syzkaller login: [ 30.577825] BUG: Bad rss-counter state mm:000000005eb94870 type:MM_FILEPAGES val:33 [ 30.578888] BUG: Bad rss-counter state mm:000000005eb94870 type:MM_ANONPAGES val:22 [ 30.617050] ================================================================== [ 30.617932] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.618870] Read of size 8 at addr ffff888015968df0 by task sshd/220 [ 30.619592] [ 30.619801] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.620761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.621672] Call Trace: [ 30.621989] [ 30.622267] dump_stack_lvl+0x91/0xf0 [ 30.622747] print_report+0xcc/0x620 [ 30.623204] ? __virt_addr_valid+0x102/0x340 [ 30.623729] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.624319] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.624900] kasan_report+0xbe/0xf0 [ 30.625350] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.625962] vma_interval_tree_remove+0xc75/0xec0 [ 30.626537] vma_prepare+0xc54/0x11a0 [ 30.627009] __split_vma+0x5af/0x950 [ 30.627508] ? __pfx___split_vma+0x10/0x10 [ 30.628035] ? find_held_lock+0x2c/0x110 [ 30.628580] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.629165] ? lock_is_held_type+0x9f/0x120 [ 30.629721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.630354] ? mtree_range_walk+0x632/0x900 [ 30.630916] ? mas_walk+0x5c7/0x7c0 [ 30.631397] do_vmi_munmap+0x1f1/0x2b0 [ 30.631897] mmap_region+0x1f9/0x2660 [ 30.632391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.632912] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.633628] ? __pfx_lock_acquire+0x10/0x10 [ 30.634179] ? __pfx_mmap_region+0x10/0x10 [ 30.634755] ? security_mmap_addr+0x7d/0xa0 [ 30.635292] ? get_unmapped_area+0x1f5/0x3f0 [ 30.635848] do_mmap+0x854/0xf00 [ 30.636293] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.636791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.637352] ksys_mmap_pgoff+0x3af/0x500 [ 30.637866] do_syscall_64+0x3f/0x90 [ 30.638361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.639008] RIP: 0033:0x7f7824e84d82 [ 30.639467] 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 [ 30.641609] RSP: 002b:00007ffcc99ac6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.642539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7824e84d82 [ 30.643425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78242be000 [ 30.644288] RBP: 00007f78242be000 R08: 0000000000000009 R09: 0000000000001000 [ 30.645143] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2eceecd90 [ 30.646014] R13: 00007ffcc99ac6e0 R14: 00007ffcc99ac710 R15: 00007ffcc99aca70 [ 30.646887] [ 30.647186] [ 30.647402] Allocated by task 213: [ 30.647842] kasan_save_stack+0x22/0x50 [ 30.648349] kasan_set_track+0x25/0x30 [ 30.648851] __kasan_slab_alloc+0x59/0x70 [ 30.649381] kmem_cache_alloc+0x16b/0x370 [ 30.649904] vm_area_dup+0x20/0x160 [ 30.650385] __split_vma+0x170/0x950 [ 30.650853] split_vma+0xc6/0x110 [ 30.651295] mprotect_fixup+0x8d2/0xb30 [ 30.651803] do_mprotect_pkey+0x87e/0xd40 [ 30.652348] __x64_sys_mprotect+0x78/0xc0 [ 30.652881] do_syscall_64+0x3f/0x90 [ 30.653367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.654029] [ 30.654250] Freed by task 213: [ 30.654645] kasan_save_stack+0x22/0x50 [ 30.655157] kasan_set_track+0x25/0x30 [ 30.655659] kasan_save_free_info+0x2b/0x50 [ 30.656197] __kasan_slab_free+0x10a/0x190 [ 30.656738] kmem_cache_free+0x10d/0x4d0 [ 30.657252] rcu_core+0x8c8/0x2860 [ 30.657696] __do_softirq+0x1b7/0x7d4 [ 30.658182] [ 30.658397] Last potentially related work creation: [ 30.658990] kasan_save_stack+0x22/0x50 [ 30.659501] __kasan_record_aux_stack+0x8e/0xa0 [ 30.660074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.660763] remove_vma+0x139/0x170 [ 30.661227] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.661850] do_vmi_munmap+0x1f1/0x2b0 [ 30.662378] __vm_munmap+0x138/0x3a0 [ 30.662869] __x64_sys_munmap+0x59/0x80 [ 30.663375] do_syscall_64+0x3f/0x90 [ 30.663854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.664509] [ 30.664725] The buggy address belongs to the object at ffff888015968d98 [ 30.664725] which belongs to the cache vm_area_struct of size 168 [ 30.666252] The buggy address is located 88 bytes inside of [ 30.666252] freed 168-byte region [ffff888015968d98, ffff888015968e40) [ 30.667611] [ 30.667828] The buggy address belongs to the physical page: [ 30.668470] page:000000000526841c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15968 [ 30.669530] memcg:ffff888015a9d201 [ 30.669994] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.670644] page_type: 0xffffffff() [ 30.671070] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.671932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a9d201 [ 30.672787] page dumped because: kasan: bad access detected [ 30.673424] [ 30.673634] Memory state around the buggy address: [ 30.674216] ffff888015968c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.675046] ffff888015968d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.675900] >ffff888015968d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.676756] ^ [ 30.677562] ffff888015968e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.678447] ffff888015968e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.679276] ================================================================== [ 30.680207] Disabling lock debugging due to kernel taint [ 32.639188] BUG: Bad rss-counter state mm:00000000eb17ddd2 type:MM_FILEPAGES val:33 [ 32.640162] BUG: Bad rss-counter state mm:00000000eb17ddd2 type:MM_ANONPAGES val:22 [ 33.152937] BUG: Bad rss-counter state mm:00000000e79b511a type:MM_FILEPAGES val:33 [ 33.154111] BUG: Bad rss-counter state mm:00000000e79b511a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53351' (ECDSA) to the list of known hosts. 2023/06/20 07:09:37 fuzzer started 2023/06/20 07:09:37 dialing manager at localhost:44161 2023/06/20 07:09:37 checking machine... 2023/06/20 07:09:37 checking revisions... [ 33.799201] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:09:38 testing simple program... [ 33.842877] cgroup: Unknown subsys name 'net' [ 33.883996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:09:36 Registers: info registers vcpu 0 RAX=1ffffffff0bcc782 RBX=ffffffff85e63c14 RCX=ffffffff81f553e2 RDX=0000000000000000 RSI=ffffffff861d1ff6 RDI=ffffffff85e63bf0 RBP=ffffffff85e63bf0 RSP=ffff888019ddf3e8 R8 =ffffffff861d1ff6 R9 =ffff888019ddf4e0 R10=0000000000038001 R11=000000000003aa07 R12=ffffffff85e63c38 R13=ffffffff85e63bf0 R14=ffffffff85e63bf0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007ff8ff1cd700 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=00007fdbc9975618 CR3=0000000013a10000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037333a3930 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363038 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f3627130510 CR3=000000000d852000 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=f429c23f644313adfc4aa556253dd702 XMM02=000000000011f3c0ec2efd57dc4c00df XMM03=0000000000123a40d1bb6223753f37fa XMM04=94e775cccb9d5bbf00000000000ae988 XMM05=19e9129bd510f2350000000000133618 XMM06=4fda316b135da52b00000000001334a0 XMM07=e042d86d42eb936e0000000000123cc0 XMM08=d1bb6223753f37fa000000000011f420 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000