[ 30.905401] BUG: Bad rss-counter state mm:00000000f621a7aa type:MM_FILEPAGES val:33 [ 30.906411] BUG: Bad rss-counter state mm:00000000f621a7aa type:MM_ANONPAGES val:22 [ 31.071591] ================================================================== [ 31.072466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.073365] Read of size 8 at addr ffff88801ab64d08 by task sshd/219 [ 31.074159] [ 31.074377] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.075446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.076453] Call Trace: [ 31.076778] [ 31.077065] dump_stack_lvl+0x91/0xf0 [ 31.077579] print_report+0xcc/0x620 [ 31.078068] ? __virt_addr_valid+0x102/0x340 [ 31.078630] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.079258] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.079909] kasan_report+0xbe/0xf0 [ 31.080393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081026] vma_interval_tree_remove+0xc75/0xec0 [ 31.081633] vma_prepare+0xc54/0x11a0 [ 31.082119] __split_vma+0x5af/0x950 [ 31.082611] ? __pfx___split_vma+0x10/0x10 [ 31.083159] ? find_held_lock+0x2c/0x110 [ 31.083709] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.084290] ? lock_is_held_type+0x9f/0x120 [ 31.084848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.085495] ? mtree_range_walk+0x632/0x900 [ 31.086059] ? mas_walk+0x5c7/0x7c0 [ 31.086542] do_vmi_munmap+0x1f1/0x2b0 [ 31.087040] mmap_region+0x1f9/0x2660 [ 31.087533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.088078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.088810] ? __pfx_lock_acquire+0x10/0x10 [ 31.089363] ? __pfx_mmap_region+0x10/0x10 [ 31.089903] ? security_mmap_addr+0x7d/0xa0 [ 31.090436] ? get_unmapped_area+0x1f5/0x3f0 [ 31.090999] do_mmap+0x854/0xf00 [ 31.091446] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.091981] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.092557] ksys_mmap_pgoff+0x3af/0x500 [ 31.093084] do_syscall_64+0x3f/0x90 [ 31.093571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094247] RIP: 0033:0x7f65558b6d82 [ 31.094724] 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 [ 31.096851] RSP: 002b:00007ffcce2ded58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.097745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65558b6d82 [ 31.098583] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6554cf0000 [ 31.099468] RBP: 00007f6554cf0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.100330] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578239b3d90 [ 31.101204] R13: 00007ffcce2ded70 R14: 00007ffcce2deda0 R15: 00007ffcce2df100 [ 31.102074] [ 31.102371] [ 31.102594] Allocated by task 209: [ 31.103037] kasan_save_stack+0x22/0x50 [ 31.103553] kasan_set_track+0x25/0x30 [ 31.104048] __kasan_slab_alloc+0x59/0x70 [ 31.104573] kmem_cache_alloc+0x16b/0x370 [ 31.105094] vm_area_dup+0x20/0x160 [ 31.105555] __split_vma+0x170/0x950 [ 31.106018] split_vma+0xc6/0x110 [ 31.106455] mprotect_fixup+0x8d2/0xb30 [ 31.106953] do_mprotect_pkey+0x87e/0xd40 [ 31.107490] __x64_sys_mprotect+0x78/0xc0 [ 31.108052] do_syscall_64+0x3f/0x90 [ 31.108532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109170] [ 31.109387] Freed by task 209: [ 31.109775] kasan_save_stack+0x22/0x50 [ 31.110278] kasan_set_track+0x25/0x30 [ 31.110778] kasan_save_free_info+0x2b/0x50 [ 31.111310] __kasan_slab_free+0x10a/0x190 [ 31.111850] kmem_cache_free+0x10d/0x4d0 [ 31.112349] rcu_core+0x8c8/0x2860 [ 31.112793] __do_softirq+0x1b7/0x7d4 [ 31.113265] [ 31.113478] Last potentially related work creation: [ 31.114066] kasan_save_stack+0x22/0x50 [ 31.114571] __kasan_record_aux_stack+0x8e/0xa0 [ 31.115146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.115797] remove_vma+0x139/0x170 [ 31.116310] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.116858] do_vmi_munmap+0x1f1/0x2b0 [ 31.117335] __vm_munmap+0x138/0x3a0 [ 31.117799] __x64_sys_munmap+0x59/0x80 [ 31.118287] do_syscall_64+0x3f/0x90 [ 31.118761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119392] [ 31.119604] The buggy address belongs to the object at ffff88801ab64cb0 [ 31.119604] which belongs to the cache vm_area_struct of size 168 [ 31.121079] The buggy address is located 88 bytes inside of [ 31.121079] freed 168-byte region [ffff88801ab64cb0, ffff88801ab64d58) [ 31.122474] [ 31.122696] The buggy address belongs to the physical page: [ 31.123353] page:000000002ac491b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab64 [ 31.124435] memcg:ffff88801ab01401 [ 31.124862] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.125493] page_type: 0xffffffff() [ 31.125942] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.126852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801ab01401 [ 31.127760] page dumped because: kasan: bad access detected [ 31.128415] [ 31.128628] Memory state around the buggy address: [ 31.129199] ffff88801ab64c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.130039] ffff88801ab64c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.130882] >ffff88801ab64d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.131727] ^ [ 31.132156] ffff88801ab64d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.133000] ffff88801ab64e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.133841] ================================================================== [ 31.134761] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.442286] BUG: Bad rss-counter state mm:000000002679c80b type:MM_FILEPAGES val:33 [ 33.443462] BUG: Bad rss-counter state mm:000000002679c80b type:MM_ANONPAGES val:22 [ 33.854711] BUG: Bad rss-counter state mm:0000000092a00ff3 type:MM_FILEPAGES val:33 [ 33.855754] BUG: Bad rss-counter state mm:0000000092a00ff3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60392' (ECDSA) to the list of known hosts. 2023/06/21 01:41:43 fuzzer started 2023/06/21 01:41:43 dialing manager at localhost:36067 2023/06/21 01:41:43 checking machine... 2023/06/21 01:41:43 checking revisions... [ 34.582749] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:41:43 testing simple program... [ 34.627284] cgroup: Unknown subsys name 'net' [ 34.698130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:41:43 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11001de5f98 RSP=ffff88800ef2fcb0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801628a220 R13=ffffffff818cf6e0 R14=ffff88801628a1c0 R15=0000000000480040 RIP=ffffffff812d86f2 RFL=00000247 [---Z-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 00007f1a8f57a900 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=00007f1a8fb320b0 CR3=000000000e298000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=00007fbefdcc7960 CR3=000000000d7b8000 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=32a2f9e955dab49a4442d1d15cb5b54f XMM02=ec2efd57dc4c00df000000000011aea8 XMM03=4cc582f60b1f8950000000000011af78 XMM04=e51e08e12937177600000000000ae988 XMM05=76ff0ca9ddfd089a0000000000132568 XMM06=806171799158d9670000000000131298 XMM07=e042d86d42eb936e0000000000121ad0 XMM08=4cc582f60b1f8950000000000011af78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000