syzkaller login: [ 30.775010] BUG: Bad rss-counter state mm:00000000f658c868 type:MM_FILEPAGES val:33 [ 30.776498] BUG: Bad rss-counter state mm:00000000f658c868 type:MM_ANONPAGES val:22 [ 30.955451] ================================================================== [ 30.956540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.957720] Read of size 8 at addr ffff888017f55a50 by task sshd/220 [ 30.958675] [ 30.958906] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.959789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.960801] Call Trace: [ 30.961147] [ 30.961433] dump_stack_lvl+0x91/0xf0 [ 30.961930] print_report+0xcc/0x620 [ 30.962422] ? __virt_addr_valid+0x102/0x340 [ 30.962984] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.963611] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964230] kasan_report+0xbe/0xf0 [ 30.964717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965387] vma_interval_tree_remove+0xc75/0xec0 [ 30.965998] vma_prepare+0xc54/0x11a0 [ 30.966482] __split_vma+0x5af/0x950 [ 30.966962] ? __pfx___split_vma+0x10/0x10 [ 30.967499] ? find_held_lock+0x2c/0x110 [ 30.968033] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.968607] ? lock_is_held_type+0x9f/0x120 [ 30.969205] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.969825] ? mtree_range_walk+0x632/0x900 [ 30.970386] ? mas_walk+0x5c7/0x7c0 [ 30.970869] do_vmi_munmap+0x1f1/0x2b0 [ 30.971375] mmap_region+0x1f9/0x2660 [ 30.971862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.972383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.973158] ? __pfx_lock_acquire+0x10/0x10 [ 30.973694] ? __pfx_mmap_region+0x10/0x10 [ 30.974230] ? security_mmap_addr+0x7d/0xa0 [ 30.974770] ? get_unmapped_area+0x1f5/0x3f0 [ 30.975335] do_mmap+0x854/0xf00 [ 30.975800] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.976317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.976887] ksys_mmap_pgoff+0x3af/0x500 [ 30.977426] do_syscall_64+0x3f/0x90 [ 30.977911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978567] RIP: 0033:0x7ffa9dbf1d82 [ 30.979028] 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 [ 30.981220] RSP: 002b:00007fff3bd99b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.982142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa9dbf1d82 [ 30.983019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa9d02b000 [ 30.983917] RBP: 00007ffa9d02b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.984782] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561cdd5dec0 [ 30.985693] R13: 00007fff3bd99b50 R14: 00007fff3bd99b80 R15: 00007fff3bd99ee0 [ 30.986611] [ 30.986919] [ 30.987144] Allocated by task 213: [ 30.987601] kasan_save_stack+0x22/0x50 [ 30.988174] kasan_set_track+0x25/0x30 [ 30.988699] __kasan_slab_alloc+0x59/0x70 [ 30.989275] kmem_cache_alloc+0x16b/0x370 [ 30.989820] vm_area_dup+0x20/0x160 [ 30.990295] __split_vma+0x170/0x950 [ 30.990792] split_vma+0xc6/0x110 [ 30.991260] mprotect_fixup+0x8d2/0xb30 [ 30.991828] do_mprotect_pkey+0x87e/0xd40 [ 30.992398] __x64_sys_mprotect+0x78/0xc0 [ 30.992953] do_syscall_64+0x3f/0x90 [ 30.993491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.994176] [ 30.994404] Freed by task 19: [ 30.994802] kasan_save_stack+0x22/0x50 [ 30.995336] kasan_set_track+0x25/0x30 [ 30.995899] kasan_save_free_info+0x2b/0x50 [ 30.996461] __kasan_slab_free+0x10a/0x190 [ 30.997028] kmem_cache_free+0x10d/0x4d0 [ 30.997612] rcu_core+0x8c8/0x2860 [ 30.998082] __do_softirq+0x1b7/0x7d4 [ 30.998575] [ 30.998801] Last potentially related work creation: [ 30.999429] kasan_save_stack+0x22/0x50 [ 30.999998] __kasan_record_aux_stack+0x8e/0xa0 [ 31.000618] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.001334] remove_vma+0x139/0x170 [ 31.001810] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.002401] do_vmi_munmap+0x1f1/0x2b0 [ 31.002917] __vm_munmap+0x138/0x3a0 [ 31.003411] __x64_sys_munmap+0x59/0x80 [ 31.003968] do_syscall_64+0x3f/0x90 [ 31.004475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005168] [ 31.005392] The buggy address belongs to the object at ffff888017f559f8 [ 31.005392] which belongs to the cache vm_area_struct of size 168 [ 31.006962] The buggy address is located 88 bytes inside of [ 31.006962] freed 168-byte region [ffff888017f559f8, ffff888017f55aa0) [ 31.008505] [ 31.008741] The buggy address belongs to the physical page: [ 31.009470] page:00000000a4a41059 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f55 [ 31.010624] memcg:ffff888016b3b501 [ 31.011069] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.011779] page_type: 0xffffffff() [ 31.012274] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.013273] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b3b501 [ 31.014243] page dumped because: kasan: bad access detected [ 31.014940] [ 31.015172] Memory state around the buggy address: [ 31.015814] ffff888017f55900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.016745] ffff888017f55980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.017754] >ffff888017f55a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.018661] ^ [ 31.019408] ffff888017f55a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.020353] ffff888017f55b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.021290] ================================================================== [ 31.022499] Disabling lock debugging due to kernel taint [ 33.298431] BUG: Bad rss-counter state mm:000000007fdc59a3 type:MM_FILEPAGES val:33 [ 33.299492] BUG: Bad rss-counter state mm:000000007fdc59a3 type:MM_ANONPAGES val:22 [ 33.858555] BUG: Bad rss-counter state mm:00000000fa088e21 type:MM_FILEPAGES val:33 [ 33.859723] BUG: Bad rss-counter state mm:00000000fa088e21 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22903' (ECDSA) to the list of known hosts. 2023/06/21 03:11:39 fuzzer started 2023/06/21 03:11:39 dialing manager at localhost:36067 2023/06/21 03:11:39 checking machine... 2023/06/21 03:11:39 checking revisions... [ 34.479598] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:11:39 testing simple program... [ 34.527401] cgroup: Unknown subsys name 'net' [ 34.573881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:11:39 Registers: info registers vcpu 0 RAX=1ffff11001f74f81 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880198d8000 RSI=ffffffff8162f7c0 RDI=ffff88800fba7c08 RBP=0000000000000000 RSP=ffff88800fba7b48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=4920230a2e445342 R12=0000000000000001 R13=ffff88800fba7c00 R14=ffff88800fba7e00 R15=dffffc0000000000 RIP=ffffffff8162f7d4 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 00007f24c8b97900 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=00007fff95eb9000 CR3=0000000017c6e000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007fa097312980 CR3=000000000c9fe000 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=7cba6e9cdecf9d9840417ed991335ec8 XMM02=2c67c8bc2e329bc3000000000011b568 XMM03=fb795ef6d65770560000000000121fa0 XMM04=29d65c863566219800000000000ae988 XMM05=19e9129bd510f23500000000001320e8 XMM06=b66664f6b8562c920000000000130f50 XMM07=e042d86d42eb936e0000000000122220 XMM08=847ad477b287517e000000000011b5c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000