syzkaller login: [ 30.578631] BUG: Bad rss-counter state mm:00000000ce94287d type:MM_FILEPAGES val:33 [ 30.579841] BUG: Bad rss-counter state mm:00000000ce94287d type:MM_ANONPAGES val:22 [ 30.735650] ================================================================== [ 30.736735] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.737754] Read of size 8 at addr ffff8880139b6b38 by task sshd/220 [ 30.738615] [ 30.738835] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.739708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.740704] Call Trace: [ 30.741025] [ 30.741313] dump_stack_lvl+0x91/0xf0 [ 30.741809] print_report+0xcc/0x620 [ 30.742296] ? __virt_addr_valid+0x102/0x340 [ 30.742852] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743471] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744085] kasan_report+0xbe/0xf0 [ 30.744566] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745199] vma_interval_tree_remove+0xc75/0xec0 [ 30.745796] vma_prepare+0xc54/0x11a0 [ 30.746270] __split_vma+0x5af/0x950 [ 30.746743] ? __pfx___split_vma+0x10/0x10 [ 30.747267] ? find_held_lock+0x2c/0x110 [ 30.747783] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.748345] ? lock_is_held_type+0x9f/0x120 [ 30.748904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.749506] ? mtree_range_walk+0x632/0x900 [ 30.750056] ? mas_walk+0x5c7/0x7c0 [ 30.750529] do_vmi_munmap+0x1f1/0x2b0 [ 30.751017] mmap_region+0x1f9/0x2660 [ 30.751495] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.752003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.752726] ? __pfx_lock_acquire+0x10/0x10 [ 30.753254] ? __pfx_mmap_region+0x10/0x10 [ 30.753777] ? security_mmap_addr+0x7d/0xa0 [ 30.754304] ? get_unmapped_area+0x1f5/0x3f0 [ 30.754854] do_mmap+0x854/0xf00 [ 30.755291] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.756346] ksys_mmap_pgoff+0x3af/0x500 [ 30.756870] do_syscall_64+0x3f/0x90 [ 30.757350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757995] RIP: 0033:0x7f8f0da38d82 [ 30.758458] 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 [ 30.760566] RSP: 002b:00007ffd832f2998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.761485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f0da38d82 [ 30.762329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f0ce72000 [ 30.763172] RBP: 00007f8f0ce72000 R08: 0000000000000009 R09: 0000000000001000 [ 30.764013] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1cdf08f60 [ 30.764863] R13: 00007ffd832f29b0 R14: 00007ffd832f29e0 R15: 00007ffd832f2d40 [ 30.765710] [ 30.766001] [ 30.766213] Allocated by task 213: [ 30.766641] kasan_save_stack+0x22/0x50 [ 30.767139] kasan_set_track+0x25/0x30 [ 30.767641] __kasan_slab_alloc+0x59/0x70 [ 30.768160] kmem_cache_alloc+0x16b/0x370 [ 30.768690] vm_area_dup+0x20/0x160 [ 30.769139] __split_vma+0x170/0x950 [ 30.769608] split_vma+0xc6/0x110 [ 30.770047] mprotect_fixup+0x8d2/0xb30 [ 30.770545] do_mprotect_pkey+0x87e/0xd40 [ 30.771062] __x64_sys_mprotect+0x78/0xc0 [ 30.771580] do_syscall_64+0x3f/0x90 [ 30.772049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772698] [ 30.772913] Freed by task 213: [ 30.773305] kasan_save_stack+0x22/0x50 [ 30.773807] kasan_set_track+0x25/0x30 [ 30.774297] kasan_save_free_info+0x2b/0x50 [ 30.774827] __kasan_slab_free+0x10a/0x190 [ 30.775355] kmem_cache_free+0x10d/0x4d0 [ 30.775861] rcu_core+0x8c8/0x2860 [ 30.776303] __do_softirq+0x1b7/0x7d4 [ 30.776783] [ 30.776997] Last potentially related work creation: [ 30.777585] kasan_save_stack+0x22/0x50 [ 30.778085] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779301] remove_vma+0x139/0x170 [ 30.779750] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780301] do_vmi_munmap+0x1f1/0x2b0 [ 30.780808] __vm_munmap+0x138/0x3a0 [ 30.781276] __x64_sys_munmap+0x59/0x80 [ 30.781766] do_syscall_64+0x3f/0x90 [ 30.782238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782873] [ 30.783088] The buggy address belongs to the object at ffff8880139b6ae0 [ 30.783088] which belongs to the cache vm_area_struct of size 168 [ 30.784560] The buggy address is located 88 bytes inside of [ 30.784560] freed 168-byte region [ffff8880139b6ae0, ffff8880139b6b88) [ 30.785977] [ 30.786192] The buggy address belongs to the physical page: [ 30.786846] page:000000004ce3698f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x139b6 [ 30.787931] memcg:ffff8880169dfd01 [ 30.788355] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789007] page_type: 0xffffffff() [ 30.789458] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.790381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169dfd01 [ 30.791281] page dumped because: kasan: bad access detected [ 30.791940] [ 30.792155] Memory state around the buggy address: [ 30.792748] ffff8880139b6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.793601] ffff8880139b6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.794452] >ffff8880139b6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.795297] ^ [ 30.795912] ffff8880139b6b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.796818] ffff8880139b6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.797713] ================================================================== [ 30.798698] Disabling lock debugging due to kernel taint [ 32.833616] BUG: Bad rss-counter state mm:00000000559faee2 type:MM_FILEPAGES val:33 [ 32.834611] BUG: Bad rss-counter state mm:00000000559faee2 type:MM_ANONPAGES val:22 [ 33.197693] BUG: Bad rss-counter state mm:00000000aa2e37ac type:MM_FILEPAGES val:33 [ 33.199132] BUG: Bad rss-counter state mm:00000000aa2e37ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62119' (ECDSA) to the list of known hosts. 2023/06/20 21:57:28 fuzzer started 2023/06/20 21:57:28 dialing manager at localhost:36067 2023/06/20 21:57:28 checking machine... 2023/06/20 21:57:28 checking revisions... [ 33.918431] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:57:28 testing simple program... [ 33.962582] cgroup: Unknown subsys name 'net' [ 33.999284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000000000012ff68 RCX=00007f37afede344 RDX=00007ffd84e976f8 RSI=00007ffd84e976f8 RDI=0000562377c96330 RBP=00007ffd84e97778 RSP=00007ffd84e976f0 R8 =00000000000000e8 R9 =000000000012ff68 R10=0000000000000002 R11=00007f37ae878818 R12=00007f37ae875f68 R13=0000562377c95290 R14=0000000000000006 R15=00007ffd84e97700 RIP=00007f37afede475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f37af35b900 00000000 00000000 GS =0000 0000000000000000 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=00007f37ae7c8f00 CR3=000000000d736000 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=0000000000109f482fccd54c36d8a3f3 XMM01=6d23b735ec5357a5b44fb7c0e30f5f58 XMM02=000000000011a1f0d59e07bde36eea69 XMM03=000000000011a318ec2efd57dc4c00df XMM04=79ac38ddcd4e72cf00000000000ae988 XMM05=164fb305b53a5e6000000000001326f0 XMM06=c291bd5c70af25b900000000001314e0 XMM07=fb795ef6d65770560000000000121780 XMM08=2c67c8bc2e329bc3000000000011a318 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363ea40 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff88800f0c7f58 RBP=ffff88800f0c7f48 RSP=ffff88800f0c7f38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800f0c7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8363ea44 RFL=00000206 [-----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 00007f21a383c900 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=00007ffe55c8a000 CR3=000000000de04000 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