syzkaller login: [ 60.976362] BUG: Bad rss-counter state mm:000000003a3b1cb6 type:MM_FILEPAGES val:33 [ 60.977250] BUG: Bad rss-counter state mm:000000003a3b1cb6 type:MM_ANONPAGES val:22 [ 61.130082] ================================================================== [ 61.131167] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.132388] Read of size 8 at addr ffff88800d5c3df0 by task sshd/218 [ 61.133171] [ 61.133397] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.134270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.135260] Call Trace: [ 61.135580] [ 61.135869] dump_stack_lvl+0x91/0xf0 [ 61.136369] print_report+0xcc/0x620 [ 61.136856] ? __virt_addr_valid+0x102/0x340 [ 61.137412] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.138032] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.138648] kasan_report+0xbe/0xf0 [ 61.139146] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.139776] vma_interval_tree_remove+0xc75/0xec0 [ 61.140388] vma_prepare+0xc54/0x11a0 [ 61.140877] __split_vma+0x5af/0x950 [ 61.141352] ? __pfx___split_vma+0x10/0x10 [ 61.141881] ? find_held_lock+0x2c/0x110 [ 61.142410] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.142976] ? lock_is_held_type+0x9f/0x120 [ 61.143532] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.144144] ? mtree_range_walk+0x632/0x900 [ 61.144704] ? mas_walk+0x5c7/0x7c0 [ 61.145187] do_vmi_munmap+0x1f1/0x2b0 [ 61.145687] mmap_region+0x1f9/0x2660 [ 61.146174] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.146687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.147413] ? __pfx_lock_acquire+0x10/0x10 [ 61.147946] ? __pfx_mmap_region+0x10/0x10 [ 61.148479] ? security_mmap_addr+0x7d/0xa0 [ 61.149012] ? get_unmapped_area+0x1f5/0x3f0 [ 61.149559] do_mmap+0x854/0xf00 [ 61.149997] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.150489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.151054] ksys_mmap_pgoff+0x3af/0x500 [ 61.151586] do_syscall_64+0x3f/0x90 [ 61.152067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.152719] RIP: 0033:0x7f910bcd6d82 [ 61.153178] 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 [ 61.155318] RSP: 002b:00007ffc84f46b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.156233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f910bcd6d82 [ 61.157090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f910b110000 [ 61.157937] RBP: 00007f910b110000 R08: 0000000000000009 R09: 0000000000001000 [ 61.158787] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ae6ebed90 [ 61.159654] R13: 00007ffc84f46bb0 R14: 00007ffc84f46be0 R15: 00007ffc84f46f40 [ 61.160529] [ 61.160820] [ 61.161039] Allocated by task 211: [ 61.161478] kasan_save_stack+0x22/0x50 [ 61.161983] kasan_set_track+0x25/0x30 [ 61.162488] __kasan_slab_alloc+0x59/0x70 [ 61.163016] kmem_cache_alloc+0x16b/0x370 [ 61.163555] vm_area_dup+0x20/0x160 [ 61.164014] __split_vma+0x170/0x950 [ 61.164486] split_vma+0xc6/0x110 [ 61.164928] mprotect_fixup+0x8d2/0xb30 [ 61.165432] do_mprotect_pkey+0x87e/0xd40 [ 61.165955] __x64_sys_mprotect+0x78/0xc0 [ 61.166478] do_syscall_64+0x3f/0x90 [ 61.166957] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.167617] [ 61.167831] Freed by task 211: [ 61.168230] kasan_save_stack+0x22/0x50 [ 61.168736] kasan_set_track+0x25/0x30 [ 61.169230] kasan_save_free_info+0x2b/0x50 [ 61.169766] __kasan_slab_free+0x10a/0x190 [ 61.170304] kmem_cache_free+0x10d/0x4d0 [ 61.170818] rcu_core+0x8c8/0x2860 [ 61.171278] __do_softirq+0x1b7/0x7d4 [ 61.171762] [ 61.171983] Last potentially related work creation: [ 61.172647] kasan_save_stack+0x22/0x50 [ 61.173156] __kasan_record_aux_stack+0x8e/0xa0 [ 61.173728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.174368] remove_vma+0x139/0x170 [ 61.174825] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.175395] do_vmi_munmap+0x1f1/0x2b0 [ 61.175880] __vm_munmap+0x138/0x3a0 [ 61.176351] __x64_sys_munmap+0x59/0x80 [ 61.176848] do_syscall_64+0x3f/0x90 [ 61.177326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.177971] [ 61.178189] The buggy address belongs to the object at ffff88800d5c3d98 [ 61.178189] which belongs to the cache vm_area_struct of size 168 [ 61.179677] The buggy address is located 88 bytes inside of [ 61.179677] freed 168-byte region [ffff88800d5c3d98, ffff88800d5c3e40) [ 61.181077] [ 61.181294] The buggy address belongs to the physical page: [ 61.181956] page:00000000a91c3e37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5c3 [ 61.183041] memcg:ffff88800d753101 [ 61.183481] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 61.184190] page_type: 0xffffffff() [ 61.184645] raw: 0100000000000200 ffff8880087a0c80 ffffea00003963c0 dead000000000003 [ 61.185567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d753101 [ 61.186491] page dumped because: kasan: bad access detected [ 61.187184] [ 61.187402] Memory state around the buggy address: [ 61.187997] ffff88800d5c3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.188855] ffff88800d5c3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.189725] >ffff88800d5c3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 61.190575] ^ [ 61.191398] ffff88800d5c3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 61.192254] ffff88800d5c3e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.193105] ================================================================== [ 61.194031] Disabling lock debugging due to kernel taint [ 63.316655] BUG: Bad rss-counter state mm:000000001e534a63 type:MM_FILEPAGES val:33 [ 63.317842] BUG: Bad rss-counter state mm:000000001e534a63 type:MM_ANONPAGES val:22 [ 63.776187] BUG: Bad rss-counter state mm:0000000005ef7139 type:MM_FILEPAGES val:33 [ 63.777166] BUG: Bad rss-counter state mm:0000000005ef7139 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60099' (ECDSA) to the list of known hosts. 2023/06/20 17:51:05 fuzzer started 2023/06/20 17:51:05 dialing manager at localhost:36067 2023/06/20 17:51:05 checking machine... 2023/06/20 17:51:05 checking revisions... [ 64.436060] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:51:05 testing simple program... [ 64.488067] cgroup: Unknown subsys name 'net' [ 64.534804] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:51:05 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff852cabc0 RCX=ffffffff81ef5746 RDX=ffff88800f670000 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800d057cd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000dc0 R14=0000000000000010 R15=ffff8880144e8000 RIP=ffffffff814c086b 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 00007fa68d530900 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=00007ffd3d1c8000 CR3=000000000fedc000 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=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 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=00007f5f26b4f8b0 CR3=000000000d958000 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=f685fe68dd355387284e44312d4c55b0 XMM02=ec2efd57dc4c00df0000000000119e38 XMM03=61d332c4e9c8869a0000000000119f08 XMM04=93e4992bd53c6a1c00000000000ae988 XMM05=751b9502027dc0b90000000000130b88 XMM06=3a39254d4735ca63000000000012fd60 XMM07=e042d86d42eb936e0000000000120f78 XMM08=61d332c4e9c8869a0000000000119f08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000