x3f/0x90 [ 42.592519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.593191] RIP: 0033:0x7fb286681d82 [ 42.593673] 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 [ 42.595850] RSP: 002b:00007ffd28c96908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.596780] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb286681d82 [ 42.597664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb285abb000 [ 42.598529] RBP: 00007fb285abb000 R08: 0000000000000009 R09: 0000000000001000 [ 42.599411] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3945dbb20 [ 42.600287] R13: 00007ffd28c96920 R14: 00007ffd28c96950 R15: 00007ffd28c96cb0 [ 42.601161] [ 42.601479] [ 42.601707] Allocated by task 214: [ 42.602150] kasan_save_stack+0x22/0x50 [ 42.602674] kasan_set_track+0x25/0x30 [ 42.603185] __kasan_slab_alloc+0x59/0x70 [ 42.603731] kmem_cache_alloc+0x16b/0x370 [ 42.604257] vm_area_dup+0x20/0x160 [ 42.604727] __split_vma+0x170/0x950 [ 42.605211] split_vma+0xc6/0x110 [ 42.605672] mprotect_fixup+0x8d2/0xb30 [ 42.606189] do_mprotect_pkey+0x87e/0xd40 [ 42.606721] __x64_sys_mprotect+0x78/0xc0 [ 42.607254] do_syscall_64+0x3f/0x90 [ 42.607746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.608402] [ 42.608627] Freed by task 214: [ 42.609026] kasan_save_stack+0x22/0x50 [ 42.609575] kasan_set_track+0x25/0x30 [ 42.610077] kasan_save_free_info+0x2b/0x50 [ 42.610620] __kasan_slab_free+0x10a/0x190 [ 42.611187] kmem_cache_free+0x10d/0x4d0 [ 42.611705] rcu_core+0x8c8/0x2860 [ 42.612162] __do_softirq+0x1b7/0x7d4 [ 42.612662] [ 42.612884] Last potentially related work creation: [ 42.613522] kasan_save_stack+0x22/0x50 [ 42.614093] __kasan_record_aux_stack+0x8e/0xa0 [ 42.614694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.615368] remove_vma+0x139/0x170 [ 42.615834] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.616405] do_vmi_munmap+0x1f1/0x2b0 [ 42.616903] __vm_munmap+0x138/0x3a0 [ 42.617400] __x64_sys_munmap+0x59/0x80 [ 42.617911] do_syscall_64+0x3f/0x90 [ 42.618406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.619058] [ 42.619276] The buggy address belongs to the object at ffff88800e5c9488 [ 42.619276] which belongs to the cache vm_area_struct of size 168 [ 42.620769] The buggy address is located 88 bytes inside of [ 42.620769] freed 168-byte region [ffff88800e5c9488, ffff88800e5c9530) [ 42.622189] [ 42.622406] The buggy address belongs to the physical page: [ 42.623060] page:00000000428847d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5c9 [ 42.624133] memcg:ffff88800e626301 [ 42.624553] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.625250] page_type: 0xffffffff() [ 42.625708] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 42.626620] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e626301 [ 42.627514] page dumped because: kasan: bad access detected [ 42.628167] [ 42.628383] Memory state around the buggy address: [ 42.628965] ffff88800e5c9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.629829] ffff88800e5c9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.630695] >ffff88800e5c9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.631538] ^ [ 42.632316] ffff88800e5c9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 42.633203] ffff88800e5c9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.634088] ================================================================== [ 42.635041] Disabling lock debugging due to kernel taint [ 45.169847] BUG: Bad rss-counter state mm:00000000673553de type:MM_FILEPAGES val:33 [ 45.171120] BUG: Bad rss-counter state mm:00000000673553de type:MM_ANONPAGES val:22 [ 45.671215] BUG: Bad rss-counter state mm:000000000a6928b9 type:MM_FILEPAGES val:33 [ 45.672840] BUG: Bad rss-counter state mm:000000000a6928b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6917' (ECDSA) to the list of known hosts. 2023/06/19 23:55:33 fuzzer started 2023/06/19 23:55:33 dialing manager at localhost:44161 2023/06/19 23:55:33 checking machine... 2023/06/19 23:55:33 checking revisions... [ 46.401347] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:55:34 testing simple program... [ 46.455276] cgroup: Unknown subsys name 'net' [ 46.494987] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:55:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008d7fa10 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888008d7f978 RBP=ffff888008d70000 RSP=ffff888008d7f920 R8 =0000000000000004 R9 =0000000000000000 R10=ffff888008d7f978 R11=0000000000000128 R12=0000000000000000 R13=ffff888008d7f9a0 R14=ffff888008d70000 R15=ffff888008d7f978 RIP=ffffffff8450d41a RFL=00000247 [---Z-PC] 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 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=00007f0c51e2d650 CR3=000000000c622000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff822443c8 RBP=0000000000008802 RSP=ffff8880141afad8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888009aa2f00 R13=ffff88800e955c00 R14=0000000000000000 R15=ffff8880141afdf0 RIP=ffffffff814c07eb RFL=00000282 [--S----] 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 00007f4744808900 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=00007f4743c95ec0 CR3=000000000d704000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5c867f1de0ffc49c00000000000ae988 XMM05=f992f64b8b2c2b7d0000000000135be0 XMM06=e4cb8bb95a7664b60000000000134a98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000