syzkaller login: [ 30.688727] BUG: Bad rss-counter state mm:000000004d91e868 type:MM_FILEPAGES val:33 [ 30.690287] BUG: Bad rss-counter state mm:000000004d91e868 type:MM_ANONPAGES val:22 [ 30.860285] ================================================================== [ 30.861242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.862225] Read of size 8 at addr ffff88800e1ca880 by task sshd/220 [ 30.863026] [ 30.863369] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.864267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.865282] Call Trace: [ 30.865631] [ 30.865928] dump_stack_lvl+0x91/0xf0 [ 30.866470] print_report+0xcc/0x620 [ 30.866975] ? __virt_addr_valid+0x102/0x340 [ 30.867548] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868196] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868847] kasan_report+0xbe/0xf0 [ 30.869353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870012] vma_interval_tree_remove+0xc75/0xec0 [ 30.870656] vma_prepare+0xc54/0x11a0 [ 30.871162] __split_vma+0x5af/0x950 [ 30.871657] ? __pfx___split_vma+0x10/0x10 [ 30.872216] ? find_held_lock+0x2c/0x110 [ 30.872769] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.873356] ? lock_is_held_type+0x9f/0x120 [ 30.873921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.874565] ? mtree_range_walk+0x632/0x900 [ 30.875141] ? mas_walk+0x5c7/0x7c0 [ 30.875636] do_vmi_munmap+0x1f1/0x2b0 [ 30.876147] mmap_region+0x1f9/0x2660 [ 30.876645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.877175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.877914] ? __pfx_lock_acquire+0x10/0x10 [ 30.878481] ? __pfx_mmap_region+0x10/0x10 [ 30.879044] ? security_mmap_addr+0x7d/0xa0 [ 30.879599] ? get_unmapped_area+0x1f5/0x3f0 [ 30.880170] do_mmap+0x854/0xf00 [ 30.880630] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.881137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.881715] ksys_mmap_pgoff+0x3af/0x500 [ 30.882252] do_syscall_64+0x3f/0x90 [ 30.882750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883420] RIP: 0033:0x7f3cd1527d82 [ 30.883900] 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 [ 30.886085] RSP: 002b:00007ffdd4ce7218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.887039] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cd1527d82 [ 30.887917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cd0961000 [ 30.888789] RBP: 00007f3cd0961000 R08: 0000000000000009 R09: 0000000000001000 [ 30.889667] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b740df8d90 [ 30.890571] R13: 00007ffdd4ce7230 R14: 00007ffdd4ce7260 R15: 00007ffdd4ce75c0 [ 30.891451] [ 30.891751] [ 30.891974] Allocated by task 213: [ 30.892411] kasan_save_stack+0x22/0x50 [ 30.892933] kasan_set_track+0x25/0x30 [ 30.893434] __kasan_slab_alloc+0x59/0x70 [ 30.893968] kmem_cache_alloc+0x16b/0x370 [ 30.894518] vm_area_dup+0x20/0x160 [ 30.894985] __split_vma+0x170/0x950 [ 30.895462] split_vma+0xc6/0x110 [ 30.895914] mprotect_fixup+0x8d2/0xb30 [ 30.896427] do_mprotect_pkey+0x87e/0xd40 [ 30.896963] __x64_sys_mprotect+0x78/0xc0 [ 30.897496] do_syscall_64+0x3f/0x90 [ 30.897981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898651] [ 30.898870] Freed by task 213: [ 30.899277] kasan_save_stack+0x22/0x50 [ 30.899797] kasan_set_track+0x25/0x30 [ 30.900298] kasan_save_free_info+0x2b/0x50 [ 30.900845] __kasan_slab_free+0x10a/0x190 [ 30.901394] kmem_cache_free+0x10d/0x4d0 [ 30.901916] rcu_core+0x8c8/0x2860 [ 30.902385] __do_softirq+0x1b7/0x7d4 [ 30.902875] [ 30.903094] Last potentially related work creation: [ 30.903701] kasan_save_stack+0x22/0x50 [ 30.904296] __kasan_record_aux_stack+0x8e/0xa0 [ 30.904890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.905557] remove_vma+0x139/0x170 [ 30.906016] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.906608] do_vmi_munmap+0x1f1/0x2b0 [ 30.907105] __vm_munmap+0x138/0x3a0 [ 30.907587] __x64_sys_munmap+0x59/0x80 [ 30.908094] do_syscall_64+0x3f/0x90 [ 30.908589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909254] [ 30.909473] The buggy address belongs to the object at ffff88800e1ca828 [ 30.909473] which belongs to the cache vm_area_struct of size 168 [ 30.910988] The buggy address is located 88 bytes inside of [ 30.910988] freed 168-byte region [ffff88800e1ca828, ffff88800e1ca8d0) [ 30.912418] [ 30.912637] The buggy address belongs to the physical page: [ 30.913304] page:00000000fc55a944 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ca [ 30.914408] memcg:ffff88800f1fa901 [ 30.914838] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.915488] page_type: 0xffffffff() [ 30.915944] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.916883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1fa901 [ 30.917820] page dumped because: kasan: bad access detected [ 30.918514] [ 30.918741] Memory state around the buggy address: [ 30.919341] ffff88800e1ca780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.920218] ffff88800e1ca800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.921120] >ffff88800e1ca880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.922019] ^ [ 30.922462] ffff88800e1ca900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.923336] ffff88800e1ca980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.924214] ================================================================== [ 30.925183] Disabling lock debugging due to kernel taint [ 32.955780] BUG: Bad rss-counter state mm:00000000d106aac7 type:MM_FILEPAGES val:33 [ 32.957254] BUG: Bad rss-counter state mm:00000000d106aac7 type:MM_ANONPAGES val:22 [ 33.423707] BUG: Bad rss-counter state mm:00000000392df714 type:MM_FILEPAGES val:33 [ 33.425128] BUG: Bad rss-counter state mm:00000000392df714 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35822' (ECDSA) to the list of known hosts. 2023/06/20 19:15:35 fuzzer started 2023/06/20 19:15:35 dialing manager at localhost:36067 2023/06/20 19:15:35 checking machine... 2023/06/20 19:15:35 checking revisions... [ 34.172321] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:15:35 testing simple program... [ 34.227373] cgroup: Unknown subsys name 'net' [ 34.268465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:15:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000057 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=0000000000000058 RSP=ffff88806ce09e68 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800eb3f670 RIP=ffffffff813782f8 RFL=00000202 [-------] 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 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=000055e2ff30f290 CR3=0000000005482000 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=00007fd2069fb510000056386f1e3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800c7c7e88 RSI=ffff88800c7c7e50 RDI=ffff88800c7c7858 RBP=ffff88800c7c78e0 RSP=ffff88800c7c7848 R8 =0000000000000001 R9 =ffff88800c7c7888 R10=0000000000038001 R11=000000000008a8e5 R12=ffff88800c7c7910 R13=0000000000000000 R14=ffff888015bb51c0 R15=0000000000092cc0 RIP=ffffffff810bd05d RFL=00000292 [--S-A--] 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 00007f3ba1898900 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=00007ffd77fb4000 CR3=000000000e89a000 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