syzkaller login: [ 31.543905] BUG: Bad rss-counter state mm:0000000086e75216 type:MM_FILEPAGES val:33 [ 31.544671] BUG: Bad rss-counter state mm:0000000086e75216 type:MM_ANONPAGES val:22 [ 31.700705] ================================================================== [ 31.701622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.702570] Read of size 8 at addr ffff8880163a14e0 by task sshd/220 [ 31.703355] [ 31.703577] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.704701] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.705697] Call Trace: [ 31.706049] [ 31.706340] dump_stack_lvl+0x91/0xf0 [ 31.706841] print_report+0xcc/0x620 [ 31.707331] ? __virt_addr_valid+0x102/0x340 [ 31.707892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.708521] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.709148] kasan_report+0xbe/0xf0 [ 31.709622] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.710259] vma_interval_tree_remove+0xc75/0xec0 [ 31.710861] vma_prepare+0xc54/0x11a0 [ 31.711345] __split_vma+0x5af/0x950 [ 31.711819] ? __pfx___split_vma+0x10/0x10 [ 31.712348] ? find_held_lock+0x2c/0x110 [ 31.712873] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.713439] ? lock_is_held_type+0x9f/0x120 [ 31.714001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.714619] ? mtree_range_walk+0x632/0x900 [ 31.715171] ? mas_walk+0x5c7/0x7c0 [ 31.715643] do_vmi_munmap+0x1f1/0x2b0 [ 31.716137] mmap_region+0x1f9/0x2660 [ 31.716631] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.717143] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.717875] ? __pfx_lock_acquire+0x10/0x10 [ 31.718405] ? __pfx_mmap_region+0x10/0x10 [ 31.718936] ? security_mmap_addr+0x7d/0xa0 [ 31.719469] ? get_unmapped_area+0x1f5/0x3f0 [ 31.720024] do_mmap+0x854/0xf00 [ 31.720468] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.720957] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.721551] ksys_mmap_pgoff+0x3af/0x500 [ 31.722081] do_syscall_64+0x3f/0x90 [ 31.722556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723207] RIP: 0033:0x7fa131ba7d82 [ 31.723661] 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 [ 31.725784] RSP: 002b:00007ffdfebaf438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.726685] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa131ba7d82 [ 31.727525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa130fe1000 [ 31.728361] RBP: 00007fa130fe1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.729197] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586eb714b20 [ 31.730040] R13: 00007ffdfebaf450 R14: 00007ffdfebaf480 R15: 00007ffdfebaf7e0 [ 31.730890] [ 31.731185] [ 31.731398] Allocated by task 213: [ 31.731820] kasan_save_stack+0x22/0x50 [ 31.732320] kasan_set_track+0x25/0x30 [ 31.732807] __kasan_slab_alloc+0x59/0x70 [ 31.733327] kmem_cache_alloc+0x16b/0x370 [ 31.733853] vm_area_dup+0x20/0x160 [ 31.734302] __split_vma+0x170/0x950 [ 31.734765] split_vma+0xc6/0x110 [ 31.735197] mprotect_fixup+0x8d2/0xb30 [ 31.735691] do_mprotect_pkey+0x87e/0xd40 [ 31.736206] __x64_sys_mprotect+0x78/0xc0 [ 31.736721] do_syscall_64+0x3f/0x90 [ 31.737193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.737845] [ 31.738058] Freed by task 203: [ 31.738449] kasan_save_stack+0x22/0x50 [ 31.738942] kasan_set_track+0x25/0x30 [ 31.739431] kasan_save_free_info+0x2b/0x50 [ 31.739954] __kasan_slab_free+0x10a/0x190 [ 31.740477] kmem_cache_free+0x10d/0x4d0 [ 31.740978] rcu_core+0x8c8/0x2860 [ 31.741422] __do_softirq+0x1b7/0x7d4 [ 31.741903] [ 31.742114] Last potentially related work creation: [ 31.742688] kasan_save_stack+0x22/0x50 [ 31.743340] __kasan_record_aux_stack+0x8e/0xa0 [ 31.744034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.744675] remove_vma+0x139/0x170 [ 31.745156] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.745804] do_vmi_munmap+0x1f1/0x2b0 [ 31.746290] __vm_munmap+0x138/0x3a0 [ 31.746755] __x64_sys_munmap+0x59/0x80 [ 31.747250] do_syscall_64+0x3f/0x90 [ 31.747728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.748361] [ 31.748574] The buggy address belongs to the object at ffff8880163a1488 [ 31.748574] which belongs to the cache vm_area_struct of size 168 [ 31.750100] The buggy address is located 88 bytes inside of [ 31.750100] freed 168-byte region [ffff8880163a1488, ffff8880163a1530) [ 31.751487] [ 31.751702] The buggy address belongs to the physical page: [ 31.752353] page:00000000ab6efd27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163a1 [ 31.753467] memcg:ffff88800f706101 [ 31.753906] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.754555] page_type: 0xffffffff() [ 31.754999] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.755912] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f706101 [ 31.756835] page dumped because: kasan: bad access detected [ 31.757488] [ 31.757701] Memory state around the buggy address: [ 31.758292] ffff8880163a1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.759136] ffff8880163a1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.759990] >ffff8880163a1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.760836] ^ [ 31.761578] ffff8880163a1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.762434] ffff8880163a1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.763275] ================================================================== [ 31.764240] Disabling lock debugging due to kernel taint [ 33.782532] BUG: Bad rss-counter state mm:000000005b2913eb type:MM_FILEPAGES val:33 [ 33.783538] BUG: Bad rss-counter state mm:000000005b2913eb type:MM_ANONPAGES val:22 [ 34.277071] BUG: Bad rss-counter state mm:0000000096dbddd3 type:MM_FILEPAGES val:33 [ 34.278075] BUG: Bad rss-counter state mm:0000000096dbddd3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54726' (ECDSA) to the list of known hosts. 2023/06/20 22:47:14 fuzzer started 2023/06/20 22:47:14 dialing manager at localhost:36067 2023/06/20 22:47:14 checking machine... 2023/06/20 22:47:14 checking revisions... [ 34.984448] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:47:14 testing simple program... [ 35.036250] cgroup: Unknown subsys name 'net' [ 35.088029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:47:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe54748e88 CR3=0000000019dc4000 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=2034313a37343a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a37343a3232203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880103073f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000093c0000093c R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f186 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 00007fbef21db900 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=00007fbef2792618 CR3=000000000d968000 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