[ 33.735522] BUG: Bad rss-counter state mm:00000000e4918001 type:MM_FILEPAGES val:33 [ 33.736732] BUG: Bad rss-counter state mm:00000000e4918001 type:MM_ANONPAGES val:22 [ 33.847048] ================================================================== [ 33.848137] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.848935] Read of size 8 at addr ffff88801a3dba50 by task sshd/219 [ 33.849606] [ 33.849784] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.850432] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.851160] Call Trace: [ 33.851403] [ 33.851617] dump_stack_lvl+0x91/0xf0 [ 33.852002] print_report+0xcc/0x620 [ 33.852368] ? __virt_addr_valid+0x102/0x340 [ 33.852788] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.853254] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.853716] kasan_report+0xbe/0xf0 [ 33.854072] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.854544] vma_interval_tree_remove+0xc75/0xec0 [ 33.854995] vma_prepare+0xc54/0x11a0 [ 33.855359] __split_vma+0x5af/0x950 [ 33.855720] ? __pfx___split_vma+0x10/0x10 [ 33.856131] ? find_held_lock+0x2c/0x110 [ 33.856524] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.856958] ? lock_is_held_type+0x9f/0x120 [ 33.857369] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.857826] ? mtree_range_walk+0x632/0x900 [ 33.858238] ? mas_walk+0x5c7/0x7c0 [ 33.858596] do_vmi_munmap+0x1f1/0x2b0 [ 33.858968] mmap_region+0x1f9/0x2660 [ 33.859334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.859746] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.860289] ? __pfx_lock_acquire+0x10/0x10 [ 33.860617] ? __pfx_mmap_region+0x10/0x10 [ 33.860918] ? security_mmap_addr+0x7d/0xa0 [ 33.861219] ? get_unmapped_area+0x1f5/0x3f0 [ 33.861529] do_mmap+0x854/0xf00 [ 33.861776] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.862051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.862368] ksys_mmap_pgoff+0x3af/0x500 [ 33.862653] do_syscall_64+0x3f/0x90 [ 33.862919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.863281] RIP: 0033:0x7ff40f699d82 [ 33.863543] 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 [ 33.864744] RSP: 002b:00007fff1673db18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.865258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff40f699d82 [ 33.865739] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff40ead3000 [ 33.866216] RBP: 00007ff40ead3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.866697] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bcfe80f70 [ 33.867176] R13: 00007fff1673db30 R14: 00007fff1673db60 R15: 00007fff1673dec0 [ 33.867663] [ 33.867827] [ 33.867946] Allocated by task 212: [ 33.868183] kasan_save_stack+0x22/0x50 [ 33.868467] kasan_set_track+0x25/0x30 [ 33.868746] __kasan_slab_alloc+0x59/0x70 [ 33.869037] kmem_cache_alloc+0x16b/0x370 [ 33.869331] vm_area_dup+0x20/0x160 [ 33.869582] __split_vma+0x170/0x950 [ 33.869840] split_vma+0xc6/0x110 [ 33.870083] mprotect_fixup+0x8d2/0xb30 [ 33.870365] do_mprotect_pkey+0x87e/0xd40 [ 33.870656] __x64_sys_mprotect+0x78/0xc0 [ 33.870945] do_syscall_64+0x3f/0x90 [ 33.871208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.871568] [ 33.871689] Freed by task 13: [ 33.871907] kasan_save_stack+0x22/0x50 [ 33.872187] kasan_set_track+0x25/0x30 [ 33.872462] kasan_save_free_info+0x2b/0x50 [ 33.872753] __kasan_slab_free+0x10a/0x190 [ 33.873048] kmem_cache_free+0x10d/0x4d0 [ 33.873337] rcu_core+0x8c8/0x2860 [ 33.873578] __do_softirq+0x1b7/0x7d4 [ 33.873837] [ 33.873954] Last potentially related work creation: [ 33.874279] kasan_save_stack+0x22/0x50 [ 33.874557] __kasan_record_aux_stack+0x8e/0xa0 [ 33.874873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.875229] remove_vma+0x139/0x170 [ 33.875478] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.875789] do_vmi_munmap+0x1f1/0x2b0 [ 33.876058] __vm_munmap+0x138/0x3a0 [ 33.876317] __x64_sys_munmap+0x59/0x80 [ 33.876591] do_syscall_64+0x3f/0x90 [ 33.876854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.877208] [ 33.877327] The buggy address belongs to the object at ffff88801a3db9f8 [ 33.877327] which belongs to the cache vm_area_struct of size 168 [ 33.878137] The buggy address is located 88 bytes inside of [ 33.878137] freed 168-byte region [ffff88801a3db9f8, ffff88801a3dbaa0) [ 33.878913] [ 33.879035] The buggy address belongs to the physical page: [ 33.879412] page:0000000072464111 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3db [ 33.880022] memcg:ffff88801a3a3e01 [ 33.880257] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.880619] page_type: 0xffffffff() [ 33.880873] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.881390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3a3e01 [ 33.881899] page dumped because: kasan: bad access detected [ 33.882267] [ 33.882391] Memory state around the buggy address: [ 33.882715] ffff88801a3db900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.883187] ffff88801a3db980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.883661] >ffff88801a3dba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.884134] ^ [ 33.884530] ffff88801a3dba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.885002] ffff88801a3dbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.885473] ================================================================== [ 33.886007] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.865679] BUG: Bad rss-counter state mm:00000000c8f1ec53 type:MM_FILEPAGES val:33 [ 35.866937] BUG: Bad rss-counter state mm:00000000c8f1ec53 type:MM_ANONPAGES val:22 [ 36.440831] BUG: Bad rss-counter state mm:00000000f6a418f2 type:MM_FILEPAGES val:33 [ 36.442051] BUG: Bad rss-counter state mm:00000000f6a418f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5847' (ECDSA) to the list of known hosts. 2023/06/19 11:38:37 fuzzer started 2023/06/19 11:38:37 dialing manager at localhost:44161 2023/06/19 11:38:37 checking machine... 2023/06/19 11:38:37 checking revisions... [ 37.081739] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:38:37 testing simple program... [ 37.123068] cgroup: Unknown subsys name 'net' [ 37.167438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:38:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fbe54735000 CR3=000000000d686000 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=f8c9a1c88b6378bce54fe55bcd32d4dc XMM02=000000000011d4d8eff9b2d0a8fce9cb XMM03=000000000011d5a82c67c8bc2e329bc3 XMM04=6c3faabd6a9c772b00000000000ae988 XMM05=dfcdbad4f1609c370000000000133f30 XMM06=8ef4df2e9c32fe6d0000000000133108 XMM07=e042d86d42eb936e0000000000124910 XMM08=853e22ce29ea3f8e000000000011d5a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8562bbf8 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000000b8 RSI=ffffffff87b69578 RDI=ffffffff8562bcf0 RBP=ffff88806cf09db8 RSP=ffff88806cf09ce8 R8 =00000f423ffff834 R9 =00000000000007cc R10=00000f423ffff834 R11=000f424000000000 R12=00000000005b99b3 R13=003b9aca00000000 R14=ffffffff85497f20 R15=0000000000000000 RIP=ffffffff8450d100 RFL=00000006 [-----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 00007fef486ac900 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=00007ffc2534c000 CR3=000000000d910000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000