syzkaller login: [ 31.389887] sshd (214) used greatest stack depth: 24128 bytes left [ 31.391719] BUG: Bad rss-counter state mm:00000000af0cf398 type:MM_FILEPAGES val:33 [ 31.392743] BUG: Bad rss-counter state mm:00000000af0cf398 type:MM_ANONPAGES val:22 [ 31.555090] ================================================================== [ 31.555988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.556920] Read of size 8 at addr ffff88800c6d8d08 by task sshd/221 [ 31.557678] [ 31.557895] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.558959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.559928] Call Trace: [ 31.560243] [ 31.560549] dump_stack_lvl+0x91/0xf0 [ 31.561037] print_report+0xcc/0x620 [ 31.561518] ? __virt_addr_valid+0x102/0x340 [ 31.562059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.562678] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.563290] kasan_report+0xbe/0xf0 [ 31.563762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.564378] vma_interval_tree_remove+0xc75/0xec0 [ 31.564970] vma_prepare+0xc54/0x11a0 [ 31.565449] __split_vma+0x5af/0x950 [ 31.565914] ? __pfx___split_vma+0x10/0x10 [ 31.566446] ? find_held_lock+0x2c/0x110 [ 31.566958] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.567519] ? lock_is_held_type+0x9f/0x120 [ 31.568050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.568647] ? mtree_range_walk+0x632/0x900 [ 31.569193] ? mas_walk+0x5c7/0x7c0 [ 31.569673] do_vmi_munmap+0x1f1/0x2b0 [ 31.570161] mmap_region+0x1f9/0x2660 [ 31.570658] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.571167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.571877] ? __pfx_lock_acquire+0x10/0x10 [ 31.572409] ? __pfx_mmap_region+0x10/0x10 [ 31.572936] ? security_mmap_addr+0x7d/0xa0 [ 31.573465] ? get_unmapped_area+0x1f5/0x3f0 [ 31.574010] do_mmap+0x854/0xf00 [ 31.574451] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.574940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.575496] ksys_mmap_pgoff+0x3af/0x500 [ 31.575994] do_syscall_64+0x3f/0x90 [ 31.576466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.577114] RIP: 0033:0x7f00025e6d82 [ 31.577569] 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 [ 31.579696] RSP: 002b:00007ffe28a89c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.580605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00025e6d82 [ 31.581447] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0001a20000 [ 31.582283] RBP: 00007f0001a20000 R08: 0000000000000009 R09: 0000000000001000 [ 31.583158] R10: 0000000000000812 R11: 0000000000000206 R12: 000055614f4d6d90 [ 31.583998] R13: 00007ffe28a89c40 R14: 00007ffe28a89c70 R15: 00007ffe28a89fd0 [ 31.584849] [ 31.585137] [ 31.585353] Allocated by task 214: [ 31.585781] kasan_save_stack+0x22/0x50 [ 31.586291] kasan_set_track+0x25/0x30 [ 31.586800] __kasan_slab_alloc+0x59/0x70 [ 31.587334] kmem_cache_alloc+0x16b/0x370 [ 31.587858] vm_area_dup+0x20/0x160 [ 31.588325] __split_vma+0x170/0x950 [ 31.588800] split_vma+0xc6/0x110 [ 31.589246] mprotect_fixup+0x8d2/0xb30 [ 31.589755] do_mprotect_pkey+0x87e/0xd40 [ 31.590283] __x64_sys_mprotect+0x78/0xc0 [ 31.590812] do_syscall_64+0x3f/0x90 [ 31.591298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.591956] [ 31.592175] Freed by task 214: [ 31.592570] kasan_save_stack+0x22/0x50 [ 31.593081] kasan_set_track+0x25/0x30 [ 31.593586] kasan_save_free_info+0x2b/0x50 [ 31.594127] __kasan_slab_free+0x10a/0x190 [ 31.594699] kmem_cache_free+0x10d/0x4d0 [ 31.595211] rcu_core+0x8c8/0x2860 [ 31.595666] __do_softirq+0x1b7/0x7d4 [ 31.596151] [ 31.596369] Last potentially related work creation: [ 31.596970] kasan_save_stack+0x22/0x50 [ 31.597490] __kasan_record_aux_stack+0x8e/0xa0 [ 31.598071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.598729] remove_vma+0x139/0x170 [ 31.599190] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.599758] do_vmi_munmap+0x1f1/0x2b0 [ 