syzkaller login: [ 31.604923] sshd (211) used greatest stack depth: 24128 bytes left [ 31.605879] BUG: Bad rss-counter state mm:00000000f8b90126 type:MM_FILEPAGES val:33 [ 31.607280] BUG: Bad rss-counter state mm:00000000f8b90126 type:MM_ANONPAGES val:22 [ 31.807469] ================================================================== [ 31.808591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.809738] Read of size 8 at addr ffff88800e9155c8 by task sshd/220 [ 31.810717] [ 31.810956] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.811856] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.812879] Call Trace: [ 31.813214] [ 31.813508] dump_stack_lvl+0x91/0xf0 [ 31.814024] print_report+0xcc/0x620 [ 31.814533] ? __virt_addr_valid+0x102/0x340 [ 31.815114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.815754] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.816398] kasan_report+0xbe/0xf0 [ 31.816872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.817491] vma_interval_tree_remove+0xc75/0xec0 [ 31.818090] vma_prepare+0xc54/0x11a0 [ 31.818569] __split_vma+0x5af/0x950 [ 31.819068] ? __pfx___split_vma+0x10/0x10 [ 31.819601] ? find_held_lock+0x2c/0x110 [ 31.820126] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.820698] ? lock_is_held_type+0x9f/0x120 [ 31.821246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.821851] ? mtree_range_walk+0x632/0x900 [ 31.822399] ? mas_walk+0x5c7/0x7c0 [ 31.822881] do_vmi_munmap+0x1f1/0x2b0 [ 31.823379] mmap_region+0x1f9/0x2660 [ 31.823865] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.824376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.825099] ? __pfx_lock_acquire+0x10/0x10 [ 31.825638] ? __pfx_mmap_region+0x10/0x10 [ 31.826161] ? security_mmap_addr+0x7d/0xa0 [ 31.826693] ? get_unmapped_area+0x1f5/0x3f0 [ 31.827273] do_mmap+0x854/0xf00 [ 31.827713] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.828208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.828771] ksys_mmap_pgoff+0x3af/0x500 [ 31.829283] do_syscall_64+0x3f/0x90 [ 31.829760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.830428] RIP: 0033:0x7fcac423ad82 [ 31.830894] 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 [ 31.833012] RSP: 002b:00007ffd26a11be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.833915] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcac423ad82 [ 31.834769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcac3674000 [ 31.835607] RBP: 00007fcac3674000 R08: 0000000000000009 R09: 0000000000001000 [ 31.836448] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce3b837ec0 [ 31.837284] R13: 00007ffd26a11c00 R14: 00007ffd26a11c30 R15: 00007ffd26a11f90 [ 31.838129] [ 31.838420] [ 31.838635] Allocated by task 211: [ 31.839091] kasan_save_stack+0x22/0x50 [ 31.839603] kasan_set_track+0x25/0x30 [ 31.840101] __kasan_slab_alloc+0x59/0x70 [ 31.840623] kmem_cache_alloc+0x16b/0x370 [ 31.841136] vm_area_dup+0x20/0x160 [ 31.841595] __split_vma+0x170/0x950 [ 31.842062] split_vma+0xc6/0x110 [ 31.842506] mprotect_fixup+0x8d2/0xb30 [ 31.843029] do_mprotect_pkey+0x87e/0xd40 [ 31.843563] __x64_sys_mprotect+0x78/0xc0 [ 31.844084] do_syscall_64+0x3f/0x90 [ 31.844582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.845232] [ 31.845448] Freed by task 211: [ 31.845861] kasan_save_stack+0x22/0x50 [ 31.846385] kasan_set_track+0x25/0x30 [ 31.846898] kasan_save_free_info+0x2b/0x50 [ 31.847440] __kasan_slab_free+0x10a/0x190 [ 31.847986] kmem_cache_free+0x10d/0x4d0 [ 31.848520] rcu_core+0x8c8/0x2860 [ 31.848970] __do_softirq+0x1b7/0x7d4 [ 31.849451] [ 31.849676] Last potentially related work creation: [ 31.850257] kasan_save_stack+0x22/0x50 [ 31.850774] __kasan_record_aux_stack+0x8e/0xa0 [ 31.851348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.851994] remove_vma+0x139/0x170 [ 31.852463] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.853039] do_vmi_munmap+0x1f1/0x2b0 [ 31.853553] __vm_munmap+0x138/0x3a0 [ 31.854047] __x64_sys_munmap+0x59/0x80 [ 