[ 43.285235] BUG: Bad rss-counter state mm:000000003422a0cd type:MM_FILEPAGES val:33 [ 43.286438] BUG: Bad rss-counter state mm:000000003422a0cd type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.433415] ================================================================== [ 43.434334] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.435273] Read of size 8 at addr ffff88800da6b968 by task sshd/219 [ 43.436157] [ 43.436378] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.437251] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.438244] Call Trace: [ 43.438563] [ 43.438851] dump_stack_lvl+0x91/0xf0 [ 43.439343] print_report+0xcc/0x620 [ 43.439844] ? __virt_addr_valid+0x102/0x340 [ 43.440408] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.441050] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.441676] kasan_report+0xbe/0xf0 [ 43.442156] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.442783] vma_interval_tree_remove+0xc75/0xec0 [ 43.443404] vma_prepare+0xc54/0x11a0 [ 43.443889] __split_vma+0x5af/0x950 [ 43.444364] ? __pfx___split_vma+0x10/0x10 [ 43.444907] ? find_held_lock+0x2c/0x110 [ 43.445431] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.446000] ? lock_is_held_type+0x9f/0x120 [ 43.446535] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.447146] ? mtree_range_walk+0x632/0x900 [ 43.447702] ? mas_walk+0x5c7/0x7c0 [ 43.448184] do_vmi_munmap+0x1f1/0x2b0 [ 43.448685] mmap_region+0x1f9/0x2660 [ 43.449197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.449713] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.450446] ? __pfx_lock_acquire+0x10/0x10 [ 43.450982] ? __pfx_mmap_region+0x10/0x10 [ 43.451512] ? security_mmap_addr+0x7d/0xa0 [ 43.452050] ? get_unmapped_area+0x1f5/0x3f0 [ 43.452601] do_mmap+0x854/0xf00 [ 43.453055] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.453554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.454131] ksys_mmap_pgoff+0x3af/0x500 [ 43.454644] do_syscall_64+0x3f/0x90 [ 43.455126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.455790] RIP: 0033:0x7f51bb264d82 [ 43.456252] 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 [ 43.458437] RSP: 002b:00007ffce717b298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.459359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51bb264d82 [ 43.460214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51ba69e000 [ 43.461080] RBP: 00007f51ba69e000 R08: 0000000000000009 R09: 0000000000001000 [ 43.461933] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b945afec0 [ 43.462790] R13: 00007ffce717b2b0 R14: 00007ffce717b2e0 R15: 00007ffce717b640 [ 43.463665] [ 43.463961] [ 43.464177] Allocated by task 212: [ 43.464617] kasan_save_stack+0x22/0x50 [ 43.465147] kasan_set_track+0x25/0x30 [ 43.465647] __kasan_slab_alloc+0x59/0x70 [ 43.466181] kmem_cache_alloc+0x16b/0x370 [ 43.466699] vm_area_dup+0x20/0x160 [ 43.467156] __split_vma+0x170/0x950 [ 43.467629] split_vma+0xc6/0x110 [ 43.468075] mprotect_fixup+0x8d2/0xb30 [ 43.468595] do_mprotect_pkey+0x87e/0xd40 [ 43.469149] __x64_sys_mprotect+0x78/0xc0 [ 43.469676] do_syscall_64+0x3f/0x90 [ 43.470152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.470801] [ 43.471017] Freed by task 212: [ 43.471411] kasan_save_stack+0x22/0x50 [ 43.471923] kasan_set_track+0x25/0x30 [ 43.472418] kasan_save_free_info+0x2b/0x50 [ 43.472965] __kasan_slab_free+0x10a/0x190 [ 43.473502] kmem_cache_free+0x10d/0x4d0 [ 43.474021] rcu_core+0x8c8/0x2860 [ 43.474474] __do_softirq+0x1b7/0x7d4 [ 43.474957] [ 43.475173] Last potentially related work creation: [ 43.475767] kasan_save_stack+0x22/0x50 [ 43.476273] __kasan_record_aux_stack+0x8e/0xa0 [ 43.476848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.477503] remove_vma+0x139/0x170 [ 43.477960] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.478525] do_vmi_munmap+0x1f1/0x2b0 [ 43.479029] __vm_munmap+0x138/0x3a0 [ 43.479506] __x64_sys_munmap+0x59/0x80 [ 43.480020] do_syscall_64+0x3f/0x90 [ 43.480495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.481148] [ 43.481369] Second to last potentially related work creation: [ 43.482056] kasan_save_stack+0x22/0x50 [ 43.482565] __kasan_record_aux_stack+0x8e/0xa0 [ 43.483139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.483783] remove_vma+0x139/0x170 [ 43.484242] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.484803] do_vmi_munmap+0x1f1/0x2b0 [ 43.485321] mmap_region+0x1f9/0x2660 [ 43.485811] do_mmap+0x854/0xf00 [ 43.486244] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.486735] ksys_mmap_pgoff+0x3af/0x500 [ 43.487255] do_syscall_64+0x3f/0x90 [ 43.487742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.488392] [ 43.488609] The buggy address belongs to the object at ffff88800da6b910 [ 43.488609] which belongs to the cache vm_area_struct of size 168 [ 43.490108] The buggy address is located 88 bytes inside of [ 43.490108] freed 168-byte region [ffff88800da6b910, ffff88800da6b9b8) [ 43.491539] [ 43.491763] The buggy address belongs to the physical page: [ 43.492444] page:00000000b9ca3224 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda6b [ 43.493558] memcg:ffff88800ef61a01 [ 43.493992] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.494705] page_type: 0xffffffff() [ 43.495164] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.496104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef61a01 [ 43.497036] page dumped because: kasan: bad access detected [ 43.497701] [ 43.497916] Memory state around the buggy address: [ 43.498511] ffff88800da6b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 43.499378] ffff88800da6b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 43.500235] >ffff88800da6b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.501117] ^ [ 43.501909] ffff88800da6b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 43.502778] ffff88800da6ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.503643] ================================================================== [ 43.504771] Disabling lock debugging due to kernel taint [ 46.123942] BUG: Bad rss-counter state mm:00000000a1fe35c8 type:MM_FILEPAGES val:33 [ 46.125160] BUG: Bad rss-counter state mm:00000000a1fe35c8 type:MM_ANONPAGES val:22 [ 46.623246] BUG: Bad rss-counter state mm:0000000051d841da type:MM_FILEPAGES val:33 [ 46.624228] BUG: Bad rss-counter state mm:0000000051d841da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19192' (ECDSA) to the list of known hosts. 2023/06/20 00:03:58 fuzzer started 2023/06/20 00:03:59 dialing manager at localhost:44161 2023/06/20 00:03:59 checking machine... 2023/06/20 00:03:59 checking revisions... [ 47.342635] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:03:59 testing simple program... [ 47.398405] cgroup: Unknown subsys name 'net' [ 47.457787] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:03:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800d802a00 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff81efde19 RDI=ffff88800ecda1cc RBP=ffff88800ecda1c0 RSP=ffff8880099f7998 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000001 R12=0000000000000005 R13=1ffff1100133ef34 R14=ffff88800d802b90 R15=ffff88800d802b90 RIP=ffffffff81f1b0e4 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 00007fb6d594b900 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=00007ffce9b0f000 CR3=000000000d9ee000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fb530e24370 CR3=000000000ca0c000 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=7bdc606a14b92595494ae39d89689e50 XMM02=2c67c8bc2e329bc3000000000011eab8 XMM03=fb795ef6d65770560000000000124cc0 XMM04=5ac08fa797c31bee00000000000ae988 XMM05=dfcdbad4f1609c3700000000001358f8 XMM06=a944b753b066a03e0000000000134ad0 XMM07=e042d86d42eb936e0000000000124f40 XMM08=1d6217b448d7a1bc000000000011eb18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000