syzkaller login: [ 33.685152] BUG: Bad rss-counter state mm:0000000002f48388 type:MM_FILEPAGES val:33 [ 33.686325] BUG: Bad rss-counter state mm:0000000002f48388 type:MM_ANONPAGES val:22 [ 33.846636] ================================================================== [ 33.847575] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.848501] Read of size 8 at addr ffff88800e2e95c8 by task sshd/219 [ 33.849438] [ 33.849659] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.850516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.851496] Call Trace: [ 33.851815] [ 33.852100] dump_stack_lvl+0x91/0xf0 [ 33.852584] print_report+0xcc/0x620 [ 33.853068] ? __virt_addr_valid+0x102/0x340 [ 33.853615] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.854255] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.854859] kasan_report+0xbe/0xf0 [ 33.855331] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.855946] vma_interval_tree_remove+0xc75/0xec0 [ 33.856539] vma_prepare+0xc54/0x11a0 [ 33.857016] __split_vma+0x5af/0x950 [ 33.857492] ? __pfx___split_vma+0x10/0x10 [ 33.858026] ? find_held_lock+0x2c/0x110 [ 33.858549] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.859116] ? lock_is_held_type+0x9f/0x120 [ 33.859645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.860248] ? mtree_range_walk+0x632/0x900 [ 33.860789] ? mas_walk+0x5c7/0x7c0 [ 33.861263] do_vmi_munmap+0x1f1/0x2b0 [ 33.861752] mmap_region+0x1f9/0x2660 [ 33.862237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.862746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.863453] ? __pfx_lock_acquire+0x10/0x10 [ 33.863976] ? __pfx_mmap_region+0x10/0x10 [ 33.864502] ? security_mmap_addr+0x7d/0xa0 [ 33.865021] ? get_unmapped_area+0x1f5/0x3f0 [ 33.865562] do_mmap+0x854/0xf00 [ 33.866014] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.866505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.867061] ksys_mmap_pgoff+0x3af/0x500 [ 33.867559] do_syscall_64+0x3f/0x90 [ 33.868031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.868666] RIP: 0033:0x7f87207a9d82 [ 33.869117] 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 [ 33.871215] RSP: 002b:00007fff9bba60f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.872114] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87207a9d82 [ 33.872950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f871fbe3000 [ 33.873795] RBP: 00007f871fbe3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.874657] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650f4279f60 [ 33.875489] R13: 00007fff9bba6110 R14: 00007fff9bba6140 R15: 00007fff9bba64a0 [ 33.876339] [ 33.876627] [ 33.876838] Allocated by task 212: [ 33.877270] kasan_save_stack+0x22/0x50 [ 33.877778] kasan_set_track+0x25/0x30 [ 33.878285] __kasan_slab_alloc+0x59/0x70 [ 33.878804] kmem_cache_alloc+0x16b/0x370 [ 33.879322] vm_area_dup+0x20/0x160 [ 33.879774] __split_vma+0x170/0x950 [ 33.880235] split_vma+0xc6/0x110 [ 33.880666] mprotect_fixup+0x8d2/0xb30 [ 33.881171] do_mprotect_pkey+0x87e/0xd40 [ 33.881699] __x64_sys_mprotect+0x78/0xc0 [ 33.882233] do_syscall_64+0x3f/0x90 [ 33.882702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.883350] [ 33.883566] Freed by task 212: [ 33.883960] kasan_save_stack+0x22/0x50 [ 33.884461] kasan_set_track+0x25/0x30 [ 33.884952] kasan_save_free_info+0x2b/0x50 [ 33.885473] __kasan_slab_free+0x10a/0x190 [ 33.886020] kmem_cache_free+0x10d/0x4d0 [ 33.886532] rcu_core+0x8c8/0x2860 [ 33.886977] __do_softirq+0x1b7/0x7d4 [ 33.887452] [ 33.887664] Last potentially related work creation: [ 33.888240] kasan_save_stack+0x22/0x50 [ 33.888742] __kasan_record_aux_stack+0x8e/0xa0 [ 33.889312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.889961] remove_vma+0x139/0x170 [ 33.890403] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.890950] do_vmi_munmap+0x1f1/0x2b0 [ 33.891427] __vm_munmap+0x138/0x3a0 [ 33.891886] __x64_sys_munmap+0x59/0x80 [ 33.892372] do_syscall_64+0x3f/0x90 [ 33.892839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.893468] [ 33.893685] The buggy address belongs to the object at ffff88800e2e9570 [ 33.893685] which belongs to the cache vm_area_struct of size 168 [ 33.895141] The buggy address is located 88 bytes inside of [ 33.895141] freed 168-byte region [ffff88800e2e9570, ffff88800e2e9618) [ 33.896539] [ 33.896751] The buggy address belongs to the physical page: [ 33.897400] page:00000000a45b6010 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2e9 [ 33.898479] memcg:ffff88800ef88201 [ 33.898900] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.899589] page_type: 0xffffffff() [ 33.900040] raw: 0100000000000200 ffff88800879fc80 ffffea000037bc00 dead000000000007 [ 33.900951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef88201 [ 33.901845] page dumped because: kasan: bad access detected [ 33.902502] [ 33.902714] Memory state around the buggy address: [ 33.903292] ffff88800e2e9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.904129] ffff88800e2e9500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.904973] >ffff88800e2e9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.905808] ^ [ 33.906481] ffff88800e2e9600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 33.907322] ffff88800e2e9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.908167] ================================================================== [ 33.909319] Disabling lock debugging due to kernel taint [ 35.605581] BUG: Bad rss-counter state mm:000000002e7c51d9 type:MM_FILEPAGES val:33 [ 35.606231] BUG: Bad rss-counter state mm:000000002e7c51d9 type:MM_ANONPAGES val:22 [ 36.059158] BUG: Bad rss-counter state mm:000000003e7d41b4 type:MM_FILEPAGES val:33 [ 36.060138] BUG: Bad rss-counter state mm:000000003e7d41b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39129' (ECDSA) to the list of known hosts. 2023/06/19 14:35:51 fuzzer started 2023/06/19 14:35:51 dialing manager at localhost:44161 2023/06/19 14:35:51 checking machine... 2023/06/19 14:35:51 checking revisions... [ 36.791002] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:35:51 testing simple program... [ 36.839434] cgroup: Unknown subsys name 'net' [ 36.876272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:35:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff8450c50e RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806ce35000 RBP=ffff88806ce35000 RSP=ffffffff85407dd8 R8 =0000000000000001 R9 =ffff88806ce35003 R10=ffff88806ce35003 R11=ffff888008c58000 R12=0000000000000000 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ef09 RFL=00000012 [----A--] 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 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=00007ffe1e2f1988 CR3=0000000005482000 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=00007f1671f72510000055808005c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015f4d000 RCX=1ffffffff09acbcd RDX=ffffffff87f981d0 RSI=0000000000000000 RDI=ffffffff84d65e68 RBP=ffff888015f4d608 RSP=ffff88801c93fd88 R8 =0000000000000003 R9 =0000000000000000 R10=ffff888015f4d653 R11=00000000000b6996 R12=0000000000000009 R13=0000000000000009 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff83863b6c 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 00007efc9bfb8900 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=00007efc9c5700b0 CR3=000000000fc36000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000