syzkaller login: [ 38.684574] BUG: Bad rss-counter state mm:0000000065a77473 type:MM_FILEPAGES val:33 [ 38.685614] BUG: Bad rss-counter state mm:0000000065a77473 type:MM_ANONPAGES val:22 [ 38.848531] ================================================================== [ 38.849466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.850409] Read of size 8 at addr ffff88800f2f3a50 by task sshd/220 [ 38.851183] [ 38.851496] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.852372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.853370] Call Trace: [ 38.853691] [ 38.853982] dump_stack_lvl+0x91/0xf0 [ 38.854477] print_report+0xcc/0x620 [ 38.854965] ? __virt_addr_valid+0x102/0x340 [ 38.855520] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.856139] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.856761] kasan_report+0xbe/0xf0 [ 38.857233] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857893] vma_interval_tree_remove+0xc75/0xec0 [ 38.858534] vma_prepare+0xc54/0x11a0 [ 38.859041] __split_vma+0x5af/0x950 [ 38.859540] ? __pfx___split_vma+0x10/0x10 [ 38.860113] ? find_held_lock+0x2c/0x110 [ 38.860670] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.861280] ? lock_is_held_type+0x9f/0x120 [ 38.861899] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.862552] ? mtree_range_walk+0x632/0x900 [ 38.863134] ? mas_walk+0x5c7/0x7c0 [ 38.863647] do_vmi_munmap+0x1f1/0x2b0 [ 38.864168] mmap_region+0x1f9/0x2660 [ 38.864686] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.865238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866009] ? __pfx_lock_acquire+0x10/0x10 [ 38.866577] ? __pfx_mmap_region+0x10/0x10 [ 38.867138] ? security_mmap_addr+0x7d/0xa0 [ 38.867712] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868293] do_mmap+0x854/0xf00 [ 38.868768] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.869908] ksys_mmap_pgoff+0x3af/0x500 [ 38.870457] do_syscall_64+0x3f/0x90 [ 38.870975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871660] RIP: 0033:0x7f17127ced82 [ 38.872157] 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 [ 38.874451] RSP: 002b:00007ffefe108d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.875427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17127ced82 [ 38.876336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1711c08000 [ 38.877233] RBP: 00007f1711c08000 R08: 0000000000000009 R09: 0000000000001000 [ 38.878139] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f89406ec0 [ 38.879008] R13: 00007ffefe108db0 R14: 00007ffefe108de0 R15: 00007ffefe109140 [ 38.879895] [ 38.880190] [ 38.880411] Allocated by task 213: [ 38.880872] kasan_save_stack+0x22/0x50 [ 38.881421] kasan_set_track+0x25/0x30 [ 38.881954] __kasan_slab_alloc+0x59/0x70 [ 38.882490] kmem_cache_alloc+0x16b/0x370 [ 38.883028] vm_area_dup+0x20/0x160 [ 38.883504] __split_vma+0x170/0x950 [ 38.883995] split_vma+0xc6/0x110 [ 38.884445] mprotect_fixup+0x8d2/0xb30 [ 38.884976] do_mprotect_pkey+0x87e/0xd40 [ 38.885540] __x64_sys_mprotect+0x78/0xc0 [ 38.886077] do_syscall_64+0x3f/0x90 [ 38.886556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887201] [ 38.887415] Freed by task 213: [ 38.887809] kasan_save_stack+0x22/0x50 [ 38.888328] kasan_set_track+0x25/0x30 [ 38.888853] kasan_save_free_info+0x2b/0x50 [ 38.889419] __kasan_slab_free+0x10a/0x190 [ 38.889970] kmem_cache_free+0x10d/0x4d0 [ 38.890490] rcu_core+0x8c8/0x2860 [ 38.890947] __do_softirq+0x1b7/0x7d4 [ 38.891443] [ 38.891661] Last potentially related work creation: [ 38.892267] kasan_save_stack+0x22/0x50 [ 38.892802] __kasan_record_aux_stack+0x8e/0xa0 [ 38.893418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.894091] remove_vma+0x139/0x170 [ 38.894567] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.895131] do_vmi_munmap+0x1f1/0x2b0 [ 38.895630] __vm_munmap+0x138/0x3a0 [ 38.896124] __x64_sys_munmap+0x59/0x80 [ 38.896635] do_syscall_64+0x3f/0x90 [ 38.897138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897801] [ 38.898017] The buggy address belongs to the object at ffff88800f2f39f8 [ 38.898017] which belongs to the cache vm_area_struct of size 168 [ 38.899543] The buggy address is located 88 bytes inside of [ 38.899543] freed 168-byte region [ffff88800f2f39f8, ffff88800f2f3aa0) [ 38.901004] [ 38.901226] The buggy address belongs to the physical page: [ 38.901918] page:00000000c0aeac4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2f3 [ 38.903038] memcg:ffff88800dbd9e01 [ 38.903472] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.904194] page_type: 0xffffffff() [ 38.904654] raw: 0100000000000200 ffff8880087a0c80 ffffea0000352d00 dead000000000007 [ 38.905629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbd9e01 [ 38.906570] page dumped because: kasan: bad access detected [ 38.907253] [ 38.907473] Memory state around the buggy address: [ 38.908073] ffff88800f2f3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.908979] ffff88800f2f3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.909882] >ffff88800f2f3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.910733] ^ [ 38.911444] ffff88800f2f3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 38.912313] ffff88800f2f3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.913201] ================================================================== [ 38.914213] Disabling lock debugging due to kernel taint [ 40.777283] BUG: Bad rss-counter state mm:00000000790206d0 type:MM_FILEPAGES val:33 [ 40.778856] BUG: Bad rss-counter state mm:00000000790206d0 type:MM_ANONPAGES val:22 [ 41.198381] BUG: Bad rss-counter state mm:0000000065273f76 type:MM_FILEPAGES val:33 [ 41.199133] BUG: Bad rss-counter state mm:0000000065273f76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49376' (ECDSA) to the list of known hosts. 2023/06/21 07:42:08 fuzzer started 2023/06/21 07:42:08 dialing manager at localhost:36067 2023/06/21 07:42:08 checking machine... 2023/06/21 07:42:08 checking revisions... [ 41.791754] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:42:08 testing simple program... [ 41.846583] cgroup: Unknown subsys name 'net' [ 41.878737] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:42:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc46071858 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=00007fb23ccb85100000564eb672f790 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=1ffffffff0ff2ed1 RBX=ffff888009ae2560 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f9768c RBP=0000000058f7e436 RSP=ffff888015ef7508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000d7a00000d7a R12=0000000000000000 R13=00000000000000ac R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab197d RFL=00000217 [----APC] 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 00007f99dfb4a900 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=00007fff6c25b000 CR3=00000000165f8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000