syzkaller login: [ 81.397804] BUG: Bad rss-counter state mm:000000008dce8883 type:MM_FILEPAGES val:33 [ 81.399213] BUG: Bad rss-counter state mm:000000008dce8883 type:MM_ANONPAGES val:22 [ 81.540974] ================================================================== [ 81.542070] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 81.543389] Read of size 8 at addr ffff88800fdefb38 by task sshd/220 [ 81.544134] [ 81.544326] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 81.545085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 81.545959] Call Trace: [ 81.546237] [ 81.546487] dump_stack_lvl+0x91/0xf0 [ 81.546918] print_report+0xcc/0x620 [ 81.547358] ? __virt_addr_valid+0x102/0x340 [ 81.547849] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.548395] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.548984] kasan_report+0xbe/0xf0 [ 81.549416] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.549960] vma_interval_tree_remove+0xc75/0xec0 [ 81.550486] vma_prepare+0xc54/0x11a0 [ 81.550918] __split_vma+0x5af/0x950 [ 81.551346] ? __pfx___split_vma+0x10/0x10 [ 81.551823] ? find_held_lock+0x2c/0x110 [ 81.552289] do_vmi_align_munmap+0x2ba/0x11f0 [ 81.552789] ? lock_is_held_type+0x9f/0x120 [ 81.553263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 81.553821] ? mtree_range_walk+0x632/0x900 [ 81.554309] ? mas_walk+0x5c7/0x7c0 [ 81.554732] do_vmi_munmap+0x1f1/0x2b0 [ 81.555183] mmap_region+0x1f9/0x2660 [ 81.555611] ? vm_mmap_pgoff+0x15c/0x3a0 [ 81.556067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 81.556694] ? __pfx_lock_acquire+0x10/0x10 [ 81.557161] ? __pfx_mmap_region+0x10/0x10 [ 81.557632] ? security_mmap_addr+0x7d/0xa0 [ 81.558108] ? get_unmapped_area+0x1f5/0x3f0 [ 81.558601] do_mmap+0x854/0xf00 [ 81.559007] vm_mmap_pgoff+0x1a6/0x3a0 [ 81.559449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 81.559956] ksys_mmap_pgoff+0x3af/0x500 [ 81.560405] do_syscall_64+0x3f/0x90 [ 81.560831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.561406] RIP: 0033:0x7f1d181cbd82 [ 81.561817] 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 [ 81.563757] RSP: 002b:00007ffeb9b3e8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 81.564567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d181cbd82 [ 81.565332] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d17605000 [ 81.566113] RBP: 00007f1d17605000 R08: 0000000000000009 R09: 0000000000001000 [ 81.566885] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8f716bec0 [ 81.567660] R13: 00007ffeb9b3e8e0 R14: 00007ffeb9b3e910 R15: 00007ffeb9b3ec70 [ 81.568427] [ 81.568690] [ 81.568887] Allocated by task 213: [ 81.569270] kasan_save_stack+0x22/0x50 [ 81.569732] kasan_set_track+0x25/0x30 [ 81.570182] __kasan_slab_alloc+0x59/0x70 [ 81.570663] kmem_cache_alloc+0x16b/0x370 [ 81.571139] vm_area_dup+0x20/0x160 [ 81.571548] __split_vma+0x170/0x950 [ 81.571962] split_vma+0xc6/0x110 [ 81.572351] mprotect_fixup+0x8d2/0xb30 [ 81.572812] do_mprotect_pkey+0x87e/0xd40 [ 81.573279] __x64_sys_mprotect+0x78/0xc0 [ 81.573751] do_syscall_64+0x3f/0x90 [ 81.574207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.574809] [ 81.575022] Freed by task 203: [ 81.575379] kasan_save_stack+0x22/0x50 [ 81.575852] kasan_set_track+0x25/0x30 [ 81.576312] kasan_save_free_info+0x2b/0x50 [ 81.576796] __kasan_slab_free+0x10a/0x190 [ 81.577274] kmem_cache_free+0x10d/0x4d0 [ 81.577745] rcu_core+0x8c8/0x2860 [ 81.578143] __do_softirq+0x1b7/0x7d4 [ 81.578561] [ 81.578753] Last potentially related work creation: [ 81.579290] kasan_save_stack+0x22/0x50 [ 