syzkaller login: [ 31.800775] BUG: Bad rss-counter state mm:0000000080f5f7b8 type:MM_FILEPAGES val:33 [ 31.801850] BUG: Bad rss-counter state mm:0000000080f5f7b8 type:MM_ANONPAGES val:22 [ 31.972234] ================================================================== [ 31.973205] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.974159] Read of size 8 at addr ffff88800f0b6228 by task sshd/227 [ 31.975056] [ 31.975284] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.976184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.977243] Call Trace: [ 31.977569] [ 31.977859] dump_stack_lvl+0x91/0xf0 [ 31.978375] print_report+0xcc/0x620 [ 31.978859] ? __virt_addr_valid+0x102/0x340 [ 31.979426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.980059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.980699] kasan_report+0xbe/0xf0 [ 31.981190] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.981820] vma_interval_tree_remove+0xc75/0xec0 [ 31.982425] vma_prepare+0xc54/0x11a0 [ 31.982904] __split_vma+0x5af/0x950 [ 31.983382] ? __pfx___split_vma+0x10/0x10 [ 31.983915] ? find_held_lock+0x2c/0x110 [ 31.984440] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.985023] ? lock_is_held_type+0x9f/0x120 [ 31.985577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.986193] ? mtree_range_walk+0x632/0x900 [ 31.986748] ? mas_walk+0x5c7/0x7c0 [ 31.987228] do_vmi_munmap+0x1f1/0x2b0 [ 31.987719] mmap_region+0x1f9/0x2660 [ 31.988215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.988726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.989461] ? __pfx_lock_acquire+0x10/0x10 [ 31.989997] ? __pfx_mmap_region+0x10/0x10 [ 31.990538] ? security_mmap_addr+0x7d/0xa0 [ 31.991078] ? get_unmapped_area+0x1f5/0x3f0 [ 31.991635] do_mmap+0x854/0xf00 [ 31.992082] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.992592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.993166] ksys_mmap_pgoff+0x3af/0x500 [ 31.993681] do_syscall_64+0x3f/0x90 [ 31.994160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.994814] RIP: 0033:0x7fd3d9470d82 [ 31.995282] 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 [ 31.997435] RSP: 002b:00007ffe54021c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.998362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd3d9470d82 [ 31.999213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3d88aa000 [ 32.000082] RBP: 00007fd3d88aa000 R08: 0000000000000009 R09: 0000000000001000 [ 32.000956] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f1b340f70 [ 32.001819] R13: 00007ffe54021c40 R14: 00007ffe54021c70 R15: 00007ffe54021fd0 [ 32.002700] [ 32.002992] [ 32.003211] Allocated by task 220: [ 32.003646] kasan_save_stack+0x22/0x50 [ 32.004160] kasan_set_track+0x25/0x30 [ 32.004661] __kasan_slab_alloc+0x59/0x70 [ 32.005200] kmem_cache_alloc+0x16b/0x370 [ 32.005722] vm_area_dup+0x20/0x160 [ 32.006181] __split_vma+0x170/0x950 [ 32.006666] split_vma+0xc6/0x110 [ 32.007128] mprotect_fixup+0x8d2/0xb30 [ 32.007658] do_mprotect_pkey+0x87e/0xd40 [ 32.008201] __x64_sys_mprotect+0x78/0xc0 [ 32.008743] do_syscall_64+0x3f/0x90 [ 32.009265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.009928] [ 32.010155] Freed by task 220: [ 32.010565] kasan_save_stack+0x22/0x50 [ 32.011100] kasan_set_track+0x25/0x30 [ 32.011614] kasan_save_free_info+0x2b/0x50 [ 32.012173] __kasan_slab_free+0x10a/0x190 [ 32.012732] kmem_cache_free+0x10d/0x4d0 [ 32.013276] rcu_core+0x8c8/0x2860 [ 32.013740] __do_softirq+0x1b7/0x7d4 [ 32.014241] [ 32.014467] Last potentially related work creation: [ 32.015082] kasan_save_stack+0x22/0x50 [ 32.015610] __kasan_record_aux_stack+0x8e/0xa0 [ 32.016207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.016894] remove_vma+0x139/0x170 [ 32.017366] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.017945] do_vmi_munmap+0x1f1/0x2b0 [ 32.018447] __vm_munmap+0x138/0x3a0 [ 32.018933] __x64_sys_munmap+0x59/0x80 [ 32.019450] do_syscall_64+0x3f/0x90 [ 32.019941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.020622] [ 32.020853] Second to last potentially