syzkaller login: [ 69.420324] BUG: Bad rss-counter state mm:00000000d9e4875a type:MM_FILEPAGES val:33 [ 69.421884] BUG: Bad rss-counter state mm:00000000d9e4875a type:MM_ANONPAGES val:22 [ 69.594197] ================================================================== [ 69.595333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.596523] Read of size 8 at addr ffff88800f7b1b38 by task sshd/226 [ 69.597559] [ 69.597798] CPU: 0 PID: 226 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.598889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.599934] Call Trace: [ 69.600279] [ 69.600586] dump_stack_lvl+0x91/0xf0 [ 69.601121] print_report+0xcc/0x620 [ 69.601650] ? __virt_addr_valid+0x102/0x340 [ 69.602244] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.602901] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.603559] kasan_report+0xbe/0xf0 [ 69.604065] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.604750] vma_interval_tree_remove+0xc75/0xec0 [ 69.605448] vma_prepare+0xc54/0x11a0 [ 69.605975] __split_vma+0x5af/0x950 [ 69.606487] ? __pfx___split_vma+0x10/0x10 [ 69.607073] ? find_held_lock+0x2c/0x110 [ 69.607647] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.608271] ? lock_is_held_type+0x9f/0x120 [ 69.608866] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.609549] ? mtree_range_walk+0x632/0x900 [ 69.610158] ? mas_walk+0x5c7/0x7c0 [ 69.610681] do_vmi_munmap+0x1f1/0x2b0 [ 69.611226] mmap_region+0x1f9/0x2660 [ 69.611759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.612325] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.613131] ? __pfx_lock_acquire+0x10/0x10 [ 69.613722] ? __pfx_mmap_region+0x10/0x10 [ 69.614303] ? security_mmap_addr+0x7d/0xa0 [ 69.614893] ? get_unmapped_area+0x1f5/0x3f0 [ 69.615500] do_mmap+0x854/0xf00 [ 69.615989] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.616539] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.617173] ksys_mmap_pgoff+0x3af/0x500 [ 69.617730] do_syscall_64+0x3f/0x90 [ 69.618258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.618972] RIP: 0033:0x7f4a8dbddd82 [ 69.619478] 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 [ 69.621805] RSP: 002b:00007ffe09c1e3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.622794] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a8dbddd82 [ 69.623719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a8d017000 [ 69.624646] RBP: 00007f4a8d017000 R08: 0000000000000009 R09: 0000000000001000 [ 69.625570] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560df4bcfec0 [ 69.626498] R13: 00007ffe09c1e3f0 R14: 00007ffe09c1e420 R15: 00007ffe09c1e780 [ 69.627442] [ 69.627761] [ 69.627993] Allocated by task 219: [ 69.628466] kasan_save_stack+0x22/0x50 [ 69.629038] kasan_set_track+0x25/0x30 [ 69.629568] __kasan_slab_alloc+0x59/0x70 [ 69.630142] kmem_cache_alloc+0x16b/0x370 [ 69.630712] vm_area_dup+0x20/0x160 [ 69.631204] __split_vma+0x170/0x950 [ 69.631709] split_vma+0xc6/0x110 [ 69.632191] mprotect_fixup+0x8d2/0xb30 [ 69.632730] do_mprotect_pkey+0x87e/0xd40 [ 69.633295] __x64_sys_mprotect+0x78/0xc0 [ 69.633845] do_syscall_64+0x3f/0x90 [ 69.634348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.635033] [ 69.635257] Freed by task 219: [ 69.635672] kasan_save_stack+0x22/0x50 [ 69.636204] kasan_set_track+0x25/0x30 [ 69.636732] kasan_save_free_info+0x2b/0x50 [ 69.637291] __kasan_slab_free+0x10a/0x190 [ 69.637866] kmem_cache_free+0x10d/0x4d0 [ 69.638415] rcu_core+0x8c8/0x2860 [ 69.638897] __do_softirq+0x1b7/0x7d4 [ 69.639418] [ 69.639658] Last potentially related work creation: [ 69.640310] kasan_save_stack+0x22/0x50 [ 69.640869] __kasan_record_aux_stack+0x8e/0xa0 [ 69.641509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.642230] remove_vma+0x139/0x170 [ 69.642727] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.643340] do_vmi_munmap+0x1f1/0x2b0 [ 69.643873] __vm_munmap+0x138/0x3a0 [ 