syzkaller login: [ 30.841547] BUG: Bad rss-counter state mm:000000000ed69022 type:MM_FILEPAGES val:33 [ 30.842704] BUG: Bad rss-counter state mm:000000000ed69022 type:MM_ANONPAGES val:22 [ 31.003584] ================================================================== [ 31.004515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.005452] Read of size 8 at addr ffff88800e37aa50 by task sshd/221 [ 31.006220] [ 31.006532] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.007404] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.008402] Call Trace: [ 31.008734] [ 31.009022] dump_stack_lvl+0x91/0xf0 [ 31.009523] print_report+0xcc/0x620 [ 31.010007] ? __virt_addr_valid+0x102/0x340 [ 31.010574] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.011858] kasan_report+0xbe/0xf0 [ 31.012341] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.012976] vma_interval_tree_remove+0xc75/0xec0 [ 31.013578] vma_prepare+0xc54/0x11a0 [ 31.014071] __split_vma+0x5af/0x950 [ 31.014555] ? __pfx___split_vma+0x10/0x10 [ 31.015088] ? find_held_lock+0x2c/0x110 [ 31.015632] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.016205] ? lock_is_held_type+0x9f/0x120 [ 31.016753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.017361] ? mtree_range_walk+0x632/0x900 [ 31.017911] ? mas_walk+0x5c7/0x7c0 [ 31.018387] do_vmi_munmap+0x1f1/0x2b0 [ 31.018887] mmap_region+0x1f9/0x2660 [ 31.019367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.019893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.020609] ? __pfx_lock_acquire+0x10/0x10 [ 31.021139] ? __pfx_mmap_region+0x10/0x10 [ 31.021669] ? security_mmap_addr+0x7d/0xa0 [ 31.022203] ? get_unmapped_area+0x1f5/0x3f0 [ 31.022754] do_mmap+0x854/0xf00 [ 31.023190] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.023711] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.024268] ksys_mmap_pgoff+0x3af/0x500 [ 31.024769] do_syscall_64+0x3f/0x90 [ 31.025244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.025881] RIP: 0033:0x7f06b2fedd82 [ 31.026335] 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 [ 31.028470] RSP: 002b:00007fff07f34f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.029379] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06b2fedd82 [ 31.030219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06b2427000 [ 31.031059] RBP: 00007f06b2427000 R08: 0000000000000009 R09: 0000000000001000 [ 31.031907] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e4aad2ec0 [ 31.032765] R13: 00007fff07f34f40 R14: 00007fff07f34f70 R15: 00007fff07f352d0 [ 31.033616] [ 31.033913] [ 31.034129] Allocated by task 214: [ 31.034563] kasan_save_stack+0x22/0x50 [ 31.035062] kasan_set_track+0x25/0x30 [ 31.035572] __kasan_slab_alloc+0x59/0x70 [ 31.036094] kmem_cache_alloc+0x16b/0x370 [ 31.036613] vm_area_dup+0x20/0x160 [ 31.037069] __split_vma+0x170/0x950 [ 31.037535] split_vma+0xc6/0x110 [ 31.037985] mprotect_fixup+0x8d2/0xb30 [ 31.038485] do_mprotect_pkey+0x87e/0xd40 [ 31.039005] __x64_sys_mprotect+0x78/0xc0 [ 31.039530] do_syscall_64+0x3f/0x90 [ 31.040013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.040654] [ 31.040870] Freed by task 214: [ 31.041256] kasan_save_stack+0x22/0x50 [ 31.041760] kasan_set_track+0x25/0x30 [ 31.042258] kasan_save_free_info+0x2b/0x50 [ 31.042787] __kasan_slab_free+0x10a/0x190 [ 31.043322] kmem_cache_free+0x10d/0x4d0 [ 31.043845] rcu_core+0x8c8/0x2860 [ 31.044286] __do_softirq+0x1b7/0x7d4 [ 31.044767] [ 31.044983] Last potentially related work creation: [ 31.045568] kasan_save_stack+0x22/0x50 [ 31.046072] __kasan_record_aux_stack+0x8e/0xa0 [ 31.046638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.047285] remove_vma+0x139/0x170 [ 31.047757] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.048309] do_vmi_munmap+0x1f1/0x2b0 [ 31.048793] __vm_munmap+0x138/0x3a0 [ 31.049265] __x64_sys_munmap+0x59/0x80 [ 31.049760] do_syscall_64+0x3f/0x90 [ 31.050235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.050880] [ 31.051099] The buggy address belongs to the object at ffff88800e37a9f8 [ 31.051099] which belongs to the cache vm_area_struct of size 168 [ 31.052558] The buggy address is located 88 bytes inside of [ 31.052558] freed 168-byte region [ffff88800e37a9f8, ffff88800e37aaa0) [ 31.053948] [ 31.054160] The buggy address belongs to the physical page: [ 31.054817] page:000000000c9b928f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe37a [ 31.055926] memcg:ffff88801b496b01 [ 31.056351] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.056992] page_type: 0xffffffff() [ 31.057442] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.058350] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b496b01 [ 31.059245] page dumped because: kasan: bad access detected [ 31.059911] [ 31.060130] Memory state around the buggy address: [ 31.060704] ffff88800e37a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.061559] ffff88800e37a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.062411] >ffff88800e37aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.063260] ^ [ 31.063964] ffff88800e37aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.064816] ffff88800e37ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.065653] ================================================================== [ 31.066728] Disabling lock debugging due to kernel taint [ 33.067353] BUG: Bad rss-counter state mm:000000002dff108a type:MM_FILEPAGES val:33 [ 33.068528] BUG: Bad rss-counter state mm:000000002dff108a type:MM_ANONPAGES val:22 [ 33.498497] BUG: Bad rss-counter state mm:00000000796ec36b type:MM_FILEPAGES val:33 [ 33.499723] BUG: Bad rss-counter state mm:00000000796ec36b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56847' (ECDSA) to the list of known hosts. 2023/06/20 23:29:07 fuzzer started 2023/06/20 23:29:07 dialing manager at localhost:36067 2023/06/20 23:29:07 checking machine... 2023/06/20 23:29:07 checking revisions... [ 34.212153] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:29:07 testing simple program... [ 34.260913] cgroup: Unknown subsys name 'net' [ 34.333931] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:29:07 Registers: info registers vcpu 0 RAX=1ffff110013b8969 RBX=ffff888009dc4b18 RCX=1ffff110013abdb6 RDX=dffffc0000000000 RSI=ffff888008c68e50 RDI=ffff888009dc4b48 RBP=ffff888008ccbeb8 RSP=ffff888016817a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888008c68c80 R13=0000000000000000 R14=ffff8880098fc9c8 R15=ffff8880098fc980 RIP=ffffffff8184767e 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 00007f83ad4a6900 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=00007f83ada5e0b0 CR3=000000000f29a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f79335137c0 CR3=000000000c538000 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=4272a58751fd1eb1014c50f47072712f XMM02=000000000011ccc8ec2efd57dc4c00df XMM03=0000000000121498b2a6ddf243d2b619 XMM04=59fb4b1793707b4a00000000000ae988 XMM05=2f0cefb8b4489dcf00000000001320c0 XMM06=c291bd5c70af25b90000000000131160 XMM07=e042d86d42eb936e0000000000121718 XMM08=b2a6ddf243d2b619000000000011cd28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000