syzkaller login: [ 30.742015] BUG: Bad rss-counter state mm:00000000befcf751 type:MM_FILEPAGES val:33 [ 30.743181] BUG: Bad rss-counter state mm:00000000befcf751 type:MM_ANONPAGES val:22 [ 30.877635] ================================================================== [ 30.878748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.880007] Read of size 8 at addr ffff88800d5d3968 by task sshd/220 [ 30.880998] [ 30.881264] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.882319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.883503] Call Trace: [ 30.883864] [ 30.884143] dump_stack_lvl+0x91/0xf0 [ 30.884631] print_report+0xcc/0x620 [ 30.885107] ? __virt_addr_valid+0x102/0x340 [ 30.885651] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886883] kasan_report+0xbe/0xf0 [ 30.887360] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887975] vma_interval_tree_remove+0xc75/0xec0 [ 30.888573] vma_prepare+0xc54/0x11a0 [ 30.889042] __split_vma+0x5af/0x950 [ 30.889515] ? __pfx___split_vma+0x10/0x10 [ 30.890039] ? find_held_lock+0x2c/0x110 [ 30.890556] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.891117] ? lock_is_held_type+0x9f/0x120 [ 30.891648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.892254] ? mtree_range_walk+0x632/0x900 [ 30.892797] ? mas_walk+0x5c7/0x7c0 [ 30.893269] do_vmi_munmap+0x1f1/0x2b0 [ 30.893753] mmap_region+0x1f9/0x2660 [ 30.894232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.894764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.895482] ? __pfx_lock_acquire+0x10/0x10 [ 30.896006] ? __pfx_mmap_region+0x10/0x10 [ 30.896534] ? security_mmap_addr+0x7d/0xa0 [ 30.897066] ? get_unmapped_area+0x1f5/0x3f0 [ 30.897611] do_mmap+0x854/0xf00 [ 30.898041] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.898526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.899092] ksys_mmap_pgoff+0x3af/0x500 [ 30.899594] do_syscall_64+0x3f/0x90 [ 30.900072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900707] RIP: 0033:0x7efc9c0cdd82 [ 30.901161] 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 [ 30.903252] RSP: 002b:00007fff9aee6028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.904143] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc9c0cdd82 [ 30.904972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc9b507000 [ 30.905819] RBP: 00007efc9b507000 R08: 0000000000000009 R09: 0000000000001000 [ 30.906655] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7abdd7ec0 [ 30.907508] R13: 00007fff9aee6040 R14: 00007fff9aee6070 R15: 00007fff9aee63d0 [ 30.908372] [ 30.908663] [ 30.908879] Allocated by task 213: [ 30.909312] kasan_save_stack+0x22/0x50 [ 30.909814] kasan_set_track+0x25/0x30 [ 30.910307] __kasan_slab_alloc+0x59/0x70 [ 30.910835] kmem_cache_alloc+0x16b/0x370 [ 30.911346] vm_area_dup+0x20/0x160 [ 30.911795] __split_vma+0x170/0x950 [ 30.912254] split_vma+0xc6/0x110 [ 30.912698] mprotect_fixup+0x8d2/0xb30 [ 30.913194] do_mprotect_pkey+0x87e/0xd40 [ 30.913702] __x64_sys_mprotect+0x78/0xc0 [ 30.914221] do_syscall_64+0x3f/0x90 [ 30.914688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915350] [ 30.915568] Freed by task 213: [ 30.915954] kasan_save_stack+0x22/0x50 [ 30.916454] kasan_set_track+0x25/0x30 [ 30.916947] kasan_save_free_info+0x2b/0x50 [ 30.917472] __kasan_slab_free+0x10a/0x190 [ 30.917996] kmem_cache_free+0x10d/0x4d0 [ 30.918504] rcu_core+0x8c8/0x2860 [ 30.918953] __do_softirq+0x1b7/0x7d4 [ 30.919429] [ 30.919644] Last potentially related work creation: [ 30.920240] kasan_save_stack+0x22/0x50 [ 30.920749] __kasan_record_aux_stack+0x8e/0xa0 [ 30.921312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922045] remove_vma+0x139/0x170 [ 30.922495] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923071] do_vmi_munmap+0x1f1/0x2b0 [ 30.923547] __vm_munmap+0x138/0x3a0 [ 30.924006] __x64_sys_munmap+0x59/0x80 [ 30.924490] do_syscall_64+0x3f/0x90 [ 30.924956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925590] [ 30.925802] The buggy address belongs to the object at ffff88800d5d3910 [ 30.925802] which belongs to the cache vm_area_struct of size 168 [ 30.927262] The buggy address is located 88 bytes inside of [ 30.927262] freed 168-byte region [ffff88800d5d3910, ffff88800d5d39b8) [ 30.928651] [ 30.928864] The buggy address belongs to the physical page: [ 30.929524] page:0000000054efd0e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5d3 [ 30.930593] memcg:ffff88800d5c2c01 [ 30.931033] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.931709] page_type: 0xffffffff() [ 30.932176] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.933148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5c2c01 [ 30.934104] page dumped because: kasan: bad access detected [ 30.934833] [ 30.935061] Memory state around the buggy address: [ 30.935668] ffff88800d5d3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.936567] ffff88800d5d3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.937464] >ffff88800d5d3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.938360] ^ [ 30.939194] ffff88800d5d3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.940091] ffff88800d5d3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.940980] ================================================================== [ 30.941965] Disabling lock debugging due to kernel taint [ 33.690537] BUG: Bad rss-counter state mm:00000000da744938 type:MM_FILEPAGES val:33 [ 33.692384] BUG: Bad rss-counter state mm:00000000da744938 type:MM_ANONPAGES val:22 [ 34.182023] BUG: Bad rss-counter state mm:0000000038a95e1e type:MM_FILEPAGES val:33 [ 34.183258] BUG: Bad rss-counter state mm:0000000038a95e1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15430' (ECDSA) to the list of known hosts. 2023/06/21 10:44:35 fuzzer started 2023/06/21 10:44:35 dialing manager at localhost:36067 2023/06/21 10:44:35 checking machine... 2023/06/21 10:44:35 checking revisions... [ 34.938620] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:44:36 testing simple program... [ 35.024917] cgroup: Unknown subsys name 'net' [ 35.126756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:44:35 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f71da80d000 RCX=ffffffff81007b82 RDX=ffff88800fed1b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888016cdf4f8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f71da80d000 R11=00000000000b6a61 R12=ffff888016cdf640 R13=0000000000000000 R14=ffff88800fed1b40 R15=0000000000092c40 RIP=ffffffff814c0261 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 00007f71d99ca700 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=00007f94f25c0618 CR3=000000000cff4000 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=2035333a34343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34343a3031203132 XMM08=3d64696720303d64697520612f6e3d64 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=00007f5b01be3d10 CR3=000000000d6a8000 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=47ecd60520649a8ddf4e6840070b245e XMM02=ec2efd57dc4c00df000000000011a6d0 XMM03=ea9a5d03df610c41000000000011a7a0 XMM04=35dad1878ef38e4f00000000000ae988 XMM05=7fe54fd7a37f574b0000000000131da0 XMM06=4fda316b135da52b0000000000131a28 XMM07=e042d86d42eb936e0000000000121f38 XMM08=ea9a5d03df610c41000000000011a7a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000