syzkaller login: [ 30.642984] BUG: Bad rss-counter state mm:0000000027f64409 type:MM_FILEPAGES val:33 [ 30.644156] BUG: Bad rss-counter state mm:0000000027f64409 type:MM_ANONPAGES val:22 [ 30.812425] ================================================================== [ 30.813327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.814306] Read of size 8 at addr ffff888015c3e058 by task sshd/221 [ 30.815086] [ 30.815303] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.816269] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.817278] Call Trace: [ 30.817618] [ 30.817911] dump_stack_lvl+0x91/0xf0 [ 30.818415] print_report+0xcc/0x620 [ 30.818905] ? __virt_addr_valid+0x102/0x340 [ 30.819460] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820089] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820705] kasan_report+0xbe/0xf0 [ 30.821194] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821825] vma_interval_tree_remove+0xc75/0xec0 [ 30.822439] vma_prepare+0xc54/0x11a0 [ 30.822927] __split_vma+0x5af/0x950 [ 30.823405] ? __pfx___split_vma+0x10/0x10 [ 30.823931] ? find_held_lock+0x2c/0x110 [ 30.824450] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.825027] ? lock_is_held_type+0x9f/0x120 [ 30.825565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.826194] ? mtree_range_walk+0x632/0x900 [ 30.826740] ? mas_walk+0x5c7/0x7c0 [ 30.827225] do_vmi_munmap+0x1f1/0x2b0 [ 30.827723] mmap_region+0x1f9/0x2660 [ 30.828205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.828717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829431] ? __pfx_lock_acquire+0x10/0x10 [ 30.829965] ? __pfx_mmap_region+0x10/0x10 [ 30.830501] ? security_mmap_addr+0x7d/0xa0 [ 30.831036] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831590] do_mmap+0x854/0xf00 [ 30.832032] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.833097] ksys_mmap_pgoff+0x3af/0x500 [ 30.833606] do_syscall_64+0x3f/0x90 [ 30.834091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834735] RIP: 0033:0x7f9ed3d90d82 [ 30.835194] 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 [ 30.837313] RSP: 002b:00007ffd00f0ac08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.838225] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ed3d90d82 [ 30.839086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ed31ca000 [ 30.839923] RBP: 00007f9ed31ca000 R08: 0000000000000009 R09: 0000000000001000 [ 30.840768] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b89aae8ec0 [ 30.841605] R13: 00007ffd00f0ac20 R14: 00007ffd00f0ac50 R15: 00007ffd00f0afb0 [ 30.842463] [ 30.842757] [ 30.842976] Allocated by task 214: [ 30.843398] kasan_save_stack+0x22/0x50 [ 30.843904] kasan_set_track+0x25/0x30 [ 30.844402] __kasan_slab_alloc+0x59/0x70 [ 30.844930] kmem_cache_alloc+0x16b/0x370 [ 30.845456] vm_area_dup+0x20/0x160 [ 30.845910] __split_vma+0x170/0x950 [ 30.846397] split_vma+0xc6/0x110 [ 30.846832] mprotect_fixup+0x8d2/0xb30 [ 30.847332] do_mprotect_pkey+0x87e/0xd40 [ 30.847849] __x64_sys_mprotect+0x78/0xc0 [ 30.848369] do_syscall_64+0x3f/0x90 [ 30.848849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849499] [ 30.849720] Freed by task 214: [ 30.850136] kasan_save_stack+0x22/0x50 [ 30.850641] kasan_set_track+0x25/0x30 [ 30.851144] kasan_save_free_info+0x2b/0x50 [ 30.851679] __kasan_slab_free+0x10a/0x190 [ 30.852218] kmem_cache_free+0x10d/0x4d0 [ 30.852738] rcu_core+0x8c8/0x2860 [ 30.853186] __do_softirq+0x1b7/0x7d4 [ 30.853666] [ 30.853887] Last potentially related work creation: [ 30.854493] kasan_save_stack+0x22/0x50 [ 30.854995] __kasan_record_aux_stack+0x8e/0xa0 [ 30.855574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.856215] remove_vma+0x139/0x170 [ 30.856666] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.857233] do_vmi_munmap+0x1f1/0x2b0 [ 30.857720] __vm_munmap+0x138/0x3a0 [ 30.858209] __x64_sys_munmap+0x59/0x80 [ 30.858712] do_syscall_64+0x3f/0x90 [ 30.859207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859859] [ 30.860080] The buggy address belongs to the object at ffff888015c3e000 [ 30.860080] which belongs to the cache vm_area_struct of size 168 [ 30.861563] The buggy address is located 88 bytes inside of [ 30.861563] freed 168-byte region [ffff888015c3e000, ffff888015c3e0a8) [ 30.862990] [ 30.863202] The buggy address belongs to the physical page: [ 30.863856] page:0000000076771fe1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c3e [ 30.864968] memcg:ffff888016f31401 [ 30.865399] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.866054] page_type: 0xffffffff() [ 30.866531] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.867469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f31401 [ 30.868377] page dumped because: kasan: bad access detected [ 30.869039] [ 30.869258] Memory state around the buggy address: [ 30.869840] ffff888015c3df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.870725] ffff888015c3df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.871591] >ffff888015c3e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.872454] ^ [ 30.873177] ffff888015c3e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.874037] ffff888015c3e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.874901] ================================================================== [ 30.875966] Disabling lock debugging due to kernel taint [ 32.853296] BUG: Bad rss-counter state mm:000000006e4eae99 type:MM_FILEPAGES val:33 [ 32.854597] BUG: Bad rss-counter state mm:000000006e4eae99 type:MM_ANONPAGES val:22 [ 33.335943] BUG: Bad rss-counter state mm:00000000728c9656 type:MM_FILEPAGES val:33 [ 33.337101] BUG: Bad rss-counter state mm:00000000728c9656 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54115' (ECDSA) to the list of known hosts. 2023/06/21 01:33:23 fuzzer started 2023/06/21 01:33:24 dialing manager at localhost:36067 2023/06/21 01:33:24 checking machine... 2023/06/21 01:33:24 checking revisions... [ 33.955929] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:33:24 testing simple program... [ 34.000069] cgroup: Unknown subsys name 'net' [ 34.053736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:23 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff88800ef11b40 RSI=ffffffff83c60bc0 RDI=ffffffff87f97830 RBP=0000000000000000 RSP=ffff888015d9f6a0 R8 =0000000000000005 R9 =00000000000000ff R10=000000000000005e R11=0000096700000967 R12=0000000000000000 R13=000000000000005e R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0871 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe8889bf900 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=00007fe888f76618 CR3=000000000ea54000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe888f770b0 CR3=0000000015b3c000 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=2033323a33333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a33333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000