syzkaller login: [ 61.455266] BUG: Bad rss-counter state mm:00000000ba18af5a type:MM_FILEPAGES val:33 [ 61.456830] BUG: Bad rss-counter state mm:00000000ba18af5a type:MM_ANONPAGES val:22 [ 61.607554] ================================================================== [ 61.608480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.609413] Read of size 8 at addr ffff88801038ab38 by task sshd/223 [ 61.610179] [ 61.610507] CPU: 0 PID: 223 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 61.611523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.612515] Call Trace: [ 61.612840] [ 61.613123] dump_stack_lvl+0x91/0xf0 [ 61.613615] print_report+0xcc/0x620 [ 61.614103] ? __virt_addr_valid+0x102/0x340 [ 61.614653] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.615272] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.615886] kasan_report+0xbe/0xf0 [ 61.616362] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.617009] vma_interval_tree_remove+0xc75/0xec0 [ 61.617654] vma_prepare+0xc54/0x11a0 [ 61.618163] __split_vma+0x5af/0x950 [ 61.618678] ? __pfx___split_vma+0x10/0x10 [ 61.619262] ? find_held_lock+0x2c/0x110 [ 61.619833] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.620458] ? lock_is_held_type+0x9f/0x120 [ 61.621062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.621723] ? mtree_range_walk+0x632/0x900 [ 61.622317] ? mas_walk+0x5c7/0x7c0 [ 61.622827] do_vmi_munmap+0x1f1/0x2b0 [ 61.623365] mmap_region+0x1f9/0x2660 [ 61.623899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.624456] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.625250] ? __pfx_lock_acquire+0x10/0x10 [ 61.625832] ? __pfx_mmap_region+0x10/0x10 [ 61.626414] ? security_mmap_addr+0x7d/0xa0 [ 61.626991] ? get_unmapped_area+0x1f5/0x3f0 [ 61.627593] do_mmap+0x854/0xf00 [ 61.628072] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.628641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.629266] ksys_mmap_pgoff+0x3af/0x500 [ 61.629817] do_syscall_64+0x3f/0x90 [ 61.630341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.631028] RIP: 0033:0x7f632c898d82 [ 61.631526] 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 [ 61.633821] RSP: 002b:00007ffc23c781a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.634803] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f632c898d82 [ 61.635722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f632bcd2000 [ 61.636652] RBP: 00007f632bcd2000 R08: 0000000000000009 R09: 0000000000001000 [ 61.637573] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c90c8dcf60 [ 61.638495] R13: 00007ffc23c781c0 R14: 00007ffc23c781f0 R15: 00007ffc23c78550 [ 61.639415] [ 61.639735] [ 61.639976] Allocated by task 215: [ 61.640456] kasan_save_stack+0x22/0x50 [ 61.641026] kasan_set_track+0x25/0x30 [ 61.641566] __kasan_slab_alloc+0x59/0x70 [ 61.642139] kmem_cache_alloc+0x16b/0x370 [ 61.642695] vm_area_dup+0x20/0x160 [ 61.643198] __split_vma+0x170/0x950 [ 61.643706] split_vma+0xc6/0x110 [ 61.644180] mprotect_fixup+0x8d2/0xb30 [ 61.644745] do_mprotect_pkey+0x87e/0xd40 [ 61.645308] __x64_sys_mprotect+0x78/0xc0 [ 61.645873] do_syscall_64+0x3f/0x90 [ 61.646397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.647098] [ 61.647339] Freed by task 215: [ 61.647764] kasan_save_stack+0x22/0x50 [ 61.648301] kasan_set_track+0x25/0x30 [ 61.648875] kasan_save_free_info+0x2b/0x50 [ 61.649449] __kasan_slab_free+0x10a/0x190 [ 61.650018] kmem_cache_free+0x10d/0x4d0 [ 61.650571] rcu_core+0x8c8/0x2860 [ 61.651060] __do_softirq+0x1b7/0x7d4 [ 61.651576] [ 61.651813] Last potentially related work creation: [ 61.652465] kasan_save_stack+0x22/0x50 [ 61.653042] __kasan_record_aux_stack+0x8e/0xa0 [ 61.653673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.654381] remove_vma+0x139/0x170 [ 61.654872] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.655481] do_vmi_munmap+0x1f1/0x2b0 [ 61.656000] __vm_munmap+0x138/0x3a0 [ 61.656526] __x64_sys_munmap+0x59/0x80 [ 61.657064] do_syscall_64+0x3f/0x90 [ 61.657582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.658293] [ 61.658535] The buggy address belongs to the object at ffff88801038aae0 [ 61.658535] which belongs to the cache vm_area_struct of size 168 [ 61.660144] The buggy address is located 88 bytes inside of [ 61.660144] freed 168-byte region [ffff88801038aae0, ffff88801038ab88) [ 61.661719] [ 61.661955] The buggy address belongs to the physical page: [ 61.662672] page:00000000ebc156cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038a [ 61.663858] memcg:ffff888010388001 [ 61.664321] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.665103] page_type: 0xffffffff() [ 61.665598] raw: 0100000000000200 ffff88800879fc80 ffffea000061e180 dead000000000007 [ 61.666604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010388001 [ 61.667602] page dumped because: kasan: bad access detected [ 61.668334] [ 61.668582] Memory state around the buggy address: [ 61.669213] ffff88801038aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.670158] ffff88801038aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 61.671110] >ffff88801038ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.672057] ^ [ 61.672752] ffff88801038ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.673671] ffff88801038ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.674605] ================================================================== [ 61.675659] Disabling lock debugging due to kernel taint [ 63.457139] BUG: Bad rss-counter state mm:0000000072227838 type:MM_FILEPAGES val:33 [ 63.458150] BUG: Bad rss-counter state mm:0000000072227838 type:MM_ANONPAGES val:22 [ 63.983747] BUG: Bad rss-counter state mm:00000000cd6a00be type:MM_FILEPAGES val:33 [ 63.984940] BUG: Bad rss-counter state mm:00000000cd6a00be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14666' (ECDSA) to the list of known hosts. 2023/06/19 11:40:33 fuzzer started 2023/06/19 11:40:34 dialing manager at localhost:44161 2023/06/19 11:40:34 checking machine... 2023/06/19 11:40:34 checking revisions... [ 64.609027] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:40:34 testing simple program... [ 64.652237] cgroup: Unknown subsys name 'net' [ 64.702699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:02 Registers: info registers vcpu 0 RAX=ffff888015858001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015857a01 RSI=ffff888015857a88 RDI=ffff88806ce09aa8 RBP=ffff888015857a88 RSP=ffff88806ce09a00 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff888015850000 R14=ffff888015857a90 R15=ffff88806ce09a98 RIP=ffffffff811304ce 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 00007fa7be10c900 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=000055ea5e78b768 CR3=000000000ca1e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c8e8d4ac739e278100000000000ae988 XMM05=153b6d6d98854da200000000001398c0 XMM06=db20f175d54767f00000000000138960 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=1ffff110013334c6 RDX=1ffff110013334d3 RSI=0000000000000004 RDI=ffff88800999a6a0 RBP=0000000000000020 RSP=ffff88800eef7bc8 R8 =0000000000000001 R9 =ffffed10013334d0 R10=ffff88800999a683 R11=00000000000b6996 R12=ffff8880165f8140 R13=0000000000000000 R14=ffff88800999a638 R15=ffff88800999a5f0 RIP=ffffffff818472d5 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 00007fc0e340b900 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=00007fc0e39c2618 CR3=000000000d852000 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