syzkaller login: [ 31.565667] BUG: Bad rss-counter state mm:0000000027d11a02 type:MM_FILEPAGES val:33 [ 31.566693] BUG: Bad rss-counter state mm:0000000027d11a02 type:MM_ANONPAGES val:22 [ 31.726889] ================================================================== [ 31.727836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.728771] Read of size 8 at addr ffff888019ba6ed8 by task sshd/221 [ 31.729694] [ 31.729940] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.730787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.731769] Call Trace: [ 31.732091] [ 31.732379] dump_stack_lvl+0x91/0xf0 [ 31.732868] print_report+0xcc/0x620 [ 31.733356] ? __virt_addr_valid+0x102/0x340 [ 31.733901] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.734515] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.735133] kasan_report+0xbe/0xf0 [ 31.735623] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.736241] vma_interval_tree_remove+0xc75/0xec0 [ 31.736843] vma_prepare+0xc54/0x11a0 [ 31.737337] __split_vma+0x5af/0x950 [ 31.737851] ? __pfx___split_vma+0x10/0x10 [ 31.738440] ? find_held_lock+0x2c/0x110 [ 31.739006] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.739656] ? lock_is_held_type+0x9f/0x120 [ 31.740244] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.740921] ? mtree_range_walk+0x632/0x900 [ 31.741525] ? mas_walk+0x5c7/0x7c0 [ 31.742042] do_vmi_munmap+0x1f1/0x2b0 [ 31.742587] mmap_region+0x1f9/0x2660 [ 31.743122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.743700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.744485] ? __pfx_lock_acquire+0x10/0x10 [ 31.745062] ? __pfx_mmap_region+0x10/0x10 [ 31.745648] ? security_mmap_addr+0x7d/0xa0 [ 31.746240] ? get_unmapped_area+0x1f5/0x3f0 [ 31.746846] do_mmap+0x854/0xf00 [ 31.747332] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.747891] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.748506] ksys_mmap_pgoff+0x3af/0x500 [ 31.749066] do_syscall_64+0x3f/0x90 [ 31.749588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750309] RIP: 0033:0x7fe99f5aad82 [ 31.750818] 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 [ 31.753198] RSP: 002b:00007ffcdaea7c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.754208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe99f5aad82 [ 31.755150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe99e9e4000 [ 31.756108] RBP: 00007fe99e9e4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.757042] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e0733eec0 [ 31.757982] R13: 00007ffcdaea7c50 R14: 00007ffcdaea7c80 R15: 00007ffcdaea7fe0 [ 31.758934] [ 31.759269] [ 31.759523] Allocated by task 214: [ 31.760001] kasan_save_stack+0x22/0x50 [ 31.760559] kasan_set_track+0x25/0x30 [ 31.761095] __kasan_slab_alloc+0x59/0x70 [ 31.761667] kmem_cache_alloc+0x16b/0x370 [ 31.762241] vm_area_dup+0x20/0x160 [ 31.762742] __split_vma+0x170/0x950 [ 31.763262] split_vma+0xc6/0x110 [ 31.763770] mprotect_fixup+0x8d2/0xb30 [ 31.764316] do_mprotect_pkey+0x87e/0xd40 [ 31.764897] __x64_sys_mprotect+0x78/0xc0 [ 31.765468] do_syscall_64+0x3f/0x90 [ 31.765999] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.766712] [ 31.766955] Freed by task 214: [ 31.767404] kasan_save_stack+0x22/0x50 [ 31.767968] kasan_set_track+0x25/0x30 [ 31.768519] kasan_save_free_info+0x2b/0x50 [ 31.769108] __kasan_slab_free+0x10a/0x190 [ 31.769689] kmem_cache_free+0x10d/0x4d0 [ 31.770250] rcu_core+0x8c8/0x2860 [ 31.770778] __do_softirq+0x1b7/0x7d4 [ 31.771303] [ 31.771559] Last potentially related work creation: [ 31.772204] kasan_save_stack+0x22/0x50 [ 31.772765] __kasan_record_aux_stack+0x8e/0xa0 [ 31.773398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.774101] remove_vma+0x139/0x170 [ 31.774593] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.775208] do_vmi_munmap+0x1f1/0x2b0 [ 31.775762] __vm_munmap+0x138/0x3a0 [ 