[ 23.593866] BUG: Bad rss-counter state mm:000000006635979a type:MM_FILEPAGES val:33 [ 23.594594] BUG: Bad rss-counter state mm:000000006635979a type:MM_ANONPAGES val:22 [ 23.752361] ================================================================== [ 23.753324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.754268] Read of size 8 at addr ffff88800f0b13f8 by task sshd/220 [ 23.755056] [ 23.755278] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.756313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.757329] Call Trace: [ 23.757653] [ 23.757966] dump_stack_lvl+0x91/0xf0 [ 23.758466] print_report+0xcc/0x620 [ 23.758952] ? __virt_addr_valid+0x102/0x340 [ 23.759516] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.760149] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.760789] kasan_report+0xbe/0xf0 [ 23.761265] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.761889] vma_interval_tree_remove+0xc75/0xec0 [ 23.762496] vma_prepare+0xc54/0x11a0 [ 23.762981] __split_vma+0x5af/0x950 [ 23.763452] ? __pfx___split_vma+0x10/0x10 [ 23.763987] ? find_held_lock+0x2c/0x110 [ 23.764506] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.765088] ? lock_is_held_type+0x9f/0x120 [ 23.765629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.766236] ? mtree_range_walk+0x632/0x900 [ 23.766795] ? mas_walk+0x5c7/0x7c0 [ 23.767276] do_vmi_munmap+0x1f1/0x2b0 [ 23.767770] mmap_region+0x1f9/0x2660 [ 23.768256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.768794] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.769512] ? __pfx_lock_acquire+0x10/0x10 [ 23.770047] ? __pfx_mmap_region+0x10/0x10 [ 23.770576] ? security_mmap_addr+0x7d/0xa0 [ 23.771110] ? get_unmapped_area+0x1f5/0x3f0 [ 23.771667] do_mmap+0x854/0xf00 [ 23.772116] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.772614] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.773191] ksys_mmap_pgoff+0x3af/0x500 [ 23.773700] do_syscall_64+0x3f/0x90 [ 23.774198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.774856] RIP: 0033:0x7fa606355d82 [ 23.775312] 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 [ 23.777483] RSP: 002b:00007ffc78708748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.778439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa606355d82 [ 23.779297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa60578f000 [ 23.780171] RBP: 00007fa60578f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.781036] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564576a4ad90 [ 23.781910] R13: 00007ffc78708760 R14: 00007ffc78708790 R15: 00007ffc78708af0 [ 23.782799] [ 23.783102] [ 23.783321] Allocated by task 213: [ 23.783762] kasan_save_stack+0x22/0x50 [ 23.784276] kasan_set_track+0x25/0x30 [ 23.784786] __kasan_slab_alloc+0x59/0x70 [ 23.785322] kmem_cache_alloc+0x16b/0x370 [ 23.785851] vm_area_dup+0x20/0x160 [ 23.786310] __split_vma+0x170/0x950 [ 23.786780] split_vma+0xc6/0x110 [ 23.787234] mprotect_fixup+0x8d2/0xb30 [ 23.787746] do_mprotect_pkey+0x87e/0xd40 [ 23.788288] __x64_sys_mprotect+0x78/0xc0 [ 23.788840] do_syscall_64+0x3f/0x90 [ 23.789321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.789969] [ 23.790191] Freed by task 213: [ 23.790592] kasan_save_stack+0x22/0x50 [ 23.791098] kasan_set_track+0x25/0x30 [ 23.791595] kasan_save_free_info+0x2b/0x50 [ 23.792139] __kasan_slab_free+0x10a/0x190 [ 23.792690] kmem_cache_free+0x10d/0x4d0 [ 23.793206] rcu_core+0x8c8/0x2860 [ 23.793661] __do_softirq+0x1b7/0x7d4 [ 23.794151] [ 23.794373] Last potentially related work creation: [ 23.794968] kasan_save_stack+0x22/0x50 [ 23.795475] __kasan_record_aux_stack+0x8e/0xa0 [ 23.796052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.796702] remove_vma+0x139/0x170 [ 23.797167] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.797824] do_vmi_munmap+0x1f1/0x2b0 [ 23.798309] __vm_munmap+0x138/0x3a0 [ 23.798782] __x64_sys_munmap+0x59/0x80 [ 23.799284] do_syscall_64+0x3f/0x90 [ 23.799756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.800403] [ 23.800620] The buggy address belongs to the object at ffff88800f0b13a0 [ 23.800620] which belongs to the cache vm_area_struct of size 168 [ 23.802103] The buggy address is located 88 bytes inside of [ 23.802103] freed 168-byte region [ffff88800f0b13a0, ffff88800f0b1448) [ 23.803520] [ 23.803739] The buggy address belongs to the physical page: [ 23.804407] page:00000000d22ebfd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0b1 [ 23.805502] memcg:ffff88800c4b6c01 [ 23.805933] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.806577] page_type: 0xffffffff() [ 23.807034] raw: 0100000000000200 ffff8880087a0c80 ffffea00006852c0 000000000000000e [ 23.807963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4b6c01 [ 23.808892] page dumped because: kasan: bad access detected [ 23.809557] [ 23.809776] Memory state around the buggy address: [ 23.810366] ffff88800f0b1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.811240] ffff88800f0b1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.812101] >ffff88800f0b1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.812974] ^ [ 23.813818] ffff88800f0b1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.814676] ffff88800f0b1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.815535] ================================================================== [ 23.816482] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.878869] BUG: Bad rss-counter state mm:000000007b74c616 type:MM_FILEPAGES val:33 [ 25.880039] BUG: Bad rss-counter state mm:000000007b74c616 type:MM_ANONPAGES val:22 [ 26.306157] BUG: Bad rss-counter state mm:0000000057bfb0a4 type:MM_FILEPAGES val:33 [ 26.307216] BUG: Bad rss-counter state mm:0000000057bfb0a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9003' (ECDSA) to the list of known hosts. 2023/06/20 12:44:12 fuzzer started 2023/06/20 12:44:12 dialing manager at localhost:36067 2023/06/20 12:44:12 checking machine... 2023/06/20 12:44:12 checking revisions... [ 27.100643] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:44:13 testing simple program... [ 27.155306] cgroup: Unknown subsys name 'net' [ 27.208231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:44:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8161a522 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff848ced00 RSP=ffffffff85407ce0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000011594 R15=0000000000000001 RIP=ffffffff8161a52a RFL=00000047 [---Z-PC] 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 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=00007ffef8f1fd68 CR3=000000000d9ec000 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=2032313a34343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a34343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100189d481 RBX=000000000000000a RCX=dffffc0000000000 RDX=ffff88800fe4b680 RSI=ffffffff83723d07 RDI=ffff88800c4ea408 RBP=000000000000000b RSP=ffff8880145ef7c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff87f99b30 R14=ffffffff83c61280 R15=0000000000000006 RIP=ffffffff83723d2a 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 00007fe3b4c9b900 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=00007fe3b5252618 CR3=000000000e962000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000