syzkaller login: [ 32.627892] BUG: Bad rss-counter state mm:0000000096b0da90 type:MM_FILEPAGES val:33 [ 32.629305] BUG: Bad rss-counter state mm:0000000096b0da90 type:MM_ANONPAGES val:22 [ 32.813974] ================================================================== [ 32.814934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.815935] Read of size 8 at addr ffff88800c5374e0 by task sshd/226 [ 32.816847] [ 32.817081] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.817998] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.819042] Call Trace: [ 32.819384] [ 32.819685] dump_stack_lvl+0x91/0xf0 [ 32.820205] print_report+0xcc/0x620 [ 32.820750] ? __virt_addr_valid+0x102/0x340 [ 32.821342] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.822004] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.822667] kasan_report+0xbe/0xf0 [ 32.823172] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.823836] vma_interval_tree_remove+0xc75/0xec0 [ 32.824491] vma_prepare+0xc54/0x11a0 [ 32.825000] __split_vma+0x5af/0x950 [ 32.825504] ? __pfx___split_vma+0x10/0x10 [ 32.826067] ? find_held_lock+0x2c/0x110 [ 32.826619] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.827218] ? lock_is_held_type+0x9f/0x120 [ 32.827793] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.828453] ? mtree_range_walk+0x632/0x900 [ 32.829047] ? mas_walk+0x5c7/0x7c0 [ 32.829554] do_vmi_munmap+0x1f1/0x2b0 [ 32.830078] mmap_region+0x1f9/0x2660 [ 32.830594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.831141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.831899] ? __pfx_lock_acquire+0x10/0x10 [ 32.832474] ? __pfx_mmap_region+0x10/0x10 [ 32.833043] ? security_mmap_addr+0x7d/0xa0 [ 32.833611] ? get_unmapped_area+0x1f5/0x3f0 [ 32.834193] do_mmap+0x854/0xf00 [ 32.834661] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.835190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.835791] ksys_mmap_pgoff+0x3af/0x500 [ 32.836334] do_syscall_64+0x3f/0x90 [ 32.836843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837531] RIP: 0033:0x7fc68168ed82 [ 32.838021] 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 [ 32.840283] RSP: 002b:00007fffeb16da88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.841266] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc68168ed82 [ 32.842163] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc680ac8000 [ 32.843068] RBP: 00007fc680ac8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.843959] R10: 0000000000000812 R11: 0000000000000206 R12: 000055583d193ec0 [ 32.844867] R13: 00007fffeb16daa0 R14: 00007fffeb16dad0 R15: 00007fffeb16de30 [ 32.845778] [ 32.846091] [ 32.846322] Allocated by task 219: [ 32.846778] kasan_save_stack+0x22/0x50 [ 32.847312] kasan_set_track+0x25/0x30 [ 32.847837] __kasan_slab_alloc+0x59/0x70 [ 32.848392] kmem_cache_alloc+0x16b/0x370 [ 32.848962] vm_area_dup+0x20/0x160 [ 32.849445] __split_vma+0x170/0x950 [ 32.849940] split_vma+0xc6/0x110 [ 32.850408] mprotect_fixup+0x8d2/0xb30 [ 32.850940] do_mprotect_pkey+0x87e/0xd40 [ 32.851489] __x64_sys_mprotect+0x78/0xc0 [ 32.852043] do_syscall_64+0x3f/0x90 [ 32.852549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.853226] [ 32.853453] Freed by task 202: [ 32.853867] kasan_save_stack+0x22/0x50 [ 32.854402] kasan_set_track+0x25/0x30 [ 32.854926] kasan_save_free_info+0x2b/0x50 [ 32.855491] __kasan_slab_free+0x10a/0x190 [ 32.856055] kmem_cache_free+0x10d/0x4d0 [ 32.856603] rcu_core+0x8c8/0x2860 [ 32.857074] __do_softirq+0x1b7/0x7d4 [ 32.857578] [ 32.857808] Last potentially related work creation: [ 32.858434] kasan_save_stack+0x22/0x50 [ 32.858967] __kasan_record_aux_stack+0x8e/0xa0 [ 32.859576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.860253] remove_vma+0x139/0x170 [ 32.860750] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.861343] do_vmi_munmap+0x1f1/0x2b0 [ 32.861855] __vm_munmap+0x138/0x3a0 [ 32.862352] __x64_sys_munmap+0x59/0x80 [ 32.862880] do_syscall_64+0x3f/0x90 [ 32.863381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.864065] [ 32.864292] The buggy address belongs to the object at ffff88800c537488 [ 32.864292] which belongs to the cache vm_area_struct of size 168 [ 32.865859] The buggy address is located 88 bytes inside of [ 32.865859] freed 168-byte region [ffff88800c537488, ffff88800c537530) [ 32.867346] [ 32.867577] The buggy address belongs to the physical page: [ 32.868274] page:00000000cef039de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc537 [ 32.869442] memcg:ffff88800d4e4801 [ 32.869898] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.870636] page_type: 0xffffffff() [ 32.871116] raw: 0100000000000200 ffff88800879fc80 ffffea00003a8900 dead000000000007 [ 32.872096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4e4801 [ 32.873143] page dumped because: kasan: bad access detected [ 32.873848] [ 32.874078] Memory state around the buggy address: [ 32.874700] ffff88800c537380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.875612] ffff88800c537400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.876541] >ffff88800c537480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.877453] ^ [ 32.878259] ffff88800c537500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.879169] ffff88800c537580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.880078] ================================================================== [ 32.881288] Disabling lock debugging due to kernel taint [ 34.871905] BUG: Bad rss-counter state mm:000000005cf4c583 type:MM_FILEPAGES val:33 [ 34.873156] BUG: Bad rss-counter state mm:000000005cf4c583 type:MM_ANONPAGES val:22 [ 35.368266] BUG: Bad rss-counter state mm:0000000098ed9112 type:MM_FILEPAGES val:33 [ 35.369494] BUG: Bad rss-counter state mm:0000000098ed9112 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16985' (ECDSA) to the list of known hosts. 2023/06/19 13:44:38 fuzzer started 2023/06/19 13:44:38 dialing manager at localhost:44161 2023/06/19 13:44:38 checking machine... 2023/06/19 13:44:38 checking revisions... [ 36.036580] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:44:38 testing simple program... [ 36.085710] cgroup: Unknown subsys name 'net' [ 36.123725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:44:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d9246c0 RCX=ffffea0000000000 RDX=ffff888008441500 RSI=0000000000000000 RDI=ffff888008441500 RBP=ffff88801cc3f9b0 RSP=ffff88801cc3f980 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000040000 R12=ffff888008441500 R13=ffffea0000364900 R14=ffffffff81802eb3 R15=ffff8880159d8000 RIP=ffffffff8180b14b 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 00007f3eb4fb1900 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=00007f3eb5566650 CR3=0000000013f5e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007f80e38c4470 CR3=0000000013f70000 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=0f0906ab329d08a91244bbbb7c67994d XMM02=000000000011d0b0d59e07bde36eea69 XMM03=000000000011d1d8ec2efd57dc4c00df XMM04=113f77f38eac326200000000000ae988 XMM05=614d804c2f073bfb00000000001353d0 XMM06=13e856d8d71426c800000000001341c0 XMM07=fb795ef6d657705600000000001247c8 XMM08=2c67c8bc2e329bc3000000000011d1d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000