syzkaller login: [ 30.470495] BUG: Bad rss-counter state mm:00000000690702c5 type:MM_FILEPAGES val:33 [ 30.471889] BUG: Bad rss-counter state mm:00000000690702c5 type:MM_ANONPAGES val:22 [ 30.639546] ================================================================== [ 30.640466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.641445] Read of size 8 at addr ffff88800f12f228 by task sshd/220 [ 30.642217] [ 30.642433] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.643526] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.644496] Call Trace: [ 30.644824] [ 30.645119] dump_stack_lvl+0x91/0xf0 [ 30.645609] print_report+0xcc/0x620 [ 30.646091] ? __virt_addr_valid+0x102/0x340 [ 30.646642] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.647257] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.647881] kasan_report+0xbe/0xf0 [ 30.648365] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649000] vma_interval_tree_remove+0xc75/0xec0 [ 30.649617] vma_prepare+0xc54/0x11a0 [ 30.650097] __split_vma+0x5af/0x950 [ 30.650571] ? __pfx___split_vma+0x10/0x10 [ 30.651108] ? find_held_lock+0x2c/0x110 [ 30.651638] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.652202] ? lock_is_held_type+0x9f/0x120 [ 30.652749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.653356] ? mtree_range_walk+0x632/0x900 [ 30.653903] ? mas_walk+0x5c7/0x7c0 [ 30.654381] do_vmi_munmap+0x1f1/0x2b0 [ 30.654865] mmap_region+0x1f9/0x2660 [ 30.655352] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.655877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.656588] ? __pfx_lock_acquire+0x10/0x10 [ 30.657140] ? __pfx_mmap_region+0x10/0x10 [ 30.657666] ? security_mmap_addr+0x7d/0xa0 [ 30.658205] ? get_unmapped_area+0x1f5/0x3f0 [ 30.658760] do_mmap+0x854/0xf00 [ 30.659204] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.659698] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.660270] ksys_mmap_pgoff+0x3af/0x500 [ 30.660805] do_syscall_64+0x3f/0x90 [ 30.661297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.661957] RIP: 0033:0x7fdc7e5e7d82 [ 30.662424] 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 [ 30.664575] RSP: 002b:00007ffc3a253188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.665490] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc7e5e7d82 [ 30.666336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc7da21000 [ 30.667191] RBP: 00007fdc7da21000 R08: 0000000000000009 R09: 0000000000001000 [ 30.668041] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562fea7f2f70 [ 30.668913] R13: 00007ffc3a2531a0 R14: 00007ffc3a2531d0 R15: 00007ffc3a253530 [ 30.669772] [ 30.670065] [ 30.670279] Allocated by task 213: [ 30.670709] kasan_save_stack+0x22/0x50 [ 30.671216] kasan_set_track+0x25/0x30 [ 30.671725] __kasan_slab_alloc+0x59/0x70 [ 30.672247] kmem_cache_alloc+0x16b/0x370 [ 30.672770] vm_area_dup+0x20/0x160 [ 30.673221] __split_vma+0x170/0x950 [ 30.673699] split_vma+0xc6/0x110 [ 30.674142] mprotect_fixup+0x8d2/0xb30 [ 30.674648] do_mprotect_pkey+0x87e/0xd40 [ 30.675173] __x64_sys_mprotect+0x78/0xc0 [ 30.675692] do_syscall_64+0x3f/0x90 [ 30.676168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676824] [ 30.677039] Freed by task 213: [ 30.677433] kasan_save_stack+0x22/0x50 [ 30.677934] kasan_set_track+0x25/0x30 [ 30.678428] kasan_save_free_info+0x2b/0x50 [ 30.678964] __kasan_slab_free+0x10a/0x190 [ 30.679495] kmem_cache_free+0x10d/0x4d0 [ 30.680000] rcu_core+0x8c8/0x2860 [ 30.680445] __do_softirq+0x1b7/0x7d4 [ 30.680941] [ 30.681154] Last potentially related work creation: [ 30.681837] kasan_save_stack+0x22/0x50 [ 30.682342] __kasan_record_aux_stack+0x8e/0xa0 [ 30.682915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.683569] remove_vma+0x139/0x170 [ 30.684017] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.684576] do_vmi_munmap+0x1f1/0x2b0 [ 30.685069] __vm_munmap+0x138/0x3a0 [ 30.685535] __x64_sys_munmap+0x59/0x80 [ 30.686030] do_syscall_64+0x3f/0x90 [ 30.686520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.687170] [ 30.687386] The buggy address belongs to the object at ffff88800f12f1d0 [ 30.687386] which belongs to the cache vm_area_struct of size 168 [ 30.688859] The buggy address is located 88 bytes inside of [ 30.688859] freed 168-byte region [ffff88800f12f1d0, ffff88800f12f278) [ 30.690272] [ 30.690491] The buggy address belongs to the physical page: [ 30.691151] page:00000000fc1c0a5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf12f [ 30.692239] memcg:ffff88800e81c401 [ 30.692676] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.693332] page_type: 0xffffffff() [ 30.693788] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.694712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e81c401 [ 30.695617] page dumped because: kasan: bad access detected [ 30.696274] [ 30.696489] Memory state around the buggy address: [ 30.697086] ffff88800f12f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.697936] ffff88800f12f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.698793] >ffff88800f12f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.699641] ^ [ 30.700198] ffff88800f12f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.701081] ffff88800f12f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.701938] ================================================================== [ 30.702865] Disabling lock debugging due to kernel taint [ 33.358674] BUG: Bad rss-counter state mm:0000000091a07e52 type:MM_FILEPAGES val:33 [ 33.359730] BUG: Bad rss-counter state mm:0000000091a07e52 type:MM_ANONPAGES val:22 [ 33.856740] BUG: Bad rss-counter state mm:00000000f38d4864 type:MM_FILEPAGES val:33 [ 33.858021] BUG: Bad rss-counter state mm:00000000f38d4864 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35178' (ECDSA) to the list of known hosts. 2023/06/20 15:38:15 fuzzer started 2023/06/20 15:38:15 dialing manager at localhost:36067 2023/06/20 15:38:15 checking machine... 2023/06/20 15:38:15 checking revisions... [ 34.560311] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:38:15 testing simple program... [ 34.613452] cgroup: Unknown subsys name 'net' [ 34.658780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:38:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f730575c000 CR3=0000000008c78000 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=dce3b776815dfea9264f674be350d8a8 XMM02=000000000011a5d0ec2efd57dc4c00df XMM03=000000000012187844f3c44e2318d637 XMM04=31c36a79b2cb126e00000000000ae988 XMM05=355d9b4b0a3876540000000000132800 XMM06=4fda316b135da52b00000000001318a0 XMM07=e042d86d42eb936e0000000000121af8 XMM08=44f3c44e2318d637000000000011a630 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e557b80 RCX=ffff88800e557b80 RDX=00000000000c000a RSI=ffff88800e557b80 RDI=ffff8880087b8780 RBP=ffff888016e47a28 RSP=ffff888016e47990 R8 =00000000000c0009 R9 =0000000000000000 R10=ffffea0000395580 R11=00000000000d000c R12=ffffea0000395580 R13=ffff88800e556780 R14=00000000000c0009 R15=ffff8880087b8780 RIP=ffffffff81809672 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 00007f2aecaf4900 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=00007fffb38d5000 CR3=000000000f216000 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=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