syzkaller login: [ 30.704965] BUG: Bad rss-counter state mm:00000000b648d035 type:MM_FILEPAGES val:33 [ 30.706192] BUG: Bad rss-counter state mm:00000000b648d035 type:MM_ANONPAGES val:22 [ 30.752881] ================================================================== [ 30.753937] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.754984] Read of size 8 at addr ffff888019d3b798 by task sshd/221 [ 30.755851] [ 30.756098] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.757085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.758160] Call Trace: [ 30.758526] [ 30.758848] dump_stack_lvl+0x91/0xf0 [ 30.759398] print_report+0xcc/0x620 [ 30.759949] ? __virt_addr_valid+0x102/0x340 [ 30.760579] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761985] kasan_report+0xbe/0xf0 [ 30.762514] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.763253] vma_interval_tree_remove+0xc75/0xec0 [ 30.763958] vma_prepare+0xc54/0x11a0 [ 30.764504] __split_vma+0x5af/0x950 [ 30.765084] ? __pfx___split_vma+0x10/0x10 [ 30.765694] ? find_held_lock+0x2c/0x110 [ 30.766293] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.766935] ? lock_is_held_type+0x9f/0x120 [ 30.767547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.768223] ? mtree_range_walk+0x632/0x900 [ 30.768852] ? mas_walk+0x5c7/0x7c0 [ 30.769425] do_vmi_munmap+0x1f1/0x2b0 [ 30.769997] mmap_region+0x1f9/0x2660 [ 30.770528] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.771131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.771939] ? __pfx_lock_acquire+0x10/0x10 [ 30.772557] ? __pfx_mmap_region+0x10/0x10 [ 30.773198] ? security_mmap_addr+0x7d/0xa0 [ 30.773808] ? get_unmapped_area+0x1f5/0x3f0 [ 30.774427] do_mmap+0x854/0xf00 [ 30.774937] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.775502] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.776167] ksys_mmap_pgoff+0x3af/0x500 [ 30.776755] do_syscall_64+0x3f/0x90 [ 30.777340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.778101] RIP: 0033:0x7ff3614b5d82 [ 30.778620] 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 [ 30.781116] RSP: 002b:00007ffeb76df268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.782110] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3614b5d82 [ 30.783048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3608ef000 [ 30.783957] RBP: 00007ff3608ef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.784861] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e733ca6ec0 [ 30.785791] R13: 00007ffeb76df280 R14: 00007ffeb76df2b0 R15: 00007ffeb76df610 [ 30.786718] [ 30.787039] [ 30.787266] Allocated by task 214: [ 30.787724] kasan_save_stack+0x22/0x50 [ 30.788268] kasan_set_track+0x25/0x30 [ 30.788802] __kasan_slab_alloc+0x59/0x70 [ 30.789371] kmem_cache_alloc+0x16b/0x370 [ 30.789928] vm_area_dup+0x20/0x160 [ 30.790413] __split_vma+0x170/0x950 [ 30.790913] split_vma+0xc6/0x110 [ 30.791386] mprotect_fixup+0x8d2/0xb30 [ 30.791926] do_mprotect_pkey+0x87e/0xd40 [ 30.792503] __x64_sys_mprotect+0x78/0xc0 [ 30.793072] do_syscall_64+0x3f/0x90 [ 30.793594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.794281] [ 30.794512] Freed by task 214: [ 30.794924] kasan_save_stack+0x22/0x50 [ 30.795465] kasan_set_track+0x25/0x30 [ 30.795994] kasan_save_free_info+0x2b/0x50 [ 30.796562] __kasan_slab_free+0x10a/0x190 [ 30.797144] kmem_cache_free+0x10d/0x4d0 [ 30.797686] rcu_core+0x8c8/0x2860 [ 30.798162] __do_softirq+0x1b7/0x7d4 [ 30.798673] [ 30.798904] Last potentially related work creation: [ 30.799533] kasan_save_stack+0x22/0x50 [ 30.800063] __kasan_record_aux_stack+0x8e/0xa0 [ 30.800678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.801373] remove_vma+0x139/0x170 [ 30.801852] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.802440] do_vmi_munmap+0x1f1/0x2b0 [ 30.802961] __vm_munmap+0x138/0x3a0 [ 30.803461] __x64_sys_munmap+0x59/0x80 [ 30.803993] do_syscall_64+0x3f/0x90 [ 30.804510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805219] [ 30.805449] The buggy address belongs to the object at ffff888019d3b740 [ 30.805449] which belongs to the cache vm_area_struct of size 168 [ 30.807025] The buggy address is located 88 bytes inside of [ 30.807025] freed 168-byte region [ffff888019d3b740, ffff888019d3b7e8) [ 30.808538] [ 30.808769] The buggy address belongs to the physical page: [ 30.809488] page:000000002d9a54db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d3b [ 30.810667] memcg:ffff888016beb301 [ 30.811134] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.811819] page_type: 0xffffffff() [ 30.812298] raw: 0100000000000200 ffff8880087a0c80 ffffea00005afb00 0000000000000002 [ 30.813287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016beb301 [ 30.814252] page dumped because: kasan: bad access detected [ 30.814964] [ 30.815191] Memory state around the buggy address: [ 30.815813] ffff888019d3b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.816723] ffff888019d3b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.817648] >ffff888019d3b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.818565] ^ [ 30.819091] ffff888019d3b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.820008] ffff888019d3b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.820940] ================================================================== [ 30.822401] Disabling lock debugging due to kernel taint [ 32.787666] BUG: Bad rss-counter state mm:00000000286cd92a type:MM_FILEPAGES val:33 [ 32.788820] BUG: Bad rss-counter state mm:00000000286cd92a type:MM_ANONPAGES val:22 [ 33.260549] BUG: Bad rss-counter state mm:000000001711b359 type:MM_FILEPAGES val:33 [ 33.262050] BUG: Bad rss-counter state mm:000000001711b359 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54845' (ECDSA) to the list of known hosts. 2023/06/21 05:54:56 fuzzer started 2023/06/21 05:54:56 dialing manager at localhost:36067 2023/06/21 05:54:56 checking machine... 2023/06/21 05:54:56 checking revisions... [ 33.997991] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:54:56 testing simple program... [ 34.042615] cgroup: Unknown subsys name 'net' [ 34.085561] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015958000 RSI=ffffffff818949a8 RDI=0000000000000005 RBP=ffff88800b670c98 RSP=ffff88800fbcf9d0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800fbcfc48 R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff8880158ee621 RIP=ffffffff814c089b 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 00007ff8e53da900 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=00007ff8e59920b0 CR3=0000000016716000 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=1ffff11002038613 RBX=ffff8880101c3068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880101c3098 RBP=ffff88800edc4000 RSP=ffff888008e37c98 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800edb5b80 R14=ffffffff8186b835 R15=ffff88800e6c1b00 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007f2e636f0db0 CR3=000000000c58e000 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=9a08848175240cb800000000000ae988 XMM05=28f58a1c45f0210e0000000000133808 XMM06=c291bd5c70af25b900000000001325f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000