syzkaller login: [ 32.781858] BUG: Bad rss-counter state mm:0000000051711711 type:MM_FILEPAGES val:33 [ 32.783042] BUG: Bad rss-counter state mm:0000000051711711 type:MM_ANONPAGES val:22 [ 32.990562] ================================================================== [ 32.991622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.992732] Read of size 8 at addr ffff88801a1bd310 by task sshd/221 [ 32.993774] [ 32.994030] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.995014] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.996160] Call Trace: [ 32.996552] [ 32.996873] dump_stack_lvl+0x91/0xf0 [ 32.997486] print_report+0xcc/0x620 [ 32.998130] ? __virt_addr_valid+0x102/0x340 [ 32.998754] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.999399] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.000074] kasan_report+0xbe/0xf0 [ 33.000579] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.001234] vma_interval_tree_remove+0xc75/0xec0 [ 33.001860] vma_prepare+0xc54/0x11a0 [ 33.002394] __split_vma+0x5af/0x950 [ 33.002904] ? __pfx___split_vma+0x10/0x10 [ 33.003456] ? find_held_lock+0x2c/0x110 [ 33.004009] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.004597] ? lock_is_held_type+0x9f/0x120 [ 33.005189] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.005827] ? mtree_range_walk+0x632/0x900 [ 33.006413] ? mas_walk+0x5c7/0x7c0 [ 33.006923] do_vmi_munmap+0x1f1/0x2b0 [ 33.007449] mmap_region+0x1f9/0x2660 [ 33.007970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.008530] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.009302] ? __pfx_lock_acquire+0x10/0x10 [ 33.009891] ? __pfx_mmap_region+0x10/0x10 [ 33.010479] ? security_mmap_addr+0x7d/0xa0 [ 33.011047] ? get_unmapped_area+0x1f5/0x3f0 [ 33.011642] do_mmap+0x854/0xf00 [ 33.012134] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.012668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.013262] ksys_mmap_pgoff+0x3af/0x500 [ 33.013823] do_syscall_64+0x3f/0x90 [ 33.014362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.015057] RIP: 0033:0x7fdcedb5cd82 [ 33.015556] 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 [ 33.017820] RSP: 002b:00007ffe2a02c858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.018808] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdcedb5cd82 [ 33.019723] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdcecf96000 [ 33.020641] RBP: 00007fdcecf96000 R08: 0000000000000009 R09: 0000000000001000 [ 33.021553] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a622516ec0 [ 33.022501] R13: 00007ffe2a02c870 R14: 00007ffe2a02c8a0 R15: 00007ffe2a02cc00 [ 33.023416] [ 33.023735] [ 33.023973] Allocated by task 214: [ 33.024439] kasan_save_stack+0x22/0x50 [ 33.024981] kasan_set_track+0x25/0x30 [ 33.025515] __kasan_slab_alloc+0x59/0x70 [ 33.026102] kmem_cache_alloc+0x16b/0x370 [ 33.026672] vm_area_dup+0x20/0x160 [ 33.027161] __split_vma+0x170/0x950 [ 33.027678] split_vma+0xc6/0x110 [ 33.028147] mprotect_fixup+0x8d2/0xb30 [ 33.028699] do_mprotect_pkey+0x87e/0xd40 [ 33.029267] __x64_sys_mprotect+0x78/0xc0 [ 33.029802] do_syscall_64+0x3f/0x90 [ 33.030298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.030988] [ 33.031220] Freed by task 214: [ 33.031639] kasan_save_stack+0x22/0x50 [ 33.032183] kasan_set_track+0x25/0x30 [ 33.032716] kasan_save_free_info+0x2b/0x50 [ 33.033286] __kasan_slab_free+0x10a/0x190 [ 33.033850] kmem_cache_free+0x10d/0x4d0 [ 33.034420] rcu_core+0x8c8/0x2860 [ 33.034909] __do_softirq+0x1b7/0x7d4 [ 33.035426] [ 33.035652] Last potentially related work creation: [ 33.036286] kasan_save_stack+0x22/0x50 [ 33.036840] __kasan_record_aux_stack+0x8e/0xa0 [ 33.037453] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.038145] remove_vma+0x139/0x170 [ 33.038625] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.039226] do_vmi_munmap+0x1f1/0x2b0 [ 33.039764] __vm_munmap+0x138/0x3a0 [ 33.040269] __x64_sys_munmap+0x59/0x80 [ 33.040805] do_syscall_64+0x3f/0x90 [ 33.041311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.042001] [ 33.042254] The buggy address belongs to the object at ffff88801a1bd2b8 [ 33.042254] which belongs to the cache vm_area_struct of size 168 [ 33.043826] The buggy address is located 88 bytes inside of [ 33.043826] freed 168-byte region [ffff88801a1bd2b8, ffff88801a1bd360) [ 33.045351] [ 33.045573] The buggy address belongs to the physical page: [ 33.046280] page:000000007d340fa9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1bd [ 33.047457] memcg:ffff88800efc5c01 [ 33.047900] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.048583] page_type: 0xffffffff() [ 33.049061] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.050054] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efc5c01 [ 33.051013] page dumped because: kasan: bad access detected [ 33.051713] [ 33.051933] Memory state around the buggy address: [ 33.052541] ffff88801a1bd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.053448] ffff88801a1bd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.054361] >ffff88801a1bd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.055265] ^ [ 33.055753] ffff88801a1bd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.056660] ffff88801a1bd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.057583] ================================================================== [ 33.058751] Disabling lock debugging due to kernel taint [ 34.860832] BUG: Bad rss-counter state mm:0000000066d480fa type:MM_FILEPAGES val:33 [ 34.861594] BUG: Bad rss-counter state mm:0000000066d480fa type:MM_ANONPAGES val:22 [ 35.328982] BUG: Bad rss-counter state mm:0000000030428bf0 type:MM_FILEPAGES val:33 [ 35.329960] BUG: Bad rss-counter state mm:0000000030428bf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40868' (ECDSA) to the list of known hosts. 2023/06/19 19:58:18 fuzzer started 2023/06/19 19:58:18 dialing manager at localhost:44161 2023/06/19 19:58:18 checking machine... 2023/06/19 19:58:18 checking revisions... [ 36.072677] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:58:19 testing simple program... [ 36.113815] cgroup: Unknown subsys name 'net' [ 36.168322] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9c134e RSI=ffffffff81ef1438 RDI=ffff88806ce09a70 RBP=ffff88806ce09b08 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020c48 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff8880165f9b40 R15=ffff88806ce09a70 RIP=ffffffff8113060b 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 00007ffb34e3c900 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=00007ffd616be000 CR3=000000000db4e000 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=00007f0b9a983000 CR3=0000000019ee6000 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=2038313a38353a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a38353a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000