syzkaller login: [ 38.809638] BUG: Bad rss-counter state mm:00000000b09f215f type:MM_FILEPAGES val:33 [ 38.811035] BUG: Bad rss-counter state mm:00000000b09f215f type:MM_ANONPAGES val:22 [ 38.964932] ================================================================== [ 38.966020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.967136] Read of size 8 at addr ffff88801a2a3058 by task sshd/218 [ 38.968113] [ 38.968329] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.969210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.970204] Call Trace: [ 38.970530] [ 38.970810] dump_stack_lvl+0x91/0xf0 [ 38.971304] print_report+0xcc/0x620 [ 38.971801] ? __virt_addr_valid+0x102/0x340 [ 38.972376] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973025] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.973657] kasan_report+0xbe/0xf0 [ 38.974129] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.974751] vma_interval_tree_remove+0xc75/0xec0 [ 38.975353] vma_prepare+0xc54/0x11a0 [ 38.975834] __split_vma+0x5af/0x950 [ 38.976312] ? __pfx___split_vma+0x10/0x10 [ 38.976865] ? find_held_lock+0x2c/0x110 [ 38.977390] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.977955] ? lock_is_held_type+0x9f/0x120 [ 38.978494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.979099] ? mtree_range_walk+0x632/0x900 [ 38.979653] ? mas_walk+0x5c7/0x7c0 [ 38.980130] do_vmi_munmap+0x1f1/0x2b0 [ 38.980620] mmap_region+0x1f9/0x2660 [ 38.981116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.981635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.982351] ? __pfx_lock_acquire+0x10/0x10 [ 38.982885] ? __pfx_mmap_region+0x10/0x10 [ 38.983415] ? security_mmap_addr+0x7d/0xa0 [ 38.983947] ? get_unmapped_area+0x1f5/0x3f0 [ 38.984499] do_mmap+0x854/0xf00 [ 38.984955] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.985455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.986024] ksys_mmap_pgoff+0x3af/0x500 [ 38.986534] do_syscall_64+0x3f/0x90 [ 38.987011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987659] RIP: 0033:0x7fd2326ded82 [ 38.988120] 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 [ 38.990252] RSP: 002b:00007ffe239266c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.991158] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2326ded82 [ 38.992001] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd231b18000 [ 38.992896] RBP: 00007fd231b18000 R08: 0000000000000009 R09: 0000000000001000 [ 38.993739] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e32f94fec0 [ 38.994593] R13: 00007ffe239266e0 R14: 00007ffe23926710 R15: 00007ffe23926a70 [ 38.995454] [ 38.995750] [ 38.995970] Allocated by task 211: [ 38.996395] kasan_save_stack+0x22/0x50 [ 38.996926] kasan_set_track+0x25/0x30 [ 38.997419] __kasan_slab_alloc+0x59/0x70 [ 38.997950] kmem_cache_alloc+0x16b/0x370 [ 38.998465] vm_area_dup+0x20/0x160 [ 38.998927] __split_vma+0x170/0x950 [ 38.999397] split_vma+0xc6/0x110 [ 38.999843] mprotect_fixup+0x8d2/0xb30 [ 39.000345] do_mprotect_pkey+0x87e/0xd40 [ 39.000872] __x64_sys_mprotect+0x78/0xc0 [ 39.001397] do_syscall_64+0x3f/0x90 [ 39.001877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002526] [ 39.002743] Freed by task 211: [ 39.003137] kasan_save_stack+0x22/0x50 [ 39.003641] kasan_set_track+0x25/0x30 [ 39.004135] kasan_save_free_info+0x2b/0x50 [ 39.004673] __kasan_slab_free+0x10a/0x190 [ 39.005245] kmem_cache_free+0x10d/0x4d0 [ 39.005764] rcu_core+0x8c8/0x2860 [ 39.006227] __do_softirq+0x1b7/0x7d4 [ 39.006722] [ 39.006943] Last potentially related work creation: [ 39.007562] kasan_save_stack+0x22/0x50 [ 39.008082] __kasan_record_aux_stack+0x8e/0xa0 [ 39.008673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.009342] remove_vma+0x139/0x170 [ 39.009802] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.010369] do_vmi_munmap+0x1f1/0x2b0 [ 39.010873] __vm_munmap+0x138/0x3a0 [ 39.011358] __x64_sys_munmap+0x59/0x80 [ 39.011878] do_syscall_64+0x3f/0x90 [ 39.012368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.013039] [ 39.013258] The buggy address belongs to the object at ffff88801a2a3000 [ 39.013258] which belongs to the cache vm_area_struct of size 168 [ 39.014791] The buggy address is located 88 bytes inside of [ 39.014791] freed 168-byte region [ffff88801a2a3000, ffff88801a2a30a8) [ 39.016217] [ 39.016435] The buggy address belongs to the physical page: [ 39.017121] page:00000000f3137843 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a3 [ 39.018231] memcg:ffff88801a283101 [ 39.018659] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.019312] page_type: 0xffffffff() [ 39.019777] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.020730] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a283101 [ 39.021661] page dumped because: kasan: bad access detected [ 39.022336] [ 39.022557] Memory state around the buggy address: [ 39.023146] ffff88801a2a2f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 39.024054] ffff88801a2a2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.024960] >ffff88801a2a3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.025825] ^ [ 39.026558] ffff88801a2a3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.027444] ffff88801a2a3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.028313] ================================================================== [ 39.029349] Disabling lock debugging due to kernel taint [ 40.846501] BUG: Bad rss-counter state mm:0000000030c378f8 type:MM_FILEPAGES val:33 [ 40.847758] BUG: Bad rss-counter state mm:0000000030c378f8 type:MM_ANONPAGES val:22 [ 41.399857] BUG: Bad rss-counter state mm:00000000e3a1db96 type:MM_FILEPAGES val:33 [ 41.401135] BUG: Bad rss-counter state mm:00000000e3a1db96 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33412' (ECDSA) to the list of known hosts. 2023/06/20 16:57:34 fuzzer started 2023/06/20 16:57:34 dialing manager at localhost:36067 2023/06/20 16:57:34 checking machine... 2023/06/20 16:57:34 checking revisions... [ 42.075736] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:57:34 testing simple program... [ 42.128667] cgroup: Unknown subsys name 'net' [ 42.177973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:33 Registers: info registers vcpu 0 RAX=1ffff11001904213 RBX=ffff88800c821068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c821098 RBP=ffff88800c5c3000 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800c7be5c0 R14=ffffffff813782f8 R15=ffff88800c7be5c0 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 00007ff0c6631900 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=00007ff0c5a2c930 CR3=000000000d75c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6a7258d15d7ebe5a00000000000ae988 XMM05=70018bb28a31589300000000001326f8 XMM06=bdf2e299e47b49d50000000000131428 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=00007f89e1510366 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f89e1510366 RSP=ffff888016f1f7f8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f89e1510000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888014759b40 R15=ffff888015f5d4c0 RIP=ffffffff811fc73d RFL=00000202 [-------] 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 00007f89e101d900 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=00007fffa35ba000 CR3=000000000dbe4000 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=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