syzkaller login: [ 35.771354] BUG: Bad rss-counter state mm:000000002c553374 type:MM_FILEPAGES val:33 [ 35.772932] BUG: Bad rss-counter state mm:000000002c553374 type:MM_ANONPAGES val:22 [ 35.937245] ================================================================== [ 35.938168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.939117] Read of size 8 at addr ffff888013633a50 by task sshd/220 [ 35.939906] [ 35.940132] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.941139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.942117] Call Trace: [ 35.942445] [ 35.942752] dump_stack_lvl+0x91/0xf0 [ 35.943249] print_report+0xcc/0x620 [ 35.943749] ? __virt_addr_valid+0x102/0x340 [ 35.944311] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.944937] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.945559] kasan_report+0xbe/0xf0 [ 35.946065] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.946717] vma_interval_tree_remove+0xc75/0xec0 [ 35.947351] vma_prepare+0xc54/0x11a0 [ 35.947846] __split_vma+0x5af/0x950 [ 35.948357] ? __pfx___split_vma+0x10/0x10 [ 35.948918] ? find_held_lock+0x2c/0x110 [ 35.949468] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.950065] ? lock_is_held_type+0x9f/0x120 [ 35.950628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.951272] ? mtree_range_walk+0x632/0x900 [ 35.951847] ? mas_walk+0x5c7/0x7c0 [ 35.952368] do_vmi_munmap+0x1f1/0x2b0 [ 35.952897] mmap_region+0x1f9/0x2660 [ 35.953405] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.953947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.954711] ? __pfx_lock_acquire+0x10/0x10 [ 35.955271] ? __pfx_mmap_region+0x10/0x10 [ 35.955830] ? security_mmap_addr+0x7d/0xa0 [ 35.956405] ? get_unmapped_area+0x1f5/0x3f0 [ 35.956987] do_mmap+0x854/0xf00 [ 35.957455] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.957976] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.958568] ksys_mmap_pgoff+0x3af/0x500 [ 35.959095] do_syscall_64+0x3f/0x90 [ 35.959589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.960281] RIP: 0033:0x7f39d5f1dd82 [ 35.960763] 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 [ 35.963043] RSP: 002b:00007ffed98a5588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.964060] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39d5f1dd82 [ 35.964951] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39d5357000 [ 35.965847] RBP: 00007f39d5357000 R08: 0000000000000009 R09: 0000000000001000 [ 35.966743] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c9f82db20 [ 35.967642] R13: 00007ffed98a55a0 R14: 00007ffed98a55d0 R15: 00007ffed98a5930 [ 35.968548] [ 35.968860] [ 35.969084] Allocated by task 213: [ 35.969529] kasan_save_stack+0x22/0x50 [ 35.970063] kasan_set_track+0x25/0x30 [ 35.970580] __kasan_slab_alloc+0x59/0x70 [ 35.971131] kmem_cache_alloc+0x16b/0x370 [ 35.971673] vm_area_dup+0x20/0x160 [ 35.972156] __split_vma+0x170/0x950 [ 35.972650] split_vma+0xc6/0x110 [ 35.973120] mprotect_fixup+0x8d2/0xb30 [ 35.973650] do_mprotect_pkey+0x87e/0xd40 [ 35.974197] __x64_sys_mprotect+0x78/0xc0 [ 35.974746] do_syscall_64+0x3f/0x90 [ 35.975252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.975949] [ 35.976182] Freed by task 203: [ 35.976591] kasan_save_stack+0x22/0x50 [ 35.977129] kasan_set_track+0x25/0x30 [ 35.977648] kasan_save_free_info+0x2b/0x50 [ 35.978212] __kasan_slab_free+0x10a/0x190 [ 35.978773] kmem_cache_free+0x10d/0x4d0 [ 35.979312] rcu_core+0x8c8/0x2860 [ 35.979780] __do_softirq+0x1b7/0x7d4 [ 35.980292] [ 35.980517] Last potentially related work creation: [ 35.981140] kasan_save_stack+0x22/0x50 [ 35.981684] __kasan_record_aux_stack+0x8e/0xa0 [ 35.982284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.982972] remove_vma+0x139/0x170 [ 35.983448] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.984055] do_vmi_munmap+0x1f1/0x2b0 [ 35.984565] __vm_munmap+0x138/0x3a0 [ 35.985054] __x64_sys_munmap+0x59/0x80 [ 35.985574] do_syscall_64+0x3f/0x90 [ 35.986066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.986737] [ 35.986963] The buggy address belongs to the object at ffff8880136339f8 [ 35.986963] which belongs to the cache vm_area_struct of size 168 [ 35.988542] The buggy address is located 88 bytes inside of [ 35.988542] freed 168-byte region [ffff8880136339f8, ffff888013633aa0) [ 35.990033] [ 35.990262] The buggy address belongs to the physical page: [ 35.990958] page:00000000945e7590 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13633 [ 35.992113] memcg:ffff88800e992501 [ 35.992569] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.993257] page_type: 0xffffffff() [ 35.993735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.994718] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e992501 [ 35.995685] page dumped because: kasan: bad access detected [ 35.996406] [ 35.996634] Memory state around the buggy address: [ 35.997240] ffff888013633900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.998161] ffff888013633980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.999065] >ffff888013633a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.999973] ^ [ 36.000715] ffff888013633a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.001629] ffff888013633b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.002527] ================================================================== [ 36.003494] Disabling lock debugging due to kernel taint [ 37.987428] BUG: Bad rss-counter state mm:000000007f8c2932 type:MM_FILEPAGES val:33 [ 37.988416] BUG: Bad rss-counter state mm:000000007f8c2932 type:MM_ANONPAGES val:22 [ 38.519895] BUG: Bad rss-counter state mm:00000000f7fd6e98 type:MM_FILEPAGES val:33 [ 38.520974] BUG: Bad rss-counter state mm:00000000f7fd6e98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35042' (ECDSA) to the list of known hosts. 2023/06/19 18:06:24 fuzzer started 2023/06/19 18:06:24 dialing manager at localhost:44161 2023/06/19 18:06:24 checking machine... 2023/06/19 18:06:24 checking revisions... [ 39.260674] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:06:24 testing simple program... [ 39.317461] cgroup: Unknown subsys name 'net' [ 39.367415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:06:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f0ab79d8cb0 CR3=000000000ff8e000 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=491306f9b22799a6bc4bfe9ed1a7090c XMM02=000000000011ce58d59e07bde36eea69 XMM03=000000000011cf80ec2efd57dc4c00df XMM04=f046b78847dc07a300000000000ae988 XMM05=c31b041fc77670ae0000000000135218 XMM06=4fda316b135da52b00000000001342b8 XMM07=fb795ef6d657705600000000001248c8 XMM08=2c67c8bc2e329bc3000000000011cf80 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffffffde8 RBX=000055d9aaa0b7b6 RCX=0000000000000000 RDX=000000000000000a RSI=00007ffdfa7415c0 RDI=000055d9aaa0b7b8 RBP=000055d9aaa0b780 RSP=00007ffdfa7415b8 R8 =0000000000000000 R9 =0000000000000000 R10=00007f3904d83ac0 R11=00007f3904d843c0 R12=00007ffdfa7415c0 R13=000055d9aaa0b7b8 R14=0000000000000400 R15=0000000000000400 RIP=00007f3904c524b7 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f390481e900 00000000 00000000 GS =0000 0000000000000000 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=00007f3904dd60b0 CR3=000000000eef8000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=ffff0000000000000000000000000000 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000