[ 39.262871] BUG: Bad rss-counter state mm:00000000b8e06915 type:MM_FILEPAGES val:33 [ 39.263885] BUG: Bad rss-counter state mm:00000000b8e06915 type:MM_ANONPAGES val:22 [ 39.365765] ================================================================== [ 39.366841] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.367940] Read of size 8 at addr ffff88800f024df0 by task sshd/219 [ 39.368928] [ 39.369152] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.370025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.371023] Call Trace: [ 39.371345] <TASK> [ 39.371638] dump_stack_lvl+0x91/0xf0 [ 39.372136] print_report+0xcc/0x620 [ 39.372629] ? __virt_addr_valid+0x102/0x340 [ 39.373188] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.373818] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.374438] kasan_report+0xbe/0xf0 [ 39.374922] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.375571] vma_interval_tree_remove+0xc75/0xec0 [ 39.376197] vma_prepare+0xc54/0x11a0 [ 39.376698] __split_vma+0x5af/0x950 [ 39.377193] ? __pfx___split_vma+0x10/0x10 [ 39.377765] ? find_held_lock+0x2c/0x110 [ 39.378309] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.378896] ? lock_is_held_type+0x9f/0x120 [ 39.379462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.380093] ? mtree_range_walk+0x632/0x900 [ 39.380670] ? mas_walk+0x5c7/0x7c0 [ 39.381165] do_vmi_munmap+0x1f1/0x2b0 [ 39.381687] mmap_region+0x1f9/0x2660 [ 39.382190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.382723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.383468] ? __pfx_lock_acquire+0x10/0x10 [ 39.384025] ? __pfx_mmap_region+0x10/0x10 [ 39.384580] ? security_mmap_addr+0x7d/0xa0 [ 39.385131] ? get_unmapped_area+0x1f5/0x3f0 [ 39.385734] do_mmap+0x854/0xf00 [ 39.386221] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.386762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.387364] ksys_mmap_pgoff+0x3af/0x500 [ 39.387905] do_syscall_64+0x3f/0x90 [ 39.388428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.389122] RIP: 0033:0x7fbd1a743d82 [ 39.389616] 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 [ 39.391908] RSP: 002b:00007ffedf4e96c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.392871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd1a743d82 [ 39.393811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd19b7d000 [ 39.394713] RBP: 00007fbd19b7d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.395638] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596ba5baec0 [ 39.396577] R13: 00007ffedf4e96e0 R14: 00007ffedf4e9710 R15: 00007ffedf4e9a70 [ 39.397525] </TASK> [ 39.397872] [ 39.398105] Allocated by task 212: [ 39.398586] kasan_save_stack+0x22/0x50 [ 39.399147] kasan_set_track+0x25/0x30 [ 39.399694] __kasan_slab_alloc+0x59/0x70 [ 39.400275] kmem_cache_alloc+0x16b/0x370 [ 39.400850] vm_area_dup+0x20/0x160 [ 39.401351] __split_vma+0x170/0x950 [ 39.401868] split_vma+0xc6/0x110 [ 39.402351] mprotect_fixup+0x8d2/0xb30 [ 39.402910] do_mprotect_pkey+0x87e/0xd40 [ 39.403479] __x64_sys_mprotect+0x78/0xc0 [ 39.404049] do_syscall_64+0x3f/0x90 [ 39.404568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.405274] [ 39.405510] Freed by task 203: [ 39.405966] kasan_save_stack+0x22/0x50 [ 39.406520] kasan_set_track+0x25/0x30 [ 39.407065] kasan_save_free_info+0x2b/0x50 [ 39.407650] __kasan_slab_free+0x10a/0x190 [ 39.408238] kmem_cache_free+0x10d/0x4d0 [ 39.408795] rcu_core+0x8c8/0x2860 [ 39.409289] __do_softirq+0x1b7/0x7d4 [ 39.409822] [ 39.410061] Last potentially related work creation: [ 39.410704] kasan_save_stack+0x22/0x50 [ 39.411259] __kasan_record_aux_stack+0x8e/0xa0 [ 39.411890] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.412598] remove_vma+0x139/0x170 [ 39.413086] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.413708] do_vmi_munmap+0x1f1/0x2b0 [ 39.414246] __vm_munmap+0x138/0x3a0 [ 39.414764] __x64_sys_munmap+0x59/0x80 [ 39.415304] do_syscall_64+0x3f/0x90 [ 39.415822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.416527] [ 39.416763] The buggy address belongs to the object at ffff88800f024d98 [ 39.416763] which belongs to the cache vm_area_struct of size 168 [ 39.418392] The buggy address is located 88 bytes inside of [ 39.418392] freed 168-byte region [ffff88800f024d98, ffff88800f024e40) [ 39.419943] [ 39.420183] The buggy address belongs to the physical page: [ 39.420915] page:00000000bfe8e810 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf024 [ 39.422115] memcg:ffff88800e28a701 [ 39.422586] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.423296] page_type: 0xffffffff() [ 39.423789] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.424800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28a701 [ 39.425825] page dumped because: kasan: bad access detected [ 39.426555] [ 39.426793] Memory state around the buggy address: [ 39.427441] ffff88800f024c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.428385] ffff88800f024d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.429330] >ffff88800f024d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.430281] ^ [ 39.431175] ffff88800f024e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.432117] ffff88800f024e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.433058] ================================================================== [ 39.434215] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.407717] BUG: Bad rss-counter state mm:00000000475b640d type:MM_FILEPAGES val:33 [ 41.408914] BUG: Bad rss-counter state mm:00000000475b640d type:MM_ANONPAGES val:22 [ 41.813473] BUG: Bad rss-counter state mm:0000000026f3106a type:MM_FILEPAGES val:33 [ 41.814492] BUG: Bad rss-counter state mm:0000000026f3106a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42041' (ECDSA) to the list of known hosts. 2023/06/19 13:28:41 fuzzer started 2023/06/19 13:28:42 dialing manager at localhost:44161 2023/06/19 13:28:42 checking machine... 2023/06/19 13:28:42 checking revisions... [ 42.522231] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:28:42 testing simple program... [ 42.567847] cgroup: Unknown subsys name 'net' [ 42.635373] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:28:26 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=00007faaac9c3020 CR3=000000000d43a000 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=821303fccb7a248b9042489486315e76 XMM02=ec2efd57dc4c00df000000000011c3b8 XMM03=888f7590719cbc21000000000011c488 XMM04=02a78817a55634cb00000000000ae988 XMM05=dfcdbad4f1609c370000000000132b48 XMM06=faedeb3ae9b1ead500000000001315b8 XMM07=e042d86d42eb936e00000000001234c8 XMM08=888f7590719cbc21000000000011c488 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff888008e27dc8 RDI=ffff88806cf09aa0 RBP=ffff888008e27dc8 RSP=ffff88806cf099f0 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=00000000000000a8 R13=ffff88806cf09ae0 R14=ffff888008e27dc8 R15=ffff88806cf09a98 RIP=ffffffff81130445 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 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=00007fcede79a0b0 CR3=000000000e46c000 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=2031343a38323a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a38323a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000