81.579742] __kasan_record_aux_stack+0x8e/0xa0 [ 81.580254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 81.580825] remove_vma+0x139/0x170 [ 81.581222] do_vmi_align_munmap+0xd4a/0x11f0 [ 81.581722] do_vmi_munmap+0x1f1/0x2b0 [ 81.582154] __vm_munmap+0x138/0x3a0 [ 81.582567] __x64_sys_munmap+0x59/0x80 [ 81.583020] do_syscall_64+0x3f/0x90 [ 81.583441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.584011] [ 81.584200] The buggy address belongs to the object at ffff88800fdefae0 [ 81.584200] which belongs to the cache vm_area_struct of size 168 [ 81.585495] The buggy address is located 88 bytes inside of [ 81.585495] freed 168-byte region [ffff88800fdefae0, ffff88800fdefb88) [ 81.586736] [ 81.586935] The buggy address belongs to the physical page: [ 81.587519] page:000000001141a0c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdef [ 81.588480] memcg:ffff88801a0b1d01 [ 81.588860] flags: 0x100000000000200(slab|node=0|zone=1) [ 81.589424] page_type: 0xffffffff() [ 81.589825] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 81.590672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0b1d01 [ 81.591502] page dumped because: kasan: bad access detected [ 81.592082] [ 81.592273] Memory state around the buggy address: [ 81.592796] ffff88800fdefa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 81.593552] ffff88800fdefa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 81.594327] >ffff88800fdefb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.595101] ^ [ 81.595652] ffff88800fdefb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 81.596417] ffff88800fdefc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 81.597187] ================================================================== [ 81.598425] Disabling lock debugging due to kernel taint [ 83.287383] BUG: Bad rss-counter state mm:000000003d4fe88e type:MM_FILEPAGES val:33 [ 83.288248] BUG: Bad rss-counter state mm:000000003d4fe88e type:MM_ANONPAGES val:22 [ 83.697762] BUG: Bad rss-counter state mm:00000000376c409b type:MM_FILEPAGES val:33 [ 83.698520] BUG: Bad rss-counter state mm:00000000376c409b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19580' (ECDSA) to the list of known hosts. 2023/06/19 10:58:22 fuzzer started 2023/06/19 10:58:22 dialing manager at localhost:44161 2023/06/19 10:58:22 checking machine... 2023/06/19 10:58:22 checking revisions... [ 84.386040] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:58:22 testing simple program... [ 84.437129] cgroup: Unknown subsys name 'net' [ 84.476291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad6d0 RCX=ffff88800e79f6e8 RDX=1ffff11001cf3ed4 RSI=ffff88800e79f6e0 RDI=ffffffff813ad6d0 RBP=ffff88800e79f6a0 RSP=ffff88800e79f618 R8 =0000000000000001 R9 =ffff88800e79f688 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800e79f710 R13=0000000000000000 R14=ffff88800c491b40 R15=0000000000092cc0 RIP=ffffffff811fc7a0 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 00007f9189719900 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=00007ffd545ca000 CR3=000000000effc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007f1cbe930260 CR3=000000000d84a000 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=bae0ef3a398405a0f848843f3e5ee3a1 XMM02=ec2efd57dc4c00df000000000011d1a8 XMM03=367eb3c6925a9e9a000000000011d278 XMM04=e964765ae9e0dbf700000000000ae988 XMM05=19e9129bd510f2350000000000134258 XMM06=5524134fab35054b00000000001330c0 XMM07=e042d86d42eb936e00000000001249e0 XMM08=367eb3c6925a9e9a000000000011d278 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000