[ 31.697022] BUG: Bad rss-counter state mm:00000000a33c57c7 type:MM_FILEPAGES val:33 [ 31.698259] BUG: Bad rss-counter state mm:00000000a33c57c7 type:MM_ANONPAGES val:22 [ 31.738298] ================================================================== [ 31.739398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.740439] Read of size 8 at addr ffff88800e4b13f8 by task sshd/219 [ 31.741213] [ 31.741431] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.742313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.743313] Call Trace: [ 31.743631] [ 31.743915] dump_stack_lvl+0x91/0xf0 [ 31.744413] print_report+0xcc/0x620 [ 31.744909] ? __virt_addr_valid+0x102/0x340 [ 31.745470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.746112] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.746746] kasan_report+0xbe/0xf0 [ 31.747220] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.747843] vma_interval_tree_remove+0xc75/0xec0 [ 31.748450] vma_prepare+0xc54/0x11a0 [ 31.748932] __split_vma+0x5af/0x950 [ 31.749415] ? __pfx___split_vma+0x10/0x10 [ 31.749966] ? find_held_lock+0x2c/0x110 [ 31.750496] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.751072] ? lock_is_held_type+0x9f/0x120 [ 31.751627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.752247] ? mtree_range_walk+0x632/0x900 [ 31.752810] ? mas_walk+0x5c7/0x7c0 [ 31.753289] do_vmi_munmap+0x1f1/0x2b0 [ 31.753780] mmap_region+0x1f9/0x2660 [ 31.754274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.754794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.755512] ? __pfx_lock_acquire+0x10/0x10 [ 31.756064] ? __pfx_mmap_region+0x10/0x10 [ 31.756600] ? security_mmap_addr+0x7d/0xa0 [ 31.757142] ? get_unmapped_area+0x1f5/0x3f0 [ 31.757698] do_mmap+0x854/0xf00 [ 31.758150] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.758650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.759225] ksys_mmap_pgoff+0x3af/0x500 [ 31.759743] do_syscall_64+0x3f/0x90 [ 31.760238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.760892] RIP: 0033:0x7f628cc54d82 [ 31.761360] 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 [ 31.763550] RSP: 002b:00007ffc84ce6098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.764492] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f628cc54d82 [ 31.765372] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f628c08e000 [ 31.766261] RBP: 00007f628c08e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.767100] R10: 0000000000000812 R11: 0000000000000206 R12: 000056003523bec0 [ 31.767966] R13: 00007ffc84ce60b0 R14: 00007ffc84ce60e0 R15: 00007ffc84ce6440 [ 31.768847] [ 31.769140] [ 31.769361] Allocated by task 211: [ 31.769798] kasan_save_stack+0x22/0x50 [ 31.770320] kasan_set_track+0x25/0x30 [ 31.770817] __kasan_slab_alloc+0x59/0x70 [ 31.771343] kmem_cache_alloc+0x16b/0x370 [ 31.771866] vm_area_dup+0x20/0x160 [ 31.772328] __split_vma+0x170/0x950 [ 31.772797] split_vma+0xc6/0x110 [ 31.773247] mprotect_fixup+0x8d2/0xb30 [ 31.773755] do_mprotect_pkey+0x87e/0xd40 [ 31.774292] __x64_sys_mprotect+0x78/0xc0 [ 31.774821] do_syscall_64+0x3f/0x90 [ 31.775312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775970] [ 31.776187] Freed by task 211: [ 31.776581] kasan_save_stack+0x22/0x50 [ 31.777084] kasan_set_track+0x25/0x30 [ 31.777580] kasan_save_free_info+0x2b/0x50 [ 31.778133] __kasan_slab_free+0x10a/0x190 [ 31.778675] kmem_cache_free+0x10d/0x4d0 [ 31.779193] rcu_core+0x8c8/0x2860 [ 31.779640] __do_softirq+0x1b7/0x7d4 [ 31.780124] [ 31.780340] Last potentially related work creation: [ 31.780933] kasan_save_stack+0x22/0x50 [ 31.781446] __kasan_record_aux_stack+0x8e/0xa0 [ 31.782033] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.782684] remove_vma+0x139/0x170 [ 31.783139] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.783704] do_vmi_munmap+0x1f1/0x2b0 [ 31.784190] __vm_munmap+0x138/0x3a0 [ 31.784665] __x64_sys_munmap+0x59/0x80 [ 31.785171] do_syscall_64+0x3f/0x90 [ 31.785645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.786308] [ 31.786528] The buggy address belongs to the object at ffff88800e4b13a0 [ 31.786528] which belongs to the cache vm_area_struct of size 168 [ 31.788018] The buggy address is located 88 bytes inside of [ 31.788018] freed 168-byte region [ffff88800e4b13a0, ffff88800e4b1448) [ 31.789443] [ 31.789664] The buggy address belongs to the physical page: [ 31.790339] page:00000000dbd14bbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4b1 [ 31.791437] memcg:ffff88800dfde401 [ 31.791867] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.792577] page_type: 0xffffffff() [ 31.793036] raw: 0100000000000200 ffff88800879fc80 ffffea00005945c0 dead000000000005 [ 31.793979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfde401 [ 31.794910] page dumped because: kasan: bad access detected [ 31.795575] [ 31.795791] Memory state around the buggy address: [ 31.796377] ffff88800e4b1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.797253] ffff88800e4b1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.798132] >ffff88800e4b1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.798996] ^ [ 31.799842] ffff88800e4b1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.800708] ffff88800e4b1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.801565] ================================================================== [ 31.802562] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.467738] BUG: Bad rss-counter state mm:000000003cfc7f78 type:MM_FILEPAGES val:33 [ 33.468693] BUG: Bad rss-counter state mm:000000003cfc7f78 type:MM_ANONPAGES val:22 [ 33.945340] BUG: Bad rss-counter state mm:000000008437733e type:MM_FILEPAGES val:33 [ 33.946401] BUG: Bad rss-counter state mm:000000008437733e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9755' (ECDSA) to the list of known hosts. 2023/06/19 20:38:51 fuzzer started 2023/06/19 20:38:51 dialing manager at localhost:44161 2023/06/19 20:38:51 checking machine... 2023/06/19 20:38:51 checking revisions... [ 34.645911] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:38:52 testing simple program... [ 34.694543] cgroup: Unknown subsys name 'net' [ 34.734419] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:38:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fedea9b06d8 CR3=000000000dd22000 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=2031353a38333a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a38333a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f77a25bae07 RSP=ffff88801a2b7660 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f77a25ba000 R11=00000000000b6996 R12=ffff88801a2b7778 R13=0000000000000000 R14=ffff888016a8d1c0 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000216 [----AP-] 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 00007f77a1a28900 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=00007f77a19ed008 CR3=000000000d816000 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=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