31.776271] __x64_sys_munmap+0x59/0x80 [ 31.776816] do_syscall_64+0x3f/0x90 [ 31.777341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778043] [ 31.778281] The buggy address belongs to the object at ffff888019ba6e80 [ 31.778281] which belongs to the cache vm_area_struct of size 168 [ 31.779903] The buggy address is located 88 bytes inside of [ 31.779903] freed 168-byte region [ffff888019ba6e80, ffff888019ba6f28) [ 31.781463] [ 31.781701] The buggy address belongs to the physical page: [ 31.782433] page:00000000ae614c5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ba6 [ 31.783751] memcg:ffff88800f012901 [ 31.784300] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.785096] page_type: 0xffffffff() [ 31.785655] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.786798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f012901 [ 31.787948] page dumped because: kasan: bad access detected [ 31.788783] [ 31.789053] Memory state around the buggy address: [ 31.789772] ffff888019ba6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.790846] ffff888019ba6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.791927] >ffff888019ba6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.792989] ^ [ 31.793892] ffff888019ba6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.794960] ffff888019ba6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.796051] ================================================================== [ 31.797010] Disabling lock debugging due to kernel taint [ 33.966647] BUG: Bad rss-counter state mm:00000000e35a3c0b type:MM_FILEPAGES val:33 [ 33.967635] BUG: Bad rss-counter state mm:00000000e35a3c0b type:MM_ANONPAGES val:22 [ 34.454236] BUG: Bad rss-counter state mm:00000000ebc00ac2 type:MM_FILEPAGES val:33 [ 34.455418] BUG: Bad rss-counter state mm:00000000ebc00ac2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42687' (ECDSA) to the list of known hosts. 2023/06/21 05:14:29 fuzzer started 2023/06/21 05:14:30 dialing manager at localhost:36067 2023/06/21 05:14:30 checking machine... 2023/06/21 05:14:30 checking revisions... [ 35.208471] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:14:30 testing simple program... [ 35.256261] cgroup: Unknown subsys name 'net' [ 35.304089] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:14:29 Registers: info registers vcpu 0 RAX=ffff88800d081700 RBX=ffff8880146f7918 RCX=ffff88806c58e2b0 RDX=0000000000000000 RSI=ffffffff846000aa RDI=0000000000000000 RBP=ffff888013f7c42c RSP=ffff8880146f77c0 R8 =000000006dd4eb4b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800d081700 R13=000000000000001e R14=ffff888008dfc0ec R15=000000000000001e RIP=ffffffff814c0864 RFL=00000286 [--S--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 00007f699b20b900 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=00007f699a729000 CR3=000000000d634000 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=00000000000000000000000000000000 XMM01=6c38b6d5b13998b20e4cfa3e52f641d7 XMM02=000000000011a548d59e07bde36eea69 XMM03=000000000011a670ec2efd57dc4c00df XMM04=f47be7df866b067500000000000ae988 XMM05=3489bbc02f749cac0000000000132e90 XMM06=c291bd5c70af25b90000000000131c80 XMM07=fb795ef6d65770560000000000121f18 XMM08=2c67c8bc2e329bc3000000000011a670 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880169d0001 RBX=ffff8880169cfcc8 RCX=ffffffff86139701 RDX=ffff8880169cfcd0 RSI=0000000000000000 RDI=ffff8880169cf968 RBP=ffff8880169c8000 RSP=ffff8880169cf8e8 R8 =ffffffff86139748 R9 =ffff8880169cf998 R10=0000000000038001 R11=0000000000020f03 R12=ffff8880169cf9b8 R13=ffff8880169cf9a0 R14=ffff8880169cfcc8 R15=ffff8880169cf958 RIP=ffffffff81131cda 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 00007f66025d8900 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=00007ffca0b02000 CR3=000000000f05c000 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