syzkaller login: [ 38.683577] BUG: Bad rss-counter state mm:00000000cb258d39 type:MM_FILEPAGES val:33 [ 38.684985] BUG: Bad rss-counter state mm:00000000cb258d39 type:MM_ANONPAGES val:22 [ 38.804897] ================================================================== [ 38.805990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.807110] Read of size 8 at addr ffff88800ea67a50 by task sshd/219 [ 38.808008] [ 38.808318] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.809378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.810563] Call Trace: [ 38.810980] [ 38.811310] dump_stack_lvl+0x91/0xf0 [ 38.811713] print_report+0xcc/0x620 [ 38.812111] ? __virt_addr_valid+0x102/0x340 [ 38.812556] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.813061] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.813565] kasan_report+0xbe/0xf0 [ 38.813967] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.814479] vma_interval_tree_remove+0xc75/0xec0 [ 38.814982] vma_prepare+0xc54/0x11a0 [ 38.815375] __split_vma+0x5af/0x950 [ 38.815757] ? __pfx___split_vma+0x10/0x10 [ 38.816181] ? find_held_lock+0x2c/0x110 [ 38.816611] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.817079] ? lock_is_held_type+0x9f/0x120 [ 38.817515] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.818029] ? mtree_range_walk+0x632/0x900 [ 38.818489] ? mas_walk+0x5c7/0x7c0 [ 38.818891] do_vmi_munmap+0x1f1/0x2b0 [ 38.819289] mmap_region+0x1f9/0x2660 [ 38.819679] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.820087] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.820673] ? __pfx_lock_acquire+0x10/0x10 [ 38.821100] ? __pfx_mmap_region+0x10/0x10 [ 38.821530] ? security_mmap_addr+0x7d/0xa0 [ 38.821981] ? get_unmapped_area+0x1f5/0x3f0 [ 38.822426] do_mmap+0x854/0xf00 [ 38.822796] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.823194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.823643] ksys_mmap_pgoff+0x3af/0x500 [ 38.824047] do_syscall_64+0x3f/0x90 [ 38.824430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.824948] RIP: 0033:0x7f6a059b1d82 [ 38.825316] 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 [ 38.827063] RSP: 002b:00007fff0fa5f058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.827804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a059b1d82 [ 38.828488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a04deb000 [ 38.829175] RBP: 00007f6a04deb000 R08: 0000000000000009 R09: 0000000000001000 [ 38.829876] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfff440ec0 [ 38.830563] R13: 00007fff0fa5f070 R14: 00007fff0fa5f0a0 R15: 00007fff0fa5f400 [ 38.831258] [ 38.831494] [ 38.831665] Allocated by task 212: [ 38.832011] kasan_save_stack+0x22/0x50 [ 38.832420] kasan_set_track+0x25/0x30 [ 38.832813] __kasan_slab_alloc+0x59/0x70 [ 38.833226] kmem_cache_alloc+0x16b/0x370 [ 38.833634] vm_area_dup+0x20/0x160 [ 38.834022] __split_vma+0x170/0x950 [ 38.834394] split_vma+0xc6/0x110 [ 38.834761] mprotect_fixup+0x8d2/0xb30 [ 38.835161] do_mprotect_pkey+0x87e/0xd40 [ 38.835584] __x64_sys_mprotect+0x78/0xc0 [ 38.835996] do_syscall_64+0x3f/0x90 [ 38.836371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.836880] [ 38.837048] Freed by task 212: [ 38.837363] kasan_save_stack+0x22/0x50 [ 38.837763] kasan_set_track+0x25/0x30 [ 38.838182] kasan_save_free_info+0x2b/0x50 [ 38.838606] __kasan_slab_free+0x10a/0x190 [ 38.839029] kmem_cache_free+0x10d/0x4d0 [ 38.839430] rcu_core+0x8c8/0x2860 [ 38.839787] __do_softirq+0x1b7/0x7d4 [ 38.840177] [ 38.840347] Last potentially related work creation: [ 38.840821] kasan_save_stack+0x22/0x50 [ 38.841217] __kasan_record_aux_stack+0x8e/0xa0 [ 38.841674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.842211] remove_vma+0x139/0x170 [ 38.842582] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.843043] do_vmi_munmap+0x1f1/0x2b0 [ 38.843424] __vm_munmap+0x138/0x3a0 [ 38.843795] __x64_sys_munmap+0x59/0x80 [ 38.844193] do_syscall_64+0x3f/0x90 [ 38.844573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.845094] [ 38.845265] The buggy address belongs to the object at ffff88800ea679f8 [ 38.845265] which belongs to the cache vm_area_struct of size 168 [ 38.846452] The buggy address is located 88 bytes inside of [ 38.846452] freed 168-byte region [ffff88800ea679f8, ffff88800ea67aa0) [ 38.847627] [ 38.847808] The buggy address belongs to the physical page: [ 38.848342] page:00000000ae3acbae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea67 [ 38.849216] memcg:ffff88800e2f2601 [ 38.849560] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.850156] page_type: 0xffffffff() [ 38.850523] raw: 0100000000000200 ffff8880087a0c80 ffffea000039fa00 dead000000000006 [ 38.851315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2f2601 [ 38.852055] page dumped because: kasan: bad access detected [ 38.852593] [ 38.852766] Memory state around the buggy address: [ 38.853249] ffff88800ea67900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.853952] ffff88800ea67980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.854643] >ffff88800ea67a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.855378] ^ [ 38.855941] ffff88800ea67a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 38.856624] ffff88800ea67b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.857301] ================================================================== [ 38.858101] Disabling lock debugging due to kernel taint [ 41.233506] BUG: Bad rss-counter state mm:00000000702071ea type:MM_FILEPAGES val:33 [ 41.234704] BUG: Bad rss-counter state mm:00000000702071ea type:MM_ANONPAGES val:22 [ 41.621597] BUG: Bad rss-counter state mm:00000000dfaa9555 type:MM_FILEPAGES val:33 [ 41.622785] BUG: Bad rss-counter state mm:00000000dfaa9555 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39181' (ECDSA) to the list of known hosts. 2023/06/21 03:20:04 fuzzer started 2023/06/21 03:20:04 dialing manager at localhost:36067 2023/06/21 03:20:04 checking machine... 2023/06/21 03:20:04 checking revisions... [ 42.353954] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:20:04 testing simple program... [ 42.405197] cgroup: Unknown subsys name 'net' [ 42.466024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:20:03 Registers: info registers vcpu 0 RAX=1ffff110018feec7 RBX=0000000000000010 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000012 RDI=ffff88800c7f7638 RBP=dffffc0000000000 RSP=ffff88800c7f7528 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=0000000000000012 R13=0000000000000000 R14=ffff88800c7f75b8 R15=0000000000000000 RIP=ffffffff813ad61a RFL=00000246 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa7a0ba5900 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=00007fa7a00065c0 CR3=000000000c51a000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=40760d214d4de41300000000000ae988 XMM05=9c2ce6fa361b77d40000000000132f10 XMM06=4fda316b135da52b0000000000131fb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007f790eb946a0 RBX=000055b76da16b20 RCX=000000000000002f RDX=00007f790eb984a0 RSI=00007f790e5c0b22 RDI=000055b76da16b20 RBP=0000000000000018 RSP=00007ffcca2ba088 R8 =000055b76da42f1f R9 =00007f790eb97be0 R10=0000000000000100 R11=0000000000000246 R12=000055b76da33f80 R13=00007ffcca2ba098 R14=00007f790e5c0b22 R15=00007f790e5e5710 RIP=00007f790eb354c3 RFL=00000283 [--S---C] 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 00007f790e5e5900 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=00007ffcca2b4000 CR3=000000000e57c000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=00000000000000000000000000000000 XMM03=6c2f7261762f09454c49465f504d5446 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000ffffffffffffffffffffffffffff XMM08=6c2f7261762f09454c49465f504d5446 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000