[ 23.713052] BUG: Bad rss-counter state mm:000000005524e2b8 type:MM_FILEPAGES val:33 [ 23.714736] BUG: Bad rss-counter state mm:000000005524e2b8 type:MM_ANONPAGES val:22 [ 23.877518] ================================================================== [ 23.878446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.879395] Read of size 8 at addr ffff88800e4f7a50 by task sshd/220 [ 23.880174] [ 23.880446] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.881365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.882362] Call Trace: [ 23.882684] [ 23.882969] dump_stack_lvl+0x91/0xf0 [ 23.883469] print_report+0xcc/0x620 [ 23.883956] ? __virt_addr_valid+0x102/0x340 [ 23.884525] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.885224] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.885886] kasan_report+0xbe/0xf0 [ 23.886390] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.887055] vma_interval_tree_remove+0xc75/0xec0 [ 23.887682] vma_prepare+0xc54/0x11a0 [ 23.888197] __split_vma+0x5af/0x950 [ 23.888672] ? __pfx___split_vma+0x10/0x10 [ 23.889212] ? find_held_lock+0x2c/0x110 [ 23.889735] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.890311] ? lock_is_held_type+0x9f/0x120 [ 23.890878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.891494] ? mtree_range_walk+0x632/0x900 [ 23.892062] ? mas_walk+0x5c7/0x7c0 [ 23.892551] do_vmi_munmap+0x1f1/0x2b0 [ 23.893070] mmap_region+0x1f9/0x2660 [ 23.893551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.894061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.894799] ? __pfx_lock_acquire+0x10/0x10 [ 23.895329] ? __pfx_mmap_region+0x10/0x10 [ 23.895871] ? security_mmap_addr+0x7d/0xa0 [ 23.896408] ? get_unmapped_area+0x1f5/0x3f0 [ 23.897006] do_mmap+0x854/0xf00 [ 23.897469] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.897993] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.898584] ksys_mmap_pgoff+0x3af/0x500 [ 23.899119] do_syscall_64+0x3f/0x90 [ 23.899622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.900301] RIP: 0033:0x7efcd2f0cd82 [ 23.900776] 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 [ 23.903009] RSP: 002b:00007ffeeb79fd88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.904001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcd2f0cd82 [ 23.904896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcd2346000 [ 23.905762] RBP: 00007efcd2346000 R08: 0000000000000009 R09: 0000000000001000 [ 23.906674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dfbcc75ec0 [ 23.907561] R13: 00007ffeeb79fda0 R14: 00007ffeeb79fdd0 R15: 00007ffeeb7a0130 [ 23.908428] [ 23.908722] [ 23.908947] Allocated by task 213: [ 23.909380] kasan_save_stack+0x22/0x50 [ 23.909931] kasan_set_track+0x25/0x30 [ 23.910463] __kasan_slab_alloc+0x59/0x70 [ 23.910999] kmem_cache_alloc+0x16b/0x370 [ 23.911521] vm_area_dup+0x20/0x160 [ 23.911979] __split_vma+0x170/0x950 [ 23.912452] split_vma+0xc6/0x110 [ 23.912900] mprotect_fixup+0x8d2/0xb30 [ 23.913405] do_mprotect_pkey+0x87e/0xd40 [ 23.913931] __x64_sys_mprotect+0x78/0xc0 [ 23.914470] do_syscall_64+0x3f/0x90 [ 23.914962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.915614] [ 23.915829] Freed by task 19: [ 23.916222] kasan_save_stack+0x22/0x50 [ 23.916729] kasan_set_track+0x25/0x30 [ 23.917253] kasan_save_free_info+0x2b/0x50 [ 23.917795] __kasan_slab_free+0x10a/0x190 [ 23.918341] kmem_cache_free+0x10d/0x4d0 [ 23.918846] rcu_core+0x8c8/0x2860 [ 23.919300] __do_softirq+0x1b7/0x7d4 [ 23.919786] [ 23.920001] Last potentially related work creation: [ 23.920598] kasan_save_stack+0x22/0x50 [ 23.921116] __kasan_record_aux_stack+0x8e/0xa0 [ 23.921768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.922418] remove_vma+0x139/0x170 [ 23.922878] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.923437] do_vmi_munmap+0x1f1/0x2b0 [ 23.923928] __vm_munmap+0x138/0x3a0 [ 23.924406] __x64_sys_munmap+0x59/0x80 [ 23.924928] do_syscall_64+0x3f/0x90 [ 23.925414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.926060] [ 23.926279] The buggy address belongs to the object at ffff88800e4f79f8 [ 23.926279] which belongs to the cache vm_area_struct of size 168 [ 23.927747] The buggy address is located 88 bytes inside of [ 23.927747] freed 168-byte region [ffff88800e4f79f8, ffff88800e4f7aa0) [ 23.929164] [ 23.929380] The buggy address belongs to the physical page: [ 23.930043] page:0000000005efc562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4f7 [ 23.931121] memcg:ffff88800ed8f501 [ 23.931552] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.932199] page_type: 0xffffffff() [ 23.932654] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.933586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed8f501 [ 23.934497] page dumped because: kasan: bad access detected [ 23.935164] [ 23.935383] Memory state around the buggy address: [ 23.935970] ffff88800e4f7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.936841] ffff88800e4f7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 23.937709] >ffff88800e4f7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.938567] ^ [ 23.939270] ffff88800e4f7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 23.940135] ffff88800e4f7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.941017] ================================================================== [ 23.942157] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.754897] BUG: Bad rss-counter state mm:000000005dbc9775 type:MM_FILEPAGES val:33 [ 25.756370] BUG: Bad rss-counter state mm:000000005dbc9775 type:MM_ANONPAGES val:22 [ 26.251222] BUG: Bad rss-counter state mm:000000004eaa36ce type:MM_FILEPAGES val:33 [ 26.252491] BUG: Bad rss-counter state mm:000000004eaa36ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19806' (ECDSA) to the list of known hosts. 2023/06/20 15:00:38 fuzzer started 2023/06/20 15:00:38 dialing manager at localhost:36067 2023/06/20 15:00:38 checking machine... 2023/06/20 15:00:38 checking revisions... [ 26.957390] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:00:38 testing simple program... [ 27.022761] cgroup: Unknown subsys name 'net' [ 27.102711] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:00:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000051 RCX=0000000000000000 RDX=ffff88800f0fb680 RSI=ffffffff83723ca5 RDI=0000000000000005 RBP=0000000000000052 RSP=ffff88800f13f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d68 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0860 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 00007ff78679f900 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=00007ff786d56618 CR3=0000000019eb2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fdcffc17240 CR3=000000000c62c000 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=631c19acedc627871c49ad77292a1306 XMM02=0000000000119a40eff9b2d0a8fce9cb XMM03=0000000000119b102c67c8bc2e329bc3 XMM04=6695f1b31fa88fdd00000000000ae988 XMM05=19e9129bd510f2350000000000130410 XMM06=16386e4b3f741c66000000000012ee80 XMM07=e042d86d42eb936e0000000000120b80 XMM08=b4eccea85d0423990000000000119b10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000