31.600248] __vm_munmap+0x138/0x3a0 [ 31.600725] __x64_sys_munmap+0x59/0x80 [ 31.601229] do_syscall_64+0x3f/0x90 [ 31.601708] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.602374] [ 31.602590] The buggy address belongs to the object at ffff88800c6d8cb0 [ 31.602590] which belongs to the cache vm_area_struct of size 168 [ 31.604081] The buggy address is located 88 bytes inside of [ 31.604081] freed 168-byte region [ffff88800c6d8cb0, ffff88800c6d8d58) [ 31.605506] [ 31.605725] The buggy address belongs to the physical page: [ 31.606388] page:000000001baab4af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6d8 [ 31.607475] memcg:ffff88800d764701 [ 31.607899] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.608542] page_type: 0xffffffff() [ 31.608997] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.609903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d764701 [ 31.610829] page dumped because: kasan: bad access detected [ 31.611492] [ 31.611713] Memory state around the buggy address: [ 31.612296] ffff88800c6d8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.613147] ffff88800c6d8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.614010] >ffff88800c6d8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.614875] ^ [ 31.615320] ffff88800c6d8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.616175] ffff88800c6d8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.617033] ================================================================== [ 31.618171] Disabling lock debugging due to kernel taint [ 33.573556] BUG: Bad rss-counter state mm:000000002590c3b6 type:MM_FILEPAGES val:33 [ 33.574542] BUG: Bad rss-counter state mm:000000002590c3b6 type:MM_ANONPAGES val:22 [ 34.068566] BUG: Bad rss-counter state mm:0000000040e0d2f2 type:MM_FILEPAGES val:33 [ 34.069783] BUG: Bad rss-counter state mm:0000000040e0d2f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1970' (ECDSA) to the list of known hosts. 2023/06/21 09:55:15 fuzzer started 2023/06/21 09:55:15 dialing manager at localhost:36067 2023/06/21 09:55:15 checking machine... 2023/06/21 09:55:15 checking revisions... [ 34.808217] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:55:15 testing simple program... [ 34.862814] cgroup: Unknown subsys name 'net' [ 34.905459] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:55:14 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88800d6af6c0 RDX=1ffff11001ad5ecf RSI=ffffffff813ad720 RDI=ffff88800d6af6e8 RBP=ffff88800d6af6b8 RSP=ffff88800d6af618 R8 =0000000000000001 R9 =ffff88800d6af660 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800d6af6e8 R13=0000000000000000 R14=ffff88800fed9b40 R15=ffff88801a0f9000 RIP=ffffffff813ad474 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8463b56900 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=00007f8462f84e40 CR3=0000000009a86000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=90130d2e92e5f7d000000000000ae988 XMM05=4bca7d2e39b4fa7c0000000000133340 XMM06=c291bd5c70af25b90000000000132130 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fd6464afb7a RCX=000000000000001a RDX=0000000000000006 RSI=00007fd6464afb7a RDI=00007ffea83619a0 RBP=00007ffea8361980 RSP=00007ffea83613f8 R8 =00000000ffffffff R9 =00000000000000b9 R10=000055bbdeb193d0 R11=0000000000000000 R12=00007ffea83619a0 R13=00007fd6464afb58 R14=00007ffea8361b20 R15=00007fd645f131a0 RIP=00007fd645dd5b3c RFL=00000246 [---Z-P-] 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 00007fd64595f900 00000000 00000000 GS =0000 0000000000000000 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=00007fd645f16618 CR3=000000000ee3c000 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=25252525252525252525252525252525 XMM01=000000ff0000000000000000000000ff XMM02=00000000000000000000000000000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=722073253d6c616e696d726574207325 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000