syzkaller login: [ 44.501908] BUG: Bad rss-counter state mm:0000000004ab7f24 type:MM_FILEPAGES val:33 [ 44.503138] BUG: Bad rss-counter state mm:0000000004ab7f24 type:MM_ANONPAGES val:22 [ 44.629869] ================================================================== [ 44.630577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.631276] Read of size 8 at addr ffff888014724968 by task sshd/220 [ 44.631843] [ 44.632004] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.632638] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.633364] Call Trace: [ 44.633594] [ 44.633800] dump_stack_lvl+0x91/0xf0 [ 44.634251] print_report+0xcc/0x620 [ 44.634626] ? __virt_addr_valid+0x102/0x340 [ 44.635038] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.635499] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.635958] kasan_report+0xbe/0xf0 [ 44.636323] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.636793] vma_interval_tree_remove+0xc75/0xec0 [ 44.637243] vma_prepare+0xc54/0x11a0 [ 44.637592] __split_vma+0x5af/0x950 [ 44.637955] ? __pfx___split_vma+0x10/0x10 [ 44.638321] ? find_held_lock+0x2c/0x110 [ 44.638731] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.639163] ? lock_is_held_type+0x9f/0x120 [ 44.639548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.639979] ? mtree_range_walk+0x632/0x900 [ 44.640377] ? mas_walk+0x5c7/0x7c0 [ 44.640712] do_vmi_munmap+0x1f1/0x2b0 [ 44.641070] mmap_region+0x1f9/0x2660 [ 44.641429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.641811] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.642337] ? __pfx_lock_acquire+0x10/0x10 [ 44.642756] ? __pfx_mmap_region+0x10/0x10 [ 44.643143] ? security_mmap_addr+0x7d/0xa0 [ 44.643533] ? get_unmapped_area+0x1f5/0x3f0 [ 44.643936] do_mmap+0x854/0xf00 [ 44.644259] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.644626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.645043] ksys_mmap_pgoff+0x3af/0x500 [ 44.645429] do_syscall_64+0x3f/0x90 [ 44.645780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.646263] RIP: 0033:0x7ffbe3812d82 [ 44.646614] 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 [ 44.648195] RSP: 002b:00007ffe35fbd4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.648864] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffbe3812d82 [ 44.649540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffbe2c4c000 [ 44.650165] RBP: 00007ffbe2c4c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.650817] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d489c5ec0 [ 44.651442] R13: 00007ffe35fbd4c0 R14: 00007ffe35fbd4f0 R15: 00007ffe35fbd850 [ 44.652078] [ 44.652293] [ 44.652449] Allocated by task 213: [ 44.652778] kasan_save_stack+0x22/0x50 [ 44.653158] kasan_set_track+0x25/0x30 [ 44.653516] __kasan_slab_alloc+0x59/0x70 [ 44.653897] kmem_cache_alloc+0x16b/0x370 [ 44.654271] vm_area_dup+0x20/0x160 [ 44.654622] __split_vma+0x170/0x950 [ 44.654969] split_vma+0xc6/0x110 [ 44.655295] mprotect_fixup+0x8d2/0xb30 [ 44.655669] do_mprotect_pkey+0x87e/0xd40 [ 44.656064] __x64_sys_mprotect+0x78/0xc0 [ 44.656465] do_syscall_64+0x3f/0x90 [ 44.656824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.657317] [ 44.657479] Freed by task 213: [ 44.657773] kasan_save_stack+0x22/0x50 [ 44.658170] kasan_set_track+0x25/0x30 [ 44.658532] kasan_save_free_info+0x2b/0x50 [ 44.658937] __kasan_slab_free+0x10a/0x190 [ 44.659362] kmem_cache_free+0x10d/0x4d0 [ 44.659739] rcu_core+0x8c8/0x2860 [ 44.660062] __do_softirq+0x1b7/0x7d4 [ 44.660416] [ 44.660572] Last potentially related work creation: [ 44.661013] kasan_save_stack+0x22/0x50 [ 44.661394] __kasan_record_aux_stack+0x8e/0xa0 [ 44.661836] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.662311] remove_vma+0x139/0x170 [ 44.662670] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.663082] do_vmi_munmap+0x1f1/0x2b0 [ 44.663446] __vm_munmap+0x138/0x3a0 [ 44.663809] __x64_sys_munmap+0x59/0x80 [ 44.664177] do_syscall_64+0x3f/0x90 [ 44.664526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.664999] [ 44.665158] The buggy address belongs to the object at ffff888014724910 [ 44.665158] which belongs to the cache vm_area_struct of size 168 [ 44.666254] The buggy address is located 88 bytes inside of [ 44.666254] freed 168-byte region [ffff888014724910, ffff8880147249b8) [ 44.667336] [ 44.667498] The buggy address belongs to the physical page: [ 44.667999] page:00000000e756aaca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14724 [ 44.668815] memcg:ffff888016803d01 [ 44.669132] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.669605] page_type: 0xffffffff() [ 44.669943] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.670635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016803d01 [ 44.671324] page dumped because: kasan: bad access detected [ 44.671813] [ 44.671972] Memory state around the buggy address: [ 44.672425] ffff888014724800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 44.673024] ffff888014724880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 44.673621] >ffff888014724900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.674219] ^ [ 44.674798] ffff888014724980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 44.675402] ffff888014724a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.676005] ================================================================== [ 44.676733] Disabling lock debugging due to kernel taint [ 46.482954] BUG: Bad rss-counter state mm:00000000795c87e7 type:MM_FILEPAGES val:33 [ 46.483691] BUG: Bad rss-counter state mm:00000000795c87e7 type:MM_ANONPAGES val:22 [ 46.852841] BUG: Bad rss-counter state mm:000000009fc94c51 type:MM_FILEPAGES val:33 [ 46.853509] BUG: Bad rss-counter state mm:000000009fc94c51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54142' (ECDSA) to the list of known hosts. 2023/06/20 09:16:02 fuzzer started 2023/06/20 09:16:02 dialing manager at localhost:44161 2023/06/20 09:16:02 checking machine... 2023/06/20 09:16:02 checking revisions... [ 47.417875] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:16:02 testing simple program... [ 47.469041] cgroup: Unknown subsys name 'net' [ 47.516818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:15:47 Registers: info registers vcpu 0 RAX=00000000000000ba RBX=000056005de0b360 RCX=00007f4e1308ed47 RDX=00000000ffffffff RSI=ffffffffffffffff RDI=000056005de0b360 RBP=0000000000000057 RSP=00007ffe329d4868 R8 =0000000064916e52 R9 =00007ffe329d6080 R10=00007ffe329d6080 R11=0000000000000202 R12=0000000000000057 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84600004 RFL=00000002 [-------] 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 00007f4e127c5900 00000000 00000000 GS =0000 0000000000000000 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=00007f4e11bb99c0 CR3=000000000ca72000 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=d220feddd1025f9a4e4e60e9ce6895d1 XMM02=2c67c8bc2e329bc3000000000011d680 XMM03=fb795ef6d65770560000000000124928 XMM04=6933e98b97263c7c00000000000ae988 XMM05=2956a14cfc60d4760000000000134c98 XMM06=4fda316b135da52b0000000000134690 XMM07=e042d86d42eb936e0000000000124ba8 XMM08=583c9bc8e7769ef2000000000011d6e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffff888008e579f8 RDX=1ffff110011caf2b RSI=ffff888008e579f0 RDI=ffff888008e57958 RBP=ffff888008e579f0 RSP=ffff888008e57940 R8 =0000000000000001 R9 =ffff888008e57998 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e57a20 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800dc84300 RIP=ffffffff81130357 RFL=00000216 [----AP-] 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 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=00007fff9f0c2000 CR3=000000000ed80000 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