syzkaller login: [ 31.095049] BUG: Bad rss-counter state mm:000000009479b524 type:MM_FILEPAGES val:33 [ 31.096432] BUG: Bad rss-counter state mm:000000009479b524 type:MM_ANONPAGES val:22 [ 31.262030] ================================================================== [ 31.263195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264202] Read of size 8 at addr ffff88800dbe16b0 by task sshd/220 [ 31.265056] [ 31.265288] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.266209] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.267271] Call Trace: [ 31.267616] [ 31.267924] dump_stack_lvl+0x91/0xf0 [ 31.268474] print_report+0xcc/0x620 [ 31.268997] ? __virt_addr_valid+0x102/0x340 [ 31.269599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270264] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270924] kasan_report+0xbe/0xf0 [ 31.271441] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272113] vma_interval_tree_remove+0xc75/0xec0 [ 31.272779] vma_prepare+0xc54/0x11a0 [ 31.273298] __split_vma+0x5af/0x950 [ 31.273813] ? __pfx___split_vma+0x10/0x10 [ 31.274382] ? find_held_lock+0x2c/0x110 [ 31.274947] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.275553] ? lock_is_held_type+0x9f/0x120 [ 31.276133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.276803] ? mtree_range_walk+0x632/0x900 [ 31.277407] ? mas_walk+0x5c7/0x7c0 [ 31.277923] do_vmi_munmap+0x1f1/0x2b0 [ 31.278455] mmap_region+0x1f9/0x2660 [ 31.278974] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.279519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.280288] ? __pfx_lock_acquire+0x10/0x10 [ 31.280882] ? __pfx_mmap_region+0x10/0x10 [ 31.281448] ? security_mmap_addr+0x7d/0xa0 [ 31.282018] ? get_unmapped_area+0x1f5/0x3f0 [ 31.282605] do_mmap+0x854/0xf00 [ 31.283079] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.283609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.284212] ksys_mmap_pgoff+0x3af/0x500 [ 31.284774] do_syscall_64+0x3f/0x90 [ 31.285288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285986] RIP: 0033:0x7f6bb6bbfd82 [ 31.286482] 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 [ 31.288766] RSP: 002b:00007ffe5f639278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.289736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bb6bbfd82 [ 31.290651] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bb5ff9000 [ 31.291584] RBP: 00007f6bb5ff9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.292514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc4d6b6ec0 [ 31.293426] R13: 00007ffe5f639290 R14: 00007ffe5f6392c0 R15: 00007ffe5f639620 [ 31.294345] [ 31.294664] [ 31.294896] Allocated by task 213: [ 31.295358] kasan_save_stack+0x22/0x50 [ 31.295906] kasan_set_track+0x25/0x30 [ 31.296448] __kasan_slab_alloc+0x59/0x70 [ 31.297012] kmem_cache_alloc+0x16b/0x370 [ 31.297570] vm_area_dup+0x20/0x160 [ 31.298058] __split_vma+0x170/0x950 [ 31.298549] split_vma+0xc6/0x110 [ 31.299024] mprotect_fixup+0x8d2/0xb30 [ 31.299564] do_mprotect_pkey+0x87e/0xd40 [ 31.300128] __x64_sys_mprotect+0x78/0xc0 [ 31.300695] do_syscall_64+0x3f/0x90 [ 31.301205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301895] [ 31.302126] Freed by task 213: [ 31.302554] kasan_save_stack+0x22/0x50 [ 31.303094] kasan_set_track+0x25/0x30 [ 31.303693] kasan_save_free_info+0x2b/0x50 [ 31.304265] __kasan_slab_free+0x10a/0x190 [ 31.304856] kmem_cache_free+0x10d/0x4d0 [ 31.305406] rcu_core+0x8c8/0x2860 [ 31.305886] __do_softirq+0x1b7/0x7d4 [ 31.306401] [ 31.306630] Last potentially related work creation: [ 31.307265] kasan_save_stack+0x22/0x50 [ 31.307805] __kasan_record_aux_stack+0x8e/0xa0 [ 31.308441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309134] remove_vma+0x139/0x170 [ 31.309617] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.310213] do_vmi_munmap+0x1f1/0x2b0 [ 31.310739] __vm_munmap+0x138/0x3a0 [ 31.311241] __x64_sys_munmap+0x59/0x80 [ 31.311773] do_syscall_64+0x3f/0x90 [ 31.312293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313003] [ 31.313235] The buggy address belongs to the object at ffff88800dbe1658 [ 31.313235] which belongs to the cache vm_area_struct of size 168 [ 31.314812] The buggy address is located 88 bytes inside of [ 31.314812] freed 168-byte region [ffff88800dbe1658, ffff88800dbe1700) [ 31.316328] [ 31.316573] The buggy address belongs to the physical page: [ 31.317279] page:0000000092a5e7cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbe1 [ 31.318442] memcg:ffff88801681cd01 [ 31.318897] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.319586] page_type: 0xffffffff() [ 31.320071] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.321064] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801681cd01 [ 31.322045] page dumped because: kasan: bad access detected [ 31.322758] [ 31.322991] Memory state around the buggy address: [ 31.323609] ffff88800dbe1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.324541] ffff88800dbe1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.325466] >ffff88800dbe1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.326383] ^ [ 31.327009] ffff88800dbe1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.327922] ffff88800dbe1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.328846] ================================================================== [ 31.330057] Disabling lock debugging due to kernel taint [ 33.607887] BUG: Bad rss-counter state mm:000000006db02aa3 type:MM_FILEPAGES val:33 [ 33.609056] BUG: Bad rss-counter state mm:000000006db02aa3 type:MM_ANONPAGES val:22 [ 33.966635] BUG: Bad rss-counter state mm:00000000b8ec5468 type:MM_FILEPAGES val:33 [ 33.968126] BUG: Bad rss-counter state mm:00000000b8ec5468 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48390' (ECDSA) to the list of known hosts. 2023/06/20 14:19:58 fuzzer started 2023/06/20 14:19:59 dialing manager at localhost:36067 2023/06/20 14:19:59 checking machine... 2023/06/20 14:19:59 checking revisions... [ 34.699145] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:19:59 testing simple program... [ 34.761971] cgroup: Unknown subsys name 'net' [ 34.813438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:19:58 Registers: info registers vcpu 0 RAX=000000003f2ca026 RBX=000000009bf04f7b RCX=ffff88800d697a3c RDX=0000000000000010 RSI=0000000000000011 RDI=00000000fb0c62fd RBP=ffff88800844f780 RSP=ffff88800d697998 R8 =00000000e10b026a R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092c40 R14=ffff88800d697a00 R15=0000000000000010 RIP=ffffffff82270457 RFL=00000297 [--S-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 00007f1fe7b95900 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=00007ffd3789b000 CR3=000000001c700000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007fb10e0bbcb0 CR3=000000000d640000 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=511b1d6f48921983324cc7f8d9e96e4f XMM02=000000000011fd58ec2efd57dc4c00df XMM03=0000000000122de874b9f88adc14a951 XMM04=bb47af32abb15bd600000000000ae988 XMM05=19e9129bd510f2350000000000132c50 XMM06=aafc88df4a7ec5d70000000000131ab8 XMM07=e042d86d42eb936e0000000000123068 XMM08=74b9f88adc14a951000000000011fdb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000