syzkaller login: [ 33.674644] BUG: Bad rss-counter state mm:0000000090597409 type:MM_FILEPAGES val:33 [ 33.675814] BUG: Bad rss-counter state mm:0000000090597409 type:MM_ANONPAGES val:22 [ 33.832817] ================================================================== [ 33.833912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.835013] Read of size 8 at addr ffff88800ef7f310 by task sshd/219 [ 33.835998] [ 33.836259] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.837206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.838234] Call Trace: [ 33.838571] [ 33.838855] dump_stack_lvl+0x91/0xf0 [ 33.839344] print_report+0xcc/0x620 [ 33.839832] ? __virt_addr_valid+0x102/0x340 [ 33.840396] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.841014] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.841649] kasan_report+0xbe/0xf0 [ 33.842125] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.842748] vma_interval_tree_remove+0xc75/0xec0 [ 33.843348] vma_prepare+0xc54/0x11a0 [ 33.843829] __split_vma+0x5af/0x950 [ 33.844306] ? __pfx___split_vma+0x10/0x10 [ 33.844831] ? find_held_lock+0x2c/0x110 [ 33.845382] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.845950] ? lock_is_held_type+0x9f/0x120 [ 33.846491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.847094] ? mtree_range_walk+0x632/0x900 [ 33.847643] ? mas_walk+0x5c7/0x7c0 [ 33.848117] do_vmi_munmap+0x1f1/0x2b0 [ 33.848611] mmap_region+0x1f9/0x2660 [ 33.849097] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.849614] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.850337] ? __pfx_lock_acquire+0x10/0x10 [ 33.850872] ? __pfx_mmap_region+0x10/0x10 [ 33.851400] ? security_mmap_addr+0x7d/0xa0 [ 33.851943] ? get_unmapped_area+0x1f5/0x3f0 [ 33.852506] do_mmap+0x854/0xf00 [ 33.852953] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.853450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.854023] ksys_mmap_pgoff+0x3af/0x500 [ 33.854551] do_syscall_64+0x3f/0x90 [ 33.855030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.855680] RIP: 0033:0x7fe85b2b4d82 [ 33.856134] 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 [ 33.858299] RSP: 002b:00007ffd54466538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.859214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe85b2b4d82 [ 33.860055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe85a6ee000 [ 33.860906] RBP: 00007fe85a6ee000 R08: 0000000000000009 R09: 0000000000001000 [ 33.861760] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587a9c0cec0 [ 33.862606] R13: 00007ffd54466550 R14: 00007ffd54466580 R15: 00007ffd544668e0 [ 33.863468] [ 33.863763] [ 33.863981] Allocated by task 212: [ 33.864409] kasan_save_stack+0x22/0x50 [ 33.864917] kasan_set_track+0x25/0x30 [ 33.865419] __kasan_slab_alloc+0x59/0x70 [ 33.865939] kmem_cache_alloc+0x16b/0x370 [ 33.866461] vm_area_dup+0x20/0x160 [ 33.866916] __split_vma+0x170/0x950 [ 33.867383] split_vma+0xc6/0x110 [ 33.867830] mprotect_fixup+0x8d2/0xb30 [ 33.868328] do_mprotect_pkey+0x87e/0xd40 [ 33.868856] __x64_sys_mprotect+0x78/0xc0 [ 33.869390] do_syscall_64+0x3f/0x90 [ 33.869888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.870539] [ 33.870761] Freed by task 212: [ 33.871152] kasan_save_stack+0x22/0x50 [ 33.871655] kasan_set_track+0x25/0x30 [ 33.872147] kasan_save_free_info+0x2b/0x50 [ 33.872681] __kasan_slab_free+0x10a/0x190 [ 33.873215] kmem_cache_free+0x10d/0x4d0 [ 33.873730] rcu_core+0x8c8/0x2860 [ 33.874179] __do_softirq+0x1b7/0x7d4 [ 33.874664] [ 33.874881] Last potentially related work creation: [ 33.875482] kasan_save_stack+0x22/0x50 [ 33.875985] __kasan_record_aux_stack+0x8e/0xa0 [ 33.876560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.877201] remove_vma+0x139/0x170 [ 33.877657] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.878208] do_vmi_munmap+0x1f1/0x2b0 [ 33.878688] __vm_munmap+0x138/0x3a0 [ 33.879154] __x64_sys_munmap+0x59/0x80 [ 33.879664] do_syscall_64+0x3f/0x90 [ 33.880131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.880776] [ 33.880990] The buggy address belongs to the object at ffff88800ef7f2b8 [ 33.880990] which belongs to the cache vm_area_struct of size 168 [ 33.882476] The buggy address is located 88 bytes inside of [ 33.882476] freed 168-byte region [ffff88800ef7f2b8, ffff88800ef7f360) [ 33.883873] [ 33.884092] The buggy address belongs to the physical page: [ 33.884741] page:0000000096485e2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef7f [ 33.885862] memcg:ffff88800df00501 [ 33.886292] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.886933] page_type: 0xffffffff() [ 33.887385] raw: 0100000000000200 ffff88800879fc80 ffffea0000333f80 dead000000000008 [ 33.888299] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df00501 [ 33.889206] page dumped because: kasan: bad access detected [ 33.889885] [ 33.890099] Memory state around the buggy address: [ 33.890691] ffff88800ef7f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.891545] ffff88800ef7f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.892451] >ffff88800ef7f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.893326] ^ [ 33.893792] ffff88800ef7f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.894646] ffff88800ef7f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.895496] ================================================================== [ 33.896485] Disabling lock debugging due to kernel taint [ 35.745967] BUG: Bad rss-counter state mm:000000008fd8c69b type:MM_FILEPAGES val:33 [ 35.747508] BUG: Bad rss-counter state mm:000000008fd8c69b type:MM_ANONPAGES val:22 [ 36.232858] BUG: Bad rss-counter state mm:000000007bb99c98 type:MM_FILEPAGES val:33 [ 36.234435] BUG: Bad rss-counter state mm:000000007bb99c98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64203' (ECDSA) to the list of known hosts. 2023/06/20 06:11:24 fuzzer started 2023/06/20 06:11:25 dialing manager at localhost:44161 2023/06/20 06:11:25 checking machine... 2023/06/20 06:11:25 checking revisions... [ 37.036462] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:11:25 testing simple program... [ 37.080957] cgroup: Unknown subsys name 'net' [ 37.142924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:11:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f3b1687cd80 CR3=000000000e768000 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=2034323a31313a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81745a69 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880166c7f01 RSI=ffff8880166c7f20 RDI=ffff8880166c7f20 RBP=ffff8880166c6ff0 RSP=ffff8880166c6f20 R8 =ffffffff86127e40 R9 =ffff8880166c6fd8 R10=0000000000038001 R11=000000000001e468 R12=ffff8880166c6ff8 R13=ffff8880166c6fe0 R14=ffff8880166c7f28 R15=ffff8880166c6f98 RIP=ffffffff8112fbf3 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 00007fec86151900 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=00007fec86116008 CR3=0000000019f94000 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=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