syzkaller login: [ 31.669695] BUG: Bad rss-counter state mm:00000000bf812f69 type:MM_FILEPAGES val:33 [ 31.670929] BUG: Bad rss-counter state mm:00000000bf812f69 type:MM_ANONPAGES val:22 [ 31.824036] ================================================================== [ 31.825119] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.826002] Read of size 8 at addr ffff88801a1c15c8 by task sshd/220 [ 31.826738] [ 31.827010] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.827824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.828734] Call Trace: [ 31.829033] [ 31.829304] dump_stack_lvl+0x91/0xf0 [ 31.829765] print_report+0xcc/0x620 [ 31.830221] ? __virt_addr_valid+0x102/0x340 [ 31.830771] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.831347] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.831930] kasan_report+0xbe/0xf0 [ 31.832380] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.832967] vma_interval_tree_remove+0xc75/0xec0 [ 31.833530] vma_prepare+0xc54/0x11a0 [ 31.833980] __split_vma+0x5af/0x950 [ 31.834430] ? __pfx___split_vma+0x10/0x10 [ 31.834932] ? find_held_lock+0x2c/0x110 [ 31.835424] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.835954] ? lock_is_held_type+0x9f/0x120 [ 31.836460] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.837035] ? mtree_range_walk+0x632/0x900 [ 31.837556] ? mas_walk+0x5c7/0x7c0 [ 31.838006] do_vmi_munmap+0x1f1/0x2b0 [ 31.838481] mmap_region+0x1f9/0x2660 [ 31.838938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.839421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.840098] ? __pfx_lock_acquire+0x10/0x10 [ 31.840600] ? __pfx_mmap_region+0x10/0x10 [ 31.841099] ? security_mmap_addr+0x7d/0xa0 [ 31.841597] ? get_unmapped_area+0x1f5/0x3f0 [ 31.842108] do_mmap+0x854/0xf00 [ 31.842542] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.843011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.843559] ksys_mmap_pgoff+0x3af/0x500 [ 31.844035] do_syscall_64+0x3f/0x90 [ 31.844487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.845088] RIP: 0033:0x7fb4f745ad82 [ 31.845517] 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 [ 31.847517] RSP: 002b:00007ffd9c336018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.848363] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4f745ad82 [ 31.849161] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4f6894000 [ 31.849957] RBP: 00007fb4f6894000 R08: 0000000000000009 R09: 0000000000001000 [ 31.850879] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f1c399ec0 [ 31.851755] R13: 00007ffd9c336030 R14: 00007ffd9c336060 R15: 00007ffd9c3363c0 [ 31.852611] [ 31.852901] [ 31.853115] Allocated by task 213: [ 31.853544] kasan_save_stack+0x22/0x50 [ 31.854045] kasan_set_track+0x25/0x30 [ 31.854556] __kasan_slab_alloc+0x59/0x70 [ 31.855085] kmem_cache_alloc+0x16b/0x370 [ 31.855607] vm_area_dup+0x20/0x160 [ 31.856066] __split_vma+0x170/0x950 [ 31.856547] split_vma+0xc6/0x110 [ 31.856990] mprotect_fixup+0x8d2/0xb30 [ 31.857495] do_mprotect_pkey+0x87e/0xd40 [ 31.858019] __x64_sys_mprotect+0x78/0xc0 [ 31.858559] do_syscall_64+0x3f/0x90 [ 31.859033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.859686] [ 31.859906] Freed by task 213: [ 31.860298] kasan_save_stack+0x22/0x50 [ 31.860811] kasan_set_track+0x25/0x30 [ 31.861307] kasan_save_free_info+0x2b/0x50 [ 31.861835] __kasan_slab_free+0x10a/0x190 [ 31.862384] kmem_cache_free+0x10d/0x4d0 [ 31.862903] rcu_core+0x8c8/0x2860 [ 31.863355] __do_softirq+0x1b7/0x7d4 [ 31.863833] [ 31.864049] Last potentially related work creation: [ 31.864637] kasan_save_stack+0x22/0x50 [ 31.865143] __kasan_record_aux_stack+0x8e/0xa0 [ 31.865721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.866373] remove_vma+0x139/0x170 [ 31.866831] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.867399] do_vmi_munmap+0x1f1/0x2b0 [ 31.867889] __vm_munmap+0x138/0x3a0 [ 31.868363] __x64_sys_munmap+0x59/0x80 [ 31.868870] do_syscall_64+0x3f/0x90 [ 31.869352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.870007] [ 31.870223] The buggy address belongs to the object at ffff88801a1c1570 [ 31.870223] which belongs to the cache vm_area_struct of size 168 [ 31.871727] The buggy address is located 88 bytes inside of [ 31.871727] freed 168-byte region [ffff88801a1c1570, ffff88801a1c1618) [ 31.873156] [ 31.873376] The buggy address belongs to the physical page: [ 31.874043] page:000000001d737d82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1c1 [ 31.875151] memcg:ffff88801a1be101 [ 31.875576] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.876234] page_type: 0xffffffff() [ 31.876692] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.877619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1be101 [ 31.878533] page dumped because: kasan: bad access detected [ 31.879198] [ 31.879412] Memory state around the buggy address: [ 31.880000] ffff88801a1c1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.880857] ffff88801a1c1500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.881722] >ffff88801a1c1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.882592] ^ [ 31.883280] ffff88801a1c1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.884151] ffff88801a1c1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.885015] ================================================================== [ 31.886011] Disabling lock debugging due to kernel taint [ 33.809816] BUG: Bad rss-counter state mm:00000000c4ce316f type:MM_FILEPAGES val:33 [ 33.810949] BUG: Bad rss-counter state mm:00000000c4ce316f type:MM_ANONPAGES val:22 [ 34.260487] BUG: Bad rss-counter state mm:0000000026c8c2f7 type:MM_FILEPAGES val:33 [ 34.261269] BUG: Bad rss-counter state mm:0000000026c8c2f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36300' (ECDSA) to the list of known hosts. 2023/06/19 16:30:38 fuzzer started 2023/06/19 16:30:39 dialing manager at localhost:44161 2023/06/19 16:30:39 checking machine... 2023/06/19 16:30:39 checking revisions... [ 34.952776] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:30:39 testing simple program... [ 35.006861] cgroup: Unknown subsys name 'net' [ 35.068043] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:30:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002874f47 RCX=ffffffff818dfdcf RDX=ffff88800d6451c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880143a7ac0 RSP=ffff8880143a7a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d57c780 R13=0000000000000006 R14=ffff888016525bd8 R15=ffff888016525bd8 RIP=ffffffff814c07e0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1ccb6c0900 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=00007f1ccaae6e70 CR3=000000000f066000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=32a0ee0335b2a1f300000000000ae988 XMM05=eb424133023cb8bb0000000000134940 XMM06=4fda316b135da52b0000000000133730 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b46cc RDX=0000000000000008 RSI=ffff888018e27d80 RDI=ffff888018e27a00 RBP=ffff888018e27a58 RSP=ffff888018e27988 R8 =ffffffff863b46d0 R9 =ffff888018e27a40 R10=0000000000038001 R11=000000000008b078 R12=ffff888018e27a60 R13=ffff888018e27a48 R14=ffff888018e27d88 R15=ffff888018e27a00 RIP=ffffffff811303f0 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 00007f8a8ec58900 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=00007ffc840f0000 CR3=0000000016b10000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000