syzkaller login: [ 49.385771] BUG: Bad rss-counter state mm:000000007dbbfe9c type:MM_FILEPAGES val:33 [ 49.387478] BUG: Bad rss-counter state mm:000000007dbbfe9c type:MM_ANONPAGES val:22 [ 49.547037] ================================================================== [ 49.548353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.549832] Read of size 8 at addr ffff888012d78968 by task sshd/220 [ 49.550931] [ 49.551191] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.552271] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.553473] Call Trace: [ 49.553864] [ 49.554210] dump_stack_lvl+0x91/0xf0 [ 49.554798] print_report+0xcc/0x620 [ 49.555377] ? __virt_addr_valid+0x102/0x340 [ 49.556053] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.556838] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.557594] kasan_report+0xbe/0xf0 [ 49.558178] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.558939] vma_interval_tree_remove+0xc75/0xec0 [ 49.559673] vma_prepare+0xc54/0x11a0 [ 49.560281] __split_vma+0x5af/0x950 [ 49.560863] ? __pfx___split_vma+0x10/0x10 [ 49.561507] ? find_held_lock+0x2c/0x110 [ 49.562128] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.562814] ? lock_is_held_type+0x9f/0x120 [ 49.563479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.564220] ? mtree_range_walk+0x632/0x900 [ 49.564906] ? mas_walk+0x5c7/0x7c0 [ 49.565495] do_vmi_munmap+0x1f1/0x2b0 [ 49.566089] mmap_region+0x1f9/0x2660 [ 49.566681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.567301] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.568189] ? __pfx_lock_acquire+0x10/0x10 [ 49.568843] ? __pfx_mmap_region+0x10/0x10 [ 49.569497] ? security_mmap_addr+0x7d/0xa0 [ 49.570151] ? get_unmapped_area+0x1f5/0x3f0 [ 49.570823] do_mmap+0x854/0xf00 [ 49.571353] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.571950] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.572644] ksys_mmap_pgoff+0x3af/0x500 [ 49.573276] do_syscall_64+0x3f/0x90 [ 49.573852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.574639] RIP: 0033:0x7f04bad8dd82 [ 49.575197] 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 [ 49.577842] RSP: 002b:00007ffd74cad208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.578963] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04bad8dd82 [ 49.580023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04ba1c7000 [ 49.581102] RBP: 00007f04ba1c7000 R08: 0000000000000009 R09: 0000000000001000 [ 49.582160] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581f0203ec0 [ 49.583211] R13: 00007ffd74cad220 R14: 00007ffd74cad250 R15: 00007ffd74cad5b0 [ 49.584272] [ 49.584622] [ 49.584875] Allocated by task 213: [ 49.585396] kasan_save_stack+0x22/0x50 [ 49.586009] kasan_set_track+0x25/0x30 [ 49.586609] __kasan_slab_alloc+0x59/0x70 [ 49.587248] kmem_cache_alloc+0x16b/0x370 [ 49.587884] vm_area_dup+0x20/0x160 [ 49.588457] __split_vma+0x170/0x950 [ 49.589026] split_vma+0xc6/0x110 [ 49.589555] mprotect_fixup+0x8d2/0xb30 [ 49.590160] do_mprotect_pkey+0x87e/0xd40 [ 49.590828] __x64_sys_mprotect+0x78/0xc0 [ 49.591331] do_syscall_64+0x3f/0x90 [ 49.591788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.592418] [ 49.592629] Freed by task 203: [ 49.593010] kasan_save_stack+0x22/0x50 [ 49.593506] kasan_set_track+0x25/0x30 [ 49.593990] kasan_save_free_info+0x2b/0x50 [ 49.594498] __kasan_slab_free+0x10a/0x190 [ 49.595015] kmem_cache_free+0x10d/0x4d0 [ 49.595505] rcu_core+0x8c8/0x2860 [ 49.595945] __do_softirq+0x1b7/0x7d4 [ 49.596405] [ 49.596617] Last potentially related work creation: [ 49.597185] kasan_save_stack+0x22/0x50 [ 49.597683] __kasan_record_aux_stack+0x8e/0xa0 [ 49.598245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.598884] remove_vma+0x139/0x170 [ 49.599324] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.599868] do_vmi_munmap+0x1f1/0x2b0 [ 49.600345] __vm_munmap+0x138/0x3a0 [ 49.600784] __x64_sys_munmap+0x59/0x80 [ 49.601262] do_syscall_64+0x3f/0x90 [ 49.601732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.602357] [ 49.602565] The buggy address belongs to the object at ffff888012d78910 [ 49.602565] which belongs to the cache vm_area_struct of size 168 [ 49.603987] The buggy address is located 88 bytes inside of [ 49.603987] freed 168-byte region [ffff888012d78910, ffff888012d789b8) [ 49.605373] [ 49.605586] The buggy address belongs to the physical page: [ 49.606224] page:00000000ef266f1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12d78 [ 49.607279] memcg:ffff88800cb3aa01 [ 49.607695] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.608342] page_type: 0xffffffff() [ 49.608788] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.609678] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb3aa01 [ 49.610550] page dumped because: kasan: bad access detected [ 49.611185] [ 49.611397] Memory state around the buggy address: [ 49.611968] ffff888012d78800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 49.612801] ffff888012d78880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 49.613633] >ffff888012d78900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.614457] ^ [ 49.615211] ffff888012d78980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 49.616055] ffff888012d78a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.616896] ================================================================== [ 49.617817] Disabling lock debugging due to kernel taint [ 51.473486] BUG: Bad rss-counter state mm:00000000f3c629d3 type:MM_FILEPAGES val:33 [ 51.474273] BUG: Bad rss-counter state mm:00000000f3c629d3 type:MM_ANONPAGES val:22 [ 51.942298] BUG: Bad rss-counter state mm:000000005d6a8197 type:MM_FILEPAGES val:33 [ 51.943037] BUG: Bad rss-counter state mm:000000005d6a8197 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35987' (ECDSA) to the list of known hosts. 2023/06/20 05:29:35 fuzzer started 2023/06/20 05:29:35 dialing manager at localhost:44161 2023/06/20 05:29:35 checking machine... 2023/06/20 05:29:35 checking revisions... [ 52.621862] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:29:35 testing simple program... [ 52.663805] cgroup: Unknown subsys name 'net' [ 52.731873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:17 Registers: info registers vcpu 0 RAX=00007f6df7dfdf60 RBX=00007fff53c940a0 RCX=00007fff53c93fc8 RDX=0000000000000011 RSI=000000000000002c RDI=00007f6df83e6060 RBP=00007fff53c941d0 RSP=00007fff53c93f40 R8 =0000557b8502f810 R9 =00007fff53c940d0 R10=000000000000002c R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=00007f6df83cf9de RFL=00000206 [-----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 00007f6df7844900 00000000 00000000 GS =0000 0000000000000000 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=00007f6df7dfe34c CR3=000000000eaee000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff812889a5 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e27e01 RSI=ffff888008e27e78 RDI=ffff888008e27e78 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b1a38 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b53b8 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff888008e27e80 R15=ffff88806cf09a50 RIP=ffffffff81131041 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 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=00007f0563113400 CR3=000000000c72e000 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=8ca363141ba937a1e348fe467a0ba2ae XMM02=000000000011d7a8ec2efd57dc4c00df XMM03=0000000000124c6816da82e35e2ec741 XMM04=836725e2dce2028c00000000000ae988 XMM05=c95e364b7038f4230000000000134a78 XMM06=4fda316b135da52b0000000000134700 XMM07=e042d86d42eb936e0000000000124ee8 XMM08=16da82e35e2ec741000000000011d808 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000