related work creation: [ 32.021569] kasan_save_stack+0x22/0x50 [ 32.022090] __kasan_record_aux_stack+0x8e/0xa0 [ 32.022693] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.023359] remove_vma+0x139/0x170 [ 32.023829] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.024407] do_vmi_munmap+0x1f1/0x2b0 [ 32.024918] mmap_region+0x1f9/0x2660 [ 32.025414] do_mmap+0x854/0xf00 [ 32.025862] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.026373] ksys_mmap_pgoff+0x3af/0x500 [ 32.026895] do_syscall_64+0x3f/0x90 [ 32.027396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.028067] [ 32.028290] The buggy address belongs to the object at ffff88800f0b61d0 [ 32.028290] which belongs to the cache vm_area_struct of size 168 [ 32.029841] The buggy address is located 88 bytes inside of [ 32.029841] freed 168-byte region [ffff88800f0b61d0, ffff88800f0b6278) [ 32.031307] [ 32.031530] The buggy address belongs to the physical page: [ 32.032217] page:0000000090ab90d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0b6 [ 32.033367] memcg:ffff8880097d5e01 [ 32.033809] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.034537] page_type: 0xffffffff() [ 32.035010] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 32.035966] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d5e01 [ 32.036935] page dumped because: kasan: bad access detected [ 32.037634] [ 32.037856] Memory state around the buggy address: [ 32.038464] ffff88800f0b6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.039355] ffff88800f0b6180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.040247] >ffff88800f0b6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.041148] ^ [ 32.041727] ffff88800f0b6280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.042621] ffff88800f0b6300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.043513] ================================================================== [ 32.044565] Disabling lock debugging due to kernel taint [ 34.265231] BUG: Bad rss-counter state mm:0000000048a4317c type:MM_FILEPAGES val:33 [ 34.266927] BUG: Bad rss-counter state mm:0000000048a4317c type:MM_ANONPAGES val:22 [ 34.778228] BUG: Bad rss-counter state mm:00000000d0a46662 type:MM_FILEPAGES val:33 [ 34.779130] BUG: Bad rss-counter state mm:00000000d0a46662 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18760' (ECDSA) to the list of known hosts. 2023/06/19 23:40:38 fuzzer started 2023/06/19 23:40:38 dialing manager at localhost:44161 2023/06/19 23:40:38 checking machine... 2023/06/19 23:40:38 checking revisions... [ 35.538368] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:40:38 testing simple program... [ 35.580965] cgroup: Unknown subsys name 'net' [ 35.629821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:40:37 Registers: info registers vcpu 0 RAX=ffff8880165ed200 RBX=ffff8880165ed41c RCX=0000000000000000 RDX=ffff8880166c51c0 RSI=dffffc0000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800df6fce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff8880147d5380 R14=0000000000000000 R15=00007f5f3f411fff RIP=ffffffff8449efa1 RFL=00000293 [--S-A-C] 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 00007f5f3f3dd900 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=0000557d98240704 CR3=000000001995e000 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=00000000000000000000557d97470060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000fe0 RSI=0000565472bd44d0 RDI=ffff888014534420 RBP=0000565472bd44d0 RSP=ffff88801466fd60 R8 =ffff88801466fd20 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888014534400 R13=0000000000000000 R14=ffff888014534420 R15=ffffffff85d3ce80 RIP=ffffffff8226fec4 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 00007fdd98357900 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=00007fdd977eb7b0 CR3=000000000cb10000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bd7d84314c850bb100000000000ae988 XMM05=0cbc924c558b4bc50000000000136aa8 XMM06=16bbfc4fa606b6250000000000135940 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000