syzkaller login: [ 41.366830] BUG: Bad rss-counter state mm:0000000006800d09 type:MM_FILEPAGES val:33 [ 41.368191] BUG: Bad rss-counter state mm:0000000006800d09 type:MM_ANONPAGES val:22 [ 41.531172] ================================================================== [ 41.532282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.533439] Read of size 8 at addr ffff88800c994228 by task sshd/221 [ 41.534373] [ 41.534639] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.535675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.536873] Call Trace: [ 41.537260] [ 41.537596] dump_stack_lvl+0x91/0xf0 [ 41.538117] print_report+0xcc/0x620 [ 41.538631] ? __virt_addr_valid+0x102/0x340 [ 41.539222] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.539888] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.540552] kasan_report+0xbe/0xf0 [ 41.541075] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.541746] vma_interval_tree_remove+0xc75/0xec0 [ 41.542394] vma_prepare+0xc54/0x11a0 [ 41.542918] __split_vma+0x5af/0x950 [ 41.543437] ? __pfx___split_vma+0x10/0x10 [ 41.544011] ? find_held_lock+0x2c/0x110 [ 41.544580] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.545203] ? lock_is_held_type+0x9f/0x120 [ 41.545793] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.546458] ? mtree_range_walk+0x632/0x900 [ 41.547069] ? mas_walk+0x5c7/0x7c0 [ 41.547590] do_vmi_munmap+0x1f1/0x2b0 [ 41.548132] mmap_region+0x1f9/0x2660 [ 41.548682] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.549246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.550037] ? __pfx_lock_acquire+0x10/0x10 [ 41.550628] ? __pfx_mmap_region+0x10/0x10 [ 41.551208] ? security_mmap_addr+0x7d/0xa0 [ 41.551799] ? get_unmapped_area+0x1f5/0x3f0 [ 41.552406] do_mmap+0x854/0xf00 [ 41.552899] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.553449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.554074] ksys_mmap_pgoff+0x3af/0x500 [ 41.554637] do_syscall_64+0x3f/0x90 [ 41.555164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.555875] RIP: 0033:0x7ff13d6abd82 [ 41.556374] 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 [ 41.558718] RSP: 002b:00007ffc2293c708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.559708] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff13d6abd82 [ 41.560647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff13cae5000 [ 41.561619] RBP: 00007ff13cae5000 R08: 0000000000000009 R09: 0000000000001000 [ 41.562549] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d81891980 [ 41.563475] R13: 00007ffc2293c720 R14: 00007ffc2293c750 R15: 00007ffc2293cab0 [ 41.564417] [ 41.564747] [ 41.565049] Allocated by task 214: [ 41.565519] kasan_save_stack+0x22/0x50 [ 41.566073] kasan_set_track+0x25/0x30 [ 41.566616] __kasan_slab_alloc+0x59/0x70 [ 41.567189] kmem_cache_alloc+0x16b/0x370 [ 41.567758] vm_area_dup+0x20/0x160 [ 41.568254] __split_vma+0x170/0x950 [ 41.568786] split_vma+0xc6/0x110 [ 41.569268] mprotect_fixup+0x8d2/0xb30 [ 41.569814] do_mprotect_pkey+0x87e/0xd40 [ 41.570382] __x64_sys_mprotect+0x78/0xc0 [ 41.570952] do_syscall_64+0x3f/0x90 [ 41.571468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.572172] [ 41.572409] Freed by task 214: [ 41.572844] kasan_save_stack+0x22/0x50 [ 41.573403] kasan_set_track+0x25/0x30 [ 41.573944] kasan_save_free_info+0x2b/0x50 [ 41.574531] __kasan_slab_free+0x10a/0x190 [ 41.575118] kmem_cache_free+0x10d/0x4d0 [ 41.575681] rcu_core+0x8c8/0x2860 [ 41.576178] __do_softirq+0x1b7/0x7d4 [ 41.576712] [ 41.576959] Last potentially related work creation: [ 41.577617] kasan_save_stack+0x22/0x50 [ 41.578161] __kasan_record_aux_stack+0x8e/0xa0 [ 41.578791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.579488] remove_vma+0x139/0x170 [ 41.579994] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.580598] do_vmi_munmap+0x1f1/0x2b0 [ 41.581144] __vm_munmap+0x138/0x3a0 [ 41.581646] __x64_sys_munmap+0x59/0x80 [ 41.582176] do_syscall_64+0x3f/0x90 [ 41.582685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.583373] [ 41.583605] The buggy address belongs to the object at ffff88800c9941d0 [ 41.583605] which belongs to the cache vm_area_struct of size 168 [ 41.585188] The buggy address is located 88 bytes inside of [ 41.585188] freed 168-byte region [ffff88800c9941d0, ffff88800c994278) [ 41.586706] [ 41.586946] The buggy address belongs to the physical page: [ 41.587672] page:00000000bb936714 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc994 [ 41.588869] memcg:ffff88800e44d101 [ 41.589335] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.590042] page_type: 0xffffffff() [ 41.590533] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.591539] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e44d101 [ 41.592507] page dumped because: kasan: bad access detected [ 41.593254] [ 41.593485] Memory state around the buggy address: [ 41.594107] ffff88800c994100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.595032] ffff88800c994180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.595962] >ffff88800c994200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.596899] ^ [ 41.597495] ffff88800c994280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.598427] ffff88800c994300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.599341] ================================================================== [ 41.600369] Disabling lock debugging due to kernel taint [ 43.589181] BUG: Bad rss-counter state mm:00000000880d838a type:MM_FILEPAGES val:33 [ 43.590193] BUG: Bad rss-counter state mm:00000000880d838a type:MM_ANONPAGES val:22 [ 44.140791] BUG: Bad rss-counter state mm:0000000027c9dc01 type:MM_FILEPAGES val:33 [ 44.142027] BUG: Bad rss-counter state mm:0000000027c9dc01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56280' (ECDSA) to the list of known hosts. 2023/06/20 04:25:37 fuzzer started 2023/06/20 04:25:37 dialing manager at localhost:44161 2023/06/20 04:25:37 checking machine... 2023/06/20 04:25:37 checking revisions... [ 44.789955] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:25:38 testing simple program... [ 44.851245] cgroup: Unknown subsys name 'net' [ 44.892555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:26 Registers: info registers vcpu 0 RAX=ffffffff8196f60b RBX=ffffffff85e14dec RCX=ffffffff8196f61f RDX=0000000000000000 RSI=ffffffff8615bade RDI=ffffffff85e14de0 RBP=ffffffff85e14df0 RSP=ffff88800d927580 R8 =ffffffff8615bade R9 =ffff88800d927678 R10=0000000000038001 R11=0000000000026e83 R12=ffffffff85e14dec R13=ffffffff85e14de0 R14=000000000000000c R15=dffffc0000000000 RIP=ffffffff8112fca7 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7b672b0900 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=00007f7b667d1028 CR3=000000000cb24000 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=00000000000fbe305e5c10884646930b XMM01=000000000011e408b3285ca56c489dff XMM02=000000000011e5b8d59e07bde36eea69 XMM03=000000000011e6e0ec2efd57dc4c00df XMM04=d71d52e6567840e100000000000ae988 XMM05=a9343d166660df350000000000135db0 XMM06=5bcb1cb16bc01bce0000000000134b50 XMM07=fb795ef6d65770560000000000125080 XMM08=2c67c8bc2e329bc3000000000011e6e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffde0a9e658 CR3=0000000005482000 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=00007f1efd5545100000564dd075f790 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