syzkaller login: [ 64.433227] BUG: Bad rss-counter state mm:00000000b63757a6 type:MM_FILEPAGES val:33 [ 64.434232] BUG: Bad rss-counter state mm:00000000b63757a6 type:MM_ANONPAGES val:22 [ 64.599044] ================================================================== [ 64.600005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.600952] Read of size 8 at addr ffff88800f2275c8 by task sshd/221 [ 64.601746] [ 64.601967] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 64.603123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.604149] Call Trace: [ 64.604484] [ 64.604774] dump_stack_lvl+0x91/0xf0 [ 64.605270] print_report+0xcc/0x620 [ 64.605769] ? __virt_addr_valid+0x102/0x340 [ 64.606340] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.606958] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.607586] kasan_report+0xbe/0xf0 [ 64.608081] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.608721] vma_interval_tree_remove+0xc75/0xec0 [ 64.609329] vma_prepare+0xc54/0x11a0 [ 64.609815] __split_vma+0x5af/0x950 [ 64.610291] ? __pfx___split_vma+0x10/0x10 [ 64.610820] ? find_held_lock+0x2c/0x110 [ 64.611338] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.611909] ? lock_is_held_type+0x9f/0x120 [ 64.612450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.613060] ? mtree_range_walk+0x632/0x900 [ 64.613612] ? mas_walk+0x5c7/0x7c0 [ 64.614085] do_vmi_munmap+0x1f1/0x2b0 [ 64.614575] mmap_region+0x1f9/0x2660 [ 64.615057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.615569] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.616306] ? __pfx_lock_acquire+0x10/0x10 [ 64.616848] ? __pfx_mmap_region+0x10/0x10 [ 64.617399] ? security_mmap_addr+0x7d/0xa0 [ 64.617940] ? get_unmapped_area+0x1f5/0x3f0 [ 64.618501] do_mmap+0x854/0xf00 [ 64.618940] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.619451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.620023] ksys_mmap_pgoff+0x3af/0x500 [ 64.620547] do_syscall_64+0x3f/0x90 [ 64.621026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.621678] RIP: 0033:0x7f6c62459d82 [ 64.622146] 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 [ 64.624371] RSP: 002b:00007ffe4c2718e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.625275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c62459d82 [ 64.626122] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c61893000 [ 64.626965] RBP: 00007f6c61893000 R08: 0000000000000009 R09: 0000000000001000 [ 64.627807] R10: 0000000000000812 R11: 0000000000000206 R12: 000056345019eec0 [ 64.628662] R13: 00007ffe4c271900 R14: 00007ffe4c271930 R15: 00007ffe4c271c90 [ 64.629513] [ 64.629804] [ 64.630021] Allocated by task 213: [ 64.630446] kasan_save_stack+0x22/0x50 [ 64.630955] kasan_set_track+0x25/0x30 [ 64.631457] __kasan_slab_alloc+0x59/0x70 [ 64.632002] kmem_cache_alloc+0x16b/0x370 [ 64.632524] vm_area_dup+0x20/0x160 [ 64.632985] __split_vma+0x170/0x950 [ 64.633453] split_vma+0xc6/0x110 [ 64.633898] mprotect_fixup+0x8d2/0xb30 [ 64.634403] do_mprotect_pkey+0x87e/0xd40 [ 64.634924] __x64_sys_mprotect+0x78/0xc0 [ 64.635446] do_syscall_64+0x3f/0x90 [ 64.635933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.636574] [ 64.636795] Freed by task 213: [ 64.637190] kasan_save_stack+0x22/0x50 [ 64.637773] kasan_set_track+0x25/0x30 [ 64.638270] kasan_save_free_info+0x2b/0x50 [ 64.638801] __kasan_slab_free+0x10a/0x190 [ 64.639336] kmem_cache_free+0x10d/0x4d0 [ 64.639864] rcu_core+0x8c8/0x2860 [ 64.640318] __do_softirq+0x1b7/0x7d4 [ 64.640799] [ 64.641017] Last potentially related work creation: [ 64.641621] kasan_save_stack+0x22/0x50 [ 64.642126] __kasan_record_aux_stack+0x8e/0xa0 [ 64.642704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.643352] remove_vma+0x139/0x170 [ 64.643808] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.644396] do_vmi_munmap+0x1f1/0x2b0 [ 64.644893] __vm_munmap+0x138/0x3a0 [ 64.645365] __x64_sys_munmap+0x59/0x80 [ 64.645867] do_syscall_64+0x3f/0x90 [ 64.646348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.647001] [ 64.647216] The buggy address belongs to the object at ffff88800f227570 [ 64.647216] which belongs to the cache vm_area_struct of size 168 [ 64.648700] The buggy address is located 88 bytes inside of [ 64.648700] freed 168-byte region [ffff88800f227570, ffff88800f227618) [ 64.650115] [ 64.650335] The buggy address belongs to the physical page: [ 64.651004] page:00000000aaef2963 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf227 [ 64.652108] memcg:ffff88800d442201 [ 64.652540] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.653193] page_type: 0xffffffff() [ 64.653642] raw: 0100000000000200 ffff88800879fc80 ffffea0000399440 dead000000000002 [ 64.654564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d442201 [ 64.655479] page dumped because: kasan: bad access detected [ 64.656146] [ 64.656362] Memory state around the buggy address: [ 64.656944] ffff88800f227480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.657792] ffff88800f227500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 64.658644] >ffff88800f227580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.659498] ^ [ 64.660169] ffff88800f227600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 64.661032] ffff88800f227680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.661884] ================================================================== [ 64.662925] Disabling lock debugging due to kernel taint [ 66.983310] BUG: Bad rss-counter state mm:000000005145ece4 type:MM_FILEPAGES val:33 [ 66.984065] BUG: Bad rss-counter state mm:000000005145ece4 type:MM_ANONPAGES val:22 [ 67.520184] BUG: Bad rss-counter state mm:00000000e32d18e9 type:MM_FILEPAGES val:33 [ 67.521521] BUG: Bad rss-counter state mm:00000000e32d18e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23419' (ECDSA) to the list of known hosts. 2023/06/19 13:01:12 fuzzer started 2023/06/19 13:01:12 dialing manager at localhost:44161 2023/06/19 13:01:12 checking machine... 2023/06/19 13:01:12 checking revisions... [ 68.213876] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:01:12 testing simple program... [ 68.264459] cgroup: Unknown subsys name 'net' [ 68.317205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:46 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=ffff888008c58000 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=00007ffeb4b2cb48 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=00007fabef71751000005649ac5b7790 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=0000000080000000 RBX=0000000000000002 RCX=ffffffff811431b8 RDX=ffff8880147e3680 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000016140ec0 RSP=ffff888018f6f840 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000080000 R14=0000000000000000 R15=ffff88800f2898c0 RIP=ffffffff814c07eb RFL=00000283 [--S---C] 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 00007fae4c381900 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=00007fae4c938618 CR3=0000000008ede000 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