[ 23.718298] BUG: Bad rss-counter state mm:00000000de9d5e61 type:MM_FILEPAGES val:33 [ 23.719689] BUG: Bad rss-counter state mm:00000000de9d5e61 type:MM_ANONPAGES val:22 [ 23.816536] ================================================================== [ 23.817459] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.818409] Read of size 8 at addr ffff88800e4a9d08 by task sshd/219 [ 23.819193] [ 23.819426] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.820409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.821398] Call Trace: [ 23.821749] [ 23.822036] dump_stack_lvl+0x91/0xf0 [ 23.822531] print_report+0xcc/0x620 [ 23.823022] ? __virt_addr_valid+0x102/0x340 [ 23.823578] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.824209] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.824833] kasan_report+0xbe/0xf0 [ 23.825354] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.825984] vma_interval_tree_remove+0xc75/0xec0 [ 23.826610] vma_prepare+0xc54/0x11a0 [ 23.827108] __split_vma+0x5af/0x950 [ 23.827596] ? __pfx___split_vma+0x10/0x10 [ 23.828153] ? find_held_lock+0x2c/0x110 [ 23.828688] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.829280] ? lock_is_held_type+0x9f/0x120 [ 23.829821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.830438] ? mtree_range_walk+0x632/0x900 [ 23.831011] ? mas_walk+0x5c7/0x7c0 [ 23.831505] do_vmi_munmap+0x1f1/0x2b0 [ 23.832025] mmap_region+0x1f9/0x2660 [ 23.832511] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.833033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.833792] ? __pfx_lock_acquire+0x10/0x10 [ 23.834335] ? __pfx_mmap_region+0x10/0x10 [ 23.834891] ? security_mmap_addr+0x7d/0xa0 [ 23.835430] ? get_unmapped_area+0x1f5/0x3f0 [ 23.835999] do_mmap+0x854/0xf00 [ 23.836451] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.836963] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.837551] ksys_mmap_pgoff+0x3af/0x500 [ 23.838087] do_syscall_64+0x3f/0x90 [ 23.838576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.839251] RIP: 0033:0x7fbb5d128d82 [ 23.839716] 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 [ 23.841904] RSP: 002b:00007ffec1d16668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.842832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb5d128d82 [ 23.843704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb5c562000 [ 23.844595] RBP: 00007fbb5c562000 R08: 0000000000000009 R09: 0000000000001000 [ 23.845480] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640874f5ec0 [ 23.846345] R13: 00007ffec1d16680 R14: 00007ffec1d166b0 R15: 00007ffec1d16a10 [ 23.847234] [ 23.847525] [ 23.847747] Allocated by task 212: [ 23.848186] kasan_save_stack+0x22/0x50 [ 23.848709] kasan_set_track+0x25/0x30 [ 23.849237] __kasan_slab_alloc+0x59/0x70 [ 23.849775] kmem_cache_alloc+0x16b/0x370 [ 23.850303] vm_area_dup+0x20/0x160 [ 23.850774] __split_vma+0x170/0x950 [ 23.851264] split_vma+0xc6/0x110 [ 23.851710] mprotect_fixup+0x8d2/0xb30 [ 23.852222] do_mprotect_pkey+0x87e/0xd40 [ 23.852751] __x64_sys_mprotect+0x78/0xc0 [ 23.853307] do_syscall_64+0x3f/0x90 [ 23.853793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.854449] [ 23.854675] Freed by task 210: [ 23.855076] kasan_save_stack+0x22/0x50 [ 23.855585] kasan_set_track+0x25/0x30 [ 23.856088] kasan_save_free_info+0x2b/0x50 [ 23.856632] __kasan_slab_free+0x10a/0x190 [ 23.857200] kmem_cache_free+0x10d/0x4d0 [ 23.857716] rcu_core+0x8c8/0x2860 [ 23.858174] __do_softirq+0x1b7/0x7d4 [ 23.858658] [ 23.858884] Last potentially related work creation: [ 23.859478] kasan_save_stack+0x22/0x50 [ 23.859990] __kasan_record_aux_stack+0x8e/0xa0 [ 23.860580] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.861236] remove_vma+0x139/0x170 [ 23.861703] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.862284] do_vmi_munmap+0x1f1/0x2b0 [ 23.862772] __vm_munmap+0x138/0x3a0 [ 23.863250] __x64_sys_munmap+0x59/0x80 [ 23.863755] do_syscall_64+0x3f/0x90 [ 23.864230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.864884] [ 23.865100] Second to last potentially related work creation: [ 23.865820] kasan_save_stack+0x22/0x50 [ 23.866329] __kasan_record_aux_stack+0x8e/0xa0 [ 23.866901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.867555] remove_vma+0x139/0x170 [ 23.868012] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.868586] do_vmi_munmap+0x1f1/0x2b0 [ 23.869081] mmap_region+0x1f9/0x2660 [ 23.869589] do_mmap+0x854/0xf00 [ 23.870026] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.870528] ksys_mmap_pgoff+0x3af/0x500 [ 23.871032] do_syscall_64+0x3f/0x90 [ 23.871521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.872177] [ 23.872393] The buggy address belongs to the object at ffff88800e4a9cb0 [ 23.872393] which belongs to the cache vm_area_struct of size 168 [ 23.873903] The buggy address is located 88 bytes inside of [ 23.873903] freed 168-byte region [ffff88800e4a9cb0, ffff88800e4a9d58) [ 23.875343] [ 23.875559] The buggy address belongs to the physical page: [ 23.876245] page:00000000255c00bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4a9 [ 23.877368] memcg:ffff88800caef901 [ 23.877802] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.878506] page_type: 0xffffffff() [ 23.878964] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362740 000000000000000b [ 23.879904] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caef901 [ 23.880833] page dumped because: kasan: bad access detected [ 23.881515] [ 23.881733] Memory state around the buggy address: [ 23.882328] ffff88800e4a9c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.883206] ffff88800e4a9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.884081] >ffff88800e4a9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.884946] ^ [ 23.885408] ffff88800e4a9d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.886294] ffff88800e4a9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 23.887166] ================================================================== [ 23.888295] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.582082] BUG: Bad rss-counter state mm:00000000f1278c26 type:MM_FILEPAGES val:33 [ 25.583140] BUG: Bad rss-counter state mm:00000000f1278c26 type:MM_ANONPAGES val:22 [ 25.958215] BUG: Bad rss-counter state mm:00000000e7702ebb type:MM_FILEPAGES val:33 [ 25.958898] BUG: Bad rss-counter state mm:00000000e7702ebb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18092' (ECDSA) to the list of known hosts. 2023/06/20 17:42:30 fuzzer started 2023/06/20 17:42:30 dialing manager at localhost:36067 2023/06/20 17:42:30 checking machine... 2023/06/20 17:42:30 checking revisions... [ 26.638997] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:42:30 testing simple program... [ 26.693512] cgroup: Unknown subsys name 'net' [ 26.737037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:42:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=ffffffff844a504f RDX=ffff88800e5d1b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880101a7008 RSP=ffff888018f27ce0 R8 =0000000000000000 R9 =0000000000000002 R10=0000000000000008 R11=0000000000000000 R12=0000000000000002 R13=0000000000000008 R14=00007eff233093ec R15=00007eff232fefff RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007eff22d50900 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=00007eff233093ec CR3=000000001c632000 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=6720646572637465733a4d41503d706f 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=00007fcde102db30 CR3=0000000016680000 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=2039323a32343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a32343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000