31.854565] do_syscall_64+0x3f/0x90 [ 31.855062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.855729] [ 31.855949] Second to last potentially related work creation: [ 31.856661] kasan_save_stack+0x22/0x50 [ 31.857181] __kasan_record_aux_stack+0x8e/0xa0 [ 31.857779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.858444] remove_vma+0x139/0x170 [ 31.858932] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.859520] do_vmi_munmap+0x1f1/0x2b0 [ 31.860020] mmap_region+0x1f9/0x2660 [ 31.860519] do_mmap+0x854/0xf00 [ 31.860971] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.861483] ksys_mmap_pgoff+0x3af/0x500 [ 31.862002] do_syscall_64+0x3f/0x90 [ 31.862527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.863236] [ 31.863453] The buggy address belongs to the object at ffff88800e915570 [ 31.863453] which belongs to the cache vm_area_struct of size 168 [ 31.864992] The buggy address is located 88 bytes inside of [ 31.864992] freed 168-byte region [ffff88800e915570, ffff88800e915618) [ 31.866446] [ 31.866669] The buggy address belongs to the physical page: [ 31.867368] page:00000000e38421c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe915 [ 31.868504] memcg:ffff88800efbc201 [ 31.868939] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.869646] page_type: 0xffffffff() [ 31.870101] raw: 0100000000000200 ffff88800879fc80 ffffea0000355980 dead000000000003 [ 31.871078] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efbc201 [ 31.872011] page dumped because: kasan: bad access detected [ 31.872707] [ 31.872930] Memory state around the buggy address: [ 31.873530] ffff88800e915480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.874422] ffff88800e915500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.875333] >ffff88800e915580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.876207] ^ [ 31.876877] ffff88800e915600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.877743] ffff88800e915680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.878610] ================================================================== [ 31.879595] Disabling lock debugging due to kernel taint [ 33.979187] BUG: Bad rss-counter state mm:00000000ffa1b2f3 type:MM_FILEPAGES val:33 [ 33.980830] BUG: Bad rss-counter state mm:00000000ffa1b2f3 type:MM_ANONPAGES val:22 [ 34.529989] BUG: Bad rss-counter state mm:00000000f59efdff type:MM_FILEPAGES val:33 [ 34.531201] BUG: Bad rss-counter state mm:00000000f59efdff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1875' (ECDSA) to the list of known hosts. 2023/06/19 16:15:25 fuzzer started 2023/06/19 16:15:25 dialing manager at localhost:44161 2023/06/19 16:15:25 checking machine... 2023/06/19 16:15:25 checking revisions... [ 35.141002] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:15:26 testing simple program... [ 35.180884] cgroup: Unknown subsys name 'net' [ 35.227557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:22 Registers: info registers vcpu 0 RAX=ffffffff814c83d4 RBX=ffffffff856528e0 RCX=ffffffff814c8421 RDX=ffff888015c98000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016ad7a80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f35ce6af9b9 R13=0000000000000000 R14=ffff888015c98000 R15=0000000000000000 RIP=ffffffff814c8422 RFL=00000293 [--S-A-C] 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 00007f35ce1c3900 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=00007f35ce17701c CR3=000000000e614000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007f17ee83ed80 CR3=000000000f66c000 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=00000000000000000000000000000000 XMM01=ba5beed7e5e8eb8e0542acff15d9f315 XMM02=0000000000122258eff9b2d0a8fce9cb XMM03=00000000001223282c67c8bc2e329bc3 XMM04=744d55bd797a868900000000000ae988 XMM05=28baafa6b9a32bf10000000000137620 XMM06=27596bc203cd7a2c00000000001363c0 XMM07=fb795ef6d65770560000000000124c08 XMM08=2c67c8bc2e329bc300000000001222c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000