syzkaller login: [ 30.582759] BUG: Bad rss-counter state mm:00000000df8de488 type:MM_FILEPAGES val:33 [ 30.583947] BUG: Bad rss-counter state mm:00000000df8de488 type:MM_ANONPAGES val:22 [ 30.620356] ================================================================== [ 30.621298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.622394] Read of size 8 at addr ffff888019ab3058 by task sshd/220 [ 30.623301] [ 30.623520] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.624389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.625416] Call Trace: [ 30.625741] [ 30.626034] dump_stack_lvl+0x91/0xf0 [ 30.626537] print_report+0xcc/0x620 [ 30.627025] ? __virt_addr_valid+0x102/0x340 [ 30.627578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.628203] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.628829] kasan_report+0xbe/0xf0 [ 30.629335] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.629961] vma_interval_tree_remove+0xc75/0xec0 [ 30.630566] vma_prepare+0xc54/0x11a0 [ 30.631064] __split_vma+0x5af/0x950 [ 30.631545] ? __pfx___split_vma+0x10/0x10 [ 30.632082] ? find_held_lock+0x2c/0x110 [ 30.632609] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.633192] ? lock_is_held_type+0x9f/0x120 [ 30.633744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.634359] ? mtree_range_walk+0x632/0x900 [ 30.634931] ? mas_walk+0x5c7/0x7c0 [ 30.635412] do_vmi_munmap+0x1f1/0x2b0 [ 30.635925] mmap_region+0x1f9/0x2660 [ 30.636408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.636928] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.637674] ? __pfx_lock_acquire+0x10/0x10 [ 30.638223] ? __pfx_mmap_region+0x10/0x10 [ 30.638769] ? security_mmap_addr+0x7d/0xa0 [ 30.639308] ? get_unmapped_area+0x1f5/0x3f0 [ 30.639870] do_mmap+0x854/0xf00 [ 30.640322] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.640829] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.641421] ksys_mmap_pgoff+0x3af/0x500 [ 30.641938] do_syscall_64+0x3f/0x90 [ 30.642430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.643105] RIP: 0033:0x7f622006ad82 [ 30.643576] 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 [ 30.645732] RSP: 002b:00007ffc8e23aee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.646652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f622006ad82 [ 30.647507] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f621f4a4000 [ 30.648372] RBP: 00007f621f4a4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.649264] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559331595ec0 [ 30.650133] R13: 00007ffc8e23af00 R14: 00007ffc8e23af30 R15: 00007ffc8e23b290 [ 30.651018] [ 30.651315] [ 30.651538] Allocated by task 213: [ 30.651979] kasan_save_stack+0x22/0x50 [ 30.652500] kasan_set_track+0x25/0x30 [ 30.653014] __kasan_slab_alloc+0x59/0x70 [ 30.653558] kmem_cache_alloc+0x16b/0x370 [ 30.654088] vm_area_dup+0x20/0x160 [ 30.654561] __split_vma+0x170/0x950 [ 30.655040] split_vma+0xc6/0x110 [ 30.655481] mprotect_fixup+0x8d2/0xb30 [ 30.655997] do_mprotect_pkey+0x87e/0xd40 [ 30.656531] __x64_sys_mprotect+0x78/0xc0 [ 30.657085] do_syscall_64+0x3f/0x90 [ 30.657579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658244] [ 30.658467] Freed by task 213: [ 30.658877] kasan_save_stack+0x22/0x50 [ 30.659377] kasan_set_track+0x25/0x30 [ 30.659879] kasan_save_free_info+0x2b/0x50 [ 30.660429] __kasan_slab_free+0x10a/0x190 [ 30.660986] kmem_cache_free+0x10d/0x4d0 [ 30.661516] rcu_core+0x8c8/0x2860 [ 30.661976] __do_softirq+0x1b7/0x7d4 [ 30.662476] [ 30.662696] Last potentially related work creation: [ 30.663287] kasan_save_stack+0x22/0x50 [ 30.663795] __kasan_record_aux_stack+0x8e/0xa0 [ 30.664389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.665059] remove_vma+0x139/0x170 [ 30.665528] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.666111] do_vmi_munmap+0x1f1/0x2b0 [ 30.666617] __vm_munmap+0x138/0x3a0 [ 30.667107] __x64_sys_munmap+0x59/0x80 [ 30.667624] do_syscall_64+0x3f/0x90 [ 30.668121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668793] [ 30.669034] The buggy address belongs to the object at ffff888019ab3000 [ 30.669034] which belongs to the cache vm_area_struct of size 168 [ 30.670565] The buggy address is located 88 bytes inside of [ 30.670565] freed 168-byte region [ffff888019ab3000, ffff888019ab30a8) [ 30.672054] [ 30.672282] The buggy address belongs to the physical page: [ 30.672974] page:00000000e268bc70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ab3 [ 30.674138] memcg:ffff8880144bb601 [ 30.674595] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.675281] page_type: 0xffffffff() [ 30.675753] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.676707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144bb601 [ 30.677675] page dumped because: kasan: bad access detected [ 30.678366] [ 30.678596] Memory state around the buggy address: [ 30.679202] ffff888019ab2f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.680105] ffff888019ab2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.681009] >ffff888019ab3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.681899] ^ [ 30.682666] ffff888019ab3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.683575] ffff888019ab3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.684480] ================================================================== [ 30.685657] Disabling lock debugging due to kernel taint [ 32.465245] BUG: Bad rss-counter state mm:0000000011dddbaf type:MM_FILEPAGES val:33 [ 32.466166] BUG: Bad rss-counter state mm:0000000011dddbaf type:MM_ANONPAGES val:22 [ 32.903742] BUG: Bad rss-counter state mm:000000000c90daee type:MM_FILEPAGES val:33 [ 32.905039] BUG: Bad rss-counter state mm:000000000c90daee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17351' (ECDSA) to the list of known hosts. 2023/06/20 21:00:24 fuzzer started 2023/06/20 21:00:25 dialing manager at localhost:36067 2023/06/20 21:00:25 checking machine... 2023/06/20 21:00:25 checking revisions... [ 33.611120] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:00:25 testing simple program... [ 33.665063] cgroup: Unknown subsys name 'net' [ 33.702000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:24 Registers: info registers vcpu 0 RAX=00000000b58f8eef RBX=ffffffff82177600 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8217776d RDI=ffff8880194ff7fc RBP=1ffff1100329fefb RSP=ffff8880194ff738 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888008fe8ea0 R13=ffff88800f259500 R14=dffffc0000000000 R15=ffff88800f259500 RIP=ffffffff8386a796 RFL=00000216 [----AP-] 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 00007f3bf3440900 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=00007ffd2b9c4000 CR3=0000000015d1a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f4108a10f60 CR3=000000000b840000 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=f273a79b6dd59aa87b46a8873dca799a XMM02=000000000011da50eff9b2d0a8fce9cb XMM03=000000000011db202c67c8bc2e329bc3 XMM04=807adbd0bb6746f600000000000ae988 XMM05=19e9129bd510f23500000000001320a0 XMM06=068cdf224086d6e80000000000130f08 XMM07=e042d86d42eb936e00000000001224a8 XMM08=43393fb6c7051cb4000000000011db20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000