syzkaller login: [ 31.461632] BUG: Bad rss-counter state mm:0000000014f81fbf type:MM_FILEPAGES val:33 [ 31.462808] BUG: Bad rss-counter state mm:0000000014f81fbf type:MM_ANONPAGES val:22 [ 31.631376] ================================================================== [ 31.632304] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.633260] Read of size 8 at addr ffff88800f267228 by task sshd/221 [ 31.634029] [ 31.634369] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.635264] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.636277] Call Trace: [ 31.636615] [ 31.636905] dump_stack_lvl+0x91/0xf0 [ 31.637406] print_report+0xcc/0x620 [ 31.637885] ? __virt_addr_valid+0x102/0x340 [ 31.638444] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.639092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.639729] kasan_report+0xbe/0xf0 [ 31.640229] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.640858] vma_interval_tree_remove+0xc75/0xec0 [ 31.641457] vma_prepare+0xc54/0x11a0 [ 31.641945] __split_vma+0x5af/0x950 [ 31.642417] ? __pfx___split_vma+0x10/0x10 [ 31.642962] ? find_held_lock+0x2c/0x110 [ 31.643488] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.644053] ? lock_is_held_type+0x9f/0x120 [ 31.644588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.645194] ? mtree_range_walk+0x632/0x900 [ 31.645749] ? mas_walk+0x5c7/0x7c0 [ 31.646222] do_vmi_munmap+0x1f1/0x2b0 [ 31.646728] mmap_region+0x1f9/0x2660 [ 31.647220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.647735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.648456] ? __pfx_lock_acquire+0x10/0x10 [ 31.648984] ? __pfx_mmap_region+0x10/0x10 [ 31.649510] ? security_mmap_addr+0x7d/0xa0 [ 31.650043] ? get_unmapped_area+0x1f5/0x3f0 [ 31.650594] do_mmap+0x854/0xf00 [ 31.651040] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.651530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.652097] ksys_mmap_pgoff+0x3af/0x500 [ 31.652600] do_syscall_64+0x3f/0x90 [ 31.653083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.653727] RIP: 0033:0x7f1ef7c38d82 [ 31.654184] 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 [ 31.656309] RSP: 002b:00007fff4dc2e4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.657210] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ef7c38d82 [ 31.658051] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ef7072000 [ 31.658920] RBP: 00007f1ef7072000 R08: 0000000000000009 R09: 0000000000001000 [ 31.659765] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d76bacdd90 [ 31.660611] R13: 00007fff4dc2e4e0 R14: 00007fff4dc2e510 R15: 00007fff4dc2e870 [ 31.661470] [ 31.661763] [ 31.661982] Allocated by task 214: [ 31.662411] kasan_save_stack+0x22/0x50 [ 31.662924] kasan_set_track+0x25/0x30 [ 31.663417] __kasan_slab_alloc+0x59/0x70 [ 31.663947] kmem_cache_alloc+0x16b/0x370 [ 31.664469] vm_area_dup+0x20/0x160 [ 31.664922] __split_vma+0x170/0x950 [ 31.665388] split_vma+0xc6/0x110 [ 31.665836] mprotect_fixup+0x8d2/0xb30 [ 31.666351] do_mprotect_pkey+0x87e/0xd40 [ 31.666897] __x64_sys_mprotect+0x78/0xc0 [ 31.667435] do_syscall_64+0x3f/0x90 [ 31.667928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.668588] [ 31.668811] Freed by task 214: [ 31.669209] kasan_save_stack+0x22/0x50 [ 31.669740] kasan_set_track+0x25/0x30 [ 31.670258] kasan_save_free_info+0x2b/0x50 [ 31.670824] __kasan_slab_free+0x10a/0x190 [ 31.671367] kmem_cache_free+0x10d/0x4d0 [ 31.671894] rcu_core+0x8c8/0x2860 [ 31.672348] __do_softirq+0x1b7/0x7d4 [ 31.672846] [ 31.673067] Last potentially related work creation: [ 31.673668] kasan_save_stack+0x22/0x50 [ 31.674172] __kasan_record_aux_stack+0x8e/0xa0 [ 31.674752] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.675399] remove_vma+0x139/0x170 [ 31.675856] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.676414] do_vmi_munmap+0x1f1/0x2b0 [ 31.676906] __vm_munmap+0x138/0x3a0 [ 31.677376] __x64_sys_munmap+0x59/0x80 [ 31.677878] do_syscall_64+0x3f/0x90 [ 31.678353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.679023] [ 31.679242] The buggy address belongs to the object at ffff88800f2671d0 [ 31.679242] which belongs to the cache vm_area_struct of size 168 [ 31.680727] The buggy address is located 88 bytes inside of [ 31.680727] freed 168-byte region [ffff88800f2671d0, ffff88800f267278) [ 31.682205] [ 31.682427] The buggy address belongs to the physical page: [ 31.683108] page:0000000012dfb513 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf267 [ 31.684234] memcg:ffff88800cb0a601 [ 31.684683] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.685414] page_type: 0xffffffff() [ 31.685896] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2640 dead000000000005 [ 31.686879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb0a601 [ 31.687790] page dumped because: kasan: bad access detected [ 31.688461] [ 31.688680] Memory state around the buggy address: [ 31.689280] ffff88800f267100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.690152] ffff88800f267180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.691028] >ffff88800f267200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.691892] ^ [ 31.692448] ffff88800f267280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.693304] ffff88800f267300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.694191] ================================================================== [ 31.695238] Disabling lock debugging due to kernel taint [ 33.678018] BUG: Bad rss-counter state mm:00000000984b4507 type:MM_FILEPAGES val:33 [ 33.679040] BUG: Bad rss-counter state mm:00000000984b4507 type:MM_ANONPAGES val:22 [ 34.170775] BUG: Bad rss-counter state mm:0000000013961952 type:MM_FILEPAGES val:33 [ 34.171980] BUG: Bad rss-counter state mm:0000000013961952 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39817' (ECDSA) to the list of known hosts. 2023/06/20 07:15:33 fuzzer started 2023/06/20 07:15:34 dialing manager at localhost:44161 2023/06/20 07:15:34 checking machine... 2023/06/20 07:15:34 checking revisions... [ 34.829293] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:15:34 testing simple program... [ 34.877121] cgroup: Unknown subsys name 'net' [ 34.928544] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:33 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=00000000000361a0 RCX=0000000000000000 RDX=0000000000000004 RSI=0000000000000000 RDI=ffffffff81839780 RBP=ffff88800f308300 RSP=ffff88800f5efc10 R8 =0000000000000000 R9 =ffffffff87b67200 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000005 R14=0000000000000180 R15=ffff88806ce361a0 RIP=ffffffff818397e6 RFL=00000097 [--S-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 00007fcf03101900 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=00007fcf036b6650 CR3=000000000e050000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000202 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=ffff88800e2215f0 RSP=ffff88800f5efd38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800e221680 R13=ffff88800e221630 R14=ffffffff81ef13be R15=ffff88800c9bb080 RIP=ffffffff8450b8ab 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 00007fcf03101900 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=00007fcf036b90b0 CR3=000000000e050000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000