syzkaller login: [ 30.662564] BUG: Bad rss-counter state mm:00000000f8b53540 type:MM_FILEPAGES val:33 [ 30.663523] BUG: Bad rss-counter state mm:00000000f8b53540 type:MM_ANONPAGES val:22 [ 30.832932] ================================================================== [ 30.834016] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.835110] Read of size 8 at addr ffff88800c5c4c20 by task sshd/221 [ 30.836183] [ 30.836398] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.837250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.838267] Call Trace: [ 30.838587] [ 30.838871] dump_stack_lvl+0x91/0xf0 [ 30.839362] print_report+0xcc/0x620 [ 30.839839] ? __virt_addr_valid+0x102/0x340 [ 30.840415] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.841028] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.841651] kasan_report+0xbe/0xf0 [ 30.842131] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842751] vma_interval_tree_remove+0xc75/0xec0 [ 30.843387] vma_prepare+0xc54/0x11a0 [ 30.843875] __split_vma+0x5af/0x950 [ 30.844354] ? __pfx___split_vma+0x10/0x10 [ 30.844877] ? find_held_lock+0x2c/0x110 [ 30.845400] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.845969] ? lock_is_held_type+0x9f/0x120 [ 30.846513] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.847117] ? mtree_range_walk+0x632/0x900 [ 30.847676] ? mas_walk+0x5c7/0x7c0 [ 30.848176] do_vmi_munmap+0x1f1/0x2b0 [ 30.848674] mmap_region+0x1f9/0x2660 [ 30.849152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.849660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.850386] ? __pfx_lock_acquire+0x10/0x10 [ 30.850911] ? __pfx_mmap_region+0x10/0x10 [ 30.851439] ? security_mmap_addr+0x7d/0xa0 [ 30.851978] ? get_unmapped_area+0x1f5/0x3f0 [ 30.852527] do_mmap+0x854/0xf00 [ 30.852969] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.853461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.854027] ksys_mmap_pgoff+0x3af/0x500 [ 30.854534] do_syscall_64+0x3f/0x90 [ 30.855011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.855656] RIP: 0033:0x7f791042dd82 [ 30.856135] 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 [ 30.858237] RSP: 002b:00007ffe753b17d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.859171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f791042dd82 [ 30.860028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f790f867000 [ 30.860866] RBP: 00007f790f867000 R08: 0000000000000009 R09: 0000000000001000 [ 30.861706] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559656235ec0 [ 30.862547] R13: 00007ffe753b17f0 R14: 00007ffe753b1820 R15: 00007ffe753b1b80 [ 30.863407] [ 30.863697] [ 30.863938] Allocated by task 214: [ 30.864375] kasan_save_stack+0x22/0x50 [ 30.864878] kasan_set_track+0x25/0x30 [ 30.865374] __kasan_slab_alloc+0x59/0x70 [ 30.865898] kmem_cache_alloc+0x16b/0x370 [ 30.866406] vm_area_dup+0x20/0x160 [ 30.866859] __split_vma+0x170/0x950 [ 30.867325] split_vma+0xc6/0x110 [ 30.867757] mprotect_fixup+0x8d2/0xb30 [ 30.868266] do_mprotect_pkey+0x87e/0xd40 [ 30.868779] __x64_sys_mprotect+0x78/0xc0 [ 30.869297] do_syscall_64+0x3f/0x90 [ 30.869775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.870414] [ 30.870634] Freed by task 13: [ 30.871023] kasan_save_stack+0x22/0x50 [ 30.871555] kasan_set_track+0x25/0x30 [ 30.872073] kasan_save_free_info+0x2b/0x50 [ 30.872603] __kasan_slab_free+0x10a/0x190 [ 30.873136] kmem_cache_free+0x10d/0x4d0 [ 30.873643] rcu_core+0x8c8/0x2860 [ 30.874083] __do_softirq+0x1b7/0x7d4 [ 30.874571] [ 30.874788] Last potentially related work creation: [ 30.875363] kasan_save_stack+0x22/0x50 [ 30.875879] __kasan_record_aux_stack+0x8e/0xa0 [ 30.876515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.877152] remove_vma+0x139/0x170 [ 30.877599] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.878154] do_vmi_munmap+0x1f1/0x2b0 [ 30.878630] __vm_munmap+0x138/0x3a0 [ 30.879093] __x64_sys_munmap+0x59/0x80 [ 30.879583] do_syscall_64+0x3f/0x90 [ 30.880058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880694] [ 30.880908] The buggy address belongs to the object at ffff88800c5c4bc8 [ 30.880908] which belongs to the cache vm_area_struct of size 168 [ 30.882350] The buggy address is located 88 bytes inside of [ 30.882350] freed 168-byte region [ffff88800c5c4bc8, ffff88800c5c4c70) [ 30.883736] [ 30.883961] The buggy address belongs to the physical page: [ 30.884605] page:00000000528ea59e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5c4 [ 30.885673] memcg:ffff88801a34c601 [ 30.886093] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.886731] page_type: 0xffffffff() [ 30.887177] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.888106] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a34c601 [ 30.888998] page dumped because: kasan: bad access detected [ 30.889645] [ 30.889859] Memory state around the buggy address: [ 30.890447] ffff88800c5c4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.891294] ffff88800c5c4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.892141] >ffff88800c5c4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.892979] ^ [ 30.893502] ffff88800c5c4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.894347] ffff88800c5c4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.895210] ================================================================== [ 30.896232] Disabling lock debugging due to kernel taint [ 33.782090] BUG: Bad rss-counter state mm:00000000ae3c37d6 type:MM_FILEPAGES val:33 [ 33.783096] BUG: Bad rss-counter state mm:00000000ae3c37d6 type:MM_ANONPAGES val:22 [ 34.327408] BUG: Bad rss-counter state mm:00000000871e8e68 type:MM_FILEPAGES val:33 [ 34.328620] BUG: Bad rss-counter state mm:00000000871e8e68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24477' (ECDSA) to the list of known hosts. 2023/06/21 04:06:44 fuzzer started 2023/06/21 04:06:44 dialing manager at localhost:36067 2023/06/21 04:06:44 checking machine... 2023/06/21 04:06:44 checking revisions... [ 34.993361] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:06:44 testing simple program... [ 35.050594] cgroup: Unknown subsys name 'net' [ 35.104177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:06:44 Registers: info registers vcpu 0 RAX=ffffffff861390ad RBX=0000000000000001 RCX=ffffffff861390a8 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85dfe158 RBP=ffff88800fea7990 RSP=ffff88800fea78c8 R8 =ffffffff86139066 R9 =ffff88800fea7978 R10=0000000000038001 R11=0000000000020de5 R12=ffff88800fea7998 R13=ffff88800fea7980 R14=ffff88800fea7979 R15=ffff88800fea7938 RIP=ffffffff81130a72 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 00007f0b68c0b900 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=00007f0b691c30b0 CR3=000000000eb0c000 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=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 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=0000000000000001 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=00007fcaf9c4f0a0 CR3=000000000efca000 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=91ebde9b9e8e3c8ddf40a5a17ed0c5be XMM02=000000000011a910ec2efd57dc4c00df XMM03=0000000000121b80433d89360c9c7d14 XMM04=2d918677b984fdd700000000000ae988 XMM05=5786a15264b98be10000000000132a60 XMM06=c291bd5c70af25b90000000000131b00 XMM07=e042d86d42eb936e0000000000121e00 XMM08=433d89360c9c7d14000000000011a970 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000