[ 23.750136] BUG: Bad rss-counter state mm:00000000a8f2a609 type:MM_FILEPAGES val:33 [ 23.751542] BUG: Bad rss-counter state mm:00000000a8f2a609 type:MM_ANONPAGES val:22 [ 23.842016] ================================================================== [ 23.842938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.843884] Read of size 8 at addr ffff88800e7d13f8 by task sshd/219 [ 23.844663] [ 23.844969] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.845830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.846795] Call Trace: [ 23.847151] [ 23.847437] dump_stack_lvl+0x91/0xf0 [ 23.847919] print_report+0xcc/0x620 [ 23.848403] ? __virt_addr_valid+0x102/0x340 [ 23.848956] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.849583] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.850201] kasan_report+0xbe/0xf0 [ 23.850681] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.851306] vma_interval_tree_remove+0xc75/0xec0 [ 23.851923] vma_prepare+0xc54/0x11a0 [ 23.852398] __split_vma+0x5af/0x950 [ 23.852865] ? __pfx___split_vma+0x10/0x10 [ 23.853392] ? find_held_lock+0x2c/0x110 [ 23.853904] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.854464] ? lock_is_held_type+0x9f/0x120 [ 23.854999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.855624] ? mtree_range_walk+0x632/0x900 [ 23.856172] ? mas_walk+0x5c7/0x7c0 [ 23.856645] do_vmi_munmap+0x1f1/0x2b0 [ 23.857134] mmap_region+0x1f9/0x2660 [ 23.857617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.858124] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.858832] ? __pfx_lock_acquire+0x10/0x10 [ 23.859374] ? __pfx_mmap_region+0x10/0x10 [ 23.859928] ? security_mmap_addr+0x7d/0xa0 [ 23.860454] ? get_unmapped_area+0x1f5/0x3f0 [ 23.861003] do_mmap+0x854/0xf00 [ 23.861442] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.861936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.862492] ksys_mmap_pgoff+0x3af/0x500 [ 23.863003] do_syscall_64+0x3f/0x90 [ 23.863503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.864149] RIP: 0033:0x7f1d9073ad82 [ 23.864606] 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 [ 23.866706] RSP: 002b:00007ffe0bac49a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.867608] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d9073ad82 [ 23.868447] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d8fb74000 [ 23.869289] RBP: 00007f1d8fb74000 R08: 0000000000000009 R09: 0000000000001000 [ 23.870137] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620e58f3ec0 [ 23.870974] R13: 00007ffe0bac49c0 R14: 00007ffe0bac49f0 R15: 00007ffe0bac4d50 [ 23.871836] [ 23.872127] [ 23.872341] Allocated by task 212: [ 23.872772] kasan_save_stack+0x22/0x50 [ 23.873270] kasan_set_track+0x25/0x30 [ 23.873759] __kasan_slab_alloc+0x59/0x70 [ 23.874281] kmem_cache_alloc+0x16b/0x370 [ 23.874791] vm_area_dup+0x20/0x160 [ 23.875258] __split_vma+0x170/0x950 [ 23.875720] split_vma+0xc6/0x110 [ 23.876164] mprotect_fixup+0x8d2/0xb30 [ 23.876673] do_mprotect_pkey+0x87e/0xd40 [ 23.877188] __x64_sys_mprotect+0x78/0xc0 [ 23.877705] do_syscall_64+0x3f/0x90 [ 23.878177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.878814] [ 23.879027] Freed by task 212: [ 23.879423] kasan_save_stack+0x22/0x50 [ 23.879924] kasan_set_track+0x25/0x30 [ 23.880417] kasan_save_free_info+0x2b/0x50 [ 23.880957] __kasan_slab_free+0x10a/0x190 [ 23.881482] kmem_cache_free+0x10d/0x4d0 [ 23.881996] rcu_core+0x8c8/0x2860 [ 23.882438] __do_softirq+0x1b7/0x7d4 [ 23.882916] [ 23.883155] Last potentially related work creation: [ 23.883743] kasan_save_stack+0x22/0x50 [ 23.884243] __kasan_record_aux_stack+0x8e/0xa0 [ 23.884812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.885459] remove_vma+0x139/0x170 [ 23.885910] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.886467] do_vmi_munmap+0x1f1/0x2b0 [ 23.886948] __vm_munmap+0x138/0x3a0 [ 23.887417] __x64_sys_munmap+0x59/0x80 [ 23.887916] do_syscall_64+0x3f/0x90 [ 23.888392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.889036] [ 23.889250] The buggy address belongs to the object at ffff88800e7d13a0 [ 23.889250] which belongs to the cache vm_area_struct of size 168 [ 23.890712] The buggy address is located 88 bytes inside of [ 23.890712] freed 168-byte region [ffff88800e7d13a0, ffff88800e7d1448) [ 23.892110] [ 23.892326] The buggy address belongs to the physical page: [ 23.892977] page:000000001b9c973f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7d1 [ 23.894057] memcg:ffff88800edbf101 [ 23.894482] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.895142] page_type: 0xffffffff() [ 23.895592] raw: 0100000000000200 ffff8880087a0c80 ffffea000039f4c0 dead000000000006 [ 23.896514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edbf101 [ 23.897411] page dumped because: kasan: bad access detected [ 23.898065] [ 23.898279] Memory state around the buggy address: [ 23.898853] ffff88800e7d1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.899715] ffff88800e7d1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.900561] >ffff88800e7d1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.901405] ^ [ 23.902234] ffff88800e7d1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.903078] ffff88800e7d1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.903928] ================================================================== [ 23.904895] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.587693] BUG: Bad rss-counter state mm:0000000065fcbf1e type:MM_FILEPAGES val:33 [ 26.588709] BUG: Bad rss-counter state mm:0000000065fcbf1e type:MM_ANONPAGES val:22 [ 27.054084] BUG: Bad rss-counter state mm:00000000e62ac3d7 type:MM_FILEPAGES val:33 [ 27.055910] BUG: Bad rss-counter state mm:00000000e62ac3d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22702' (ECDSA) to the list of known hosts. 2023/06/20 20:23:45 fuzzer started 2023/06/20 20:23:45 dialing manager at localhost:36067 2023/06/20 20:23:45 checking machine... 2023/06/20 20:23:45 checking revisions... [ 27.707923] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:23:45 testing simple program... [ 27.750311] cgroup: Unknown subsys name 'net' [ 27.796191] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:23:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c4c3828 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff844c6912 RDI=ffff888016bd7cb0 RBP=ffff888016bd7ca8 RSP=ffff888016bd7ab0 R8 =0000000000000007 R9 =0000000000000002 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=ffffed1002d7af9c R14=ffff888016bd7ce1 R15=0000000000000000 RIP=ffffffff844c6966 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 00007feaad3ca900 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=00007feaad38f008 CR3=000000000ed70000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f0c4bb42630 CR3=000000000d7b4000 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=2035343a33323a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33323a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000