syzkaller login: [ 36.239384] BUG: Bad rss-counter state mm:00000000a64dd64b type:MM_FILEPAGES val:33 [ 36.241249] BUG: Bad rss-counter state mm:00000000a64dd64b type:MM_ANONPAGES val:22 [ 36.399987] ================================================================== [ 36.400919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.401869] Read of size 8 at addr ffff88800d670a50 by task sshd/221 [ 36.402818] [ 36.403038] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.403885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.404861] Call Trace: [ 36.405192] [ 36.405478] dump_stack_lvl+0x91/0xf0 [ 36.405978] print_report+0xcc/0x620 [ 36.406456] ? __virt_addr_valid+0x102/0x340 [ 36.407008] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.407622] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.408235] kasan_report+0xbe/0xf0 [ 36.408716] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.409335] vma_interval_tree_remove+0xc75/0xec0 [ 36.409960] vma_prepare+0xc54/0x11a0 [ 36.410435] __split_vma+0x5af/0x950 [ 36.410905] ? __pfx___split_vma+0x10/0x10 [ 36.411433] ? find_held_lock+0x2c/0x110 [ 36.411955] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.412516] ? lock_is_held_type+0x9f/0x120 [ 36.413054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.413666] ? mtree_range_walk+0x632/0x900 [ 36.414216] ? mas_walk+0x5c7/0x7c0 [ 36.414683] do_vmi_munmap+0x1f1/0x2b0 [ 36.415178] mmap_region+0x1f9/0x2660 [ 36.415661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.416166] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.416885] ? __pfx_lock_acquire+0x10/0x10 [ 36.417412] ? __pfx_mmap_region+0x10/0x10 [ 36.417940] ? security_mmap_addr+0x7d/0xa0 [ 36.418471] ? get_unmapped_area+0x1f5/0x3f0 [ 36.419014] do_mmap+0x854/0xf00 [ 36.419450] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.419938] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.420508] ksys_mmap_pgoff+0x3af/0x500 [ 36.421012] do_syscall_64+0x3f/0x90 [ 36.421486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.422142] RIP: 0033:0x7f79620f4d82 [ 36.422593] 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 [ 36.424711] RSP: 002b:00007ffe450fc888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.425600] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79620f4d82 [ 36.426468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f796152e000 [ 36.427306] RBP: 00007f796152e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.428147] R10: 0000000000000812 R11: 0000000000000206 R12: 000055931e0aeec0 [ 36.428996] R13: 00007ffe450fc8a0 R14: 00007ffe450fc8d0 R15: 00007ffe450fcc30 [ 36.429857] [ 36.430160] [ 36.430375] Allocated by task 214: [ 36.430806] kasan_save_stack+0x22/0x50 [ 36.431313] kasan_set_track+0x25/0x30 [ 36.431802] __kasan_slab_alloc+0x59/0x70 [ 36.432324] kmem_cache_alloc+0x16b/0x370 [ 36.432841] vm_area_dup+0x20/0x160 [ 36.433289] __split_vma+0x170/0x950 [ 36.433769] split_vma+0xc6/0x110 [ 36.434211] mprotect_fixup+0x8d2/0xb30 [ 36.434716] do_mprotect_pkey+0x87e/0xd40 [ 36.435235] __x64_sys_mprotect+0x78/0xc0 [ 36.435753] do_syscall_64+0x3f/0x90 [ 36.436225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.436869] [ 36.437088] Freed by task 214: [ 36.437480] kasan_save_stack+0x22/0x50 [ 36.437988] kasan_set_track+0x25/0x30 [ 36.438480] kasan_save_free_info+0x2b/0x50 [ 36.439006] __kasan_slab_free+0x10a/0x190 [ 36.439538] kmem_cache_free+0x10d/0x4d0 [ 36.440044] rcu_core+0x8c8/0x2860 [ 36.440490] __do_softirq+0x1b7/0x7d4 [ 36.440965] [ 36.441180] Last potentially related work creation: [ 36.441784] kasan_save_stack+0x22/0x50 [ 36.442298] __kasan_record_aux_stack+0x8e/0xa0 [ 36.442869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.443520] remove_vma+0x139/0x170 [ 36.444109] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.444664] do_vmi_munmap+0x1f1/0x2b0 [ 36.445153] __vm_munmap+0x138/0x3a0 [ 36.445623] __x64_sys_munmap+0x59/0x80 [ 36.446144] do_syscall_64+0x3f/0x90 [ 36.446623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.447263] [ 36.447477] The buggy address belongs to the object at ffff88800d6709f8 [ 36.447477] which belongs to the cache vm_area_struct of size 168 [ 36.448940] The buggy address is located 88 bytes inside of [ 36.448940] freed 168-byte region [ffff88800d6709f8, ffff88800d670aa0) [ 36.450369] [ 36.450582] The buggy address belongs to the physical page: [ 36.451239] page:00000000b551fa98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd670 [ 36.452327] memcg:ffff88800e1e8a01 [ 36.452751] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.453451] page_type: 0xffffffff() [ 36.453919] raw: 0100000000000200 ffff88800879fc80 ffffea000035f400 dead000000000005 [ 36.454837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1e8a01 [ 36.455752] page dumped because: kasan: bad access detected [ 36.456410] [ 36.456625] Memory state around the buggy address: [ 36.457199] ffff88800d670900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.458065] ffff88800d670980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.458921] >ffff88800d670a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.459779] ^ [ 36.460487] ffff88800d670a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.461346] ffff88800d670b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.462202] ================================================================== [ 36.463164] Disabling lock debugging due to kernel taint [ 39.267851] BUG: Bad rss-counter state mm:00000000cd7fff1d type:MM_FILEPAGES val:33 [ 39.269019] BUG: Bad rss-counter state mm:00000000cd7fff1d type:MM_ANONPAGES val:22 [ 39.745416] BUG: Bad rss-counter state mm:00000000cc76ce45 type:MM_FILEPAGES val:33 [ 39.746687] BUG: Bad rss-counter state mm:00000000cc76ce45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25307' (ECDSA) to the list of known hosts. 2023/06/19 15:01:37 fuzzer started 2023/06/19 15:01:37 dialing manager at localhost:44161 2023/06/19 15:01:37 checking machine... 2023/06/19 15:01:37 checking revisions... [ 40.420163] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:01:37 testing simple program... [ 40.467970] cgroup: Unknown subsys name 'net' [ 40.515384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:01:32 Registers: info registers vcpu 0 RAX=1ffffffff0bf45ee RBX=ffffffff85fa2f74 RCX=ffffffff83634c3f RDX=0000000000000000 RSI=ffffffff863b0d30 RDI=ffffffff85fa2f6c RBP=ffffffff85fa2f6c RSP=ffff88800f1978f0 R8 =ffffffff863b0d30 R9 =ffff88800f1979e8 R10=0000000000038001 R11=000000000008a6e6 R12=ffffffff85fa2f7c R13=ffffffff85fa2f6c R14=ffffffff85fa2f6c R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f7f8b0c1900 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=00007f7f8b678618 CR3=00000000168e0000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0c7490dc90 CR3=000000000c4cc000 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=469170f6a68622a821450b6ddba660ce XMM02=ec2efd57dc4c00df000000000011e738 XMM03=dd0b7a9f4a5ff4fb000000000011e808 XMM04=8db1646514ccdcea00000000000ae988 XMM05=e4cb8bb95a7664b60000000000135058 XMM06=ceddeedcc038b7790000000000133ec0 XMM07=e042d86d42eb936e00000000001257d0 XMM08=dd0b7a9f4a5ff4fb000000000011e808 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000