[ 25.574538] BUG: Bad rss-counter state mm:00000000b1132447 type:MM_FILEPAGES val:33 [ 25.575584] BUG: Bad rss-counter state mm:00000000b1132447 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.736744] ================================================================== [ 25.737836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.738950] Read of size 8 at addr ffff8880165dd880 by task sshd/220 [ 25.740079] [ 25.740307] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.741186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.742180] Call Trace: [ 25.742503] [ 25.742794] dump_stack_lvl+0x91/0xf0 [ 25.743278] print_report+0xcc/0x620 [ 25.743778] ? __virt_addr_valid+0x102/0x340 [ 25.744330] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.744948] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.745579] kasan_report+0xbe/0xf0 [ 25.746068] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.746690] vma_interval_tree_remove+0xc75/0xec0 [ 25.747292] vma_prepare+0xc54/0x11a0 [ 25.747781] __split_vma+0x5af/0x950 [ 25.748258] ? __pfx___split_vma+0x10/0x10 [ 25.748783] ? find_held_lock+0x2c/0x110 [ 25.749313] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.749880] ? lock_is_held_type+0x9f/0x120 [ 25.750420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.751025] ? mtree_range_walk+0x632/0x900 [ 25.751605] ? mas_walk+0x5c7/0x7c0 [ 25.752078] do_vmi_munmap+0x1f1/0x2b0 [ 25.752575] mmap_region+0x1f9/0x2660 [ 25.753061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.753574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.754291] ? __pfx_lock_acquire+0x10/0x10 [ 25.754828] ? __pfx_mmap_region+0x10/0x10 [ 25.755370] ? security_mmap_addr+0x7d/0xa0 [ 25.755916] ? get_unmapped_area+0x1f5/0x3f0 [ 25.756473] do_mmap+0x854/0xf00 [ 25.756920] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.757425] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.757988] ksys_mmap_pgoff+0x3af/0x500 [ 25.758493] do_syscall_64+0x3f/0x90 [ 25.758978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.759638] RIP: 0033:0x7f7844d12d82 [ 25.760099] 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 [ 25.762252] RSP: 002b:00007fff82266398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.763158] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7844d12d82 [ 25.764032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f784414c000 [ 25.764874] RBP: 00007f784414c000 R08: 0000000000000009 R09: 0000000000001000 [ 25.765723] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563675a8fec0 [ 25.766578] R13: 00007fff822663b0 R14: 00007fff822663e0 R15: 00007fff82266740 [ 25.767444] [ 25.767735] [ 25.767954] Allocated by task 213: [ 25.768385] kasan_save_stack+0x22/0x50 [ 25.768897] kasan_set_track+0x25/0x30 [ 25.769393] __kasan_slab_alloc+0x59/0x70 [ 25.769919] kmem_cache_alloc+0x16b/0x370 [ 25.770447] vm_area_dup+0x20/0x160 [ 25.770913] __split_vma+0x170/0x950 [ 25.771403] split_vma+0xc6/0x110 [ 25.771840] mprotect_fixup+0x8d2/0xb30 [ 25.772346] do_mprotect_pkey+0x87e/0xd40 [ 25.772867] __x64_sys_mprotect+0x78/0xc0 [ 25.773393] do_syscall_64+0x3f/0x90 [ 25.773864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.774505] [ 25.774723] Freed by task 19: [ 25.775101] kasan_save_stack+0x22/0x50 [ 25.775646] kasan_set_track+0x25/0x30 [ 25.776140] kasan_save_free_info+0x2b/0x50 [ 25.776676] __kasan_slab_free+0x10a/0x190 [ 25.777214] kmem_cache_free+0x10d/0x4d0 [ 25.777733] rcu_core+0x8c8/0x2860 [ 25.778183] __do_softirq+0x1b7/0x7d4 [ 25.778691] [ 25.778907] Last potentially related work creation: [ 25.779510] kasan_save_stack+0x22/0x50 [ 25.780015] __kasan_record_aux_stack+0x8e/0xa0 [ 25.780589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.781309] remove_vma+0x139/0x170 [ 25.781769] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.782328] do_vmi_munmap+0x1f1/0x2b0 [ 25.782819] __vm_munmap+0x138/0x3a0 [ 25.783288] __x64_sys_munmap+0x59/0x80 [ 25.783807] do_syscall_64+0x3f/0x90 [ 25.784279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.784920] [ 25.785134] The buggy address belongs to the object at ffff8880165dd828 [ 25.785134] which belongs to the cache vm_area_struct of size 168 [ 25.786595] The buggy address is located 88 bytes inside of [ 25.786595] freed 168-byte region [ffff8880165dd828, ffff8880165dd8d0) [ 25.788035] [ 25.788249] The buggy address belongs to the physical page: [ 25.788904] page:00000000ec89937c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165dd [ 25.789988] memcg:ffff888015ac1b01 [ 25.790412] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.791062] page_type: 0xffffffff() [ 25.791528] raw: 0100000000000200 ffff88800879fc80 ffffea0000380c80 dead000000000006 [ 25.792441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ac1b01 [ 25.793346] page dumped because: kasan: bad access detected [ 25.794007] [ 25.794228] Memory state around the buggy address: [ 25.794808] ffff8880165dd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.795687] ffff8880165dd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.796545] >ffff8880165dd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.797393] ^ [ 25.797810] ffff8880165dd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.798659] ffff8880165dd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 25.799526] ================================================================== [ 25.800455] Disabling lock debugging due to kernel taint [ 27.800295] BUG: Bad rss-counter state mm:00000000385ad785 type:MM_FILEPAGES val:33 [ 27.801211] BUG: Bad rss-counter state mm:00000000385ad785 type:MM_ANONPAGES val:22 [ 28.299874] BUG: Bad rss-counter state mm:0000000014ace678 type:MM_FILEPAGES val:33 [ 28.301244] BUG: Bad rss-counter state mm:0000000014ace678 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18788' (ECDSA) to the list of known hosts. 2023/06/19 15:45:36 fuzzer started 2023/06/19 15:45:36 dialing manager at localhost:44161 2023/06/19 15:45:36 checking machine... 2023/06/19 15:45:36 checking revisions... [ 29.048494] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:45:36 testing simple program... [ 29.107204] cgroup: Unknown subsys name 'net' [ 29.181030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:45:34 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffea00006aa600 RCX=ffffffff81b47f64 RDX=ffff888015a69b40 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888018e118a8 RSP=ffff888019fb7a58 R8 =0000000000000004 R9 =000000000000011a R10=000000000000011a R11=736573203a296e6f R12=000000000000011a R13=000000000000011a R14=ffff888018e11420 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007fd3cfff9700 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=00007effde334f20 CR3=00000000191f6000 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=2035333a35343a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35343a3531203931 XMM08=00007fd3c402fd300000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d010 RBX=1ffff1100d9e1394 RCX=ffffffff812d8ec3 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09c90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ee7 RFL=00000202 [-------] 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 00007f189ec5e900 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=00007ffc21da6000 CR3=000000000e21c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000