69.644384] __x64_sys_munmap+0x59/0x80 [ 69.644938] do_syscall_64+0x3f/0x90 [ 69.645467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.646166] [ 69.646398] The buggy address belongs to the object at ffff88800f7b1ae0 [ 69.646398] which belongs to the cache vm_area_struct of size 168 [ 69.648021] The buggy address is located 88 bytes inside of [ 69.648021] freed 168-byte region [ffff88800f7b1ae0, ffff88800f7b1b88) [ 69.649570] [ 69.649806] The buggy address belongs to the physical page: [ 69.650532] page:00000000c57cc55a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7b1 [ 69.651733] memcg:ffff88800eef7b01 [ 69.652199] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.652906] page_type: 0xffffffff() [ 69.653422] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.654437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eef7b01 [ 69.655441] page dumped because: kasan: bad access detected [ 69.656176] [ 69.656408] Memory state around the buggy address: [ 69.657059] ffff88800f7b1a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.657994] ffff88800f7b1a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 69.658919] >ffff88800f7b1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.659826] ^ [ 69.660490] ffff88800f7b1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 69.661437] ffff88800f7b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 69.662348] ================================================================== [ 69.663424] Disabling lock debugging due to kernel taint [ 72.083242] BUG: Bad rss-counter state mm:000000003ac538ad type:MM_FILEPAGES val:33 [ 72.083862] BUG: Bad rss-counter state mm:000000003ac538ad type:MM_ANONPAGES val:22 [ 72.566747] BUG: Bad rss-counter state mm:0000000013a651fc type:MM_FILEPAGES val:33 [ 72.567924] BUG: Bad rss-counter state mm:0000000013a651fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35499' (ECDSA) to the list of known hosts. 2023/06/20 00:49:11 fuzzer started 2023/06/20 00:49:11 dialing manager at localhost:44161 2023/06/20 00:49:11 checking machine... 2023/06/20 00:49:11 checking revisions... [ 73.284816] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:49:11 testing simple program... [ 73.340699] cgroup: Unknown subsys name 'net' [ 73.409997] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:48:37 Registers: info registers vcpu 0 RAX=000000000000004d RBX=00005594a4d89eb0 RCX=0000000000000065 RDX=00007f56340ff4c0 RSI=00007f5633b75b22 RDI=00005594a4d89eb0 RBP=000000000000001a RSP=00007ffc28385858 R8 =00005594a4db642a R9 =00007f563414cbe0 R10=000000000000006f R11=0000000000000246 R12=00005594a4da7ed0 R13=00007ffc28385868 R14=00007f5633b75b22 R15=00007f5633b9a710 RIP=00007f56340ebaf6 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5633b9a900 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=00007f563414f650 CR3=000000000e064000 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=00000000000000ff0000000000000000 XMM01=00000000000000010000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=20202020202020205249445f4c49414d XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000000000000000ffffffffffffffff XMM08=00000000000000002020200020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888013abad10 RCX=ffff888013abad10 RDX=00000000000d000d RSI=ffff888013abad10 RDI=ffff88800844f780 RBP=ffff888015807618 RSP=ffff888015807580 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea00004eae80 R11=00000000000d000c R12=ffffea00004eae80 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007f7eec324900 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=00007f7eeb775d60 CR3=000000000f48a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7b4d70cbf849a42400000000000ae988 XMM05=b744feef516279bc000000000013e0e8 XMM06=13e856d8d71426c8000000000013cb68 XMM07=fb795ef6d6577056000000000012d508 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000