syzkaller login: [ 30.210824] BUG: Bad rss-counter state mm:00000000e2c20c55 type:MM_FILEPAGES val:33 [ 30.212178] BUG: Bad rss-counter state mm:00000000e2c20c55 type:MM_ANONPAGES val:22 [ 30.356054] ================================================================== [ 30.357166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.358308] Read of size 8 at addr ffff888017d9c880 by task sshd/221 [ 30.359451] [ 30.359718] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.360807] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.361902] Call Trace: [ 30.362231] [ 30.362522] dump_stack_lvl+0x91/0xf0 [ 30.363071] print_report+0xcc/0x620 [ 30.363568] ? __virt_addr_valid+0x102/0x340 [ 30.364138] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.364790] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.365429] kasan_report+0xbe/0xf0 [ 30.365916] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.366554] vma_interval_tree_remove+0xc75/0xec0 [ 30.367218] vma_prepare+0xc54/0x11a0 [ 30.367712] __split_vma+0x5af/0x950 [ 30.368197] ? __pfx___split_vma+0x10/0x10 [ 30.368773] ? find_held_lock+0x2c/0x110 [ 30.369311] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.369951] ? lock_is_held_type+0x9f/0x120 [ 30.370577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.371319] ? mtree_range_walk+0x632/0x900 [ 30.371955] ? mas_walk+0x5c7/0x7c0 [ 30.372500] do_vmi_munmap+0x1f1/0x2b0 [ 30.373086] mmap_region+0x1f9/0x2660 [ 30.373649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.374235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.375093] ? __pfx_lock_acquire+0x10/0x10 [ 30.375712] ? __pfx_mmap_region+0x10/0x10 [ 30.376321] ? security_mmap_addr+0x7d/0xa0 [ 30.376954] ? get_unmapped_area+0x1f5/0x3f0 [ 30.377589] do_mmap+0x854/0xf00 [ 30.378095] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.378666] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.379357] ksys_mmap_pgoff+0x3af/0x500 [ 30.379942] do_syscall_64+0x3f/0x90 [ 30.380504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.381282] RIP: 0033:0x7f336b073d82 [ 30.381811] 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 [ 30.384310] RSP: 002b:00007fff3959a378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.385383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f336b073d82 [ 30.386361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f336a4ad000 [ 30.387378] RBP: 00007f336a4ad000 R08: 0000000000000009 R09: 0000000000001000 [ 30.388350] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ec3ca6ec0 [ 30.389347] R13: 00007fff3959a390 R14: 00007fff3959a3c0 R15: 00007fff3959a720 [ 30.390337] [ 30.390675] [ 30.390962] Allocated by task 214: [ 30.391465] kasan_save_stack+0x22/0x50 [ 30.392044] kasan_set_track+0x25/0x30 [ 30.392642] __kasan_slab_alloc+0x59/0x70 [ 30.393231] kmem_cache_alloc+0x16b/0x370 [ 30.393810] vm_area_dup+0x20/0x160 [ 30.394322] __split_vma+0x170/0x950 [ 30.394856] split_vma+0xc6/0x110 [ 30.395379] mprotect_fixup+0x8d2/0xb30 [ 30.395941] do_mprotect_pkey+0x87e/0xd40 [ 30.396527] __x64_sys_mprotect+0x78/0xc0 [ 30.397124] do_syscall_64+0x3f/0x90 [ 30.397663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.398387] [ 30.398632] Freed by task 214: [ 30.399117] kasan_save_stack+0x22/0x50 [ 30.399750] kasan_set_track+0x25/0x30 [ 30.400299] kasan_save_free_info+0x2b/0x50 [ 30.400935] __kasan_slab_free+0x10a/0x190 [ 30.401535] kmem_cache_free+0x10d/0x4d0 [ 30.402106] rcu_core+0x8c8/0x2860 [ 30.402604] __do_softirq+0x1b7/0x7d4 [ 30.403175] [ 30.403421] Last potentially related work creation: [ 30.404070] kasan_save_stack+0x22/0x50 [ 30.404649] __kasan_record_aux_stack+0x8e/0xa0 [ 30.405290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.406002] remove_vma+0x139/0x170 [ 30.406507] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.407173] do_vmi_munmap+0x1f1/0x2b0 [ 30.407716] __vm_munmap+0x138/0x3a0 [ 30.408241] __x64_sys_munmap+0x59/0x80 [ 30.408809] do_syscall_64+0x3f/0x90 [ 30.409367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.410097] [ 30.410340] The buggy address belongs to the object at ffff888017d9c828 [ 30.410340] which belongs to the cache vm_area_struct of size 168 [ 30.412044] The buggy address is located 88 bytes inside of [ 30.412044] freed 168-byte region [ffff888017d9c828, ffff888017d9c8d0) [ 30.413668] [ 30.413913] The buggy address belongs to the physical page: [ 30.414668] page:000000002e4017ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d9c [ 30.415945] memcg:ffff88800de1ea01 [ 30.416433] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.417174] page_type: 0xffffffff() [ 30.417689] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.418729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de1ea01 [ 30.419791] page dumped because: kasan: bad access detected [ 30.420553] [ 30.420802] Memory state around the buggy address: [ 30.421459] ffff888017d9c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.422428] ffff888017d9c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.423442] >ffff888017d9c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.424409] ^ [ 30.424902] ffff888017d9c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.425864] ffff888017d9c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.426831] ================================================================== [ 30.428040] Disabling lock debugging due to kernel taint [ 32.868529] BUG: Bad rss-counter state mm:00000000170a9e67 type:MM_FILEPAGES val:33 [ 32.869678] BUG: Bad rss-counter state mm:00000000170a9e67 type:MM_ANONPAGES val:22 [ 33.350871] BUG: Bad rss-counter state mm:00000000611a3727 type:MM_FILEPAGES val:33 [ 33.351876] BUG: Bad rss-counter state mm:00000000611a3727 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5847' (ECDSA) to the list of known hosts. 2023/06/20 11:26:44 fuzzer started 2023/06/20 11:26:44 dialing manager at localhost:36067 2023/06/20 11:26:44 checking machine... 2023/06/20 11:26:44 checking revisions... [ 34.096363] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:26:44 testing simple program... [ 34.151738] cgroup: Unknown subsys name 'net' [ 34.206570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:26:44 Registers: info registers vcpu 0 RAX=ffffffff863b24fd RBX=0000000000000001 RCX=ffffffff863b24f8 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85fa4464 RBP=ffff88800cf2f930 RSP=ffff88800cf2f868 R8 =ffffffff863b24f8 R9 =ffff88800cf2f918 R10=0000000000038001 R11=000000000008a6a8 R12=ffff88800cf2f938 R13=ffff88800cf2f920 R14=ffff88800cf2f919 R15=ffff88800cf2f8d8 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 00007f9a852dd900 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=00007f9a85894618 CR3=0000000009540000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007ffb0d063c00 CR3=000000000c6e8000 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=006fba417ef36e813b45829c03e755e9 XMM02=000000000011ac80ec2efd57dc4c00df XMM03=00000000001221f806b91e9fc3b33d10 XMM04=74ef4f56fe1e07e900000000000ae988 XMM05=e4cb8bb95a7664b60000000000132050 XMM06=05ab0f7a0fc993600000000000130eb8 XMM07=e042d86d42eb936e0000000000122478 XMM08=06b91e9fc3b33d10000000000011ace0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000