syzkaller login: [ 35.927895] BUG: Bad rss-counter state mm:000000005c6f8c89 type:MM_FILEPAGES val:33 [ 35.929909] BUG: Bad rss-counter state mm:000000005c6f8c89 type:MM_ANONPAGES val:22 [ 36.105584] ================================================================== [ 36.106468] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.107363] Read of size 8 at addr ffff8880197664e0 by task sshd/221 [ 36.108119] [ 36.108328] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.109614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.110592] Call Trace: [ 36.110906] [ 36.111173] dump_stack_lvl+0x91/0xf0 [ 36.111661] print_report+0xcc/0x620 [ 36.112199] ? __virt_addr_valid+0x102/0x340 [ 36.112886] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.113641] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.114416] kasan_report+0xbe/0xf0 [ 36.115020] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.115821] vma_interval_tree_remove+0xc75/0xec0 [ 36.116573] vma_prepare+0xc54/0x11a0 [ 36.117180] __split_vma+0x5af/0x950 [ 36.117763] ? __pfx___split_vma+0x10/0x10 [ 36.118429] ? find_held_lock+0x2c/0x110 [ 36.119085] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.119805] ? lock_is_held_type+0x9f/0x120 [ 36.120482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.121198] ? mtree_range_walk+0x632/0x900 [ 36.121851] ? mas_walk+0x5c7/0x7c0 [ 36.122374] do_vmi_munmap+0x1f1/0x2b0 [ 36.122948] mmap_region+0x1f9/0x2660 [ 36.123477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.124200] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.125210] ? __pfx_lock_acquire+0x10/0x10 [ 36.125991] ? __pfx_mmap_region+0x10/0x10 [ 36.126763] ? security_mmap_addr+0x7d/0xa0 [ 36.127548] ? get_unmapped_area+0x1f5/0x3f0 [ 36.128380] do_mmap+0x854/0xf00 [ 36.128936] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.129489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.130111] ksys_mmap_pgoff+0x3af/0x500 [ 36.130601] do_syscall_64+0x3f/0x90 [ 36.131074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.131699] RIP: 0033:0x7f614819cd82 [ 36.132151] 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 [ 36.134177] RSP: 002b:00007ffe24239098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.135042] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f614819cd82 [ 36.135907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61475d6000 [ 36.136705] RBP: 00007f61475d6000 R08: 0000000000000009 R09: 0000000000001000 [ 36.137508] R10: 0000000000000812 R11: 0000000000000206 R12: 00005603102f7ec0 [ 36.138318] R13: 00007ffe242390b0 R14: 00007ffe242390e0 R15: 00007ffe24239440 [ 36.139153] [ 36.139435] [ 36.139663] Allocated by task 213: [ 36.140100] kasan_save_stack+0x22/0x50 [ 36.140609] kasan_set_track+0x25/0x30 [ 36.141118] __kasan_slab_alloc+0x59/0x70 [ 36.141634] kmem_cache_alloc+0x16b/0x370 [ 36.142162] vm_area_dup+0x20/0x160 [ 36.142619] __split_vma+0x170/0x950 [ 36.143111] split_vma+0xc6/0x110 [ 36.143541] mprotect_fixup+0x8d2/0xb30 [ 36.144075] do_mprotect_pkey+0x87e/0xd40 [ 36.144596] __x64_sys_mprotect+0x78/0xc0 [ 36.145122] do_syscall_64+0x3f/0x90 [ 36.145595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.146249] [ 36.146459] Freed by task 213: [ 36.146867] kasan_save_stack+0x22/0x50 [ 36.147361] kasan_set_track+0x25/0x30 [ 36.147892] kasan_save_free_info+0x2b/0x50 [ 36.148418] __kasan_slab_free+0x10a/0x190 [ 36.148967] kmem_cache_free+0x10d/0x4d0 [ 36.149482] rcu_core+0x8c8/0x2860 [ 36.149986] __do_softirq+0x1b7/0x7d4 [ 36.150612] [ 36.150836] Last potentially related work creation: [ 36.151413] kasan_save_stack+0x22/0x50 [ 36.151955] __kasan_record_aux_stack+0x8e/0xa0 [ 36.152528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.153183] remove_vma+0x139/0x170 [ 36.153640] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.154230] do_vmi_munmap+0x1f1/0x2b0 [ 36.154712] __vm_munmap+0x138/0x3a0 [ 36.155194] __x64_sys_munmap+0x59/0x80 [ 36.155705] do_syscall_64+0x3f/0x90 [ 36.156202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.156850] [ 36.157069] The buggy address belongs to the object at ffff888019766488 [ 36.157069] which belongs to the cache vm_area_struct of size 168 [ 36.158539] The buggy address is located 88 bytes inside of [ 36.158539] freed 168-byte region [ffff888019766488, ffff888019766530) [ 36.160006] [ 36.160224] The buggy address belongs to the physical page: [ 36.160906] page:000000006d472110 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19766 [ 36.162007] memcg:ffff88800962a501 [ 36.162439] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.163169] page_type: 0xffffffff() [ 36.163633] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 36.164559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800962a501 [ 36.165474] page dumped because: kasan: bad access detected [ 36.166146] [ 36.166359] Memory state around the buggy address: [ 36.166953] ffff888019766380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.167833] ffff888019766400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.168693] >ffff888019766480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.169559] ^ [ 36.170339] ffff888019766500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 36.171205] ffff888019766580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.172091] ================================================================== [ 36.173067] Disabling lock debugging due to kernel taint [ 38.163331] BUG: Bad rss-counter state mm:0000000053873558 type:MM_FILEPAGES val:33 [ 38.164565] BUG: Bad rss-counter state mm:0000000053873558 type:MM_ANONPAGES val:22 [ 38.671000] BUG: Bad rss-counter state mm:0000000069bdab4c type:MM_FILEPAGES val:33 [ 38.672240] BUG: Bad rss-counter state mm:0000000069bdab4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52552' (ECDSA) to the list of known hosts. 2023/06/20 03:35:56 fuzzer started 2023/06/20 03:35:56 dialing manager at localhost:44161 2023/06/20 03:35:56 checking machine... 2023/06/20 03:35:56 checking revisions... [ 39.387686] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:35:56 testing simple program... [ 39.447766] cgroup: Unknown subsys name 'net' [ 39.481622] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85830200 RCX=0000000000000000 RDX=1ffffffff0b06040 RSI=0000000000000001 RDI=ffff888017cecac4 RBP=0000000000000001 RSP=ffff88800c4a7d50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff888017ceb680 R14=000000000000000c R15=0000000000000000 RIP=ffffffff82245267 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 00007fccebff4900 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=00007fccec5ab618 CR3=000000000c6f6000 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=00007fa16430bd30 CR3=000000000c4b6000 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=be7a1c5f74d76e961f4221704286cc69 XMM02=000000000011cc20ec2efd57dc4c00df XMM03=0000000000124160744842ab74000618 XMM04=90b594961304411400000000000ae988 XMM05=e4cb8bb95a7664b60000000000133cd0 XMM06=2a8e9e61d5c810630000000000132b38 XMM07=e042d86d42eb936e00000000001243e0 XMM08=744842ab74000618000000000011cc80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000