syzkaller login: [ 30.665841] BUG: Bad rss-counter state mm:000000007071918f type:MM_FILEPAGES val:33 [ 30.667013] BUG: Bad rss-counter state mm:000000007071918f type:MM_ANONPAGES val:22 [ 30.710433] ================================================================== [ 30.711389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.712287] Read of size 8 at addr ffff88800d825d08 by task sshd/228 [ 30.713028] [ 30.713241] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.714091] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.715191] Call Trace: [ 30.715510] [ 30.715782] dump_stack_lvl+0x91/0xf0 [ 30.716259] print_report+0xcc/0x620 [ 30.716717] ? __virt_addr_valid+0x102/0x340 [ 30.717260] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718463] kasan_report+0xbe/0xf0 [ 30.718921] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.719524] vma_interval_tree_remove+0xc75/0xec0 [ 30.720106] vma_prepare+0xc54/0x11a0 [ 30.720572] __split_vma+0x5af/0x950 [ 30.721046] ? __pfx___split_vma+0x10/0x10 [ 30.721575] ? find_held_lock+0x2c/0x110 [ 30.722103] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.722680] ? lock_is_held_type+0x9f/0x120 [ 30.723225] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.723845] ? mtree_range_walk+0x632/0x900 [ 30.724410] ? mas_walk+0x5c7/0x7c0 [ 30.724895] do_vmi_munmap+0x1f1/0x2b0 [ 30.725383] mmap_region+0x1f9/0x2660 [ 30.725876] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.726426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.727138] ? __pfx_lock_acquire+0x10/0x10 [ 30.727683] ? __pfx_mmap_region+0x10/0x10 [ 30.728231] ? security_mmap_addr+0x7d/0xa0 [ 30.728785] ? get_unmapped_area+0x1f5/0x3f0 [ 30.729336] do_mmap+0x854/0xf00 [ 30.729787] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.730297] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.730876] ksys_mmap_pgoff+0x3af/0x500 [ 30.731388] do_syscall_64+0x3f/0x90 [ 30.731857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.732522] RIP: 0033:0x7f6712969d82 [ 30.732984] 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 [ 30.735127] RSP: 002b:00007ffe85a59a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.736044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6712969d82 [ 30.736908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6711da3000 [ 30.737772] RBP: 00007f6711da3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.738701] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc108b5980 [ 30.739615] R13: 00007ffe85a59a50 R14: 00007ffe85a59a80 R15: 00007ffe85a59de0 [ 30.740504] [ 30.740798] [ 30.741013] Allocated by task 221: [ 30.741449] kasan_save_stack+0x22/0x50 [ 30.741961] kasan_set_track+0x25/0x30 [ 30.742478] __kasan_slab_alloc+0x59/0x70 [ 30.743022] kmem_cache_alloc+0x16b/0x370 [ 30.743537] vm_area_dup+0x20/0x160 [ 30.744008] __split_vma+0x170/0x950 [ 30.744475] split_vma+0xc6/0x110 [ 30.744924] mprotect_fixup+0x8d2/0xb30 [ 30.745431] do_mprotect_pkey+0x87e/0xd40 [ 30.745963] __x64_sys_mprotect+0x78/0xc0 [ 30.746505] do_syscall_64+0x3f/0x90 [ 30.746983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747636] [ 30.747863] Freed by task 221: [ 30.748257] kasan_save_stack+0x22/0x50 [ 30.748776] kasan_set_track+0x25/0x30 [ 30.749277] kasan_save_free_info+0x2b/0x50 [ 30.749820] __kasan_slab_free+0x10a/0x190 [ 30.750401] kmem_cache_free+0x10d/0x4d0 [ 30.750921] rcu_core+0x8c8/0x2860 [ 30.751359] __do_softirq+0x1b7/0x7d4 [ 30.751847] [ 30.752068] Last potentially related work creation: [ 30.752660] kasan_save_stack+0x22/0x50 [ 30.753173] __kasan_record_aux_stack+0x8e/0xa0 [ 30.753743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.754395] remove_vma+0x139/0x170 [ 30.754855] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.755414] do_vmi_munmap+0x1f1/0x2b0 [ 30.755971] __vm_munmap+0x138/0x3a0 [ 30.756436] __x64_sys_munmap+0x59/0x80 [ 30.756929] do_syscall_64+0x3f/0x90 [ 30.757411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758063] [ 30.758301] The buggy address belongs to the object at ffff88800d825cb0 [ 30.758301] which belongs to the cache vm_area_struct of size 168 [ 30.759795] The buggy address is located 88 bytes inside of [ 30.759795] freed 168-byte region [ffff88800d825cb0, ffff88800d825d58) [ 30.761223] [ 30.761441] The buggy address belongs to the physical page: [ 30.762113] page:00000000ce06024b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd825 [ 30.763223] memcg:ffff88800dcac501 [ 30.763660] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764314] page_type: 0xffffffff() [ 30.764757] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.765677] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcac501 [ 30.766611] page dumped because: kasan: bad access detected [ 30.767270] [ 30.767491] Memory state around the buggy address: [ 30.768066] ffff88800d825c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.768947] ffff88800d825c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.769820] >ffff88800d825d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.770700] ^ [ 30.771152] ffff88800d825d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772026] ffff88800d825e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.772907] ================================================================== [ 30.773829] Disabling lock debugging due to kernel taint [ 32.592479] BUG: Bad rss-counter state mm:000000000f2b70cf type:MM_FILEPAGES val:33 [ 32.593171] BUG: Bad rss-counter state mm:000000000f2b70cf type:MM_ANONPAGES val:22 [ 32.951753] BUG: Bad rss-counter state mm:00000000f8eb04da type:MM_FILEPAGES val:33 [ 32.953192] BUG: Bad rss-counter state mm:00000000f8eb04da type:MM_ANONPAGES val:22 [ 33.018922] BUG: Bad rss-counter state mm:00000000857abeb9 type:MM_FILEPAGES val:169 [ 33.019807] BUG: Bad rss-counter state mm:00000000857abeb9 type:MM_ANONPAGES val:50 Warning: Permanently added '[localhost]:15677' (ECDSA) to the list of known hosts. 2023/06/21 00:17:01 fuzzer started 2023/06/21 00:17:01 dialing manager at localhost:36067 2023/06/21 00:17:01 checking machine... 2023/06/21 00:17:01 checking revisions... [ 33.633410] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:17:01 testing simple program... [ 33.679456] cgroup: Unknown subsys name 'net' [ 33.736641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:17:01 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801689fca8 RCX=0000000000000000 RDX=ffff88800b9d51c0 RSI=ffffffff844a5886 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88801689f990 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88801689fcb0 R14=0000000000000000 R15=ffff88801689fce1 RIP=ffffffff814c0880 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 00007ff09d01c900 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=00007ff09cfcb008 CR3=000000000e590000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f478d0c64c0 CR3=000000000c55a000 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=db4fa20994f282a0224f1c8c253ada16 XMM02=ec2efd57dc4c00df000000000011ba90 XMM03=f57833a97299cf68000000000011bb60 XMM04=f92ff719dc80640300000000000ae988 XMM05=aba7464f4f97ba0b0000000000132aa0 XMM06=94aac670ef06ff650000000000131b58 XMM07=e042d86d42eb936e00000000001223b0 XMM08=f57833a97299cf68000000000011bb60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000