syzkaller login: [ 37.870250] BUG: Bad rss-counter state mm:000000002bc44b84 type:MM_FILEPAGES val:33 [ 37.871302] BUG: Bad rss-counter state mm:000000002bc44b84 type:MM_ANONPAGES val:22 [ 38.035861] ================================================================== [ 38.036787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.037718] Read of size 8 at addr ffff88800d46d228 by task sshd/220 [ 38.038622] [ 38.038852] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.039709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.040693] Call Trace: [ 38.041013] [ 38.041304] dump_stack_lvl+0x91/0xf0 [ 38.041794] print_report+0xcc/0x620 [ 38.042281] ? __virt_addr_valid+0x102/0x340 [ 38.042856] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.043472] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.044093] kasan_report+0xbe/0xf0 [ 38.044566] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.045183] vma_interval_tree_remove+0xc75/0xec0 [ 38.045777] vma_prepare+0xc54/0x11a0 [ 38.046253] __split_vma+0x5af/0x950 [ 38.046736] ? __pfx___split_vma+0x10/0x10 [ 38.047265] ? find_held_lock+0x2c/0x110 [ 38.047786] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.048355] ? lock_is_held_type+0x9f/0x120 [ 38.048890] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.049493] ? mtree_range_walk+0x632/0x900 [ 38.050040] ? mas_walk+0x5c7/0x7c0 [ 38.050513] do_vmi_munmap+0x1f1/0x2b0 [ 38.051009] mmap_region+0x1f9/0x2660 [ 38.051487] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.051997] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.052714] ? __pfx_lock_acquire+0x10/0x10 [ 38.053246] ? __pfx_mmap_region+0x10/0x10 [ 38.053777] ? security_mmap_addr+0x7d/0xa0 [ 38.054303] ? get_unmapped_area+0x1f5/0x3f0 [ 38.054865] do_mmap+0x854/0xf00 [ 38.055305] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.055799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.056364] ksys_mmap_pgoff+0x3af/0x500 [ 38.056867] do_syscall_64+0x3f/0x90 [ 38.057351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.057996] RIP: 0033:0x7fa02caaed82 [ 38.058449] 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 [ 38.060585] RSP: 002b:00007ffefb436c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.061484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa02caaed82 [ 38.062331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa02bee8000 [ 38.063189] RBP: 00007fa02bee8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.064055] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2bf2edec0 [ 38.064902] R13: 00007ffefb436c70 R14: 00007ffefb436ca0 R15: 00007ffefb437000 [ 38.065761] [ 38.066056] [ 38.066268] Allocated by task 213: [ 38.066717] kasan_save_stack+0x22/0x50 [ 38.067227] kasan_set_track+0x25/0x30 [ 38.067718] __kasan_slab_alloc+0x59/0x70 [ 38.068246] kmem_cache_alloc+0x16b/0x370 [ 38.068758] vm_area_dup+0x20/0x160 [ 38.069209] __split_vma+0x170/0x950 [ 38.069674] split_vma+0xc6/0x110 [ 38.070114] mprotect_fixup+0x8d2/0xb30 [ 38.070618] do_mprotect_pkey+0x87e/0xd40 [ 38.071148] __x64_sys_mprotect+0x78/0xc0 [ 38.071669] do_syscall_64+0x3f/0x90 [ 38.072138] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.072776] [ 38.072993] Freed by task 19: [ 38.073381] kasan_save_stack+0x22/0x50 [ 38.073884] kasan_set_track+0x25/0x30 [ 38.074375] kasan_save_free_info+0x2b/0x50 [ 38.074914] __kasan_slab_free+0x10a/0x190 [ 38.075472] kmem_cache_free+0x10d/0x4d0 [ 38.076000] rcu_core+0x8c8/0x2860 [ 38.076456] __do_softirq+0x1b7/0x7d4 [ 38.076943] [ 38.077164] Last potentially related work creation: [ 38.077758] kasan_save_stack+0x22/0x50 [ 38.078260] __kasan_record_aux_stack+0x8e/0xa0 [ 38.078844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.079555] remove_vma+0x139/0x170 [ 38.080009] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.080566] do_vmi_munmap+0x1f1/0x2b0 [ 38.081057] __vm_munmap+0x138/0x3a0 [ 38.081527] __x64_sys_munmap+0x59/0x80 [ 38.082032] do_syscall_64+0x3f/0x90 [ 38.082514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.083184] [ 38.083400] The buggy address belongs to the object at ffff88800d46d1d0 [ 38.083400] which belongs to the cache vm_area_struct of size 168 [ 38.084884] The buggy address is located 88 bytes inside of [ 38.084884] freed 168-byte region [ffff88800d46d1d0, ffff88800d46d278) [ 38.086278] [ 38.086495] The buggy address belongs to the physical page: [ 38.087175] page:00000000c74d4918 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd46d [ 38.088254] memcg:ffff88800de90301 [ 38.088680] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.089327] page_type: 0xffffffff() [ 38.089778] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.090700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de90301 [ 38.091613] page dumped because: kasan: bad access detected [ 38.092265] [ 38.092493] Memory state around the buggy address: [ 38.093073] ffff88800d46d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.093942] ffff88800d46d180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.094834] >ffff88800d46d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.095695] ^ [ 38.096260] ffff88800d46d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.097134] ffff88800d46d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.097988] ================================================================== [ 38.098943] Disabling lock debugging due to kernel taint [ 40.047955] BUG: Bad rss-counter state mm:000000001e755cd3 type:MM_FILEPAGES val:33 [ 40.049020] BUG: Bad rss-counter state mm:000000001e755cd3 type:MM_ANONPAGES val:22 [ 40.541909] BUG: Bad rss-counter state mm:000000008981336c type:MM_FILEPAGES val:33 [ 40.542916] BUG: Bad rss-counter state mm:000000008981336c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16419' (ECDSA) to the list of known hosts. 2023/06/19 14:01:24 fuzzer started 2023/06/19 14:01:24 dialing manager at localhost:44161 2023/06/19 14:01:24 checking machine... 2023/06/19 14:01:24 checking revisions... [ 41.248457] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:01:24 testing simple program... [ 41.293921] cgroup: Unknown subsys name 'net' [ 41.349870] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:01:17 Registers: info registers vcpu 0 RAX=ffff888014777880 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028eeea6 RSI=ffffffff8180b1a1 RDI=ffff8880147774e8 RBP=ffff888014777540 RSP=ffff888014777478 R8 =0000000000000001 R9 =ffff888014777528 R10=0000000000038001 R11=0000000000020dae R12=ffff8880147775b0 R13=ffff888014777530 R14=ffff88800d9a9b40 R15=ffff8880147774e8 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 00007fd4ee254700 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=00007f54c02d50b0 CR3=0000000016f28000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033323a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323932 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=ffff88806cf09aa0 RSI=ffff88806cf09a68 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a68 R15=ffff88806cf09a98 RIP=ffffffff81131cda RFL=00000202 [-------] 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=00007f39c2cdfad0 CR3=0000000016f28000 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=2033323a31303a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a31303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000