[ 23.974924] BUG: Bad rss-counter state mm:00000000a5de6a5d type:MM_FILEPAGES val:33 [ 23.976141] BUG: Bad rss-counter state mm:00000000a5de6a5d type:MM_ANONPAGES val:22 [ 24.121405] ================================================================== [ 24.122446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.123379] Read of size 8 at addr ffff88801ab89140 by task sshd/219 [ 24.124257] [ 24.124477] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.125337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.126333] Call Trace: [ 24.126653] [ 24.126938] dump_stack_lvl+0x91/0xf0 [ 24.127432] print_report+0xcc/0x620 [ 24.127919] ? __virt_addr_valid+0x102/0x340 [ 24.128478] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.129124] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.129776] kasan_report+0xbe/0xf0 [ 24.130262] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.130901] vma_interval_tree_remove+0xc75/0xec0 [ 24.131531] vma_prepare+0xc54/0x11a0 [ 24.132006] __split_vma+0x5af/0x950 [ 24.132474] ? __pfx___split_vma+0x10/0x10 [ 24.133008] ? find_held_lock+0x2c/0x110 [ 24.133549] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.134117] ? lock_is_held_type+0x9f/0x120 [ 24.134659] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.135282] ? mtree_range_walk+0x632/0x900 [ 24.135830] ? mas_walk+0x5c7/0x7c0 [ 24.136291] do_vmi_munmap+0x1f1/0x2b0 [ 24.136782] mmap_region+0x1f9/0x2660 [ 24.137258] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.137758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.138428] ? __pfx_lock_acquire+0x10/0x10 [ 24.138927] ? __pfx_mmap_region+0x10/0x10 [ 24.139428] ? security_mmap_addr+0x7d/0xa0 [ 24.139929] ? get_unmapped_area+0x1f5/0x3f0 [ 24.140451] do_mmap+0x854/0xf00 [ 24.140866] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.141330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.141865] ksys_mmap_pgoff+0x3af/0x500 [ 24.142351] do_syscall_64+0x3f/0x90 [ 24.142805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.143410] RIP: 0033:0x7f5abb5c1d82 [ 24.143839] 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 [ 24.145931] RSP: 002b:00007fff958b7ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.146868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5abb5c1d82 [ 24.147754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5aba9fb000 [ 24.148623] RBP: 00007f5aba9fb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.149492] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564962d44ec0 [ 24.150343] R13: 00007fff958b7b00 R14: 00007fff958b7b30 R15: 00007fff958b7e90 [ 24.151226] [ 24.151521] [ 24.151736] Allocated by task 209: [ 24.152169] kasan_save_stack+0x22/0x50 [ 24.152679] kasan_set_track+0x25/0x30 [ 24.153190] __kasan_slab_alloc+0x59/0x70 [ 24.153731] kmem_cache_alloc+0x16b/0x370 [ 24.154255] vm_area_dup+0x20/0x160 [ 24.154715] __split_vma+0x170/0x950 [ 24.155194] split_vma+0xc6/0x110 [ 24.155633] mprotect_fixup+0x8d2/0xb30 [ 24.156139] do_mprotect_pkey+0x87e/0xd40 [ 24.156667] __x64_sys_mprotect+0x78/0xc0 [ 24.157216] do_syscall_64+0x3f/0x90 [ 24.157720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.158372] [ 24.158597] Freed by task 19: [ 24.158998] kasan_save_stack+0x22/0x50 [ 24.159521] kasan_set_track+0x25/0x30 [ 24.160031] kasan_save_free_info+0x2b/0x50 [ 24.160603] __kasan_slab_free+0x10a/0x190 [ 24.161156] kmem_cache_free+0x10d/0x4d0 [ 24.161696] rcu_core+0x8c8/0x2860 [ 24.162168] __do_softirq+0x1b7/0x7d4 [ 24.162652] [ 24.162872] Last potentially related work creation: [ 24.163459] kasan_save_stack+0x22/0x50 [ 24.163962] __kasan_record_aux_stack+0x8e/0xa0 [ 24.164547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.165188] remove_vma+0x139/0x170 [ 24.165681] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.166263] do_vmi_munmap+0x1f1/0x2b0 [ 24.166777] __vm_munmap+0x138/0x3a0 [ 24.167246] __x64_sys_munmap+0x59/0x80 [ 24.167744] do_syscall_64+0x3f/0x90 [ 24.168223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.168867] [ 24.169084] The buggy address belongs to the object at ffff88801ab890e8 [ 24.169084] which belongs to the cache vm_area_struct of size 168 [ 24.170639] The buggy address is located 88 bytes inside of [ 24.170639] freed 168-byte region [ffff88801ab890e8, ffff88801ab89190) [ 24.172059] [ 24.172278] The buggy address belongs to the physical page: [ 24.172947] page:000000000d7e7535 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab89 [ 24.174079] memcg:ffff88801ab0da01 [ 24.174519] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.175182] page_type: 0xffffffff() [ 24.175630] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.176553] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab0da01 [ 24.177470] page dumped because: kasan: bad access detected [ 24.178143] [ 24.178358] Memory state around the buggy address: [ 24.178943] ffff88801ab89000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.179790] ffff88801ab89080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.180665] >ffff88801ab89100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.181531] ^ [ 24.182164] ffff88801ab89180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.183022] ffff88801ab89200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.183889] ================================================================== [ 24.184887] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.454740] BUG: Bad rss-counter state mm:00000000e6a12ed1 type:MM_FILEPAGES val:33 [ 26.455952] BUG: Bad rss-counter state mm:00000000e6a12ed1 type:MM_ANONPAGES val:22 [ 26.984258] BUG: Bad rss-counter state mm:0000000059d4a729 type:MM_FILEPAGES val:33 [ 26.985406] BUG: Bad rss-counter state mm:0000000059d4a729 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52100' (ECDSA) to the list of known hosts. 2023/06/20 11:44:16 fuzzer started 2023/06/20 11:44:16 dialing manager at localhost:36067 2023/06/20 11:44:16 checking machine... 2023/06/20 11:44:16 checking revisions... [ 27.633568] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:44:16 testing simple program... [ 27.684184] cgroup: Unknown subsys name 'net' [ 27.722820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:44:16 Registers: info registers vcpu 0 RAX=ffff88800d8bb3a0 RBX=ffff88800d8bb000 RCX=ffffed10028f6f78 RDX=0000000000000000 RSI=0000000000000201 RDI=ffffffff8386f494 RBP=ffff88800d8bb3a0 RSP=ffff8880147b7c80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000001 R14=ffff88800d8bb6b8 R15=ffff88800d8bb3a0 RIP=ffffffff8118c9a4 RFL=00000286 [--S--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 00007fbab2b39900 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=00007fbab30f0618 CR3=0000000019ef0000 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=563412feff00545000000000000080fe 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=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=00007f7129d82640 CR3=000000000c94c000 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=02c21021c1412f9cbd486781c727cc8a XMM02=000000000011b3f8ec2efd57dc4c00df XMM03=00000000001209a0e0d36575b7e241fd XMM04=5552f23c195fb99400000000000ae988 XMM05=dfcdbad4f1609c370000000000131520 XMM06=5cae4e9c4b3bfaa50000000000130428 XMM07=e042d86d42eb936e00000000001210a0 XMM08=e0d36575b7e241fd000000000011b458 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000