[ 23.879811] BUG: Bad rss-counter state mm:000000007dcc6851 type:MM_FILEPAGES val:33 [ 23.881568] BUG: Bad rss-counter state mm:000000007dcc6851 type:MM_ANONPAGES val:22 [ 24.016919] ================================================================== [ 24.017904] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.018921] Read of size 8 at addr ffff8880090905c8 by task sshd/218 [ 24.019863] [ 24.020105] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.021048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.022132] Call Trace: [ 24.022490] [ 24.022804] dump_stack_lvl+0x91/0xf0 [ 24.023355] print_report+0xcc/0x620 [ 24.023916] ? __virt_addr_valid+0x102/0x340 [ 24.024512] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.025193] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.025873] kasan_report+0xbe/0xf0 [ 24.026399] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.027085] vma_interval_tree_remove+0xc75/0xec0 [ 24.027767] vma_prepare+0xc54/0x11a0 [ 24.028302] __split_vma+0x5af/0x950 [ 24.028823] ? __pfx___split_vma+0x10/0x10 [ 24.029412] ? find_held_lock+0x2c/0x110 [ 24.029992] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.030622] ? lock_is_held_type+0x9f/0x120 [ 24.031215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.031898] ? mtree_range_walk+0x632/0x900 [ 24.032511] ? mas_walk+0x5c7/0x7c0 [ 24.033070] do_vmi_munmap+0x1f1/0x2b0 [ 24.033643] mmap_region+0x1f9/0x2660 [ 24.034279] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.035030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.036139] ? __pfx_lock_acquire+0x10/0x10 [ 24.036961] ? __pfx_mmap_region+0x10/0x10 [ 24.037770] ? security_mmap_addr+0x7d/0xa0 [ 24.038569] ? get_unmapped_area+0x1f5/0x3f0 [ 24.039413] do_mmap+0x854/0xf00 [ 24.040079] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.040802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.041549] ksys_mmap_pgoff+0x3af/0x500 [ 24.042221] do_syscall_64+0x3f/0x90 [ 24.042852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.043722] RIP: 0033:0x7f96a3d67d82 [ 24.044325] 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 [ 24.047150] RSP: 002b:00007ffe34bfb218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.048356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96a3d67d82 [ 24.049450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96a31a1000 [ 24.050567] RBP: 00007f96a31a1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.051692] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ab9a93980 [ 24.052791] R13: 00007ffe34bfb230 R14: 00007ffe34bfb260 R15: 00007ffe34bfb5c0 [ 24.053911] [ 24.054292] [ 24.054581] Allocated by task 211: [ 24.055141] kasan_save_stack+0x22/0x50 [ 24.055834] kasan_set_track+0x25/0x30 [ 24.056476] __kasan_slab_alloc+0x59/0x70 [ 24.057170] kmem_cache_alloc+0x16b/0x370 [ 24.057854] vm_area_dup+0x20/0x160 [ 24.058450] __split_vma+0x170/0x950 [ 24.059063] split_vma+0xc6/0x110 [ 24.059624] mprotect_fixup+0x8d2/0xb30 [ 24.060125] do_mprotect_pkey+0x87e/0xd40 [ 24.060642] __x64_sys_mprotect+0x78/0xc0 [ 24.061168] do_syscall_64+0x3f/0x90 [ 24.061648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.062286] [ 24.062502] Freed by task 202: [ 24.062887] kasan_save_stack+0x22/0x50 [ 24.063393] kasan_set_track+0x25/0x30 [ 24.063945] kasan_save_free_info+0x2b/0x50 [ 24.064475] __kasan_slab_free+0x10a/0x190 [ 24.065013] kmem_cache_free+0x10d/0x4d0 [ 24.065516] rcu_core+0x8c8/0x2860 [ 24.065967] __do_softirq+0x1b7/0x7d4 [ 24.066452] [ 24.066668] Last potentially related work creation: [ 24.067264] kasan_save_stack+0x22/0x50 [ 24.067778] __kasan_record_aux_stack+0x8e/0xa0 [ 24.068354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.068996] remove_vma+0x139/0x170 [ 24.069446] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.070005] do_vmi_munmap+0x1f1/0x2b0 [ 24.070490] __vm_munmap+0x138/0x3a0 [ 24.070964] __x64_sys_munmap+0x59/0x80 [ 24.071463] do_syscall_64+0x3f/0x90 [ 24.071932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.072569] [ 24.072786] The buggy address belongs to the object at ffff888009090570 [ 24.072786] which belongs to the cache vm_area_struct of size 168 [ 24.074258] The buggy address is located 88 bytes inside of [ 24.074258] freed 168-byte region [ffff888009090570, ffff888009090618) [ 24.075679] [ 24.075897] The buggy address belongs to the physical page: [ 24.076549] page:00000000ebc53833 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9090 [ 24.077618] memcg:ffff88800904db01 [ 24.078049] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.078698] page_type: 0xffffffff() [ 24.079143] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.080073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800904db01 [ 24.080978] page dumped because: kasan: bad access detected [ 24.081640] [ 24.081855] Memory state around the buggy address: [ 24.082433] ffff888009090480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.083280] ffff888009090500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.084159] >ffff888009090580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.085005] ^ [ 24.085661] ffff888009090600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.086520] ffff888009090680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.087363] ================================================================== [ 24.088342] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.876916] BUG: Bad rss-counter state mm:00000000c13cebfa type:MM_FILEPAGES val:33 [ 25.878073] BUG: Bad rss-counter state mm:00000000c13cebfa type:MM_ANONPAGES val:22 [ 26.304209] BUG: Bad rss-counter state mm:0000000099962cfc type:MM_FILEPAGES val:33 [ 26.305386] BUG: Bad rss-counter state mm:0000000099962cfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5644' (ECDSA) to the list of known hosts. 2023/06/21 07:52:01 fuzzer started 2023/06/21 07:52:01 dialing manager at localhost:36067 2023/06/21 07:52:01 checking machine... 2023/06/21 07:52:01 checking revisions... [ 27.063615] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:52:01 testing simple program... [ 27.113190] cgroup: Unknown subsys name 'net' [ 27.163575] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:52:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f622e259550 CR3=000000000c908000 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=85e0e000a8b3b3b47d457ecc52fb0d4c XMM02=000000000011b380d59e07bde36eea69 XMM03=000000000011b4a8ec2efd57dc4c00df XMM04=b376159251d74ff900000000000ae988 XMM05=ad41add1b47782990000000000132b10 XMM06=bdf2e299e47b49d50000000000131590 XMM07=fb795ef6d65770560000000000121b98 XMM08=2c67c8bc2e329bc3000000000011b4a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffb3a0125 RBX=ffffffff85d92c20 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c20 RSP=ffff888018387880 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=ffffffff85d92c20 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f1711932900 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=00007fff96891000 CR3=0000000016b66000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000