syzkaller login: [ 30.467810] BUG: Bad rss-counter state mm:000000000f99be4f type:MM_FILEPAGES val:33 [ 30.469220] BUG: Bad rss-counter state mm:000000000f99be4f type:MM_ANONPAGES val:22 [ 30.613576] ================================================================== [ 30.614480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.615411] Read of size 8 at addr ffff88800e2a24e0 by task sshd/220 [ 30.616186] [ 30.616407] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.617341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.618315] Call Trace: [ 30.618639] [ 30.618923] dump_stack_lvl+0x91/0xf0 [ 30.619418] print_report+0xcc/0x620 [ 30.619903] ? __virt_addr_valid+0x102/0x340 [ 30.620461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.621077] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.621711] kasan_report+0xbe/0xf0 [ 30.622205] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.622843] vma_interval_tree_remove+0xc75/0xec0 [ 30.623446] vma_prepare+0xc54/0x11a0 [ 30.623924] __split_vma+0x5af/0x950 [ 30.624404] ? __pfx___split_vma+0x10/0x10 [ 30.624933] ? find_held_lock+0x2c/0x110 [ 30.625482] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.626040] ? lock_is_held_type+0x9f/0x120 [ 30.626572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.627172] ? mtree_range_walk+0x632/0x900 [ 30.627726] ? mas_walk+0x5c7/0x7c0 [ 30.628200] do_vmi_munmap+0x1f1/0x2b0 [ 30.628696] mmap_region+0x1f9/0x2660 [ 30.629183] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.629699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.630421] ? __pfx_lock_acquire+0x10/0x10 [ 30.630955] ? __pfx_mmap_region+0x10/0x10 [ 30.631488] ? security_mmap_addr+0x7d/0xa0 [ 30.632014] ? get_unmapped_area+0x1f5/0x3f0 [ 30.632568] do_mmap+0x854/0xf00 [ 30.633006] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.633507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.634066] ksys_mmap_pgoff+0x3af/0x500 [ 30.634567] do_syscall_64+0x3f/0x90 [ 30.635046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.635687] RIP: 0033:0x7f142974ed82 [ 30.636136] 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 [ 30.638264] RSP: 002b:00007ffebeb17268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.639182] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f142974ed82 [ 30.640057] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1428b88000 [ 30.640943] RBP: 00007f1428b88000 R08: 0000000000000009 R09: 0000000000001000 [ 30.641794] R10: 0000000000000812 R11: 0000000000000206 R12: 000056477926bec0 [ 30.642633] R13: 00007ffebeb17280 R14: 00007ffebeb172b0 R15: 00007ffebeb17610 [ 30.643482] [ 30.643770] [ 30.643983] Allocated by task 213: [ 30.644406] kasan_save_stack+0x22/0x50 [ 30.644911] kasan_set_track+0x25/0x30 [ 30.645426] __kasan_slab_alloc+0x59/0x70 [ 30.645961] kmem_cache_alloc+0x16b/0x370 [ 30.646505] vm_area_dup+0x20/0x160 [ 30.646967] __split_vma+0x170/0x950 [ 30.647450] split_vma+0xc6/0x110 [ 30.647884] mprotect_fixup+0x8d2/0xb30 [ 30.648379] do_mprotect_pkey+0x87e/0xd40 [ 30.648901] __x64_sys_mprotect+0x78/0xc0 [ 30.649440] do_syscall_64+0x3f/0x90 [ 30.649910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.650554] [ 30.650771] Freed by task 213: [ 30.651164] kasan_save_stack+0x22/0x50 [ 30.651664] kasan_set_track+0x25/0x30 [ 30.652151] kasan_save_free_info+0x2b/0x50 [ 30.652679] __kasan_slab_free+0x10a/0x190 [ 30.653210] kmem_cache_free+0x10d/0x4d0 [ 30.653713] rcu_core+0x8c8/0x2860 [ 30.654151] __do_softirq+0x1b7/0x7d4 [ 30.654632] [ 30.654845] Last potentially related work creation: [ 30.655422] kasan_save_stack+0x22/0x50 [ 30.655921] __kasan_record_aux_stack+0x8e/0xa0 [ 30.656491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.657132] remove_vma+0x139/0x170 [ 30.657608] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.658222] do_vmi_munmap+0x1f1/0x2b0 [ 30.658718] __vm_munmap+0x138/0x3a0 [ 30.659186] __x64_sys_munmap+0x59/0x80 [ 30.659681] do_syscall_64+0x3f/0x90 [ 30.660154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.660805] [ 30.661022] The buggy address belongs to the object at ffff88800e2a2488 [ 30.661022] which belongs to the cache vm_area_struct of size 168 [ 30.662506] The buggy address is located 88 bytes inside of [ 30.662506] freed 168-byte region [ffff88800e2a2488, ffff88800e2a2530) [ 30.663891] [ 30.664112] The buggy address belongs to the physical page: [ 30.664773] page:00000000b8284da5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2a2 [ 30.665859] memcg:ffff888019c53c01 [ 30.666283] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.666926] page_type: 0xffffffff() [ 30.667375] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.668285] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c53c01 [ 30.669189] page dumped because: kasan: bad access detected [ 30.669845] [ 30.670057] Memory state around the buggy address: [ 30.670634] ffff88800e2a2380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.671482] ffff88800e2a2400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.672327] >ffff88800e2a2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.673192] ^ [ 30.673952] ffff88800e2a2500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.674813] ffff88800e2a2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.675663] ================================================================== [ 30.676638] Disabling lock debugging due to kernel taint [ 32.670006] BUG: Bad rss-counter state mm:000000009796c764 type:MM_FILEPAGES val:33 [ 32.671259] BUG: Bad rss-counter state mm:000000009796c764 type:MM_ANONPAGES val:22 [ 33.219367] BUG: Bad rss-counter state mm:0000000081851314 type:MM_FILEPAGES val:33 [ 33.220561] BUG: Bad rss-counter state mm:0000000081851314 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64737' (ECDSA) to the list of known hosts. 2023/06/20 21:51:03 fuzzer started 2023/06/20 21:51:03 dialing manager at localhost:36067 2023/06/20 21:51:03 checking machine... 2023/06/20 21:51:03 checking revisions... [ 33.872506] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:51:03 testing simple program... [ 33.923575] cgroup: Unknown subsys name 'net' [ 33.962950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:51:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd5bc0edd8 CR3=0000000005482000 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=00007f308174d51000005629cc520790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf2c240 RCX=0000000000000000 RDX=1ffffffff0a81e40 RSI=ffffffff813fc14b RDI=0000000000000004 RBP=00000007b09f7961 RSP=ffff88806cf09dd8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=00000000fffbec54 R13=00000000fffbec53 R14=ffffffff8540f200 R15=ffff88806cf2c248 RIP=ffffffff813fc197 RFL=00000046 [---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 00007f638e3a6900 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=00007f638e95e0b0 CR3=0000000016542000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000