Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.822720] BUG: Bad rss-counter state mm:00000000bd7f31c0 type:MM_FILEPAGES val:33 [ 30.823928] BUG: Bad rss-counter state mm:00000000bd7f31c0 type:MM_ANONPAGES val:22 [ 30.988741] ================================================================== [ 30.989733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.990858] Read of size 8 at addr ffff8880102473f8 by task sshd/219 [ 30.991701] [ 30.991928] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.992982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.994090] Call Trace: [ 30.994476] [ 30.994841] dump_stack_lvl+0x91/0xf0 [ 30.995372] print_report+0xcc/0x620 [ 30.995940] ? __virt_addr_valid+0x102/0x340 [ 30.996617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997328] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998029] kasan_report+0xbe/0xf0 [ 30.998617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999393] vma_interval_tree_remove+0xc75/0xec0 [ 31.000110] vma_prepare+0xc54/0x11a0 [ 31.000673] __split_vma+0x5af/0x950 [ 31.001176] ? __pfx___split_vma+0x10/0x10 [ 31.001712] ? find_held_lock+0x2c/0x110 [ 31.002240] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.002859] ? lock_is_held_type+0x9f/0x120 [ 31.003437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004047] ? mtree_range_walk+0x632/0x900 [ 31.004645] ? mas_walk+0x5c7/0x7c0 [ 31.005205] do_vmi_munmap+0x1f1/0x2b0 [ 31.005731] mmap_region+0x1f9/0x2660 [ 31.006251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.006882] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.007706] ? __pfx_lock_acquire+0x10/0x10 [ 31.008257] ? __pfx_mmap_region+0x10/0x10 [ 31.008859] ? security_mmap_addr+0x7d/0xa0 [ 31.009491] ? get_unmapped_area+0x1f5/0x3f0 [ 31.010149] do_mmap+0x854/0xf00 [ 31.010696] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.011290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.011924] ksys_mmap_pgoff+0x3af/0x500 [ 31.012508] do_syscall_64+0x3f/0x90 [ 31.013031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.013760] RIP: 0033:0x7faa2a3cad82 [ 31.014232] 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 [ 31.016454] RSP: 002b:00007ffd7d647788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.017364] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa2a3cad82 [ 31.018230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa29804000 [ 31.019122] RBP: 00007faa29804000 R08: 0000000000000009 R09: 0000000000001000 [ 31.020019] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561557525ec0 [ 31.020916] R13: 00007ffd7d6477a0 R14: 00007ffd7d6477d0 R15: 00007ffd7d647b30 [ 31.021863] [ 31.022222] [ 31.022494] Allocated by task 212: [ 31.023052] kasan_save_stack+0x22/0x50 [ 31.023600] kasan_set_track+0x25/0x30 [ 31.024124] __kasan_slab_alloc+0x59/0x70 [ 31.024704] kmem_cache_alloc+0x16b/0x370 [ 31.025338] vm_area_dup+0x20/0x160 [ 31.025816] __split_vma+0x170/0x950 [ 31.026307] split_vma+0xc6/0x110 [ 31.026828] mprotect_fixup+0x8d2/0xb30 [ 31.027434] do_mprotect_pkey+0x87e/0xd40 [ 31.027999] __x64_sys_mprotect+0x78/0xc0 [ 31.028551] do_syscall_64+0x3f/0x90 [ 31.029075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029867] [ 31.030083] Freed by task 212: [ 31.030548] kasan_save_stack+0x22/0x50 [ 31.031210] kasan_set_track+0x25/0x30 [ 31.031816] kasan_save_free_info+0x2b/0x50 [ 31.032420] __kasan_slab_free+0x10a/0x190 [ 31.033040] kmem_cache_free+0x10d/0x4d0 [ 31.033624] rcu_core+0x8c8/0x2860 [ 31.034113] __do_softirq+0x1b7/0x7d4 [ 31.034673] [ 31.034916] Last potentially related work creation: [ 31.035592] kasan_save_stack+0x22/0x50 [ 31.036174] __kasan_record_aux_stack+0x8e/0xa0 [ 31.036859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037640] remove_vma+0x139/0x170 [ 31.038142] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038753] do_vmi_munmap+0x1f1/0x2b0 [ 31.039255] __vm_munmap+0x138/0x3a0 [ 31.039730] __x64_sys_munmap+0x59/0x80 [ 31.040247] do_syscall_64+0x3f/0x90 [ 31.040771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041511] [ 31.041784] The buggy address belongs to the object at ffff8880102473a0 [ 31.041784] which belongs to the cache vm_area_struct of size 168 [ 31.043517] The buggy address is located 88 bytes inside of [ 31.043517] freed 168-byte region [ffff8880102473a0, ffff888010247448) [ 31.045154] [ 31.045378] The buggy address belongs to the physical page: [ 31.046045] page:00000000d0e387da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10247 [ 31.047172] memcg:ffff88800ecd2801 [ 31.047601] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.048243] page_type: 0xffffffff() [ 31.048695] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.049621] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd2801 [ 31.050528] page dumped because: kasan: bad access detected [ 31.051193] [ 31.051408] Memory state around the buggy address: [ 31.051990] ffff888010247280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.052843] ffff888010247300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.053702] >ffff888010247380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.054555] ^ [ 31.055407] ffff888010247400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.056264] ffff888010247480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.057112] ================================================================== [ 31.058144] Disabling lock debugging due to kernel taint [ 32.854264] BUG: Bad rss-counter state mm:00000000c1f87ca9 type:MM_FILEPAGES val:33 [ 32.855525] BUG: Bad rss-counter state mm:00000000c1f87ca9 type:MM_ANONPAGES val:22 [ 33.316265] BUG: Bad rss-counter state mm:000000001fa94fd1 type:MM_FILEPAGES val:33 [ 33.317393] BUG: Bad rss-counter state mm:000000001fa94fd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49659' (ECDSA) to the list of known hosts. 2023/06/20 16:49:34 fuzzer started 2023/06/20 16:49:34 dialing manager at localhost:36067 2023/06/20 16:49:34 checking machine... 2023/06/20 16:49:34 checking revisions... [ 34.096183] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:49:34 testing simple program... [ 34.166171] cgroup: Unknown subsys name 'net' [ 34.243187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:49:34 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=00007efcc76120f0 CR3=000000000da60000 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=39343a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323431 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c96405 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b202e RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff864b2030 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88800f137f58 R15=ffff88806cf09a70 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f9a7cf26900 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=00007fffe09abff8 CR3=000000000d966000 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