[ 35.658474] BUG: Bad rss-counter state mm:000000000f38aa5c type:MM_FILEPAGES val:32 [ 35.659460] BUG: Bad rss-counter state mm:000000000f38aa5c type:MM_ANONPAGES val:22 [ 35.822116] ================================================================== [ 35.822991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.823871] Read of size 8 at addr ffff88801930c798 by task sshd/220 [ 35.824599] [ 35.824808] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.825809] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.826747] Call Trace: [ 35.827055] [ 35.827326] dump_stack_lvl+0x91/0xf0 [ 35.827792] print_report+0xcc/0x620 [ 35.828254] ? __virt_addr_valid+0x102/0x340 [ 35.828777] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.829359] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.829943] kasan_report+0xbe/0xf0 [ 35.830405] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.831003] vma_interval_tree_remove+0xc75/0xec0 [ 35.831687] vma_prepare+0xc54/0x11a0 [ 35.832252] __split_vma+0x5af/0x950 [ 35.832808] ? __pfx___split_vma+0x10/0x10 [ 35.833434] ? find_held_lock+0x2c/0x110 [ 35.834049] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.834724] ? lock_is_held_type+0x9f/0x120 [ 35.835360] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.836078] ? mtree_range_walk+0x632/0x900 [ 35.836727] ? mas_walk+0x5c7/0x7c0 [ 35.837287] do_vmi_munmap+0x1f1/0x2b0 [ 35.837868] mmap_region+0x1f9/0x2660 [ 35.838453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.839062] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.839907] ? __pfx_lock_acquire+0x10/0x10 [ 35.840537] ? __pfx_mmap_region+0x10/0x10 [ 35.841164] ? security_mmap_addr+0x7d/0xa0 [ 35.841789] ? get_unmapped_area+0x1f5/0x3f0 [ 35.842447] do_mmap+0x854/0xf00 [ 35.842966] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.843551] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.844215] ksys_mmap_pgoff+0x3af/0x500 [ 35.844814] do_syscall_64+0x3f/0x90 [ 35.845371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.846133] RIP: 0033:0x7f1b32cdbd82 [ 35.846689] 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 [ 35.849219] RSP: 002b:00007ffd7a1f93b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.850294] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b32cdbd82 [ 35.851314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b32115000 [ 35.852320] RBP: 00007f1b32115000 R08: 0000000000000009 R09: 0000000000001000 [ 35.853330] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fbb8faf70 [ 35.854340] R13: 00007ffd7a1f93d0 R14: 00007ffd7a1f9400 R15: 00007ffd7a1f9760 [ 35.855356] [ 35.855701] [ 35.855953] Allocated by task 212: [ 35.856462] kasan_save_stack+0x22/0x50 [ 35.857063] kasan_set_track+0x25/0x30 [ 35.857647] __kasan_slab_alloc+0x59/0x70 [ 35.858266] kmem_cache_alloc+0x16b/0x370 [ 35.858900] vm_area_dup+0x20/0x160 [ 35.859438] __split_vma+0x170/0x950 [ 35.859989] split_vma+0xc6/0x110 [ 35.860510] mprotect_fixup+0x8d2/0xb30 [ 35.861102] do_mprotect_pkey+0x87e/0xd40 [ 35.861717] __x64_sys_mprotect+0x78/0xc0 [ 35.862341] do_syscall_64+0x3f/0x90 [ 35.862901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.863660] [ 35.863914] Freed by task 19: [ 35.864369] kasan_save_stack+0x22/0x50 [ 35.864964] kasan_set_track+0x25/0x30 [ 35.865547] kasan_save_free_info+0x2b/0x50 [ 35.866178] __kasan_slab_free+0x10a/0x190 [ 35.866895] kmem_cache_free+0x10d/0x4d0 [ 35.867498] rcu_core+0x8c8/0x2860 [ 35.868025] __do_softirq+0x1b7/0x7d4 [ 35.868587] [ 35.868837] Last potentially related work creation: [ 35.869531] kasan_save_stack+0x22/0x50 [ 35.870125] __kasan_record_aux_stack+0x8e/0xa0 [ 35.870827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.871587] remove_vma+0x139/0x170 [ 35.872122] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.872778] do_vmi_munmap+0x1f1/0x2b0 [ 35.873353] __vm_munmap+0x138/0x3a0 [ 35.873904] __x64_sys_munmap+0x59/0x80 [ 35.874489] do_syscall_64+0x3f/0x90 [ 35.874992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.875681] [ 35.875915] The buggy address belongs to the object at ffff88801930c740 [ 35.875915] which belongs to the cache vm_area_struct of size 168 [ 35.877471] The buggy address is located 88 bytes inside of [ 35.877471] freed 168-byte region [ffff88801930c740, ffff88801930c7e8) [ 35.878970] [ 35.879205] The buggy address belongs to the physical page: [ 35.879903] page:00000000102f80e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1930c [ 35.881062] memcg:ffff88800ea65801 [ 35.881516] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.882200] page_type: 0xffffffff() [ 35.882691] raw: 0100000000000200 ffff88800879fc80 ffffea000064a900 000000000000000e [ 35.883674] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea65801 [ 35.884663] page dumped because: kasan: bad access detected [ 35.885426] [ 35.885671] Memory state around the buggy address: [ 35.886359] ffff88801930c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.887347] ffff88801930c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.888311] >ffff88801930c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.889299] ^ [ 35.889875] ffff88801930c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 35.890842] ffff88801930c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 35.891810] ================================================================== [ 35.892859] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.950000] BUG: Bad rss-counter state mm:0000000041a82440 type:MM_FILEPAGES val:33 [ 37.951004] BUG: Bad rss-counter state mm:0000000041a82440 type:MM_ANONPAGES val:22 [ 38.376402] BUG: Bad rss-counter state mm:00000000e6bab2fb type:MM_FILEPAGES val:33 [ 38.377410] BUG: Bad rss-counter state mm:00000000e6bab2fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62410' (ECDSA) to the list of known hosts. 2023/06/19 22:02:20 fuzzer started 2023/06/19 22:02:20 dialing manager at localhost:44161 2023/06/19 22:02:20 checking machine... 2023/06/19 22:02:20 checking revisions... [ 39.014706] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:02:21 testing simple program... [ 39.062883] cgroup: Unknown subsys name 'net' [ 39.105329] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce361a0 RCX=ffffffff8182e29e RDX=ffffed1001b17f44 RSI=0000000000000004 RDI=ffff88800d8bfa18 RBP=ffff88806ce361e0 RSP=ffff8880099cfbb8 R8 =0000000000000001 R9 =ffffed1001b17f43 R10=ffff88800d8bfa1b R11=00000000000b6996 R12=ffff88800d8bfa00 R13=0000000000000000 R14=0000000000000550 R15=ffff88806ce361f0 RIP=ffffffff8182e2a4 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 00007f91f70bd900 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=00007f91f7674618 CR3=000000000e50e000 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=2030323a32303a3232203931206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a363638323320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32303a3232203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f3e8a7ec040 CR3=000000000ee6c000 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=69521a503bd880bb0e4988ddb263edda XMM02=ec2efd57dc4c00df000000000011e510 XMM03=22ca3a6c8e71e34f000000000011e5e0 XMM04=3486285d41389b8d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001340b0 XMM06=806171799158d9670000000000133f38 XMM07=e042d86d42eb936e0000000000124a60 XMM08=22ca3a6c8e71e34f000000000011e5e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000