syzkaller login: [ 40.607329] BUG: Bad rss-counter state mm:000000001e1b0362 type:MM_FILEPAGES val:33 [ 40.608800] BUG: Bad rss-counter state mm:000000001e1b0362 type:MM_ANONPAGES val:22 [ 40.653852] ================================================================== [ 40.654947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.656017] Read of size 8 at addr ffff888016b8d798 by task sshd/227 [ 40.656892] [ 40.657115] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.657976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.658954] Call Trace: [ 40.659275] [ 40.659586] dump_stack_lvl+0x91/0xf0 [ 40.660073] print_report+0xcc/0x620 [ 40.660559] ? __virt_addr_valid+0x102/0x340 [ 40.661105] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.661724] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.662339] kasan_report+0xbe/0xf0 [ 40.662813] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.663441] vma_interval_tree_remove+0xc75/0xec0 [ 40.664045] vma_prepare+0xc54/0x11a0 [ 40.664533] __split_vma+0x5af/0x950 [ 40.665006] ? __pfx___split_vma+0x10/0x10 [ 40.665537] ? find_held_lock+0x2c/0x110 [ 40.666052] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.666615] ? lock_is_held_type+0x9f/0x120 [ 40.667153] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.667764] ? mtree_range_walk+0x632/0x900 [ 40.668316] ? mas_walk+0x5c7/0x7c0 [ 40.668788] do_vmi_munmap+0x1f1/0x2b0 [ 40.669288] mmap_region+0x1f9/0x2660 [ 40.669768] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.670282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.670992] ? __pfx_lock_acquire+0x10/0x10 [ 40.671541] ? __pfx_mmap_region+0x10/0x10 [ 40.672063] ? security_mmap_addr+0x7d/0xa0 [ 40.672597] ? get_unmapped_area+0x1f5/0x3f0 [ 40.673141] do_mmap+0x854/0xf00 [ 40.673572] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.674071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.674627] ksys_mmap_pgoff+0x3af/0x500 [ 40.675129] do_syscall_64+0x3f/0x90 [ 40.675610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.676249] RIP: 0033:0x7fb659b64d82 [ 40.676705] 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 [ 40.678805] RSP: 002b:00007ffc3b18a278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.679727] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb659b64d82 [ 40.680569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb658f9e000 [ 40.681413] RBP: 00007fb658f9e000 R08: 0000000000000009 R09: 0000000000001000 [ 40.682252] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7678d6ec0 [ 40.683091] R13: 00007ffc3b18a290 R14: 00007ffc3b18a2c0 R15: 00007ffc3b18a620 [ 40.683949] [ 40.684247] [ 40.684462] Allocated by task 220: [ 40.684892] kasan_save_stack+0x22/0x50 [ 40.685401] kasan_set_track+0x25/0x30 [ 40.685892] __kasan_slab_alloc+0x59/0x70 [ 40.686415] kmem_cache_alloc+0x16b/0x370 [ 40.686932] vm_area_dup+0x20/0x160 [ 40.687400] __split_vma+0x170/0x950 [ 40.687940] split_vma+0xc6/0x110 [ 40.688387] mprotect_fixup+0x8d2/0xb30 [ 40.688890] do_mprotect_pkey+0x87e/0xd40 [ 40.689415] __x64_sys_mprotect+0x78/0xc0 [ 40.689936] do_syscall_64+0x3f/0x90 [ 40.690407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.691040] [ 40.691260] Freed by task 220: [ 40.691659] kasan_save_stack+0x22/0x50 [ 40.692163] kasan_set_track+0x25/0x30 [ 40.692660] kasan_save_free_info+0x2b/0x50 [ 40.693195] __kasan_slab_free+0x10a/0x190 [ 40.693731] kmem_cache_free+0x10d/0x4d0 [ 40.694243] rcu_core+0x8c8/0x2860 [ 40.694691] __do_softirq+0x1b7/0x7d4 [ 40.695168] [ 40.695409] Last potentially related work creation: [ 40.695991] kasan_save_stack+0x22/0x50 [ 40.696500] __kasan_record_aux_stack+0x8e/0xa0 [ 40.697076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.697720] remove_vma+0x139/0x170 [ 40.698172] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.698735] do_vmi_munmap+0x1f1/0x2b0 [ 40.699218] __vm_munmap+0x138/0x3a0 [ 40.699689] __x64_sys_munmap+0x59/0x80 [ 40.700190] do_syscall_64+0x3f/0x90 [ 40.700665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.701308] [ 40.701527] The buggy address belongs to the object at ffff888016b8d740 [ 40.701527] which belongs to the cache vm_area_struct of size 168 [ 40.703003] The buggy address is located 88 bytes inside of [ 40.703003] freed 168-byte region [ffff888016b8d740, ffff888016b8d7e8) [ 40.704415] [ 40.704631] The buggy address belongs to the physical page: [ 40.705274] page:0000000072ea0e0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b8d [ 40.706359] memcg:ffff88800fd2aa01 [ 40.706783] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.707432] page_type: 0xffffffff() [ 40.707886] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.708796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd2aa01 [ 40.709695] page dumped because: kasan: bad access detected [ 40.710355] [ 40.710573] Memory state around the buggy address: [ 40.711148] ffff888016b8d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.712012] ffff888016b8d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.712873] >ffff888016b8d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.713729] ^ [ 40.714223] ffff888016b8d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.715071] ffff888016b8d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.715935] ================================================================== [ 40.716868] Disabling lock debugging due to kernel taint [ 43.590724] BUG: Bad rss-counter state mm:000000007f927337 type:MM_FILEPAGES val:33 [ 43.592170] BUG: Bad rss-counter state mm:000000007f927337 type:MM_ANONPAGES val:22 [ 44.244594] BUG: Bad rss-counter state mm:00000000ab609987 type:MM_FILEPAGES val:33 [ 44.245852] BUG: Bad rss-counter state mm:00000000ab609987 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47224' (ECDSA) to the list of known hosts. 2023/06/19 19:37:04 fuzzer started 2023/06/19 19:37:04 dialing manager at localhost:44161 2023/06/19 19:37:04 checking machine... 2023/06/19 19:37:04 checking revisions... [ 44.903030] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:37:04 testing simple program... [ 44.953975] cgroup: Unknown subsys name 'net' [ 45.003227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:02 Registers: info registers vcpu 0 RAX=0000000080080783 RBX=ffff88800f578000 RCX=0000000000000100 RDX=ffffc90000660000 RSI=ffffffff8301b27f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce097f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800f579428 R14=ffff88800f579040 R15=000000000000000a RIP=ffffffff8301b2b6 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 00007f505b0e2900 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=0000563ea1a4e218 CR3=000000000d5c8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=779f9d97c86d6eff00000000000ae988 XMM05=1319e678c5640f8a0000000000134de0 XMM06=405749d8372a36f10000000000134d48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81668862 RDX=ffff88800fc73680 RSI=0000000000000008 RDI=ffffea00005b0f80 RBP=ffffea00005b0f80 RSP=ffff888017eaf908 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d5a5e80 R13=00007ff8c7233000 R14=ffff88800fdd8190 R15=dffffc0000000000 RIP=ffffffff8180fd28 RFL=00000293 [--S-A-C] 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 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=0000557dcd12d040 CR3=000000000c958000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=5f65676e61686378655f78656b203a72 XMM04=000000300000002800007ff8c7157b6b XMM05=00007ffdaf33b96000007ffdaf33ba20 XMM06=0000557dcf12bfe0e5abf45d57069f00 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=f1ae70f3b593b355508c0132662801da XMM11=f6b565626617696be7722f5ac2ba5a70 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000