[ 27.383338] BUG: Bad rss-counter state mm:000000004b48bce9 type:MM_FILEPAGES val:33 [ 27.384558] BUG: Bad rss-counter state mm:000000004b48bce9 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.452223] ================================================================== [ 27.453137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.454072] Read of size 8 at addr ffff88800e6753f8 by task sshd/220 [ 27.454848] [ 27.455074] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.456149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.457138] Call Trace: [ 27.457458] [ 27.457768] dump_stack_lvl+0x91/0xf0 [ 27.458261] print_report+0xcc/0x620 [ 27.458746] ? __virt_addr_valid+0x102/0x340 [ 27.459292] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.459912] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.460542] kasan_report+0xbe/0xf0 [ 27.461018] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.461644] vma_interval_tree_remove+0xc75/0xec0 [ 27.462256] vma_prepare+0xc54/0x11a0 [ 27.462742] __split_vma+0x5af/0x950 [ 27.463215] ? __pfx___split_vma+0x10/0x10 [ 27.463744] ? find_held_lock+0x2c/0x110 [ 27.464269] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.464853] ? lock_is_held_type+0x9f/0x120 [ 27.465399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.466014] ? mtree_range_walk+0x632/0x900 [ 27.466564] ? mas_walk+0x5c7/0x7c0 [ 27.467039] do_vmi_munmap+0x1f1/0x2b0 [ 27.467530] mmap_region+0x1f9/0x2660 [ 27.468009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.468542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.469262] ? __pfx_lock_acquire+0x10/0x10 [ 27.469810] ? __pfx_mmap_region+0x10/0x10 [ 27.470351] ? security_mmap_addr+0x7d/0xa0 [ 27.470885] ? get_unmapped_area+0x1f5/0x3f0 [ 27.471443] do_mmap+0x854/0xf00 [ 27.471885] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.472387] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.472959] ksys_mmap_pgoff+0x3af/0x500 [ 27.473471] do_syscall_64+0x3f/0x90 [ 27.473953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.474599] RIP: 0033:0x7f3367b4bd82 [ 27.475069] 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 [ 27.477244] RSP: 002b:00007fffecc990c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.478153] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3367b4bd82 [ 27.479015] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3366f85000 [ 27.479864] RBP: 00007f3366f85000 R08: 0000000000000009 R09: 0000000000001000 [ 27.480738] R10: 0000000000000812 R11: 0000000000000206 R12: 000056017faf0ec0 [ 27.481587] R13: 00007fffecc990e0 R14: 00007fffecc99110 R15: 00007fffecc99470 [ 27.482457] [ 27.482753] [ 27.482970] Allocated by task 213: [ 27.483400] kasan_save_stack+0x22/0x50 [ 27.483909] kasan_set_track+0x25/0x30 [ 27.484405] __kasan_slab_alloc+0x59/0x70 [ 27.484954] kmem_cache_alloc+0x16b/0x370 [ 27.485473] vm_area_dup+0x20/0x160 [ 27.485930] __split_vma+0x170/0x950 [ 27.486400] split_vma+0xc6/0x110 [ 27.486844] mprotect_fixup+0x8d2/0xb30 [ 27.487351] do_mprotect_pkey+0x87e/0xd40 [ 27.487872] __x64_sys_mprotect+0x78/0xc0 [ 27.488398] do_syscall_64+0x3f/0x90 [ 27.488887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.489528] [ 27.489745] Freed by task 213: [ 27.490137] kasan_save_stack+0x22/0x50 [ 27.490646] kasan_set_track+0x25/0x30 [ 27.491146] kasan_save_free_info+0x2b/0x50 [ 27.491686] __kasan_slab_free+0x10a/0x190 [ 27.492218] kmem_cache_free+0x10d/0x4d0 [ 27.492736] rcu_core+0x8c8/0x2860 [ 27.493181] __do_softirq+0x1b7/0x7d4 [ 27.493664] [ 27.493879] Last potentially related work creation: [ 27.494467] kasan_save_stack+0x22/0x50 [ 27.494976] __kasan_record_aux_stack+0x8e/0xa0 [ 27.495558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.496202] remove_vma+0x139/0x170 [ 27.496669] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.497230] do_vmi_munmap+0x1f1/0x2b0 [ 27.497718] __vm_munmap+0x138/0x3a0 [ 27.498190] __x64_sys_munmap+0x59/0x80 [ 27.498683] do_syscall_64+0x3f/0x90 [ 27.499162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.499808] [ 27.500024] Second to last potentially related work creation: [ 27.500715] kasan_save_stack+0x22/0x50 [ 27.501220] __kasan_record_aux_stack+0x8e/0xa0 [ 27.501803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.502447] remove_vma+0x139/0x170 [ 27.502899] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.503461] do_vmi_munmap+0x1f1/0x2b0 [ 27.503946] mmap_region+0x1f9/0x2660 [ 27.504430] do_mmap+0x854/0xf00 [ 27.504867] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.505362] ksys_mmap_pgoff+0x3af/0x500 [ 27.505864] do_syscall_64+0x3f/0x90 [ 27.506338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.506989] [ 27.507205] The buggy address belongs to the object at ffff88800e6753a0 [ 27.507205] which belongs to the cache vm_area_struct of size 168 [ 27.508692] The buggy address is located 88 bytes inside of [ 27.508692] freed 168-byte region [ffff88800e6753a0, ffff88800e675448) [ 27.510104] [ 27.510322] The buggy address belongs to the physical page: [ 27.510988] page:0000000046bc9407 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe675 [ 27.512076] memcg:ffff88800f219f01 [ 27.512517] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.513159] page_type: 0xffffffff() [ 27.513609] raw: 0100000000000200 ffff88800879fc80 ffffea0000342c80 dead000000000004 [ 27.514527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f219f01 [ 27.515446] page dumped because: kasan: bad access detected [ 27.516107] [ 27.516321] Memory state around the buggy address: [ 27.516921] ffff88800e675280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 27.517786] ffff88800e675300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 27.518646] >ffff88800e675380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 27.519509] ^ [ 27.520363] ffff88800e675400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 27.521241] ffff88800e675480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.522105] ================================================================== [ 27.523243] Disabling lock debugging due to kernel taint [ 29.459795] BUG: Bad rss-counter state mm:00000000958baf2b type:MM_FILEPAGES val:33 [ 29.460970] BUG: Bad rss-counter state mm:00000000958baf2b type:MM_ANONPAGES val:22 [ 29.905769] BUG: Bad rss-counter state mm:00000000ecc6d57a type:MM_FILEPAGES val:33 [ 29.906721] BUG: Bad rss-counter state mm:00000000ecc6d57a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51542' (ECDSA) to the list of known hosts. 2023/06/19 20:14:11 fuzzer started 2023/06/19 20:14:11 dialing manager at localhost:44161 2023/06/19 20:14:11 checking machine... 2023/06/19 20:14:11 checking revisions... [ 30.628694] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:14:11 testing simple program... [ 30.684149] cgroup: Unknown subsys name 'net' [ 30.748405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:14:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002d0ff54 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88801687fa88 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88806ce3de20 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007f954066f900 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=00007ffec833cff8 CR3=0000000019dbc000 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=00007fcfca8a8030 CR3=0000000013a7c000 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=8b6a27f33a06b5ace54a9627878145de XMM02=2c67c8bc2e329bc3000000000011e488 XMM03=fb795ef6d65770560000000000124770 XMM04=a12c63be79c9ae6200000000000ae988 XMM05=19e9129bd510f2350000000000135678 XMM06=ce9ef3f2c913ee0d0000000000134580 XMM07=e042d86d42eb936e0000000000124a48 XMM08=544ba5072d7e8362000000000011e4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000