syzkaller login: [ 31.093994] BUG: Bad rss-counter state mm:00000000105778c0 type:MM_FILEPAGES val:33 [ 31.095188] BUG: Bad rss-counter state mm:00000000105778c0 type:MM_ANONPAGES val:22 [ 31.254897] ================================================================== [ 31.255849] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.256843] Read of size 8 at addr ffff888015ce7798 by task sshd/220 [ 31.257998] [ 31.258291] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.259469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.260841] Call Trace: [ 31.261306] [ 31.261680] dump_stack_lvl+0x91/0xf0 [ 31.262230] print_report+0xcc/0x620 [ 31.262739] ? __virt_addr_valid+0x102/0x340 [ 31.263338] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263998] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264642] kasan_report+0xbe/0xf0 [ 31.265193] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265861] vma_interval_tree_remove+0xc75/0xec0 [ 31.266490] vma_prepare+0xc54/0x11a0 [ 31.267009] __split_vma+0x5af/0x950 [ 31.267501] ? __pfx___split_vma+0x10/0x10 [ 31.268076] ? find_held_lock+0x2c/0x110 [ 31.268629] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.269275] ? lock_is_held_type+0x9f/0x120 [ 31.269872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.270504] ? mtree_range_walk+0x632/0x900 [ 31.271092] ? mas_walk+0x5c7/0x7c0 [ 31.271598] do_vmi_munmap+0x1f1/0x2b0 [ 31.272135] mmap_region+0x1f9/0x2660 [ 31.272641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.273217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.273997] ? __pfx_lock_acquire+0x10/0x10 [ 31.274564] ? __pfx_mmap_region+0x10/0x10 [ 31.275130] ? security_mmap_addr+0x7d/0xa0 [ 31.275695] ? get_unmapped_area+0x1f5/0x3f0 [ 31.276283] do_mmap+0x854/0xf00 [ 31.276733] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.277310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.277929] ksys_mmap_pgoff+0x3af/0x500 [ 31.278466] do_syscall_64+0x3f/0x90 [ 31.279004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279696] RIP: 0033:0x7f5f57a2fd82 [ 31.280195] 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 [ 31.282482] RSP: 002b:00007ffc30fdb2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.283444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f57a2fd82 [ 31.284358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f56e69000 [ 31.285266] RBP: 00007f5f56e69000 R08: 0000000000000009 R09: 0000000000001000 [ 31.286177] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdfb490ec0 [ 31.287079] R13: 00007ffc30fdb2c0 R14: 00007ffc30fdb2f0 R15: 00007ffc30fdb650 [ 31.287989] [ 31.288298] [ 31.288521] Allocated by task 213: [ 31.288991] kasan_save_stack+0x22/0x50 [ 31.289548] kasan_set_track+0x25/0x30 [ 31.290096] __kasan_slab_alloc+0x59/0x70 [ 31.290648] kmem_cache_alloc+0x16b/0x370 [ 31.291195] vm_area_dup+0x20/0x160 [ 31.291667] __split_vma+0x170/0x950 [ 31.292193] split_vma+0xc6/0x110 [ 31.292660] mprotect_fixup+0x8d2/0xb30 [ 31.293234] do_mprotect_pkey+0x87e/0xd40 [ 31.293784] __x64_sys_mprotect+0x78/0xc0 [ 31.294338] do_syscall_64+0x3f/0x90 [ 31.294870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295571] [ 31.295807] Freed by task 213: [ 31.296219] kasan_save_stack+0x22/0x50 [ 31.296746] kasan_set_track+0x25/0x30 [ 31.297281] kasan_save_free_info+0x2b/0x50 [ 31.297857] __kasan_slab_free+0x10a/0x190 [ 31.298407] kmem_cache_free+0x10d/0x4d0 [ 31.298941] rcu_core+0x8c8/0x2860 [ 31.299402] __do_softirq+0x1b7/0x7d4 [ 31.299935] [ 31.300161] Last potentially related work creation: [ 31.300793] kasan_save_stack+0x22/0x50 [ 31.301355] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302637] remove_vma+0x139/0x170 [ 31.303122] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.303699] do_vmi_munmap+0x1f1/0x2b0 [ 31.304232] __vm_munmap+0x138/0x3a0 [ 31.304714] __x64_sys_munmap+0x59/0x80 [ 31.305251] do_syscall_64+0x3f/0x90 [ 31.305754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306436] [ 31.306654] The buggy address belongs to the object at ffff888015ce7740 [ 31.306654] which belongs to the cache vm_area_struct of size 168 [ 31.308211] The buggy address is located 88 bytes inside of [ 31.308211] freed 168-byte region [ffff888015ce7740, ffff888015ce77e8) [ 31.309713] [ 31.309953] The buggy address belongs to the physical page: [ 31.310650] page:00000000f2779b27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ce7 [ 31.311824] memcg:ffff888019fd6601 [ 31.312281] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.312982] page_type: 0xffffffff() [ 31.313476] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.314450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fd6601 [ 31.315432] page dumped because: kasan: bad access detected [ 31.316147] [ 31.316369] Memory state around the buggy address: [ 31.316992] ffff888015ce7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.317936] ffff888015ce7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.318864] >ffff888015ce7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.319760] ^ [ 31.320284] ffff888015ce7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.321249] ffff888015ce7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.322156] ================================================================== [ 31.323173] Disabling lock debugging due to kernel taint [ 33.319290] BUG: Bad rss-counter state mm:00000000dde162d9 type:MM_FILEPAGES val:33 [ 33.320304] BUG: Bad rss-counter state mm:00000000dde162d9 type:MM_ANONPAGES val:22 [ 33.777312] BUG: Bad rss-counter state mm:00000000580ce337 type:MM_FILEPAGES val:33 [ 33.778470] BUG: Bad rss-counter state mm:00000000580ce337 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17658' (ECDSA) to the list of known hosts. 2023/06/20 15:02:13 fuzzer started 2023/06/20 15:02:13 dialing manager at localhost:36067 2023/06/20 15:02:13 checking machine... 2023/06/20 15:02:13 checking revisions... [ 34.568176] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:02:13 testing simple program... [ 34.613325] cgroup: Unknown subsys name 'net' [ 34.661031] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:02:13 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88801009a9a0 RCX=0000000000000000 RDX=ffff888015fe51c0 RSI=ffffffff818e97e1 RDI=ffff88800fecfd98 RBP=0000000000000000 RSP=ffff88800fecfe00 R8 =0000000000000001 R9 =ffffed1001fd9fb3 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801009a940 R13=ffff88801606ed40 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff84511dca 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 00007f7ffdfb9900 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=00007f7ffe570618 CR3=000000000c566000 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=1ffffffff0bb133f RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000002 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff88806cf09990 R8 =ffffffff8608a556 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7a 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 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=00007fad27c5dbb0 CR3=000000000ca4c000 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=2033313a32303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a32303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000