syzkaller login: [ 31.490411] BUG: Bad rss-counter state mm:0000000023fca80d type:MM_FILEPAGES val:33 [ 31.491015] BUG: Bad rss-counter state mm:0000000023fca80d type:MM_ANONPAGES val:22 [ 31.657815] ================================================================== [ 31.658926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.660146] Read of size 8 at addr ffff8880180235c8 by task sshd/219 [ 31.661011] [ 31.661231] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.662097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.663135] Call Trace: [ 31.663456] [ 31.663736] dump_stack_lvl+0x91/0xf0 [ 31.664228] print_report+0xcc/0x620 [ 31.664705] ? __virt_addr_valid+0x102/0x340 [ 31.665253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.665860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.666472] kasan_report+0xbe/0xf0 [ 31.666956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.667572] vma_interval_tree_remove+0xc75/0xec0 [ 31.668165] vma_prepare+0xc54/0x11a0 [ 31.668642] __split_vma+0x5af/0x950 [ 31.669110] ? __pfx___split_vma+0x10/0x10 [ 31.669630] ? find_held_lock+0x2c/0x110 [ 31.670142] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.670727] ? lock_is_held_type+0x9f/0x120 [ 31.671267] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.671878] ? mtree_range_walk+0x632/0x900 [ 31.672434] ? mas_walk+0x5c7/0x7c0 [ 31.672911] do_vmi_munmap+0x1f1/0x2b0 [ 31.673399] mmap_region+0x1f9/0x2660 [ 31.673875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.674380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.675097] ? __pfx_lock_acquire+0x10/0x10 [ 31.675627] ? __pfx_mmap_region+0x10/0x10 [ 31.676152] ? security_mmap_addr+0x7d/0xa0 [ 31.676676] ? get_unmapped_area+0x1f5/0x3f0 [ 31.677221] do_mmap+0x854/0xf00 [ 31.677657] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.678145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.678718] ksys_mmap_pgoff+0x3af/0x500 [ 31.679219] do_syscall_64+0x3f/0x90 [ 31.679693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.680333] RIP: 0033:0x7fa3c59d2d82 [ 31.680789] 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 [ 31.682904] RSP: 002b:00007ffe7ee7f398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.683817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa3c59d2d82 [ 31.684710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3c4e0c000 [ 31.685595] RBP: 00007fa3c4e0c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.686480] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b081b1aec0 [ 31.687379] R13: 00007ffe7ee7f3b0 R14: 00007ffe7ee7f3e0 R15: 00007ffe7ee7f740 [ 31.688265] [ 31.688566] [ 31.688793] Allocated by task 212: [ 31.689244] kasan_save_stack+0x22/0x50 [ 31.689768] kasan_set_track+0x25/0x30 [ 31.690285] __kasan_slab_alloc+0x59/0x70 [ 31.690833] kmem_cache_alloc+0x16b/0x370 [ 31.691373] vm_area_dup+0x20/0x160 [ 31.691842] __split_vma+0x170/0x950 [ 31.692329] split_vma+0xc6/0x110 [ 31.692784] mprotect_fixup+0x8d2/0xb30 [ 31.693307] do_mprotect_pkey+0x87e/0xd40 [ 31.693846] __x64_sys_mprotect+0x78/0xc0 [ 31.694385] do_syscall_64+0x3f/0x90 [ 31.694896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695570] [ 31.695793] Freed by task 212: [ 31.696199] kasan_save_stack+0x22/0x50 [ 31.696725] kasan_set_track+0x25/0x30 [ 31.697234] kasan_save_free_info+0x2b/0x50 [ 31.697786] __kasan_slab_free+0x10a/0x190 [ 31.698337] kmem_cache_free+0x10d/0x4d0 [ 31.698877] rcu_core+0x8c8/0x2860 [ 31.699334] __do_softirq+0x1b7/0x7d4 [ 31.699825] [ 31.700046] Last potentially related work creation: [ 31.700654] kasan_save_stack+0x22/0x50 [ 31.701175] __kasan_record_aux_stack+0x8e/0xa0 [ 31.701770] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.702437] remove_vma+0x139/0x170 [ 31.702917] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.703497] do_vmi_munmap+0x1f1/0x2b0 [ 31.704005] __vm_munmap+0x138/0x3a0 [ 31.704490] __x64_sys_munmap+0x59/0x80 [ 31.705008] do_syscall_64+0x3f/0x90 [ 31.705501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.706163] [ 31.706386] The buggy address belongs to the object at ffff888018023570 [ 31.706386] which belongs to the cache vm_area_struct of size 168 [ 31.707930] The buggy address is located 88 bytes inside of [ 31.707930] freed 168-byte region [ffff888018023570, ffff888018023618) [ 31.709400] [ 31.709626] The buggy address belongs to the physical page: [ 31.710318] page:000000001c5da463 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18023 [ 31.711480] memcg:ffff88801801e501 [ 31.711925] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.712595] page_type: 0xffffffff() [ 31.713066] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.714025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801801e501 [ 31.714986] page dumped because: kasan: bad access detected [ 31.715676] [ 31.715897] Memory state around the buggy address: [ 31.716510] ffff888018023480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.717395] ffff888018023500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.718292] >ffff888018023580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.719196] ^ [ 31.719890] ffff888018023600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.720773] ffff888018023680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.721667] ================================================================== [ 31.722700] Disabling lock debugging due to kernel taint [ 33.878733] BUG: Bad rss-counter state mm:000000004130b391 type:MM_FILEPAGES val:33 [ 33.880131] BUG: Bad rss-counter state mm:000000004130b391 type:MM_ANONPAGES val:22 [ 34.333377] BUG: Bad rss-counter state mm:00000000671dcb8b type:MM_FILEPAGES val:33 [ 34.335035] BUG: Bad rss-counter state mm:00000000671dcb8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50154' (ECDSA) to the list of known hosts. 2023/06/21 01:40:10 fuzzer started 2023/06/21 01:40:10 dialing manager at localhost:36067 2023/06/21 01:40:10 checking machine... 2023/06/21 01:40:10 checking revisions... [ 35.030371] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:40:10 testing simple program... [ 35.079226] cgroup: Unknown subsys name 'net' [ 35.132346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:40:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f87c2a3e4a0 RCX=0000000000000c00 RDX=00007f87c2a3d8a0 RSI=0000000000000000 RDI=0000000000000000 RBP=000055760b7eaf80 RSP=00007fffc9b77d00 R8 =0000000000000000 R9 =0000000000000000 R10=00007f87c29efac0 R11=0000000000000202 R12=0000000000000000 R13=00007f87c248a6f8 R14=0000000000000400 R15=000055760b7e37b0 RIP=00007f87c2901174 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 00007f87c248a900 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=00007f87c2a420b0 CR3=0000000009618000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=00007ffd9b6a2ad8 CR3=0000000009992000 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=2039303a30343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000