[ 23.468277] BUG: Bad rss-counter state mm:000000009dd29fdd type:MM_FILEPAGES val:33 [ 23.468807] BUG: Bad rss-counter state mm:000000009dd29fdd type:MM_ANONPAGES val:22 [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty6. [ 23.566196] ================================================================== [ 23.566879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.567597] Read of size 8 at addr ffff8880181f74e0 by task sshd/216 [ 23.568193] [ 23.568358] CPU: 1 PID: 216 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.569027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.569773] Call Trace: [ 23.570020] [ 23.570237] dump_stack_lvl+0x91/0xf0 [ 23.570614] print_report+0xcc/0x620 [ 23.570984] ? __virt_addr_valid+0x102/0x340 [ 23.571409] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.571890] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.572391] kasan_report+0xbe/0xf0 [ 23.572760] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.573173] vma_interval_tree_remove+0xc75/0xec0 [ 23.573502] vma_prepare+0xc54/0x11a0 [ 23.573762] __split_vma+0x5af/0x950 [ 23.574020] ? __pfx___split_vma+0x10/0x10 [ 23.574306] ? find_held_lock+0x2c/0x110 [ 23.574591] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.574899] ? lock_is_held_type+0x9f/0x120 [ 23.575214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.575567] ? mtree_range_walk+0x632/0x900 [ 23.575877] ? mas_walk+0x5c7/0x7c0 [ 23.576152] do_vmi_munmap+0x1f1/0x2b0 [ 23.576433] mmap_region+0x1f9/0x2660 [ 23.576709] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.576994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.577403] ? __pfx_lock_acquire+0x10/0x10 [ 23.577710] ? __pfx_mmap_region+0x10/0x10 [ 23.578012] ? security_mmap_addr+0x7d/0xa0 [ 23.578335] ? get_unmapped_area+0x1f5/0x3f0 [ 23.578657] do_mmap+0x854/0xf00 [ 23.578908] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.579186] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.579502] ksys_mmap_pgoff+0x3af/0x500 [ 23.579784] do_syscall_64+0x3f/0x90 [ 23.580066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.580425] RIP: 0033:0x7fd0942f0d82 [ 23.580683] 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 [ 23.581858] RSP: 002b:00007ffe86a58758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.582401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0942f0d82 [ 23.582907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd09372a000 [ 23.583394] RBP: 00007fd09372a000 R08: 0000000000000009 R09: 0000000000001000 [ 23.583865] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b78056eec0 [ 23.584334] R13: 00007ffe86a58770 R14: 00007ffe86a587a0 R15: 00007ffe86a58b00 [ 23.584807] [ 23.584970] [ 23.585099] Allocated by task 205: [ 23.585336] kasan_save_stack+0x22/0x50 [ 23.585618] kasan_set_track+0x25/0x30 [ 23.585898] __kasan_slab_alloc+0x59/0x70 [ 23.586200] kmem_cache_alloc+0x16b/0x370 [ 23.586495] vm_area_dup+0x20/0x160 [ 23.586760] __split_vma+0x170/0x950 [ 23.587040] split_vma+0xc6/0x110 [ 23.587286] mprotect_fixup+0x8d2/0xb30 [ 23.587560] do_mprotect_pkey+0x87e/0xd40 [ 23.587853] __x64_sys_mprotect+0x78/0xc0 [ 23.588160] do_syscall_64+0x3f/0x90 [ 23.588420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.588773] [ 23.588893] Freed by task 205: [ 23.589113] kasan_save_stack+0x22/0x50 [ 23.589391] kasan_set_track+0x25/0x30 [ 23.589664] kasan_save_free_info+0x2b/0x50 [ 23.589959] __kasan_slab_free+0x10a/0x190 [ 23.590271] kmem_cache_free+0x10d/0x4d0 [ 23.590572] rcu_core+0x8c8/0x2860 [ 23.590837] __do_softirq+0x1b7/0x7d4 [ 23.591119] [ 23.591239] Last potentially related work creation: [ 23.591555] kasan_save_stack+0x22/0x50 [ 23.591828] __kasan_record_aux_stack+0x8e/0xa0 [ 23.592152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.592510] remove_vma+0x139/0x170 [ 23.592756] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.593063] do_vmi_munmap+0x1f1/0x2b0 [ 23.593330] __vm_munmap+0x138/0x3a0 [ 23.593586] __x64_sys_munmap+0x59/0x80 [ 23.593861] do_syscall_64+0x3f/0x90 [ 23.594120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.594508] [ 23.594635] The buggy address belongs to the object at ffff8880181f7488 [ 23.594635] which belongs to the cache vm_area_struct of size 168 [ 23.595467] The buggy address is located 88 bytes inside of [ 23.595467] freed 168-byte region [ffff8880181f7488, ffff8880181f7530) [ 23.596256] [ 23.596378] The buggy address belongs to the physical page: [ 23.596739] page:00000000ea27488b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181f7 [ 23.597340] memcg:ffff8880181e0401 [ 23.597572] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.597923] page_type: 0xffffffff() [ 23.598183] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.598755] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880181e0401 [ 23.599274] page dumped because: kasan: bad access detected [ 23.599632] [ 23.599748] Memory state around the buggy address: [ 23.600079] ffff8880181f7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.600554] ffff8880181f7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.601025] >ffff8880181f7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.601496] ^ [ 23.601905] ffff8880181f7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.602411] ffff8880181f7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.602934] ================================================================== [ 23.603517] Disabling lock debugging due to kernel taint [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Finished Update UTMP about System Runlevel Changes. Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.762416] BUG: Bad rss-counter state mm:000000007f95fc7b type:MM_FILEPAGES val:33 [ 25.763472] BUG: Bad rss-counter state mm:000000007f95fc7b type:MM_ANONPAGES val:22 [ 26.214824] BUG: Bad rss-counter state mm:000000005b6e60a4 type:MM_FILEPAGES val:33 [ 26.215812] BUG: Bad rss-counter state mm:000000005b6e60a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59136' (ECDSA) to the list of known hosts. 2023/06/20 16:20:16 fuzzer started 2023/06/20 16:20:17 dialing manager at localhost:36067 2023/06/20 16:20:17 checking machine... 2023/06/20 16:20:17 checking revisions... [ 26.846883] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:20:17 testing simple program... [ 26.910219] cgroup: Unknown subsys name 'net' [ 26.960807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:20:16 Registers: info registers vcpu 0 RAX=0000000092c3d9a3 RBX=00000000aa3dd9c3 RCX=ffff888016ca7b38 RDX=000000000000000c RSI=0000000000000012 RDI=0000000027c8f982 RBP=ffffffff81ef10be RSP=ffff888016ca7ab8 R8 =0000000023125e99 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888016ca7b20 R15=000000000000000c RIP=ffffffff82270472 RFL=00000a87 [-OS--PC] 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 00007fd8790a0900 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=00007fffda990000 CR3=000000001a120000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007f0b833e8280 CR3=0000000016a10000 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=2036313a30323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a30323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000