syzkaller login: [ 39.918784] BUG: Bad rss-counter state mm:000000000365f02a type:MM_FILEPAGES val:33 [ 39.920031] BUG: Bad rss-counter state mm:000000000365f02a type:MM_ANONPAGES val:22 [ 40.032736] ================================================================== [ 40.033668] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.034650] Read of size 8 at addr ffff88800c727310 by task sshd/220 [ 40.035452] [ 40.035679] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.036684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.037721] Call Trace: [ 40.038047] [ 40.038338] dump_stack_lvl+0x91/0xf0 [ 40.038842] print_report+0xcc/0x620 [ 40.039343] ? __virt_addr_valid+0x102/0x340 [ 40.039918] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.040550] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.041193] kasan_report+0xbe/0xf0 [ 40.041682] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.042317] vma_interval_tree_remove+0xc75/0xec0 [ 40.042948] vma_prepare+0xc54/0x11a0 [ 40.043445] __split_vma+0x5af/0x950 [ 40.043936] ? __pfx___split_vma+0x10/0x10 [ 40.044483] ? find_held_lock+0x2c/0x110 [ 40.045051] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.045644] ? lock_is_held_type+0x9f/0x120 [ 40.046204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.046835] ? mtree_range_walk+0x632/0x900 [ 40.047401] ? mas_walk+0x5c7/0x7c0 [ 40.047925] do_vmi_munmap+0x1f1/0x2b0 [ 40.048436] mmap_region+0x1f9/0x2660 [ 40.048948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.049481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.050211] ? __pfx_lock_acquire+0x10/0x10 [ 40.050767] ? __pfx_mmap_region+0x10/0x10 [ 40.051324] ? security_mmap_addr+0x7d/0xa0 [ 40.051886] ? get_unmapped_area+0x1f5/0x3f0 [ 40.052456] do_mmap+0x854/0xf00 [ 40.052922] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.053436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.054022] ksys_mmap_pgoff+0x3af/0x500 [ 40.054556] do_syscall_64+0x3f/0x90 [ 40.055058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.055728] RIP: 0033:0x7fafcf2a4d82 [ 40.056205] 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 [ 40.058438] RSP: 002b:00007ffcc6c78e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.059378] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafcf2a4d82 [ 40.060263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafce6de000 [ 40.061171] RBP: 00007fafce6de000 R08: 0000000000000009 R09: 0000000000001000 [ 40.062062] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c93a16dec0 [ 40.062963] R13: 00007ffcc6c78ea0 R14: 00007ffcc6c78ed0 R15: 00007ffcc6c79230 [ 40.063853] [ 40.064159] [ 40.064380] Allocated by task 213: [ 40.064842] kasan_save_stack+0x22/0x50 [ 40.065370] kasan_set_track+0x25/0x30 [ 40.065887] __kasan_slab_alloc+0x59/0x70 [ 40.066429] kmem_cache_alloc+0x16b/0x370 [ 40.066968] vm_area_dup+0x20/0x160 [ 40.067442] __split_vma+0x170/0x950 [ 40.067924] split_vma+0xc6/0x110 [ 40.068384] mprotect_fixup+0x8d2/0xb30 [ 40.068910] do_mprotect_pkey+0x87e/0xd40 [ 40.069434] __x64_sys_mprotect+0x78/0xc0 [ 40.069954] do_syscall_64+0x3f/0x90 [ 40.070426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.071061] [ 40.071275] Freed by task 213: [ 40.071664] kasan_save_stack+0x22/0x50 [ 40.072170] kasan_set_track+0x25/0x30 [ 40.072661] kasan_save_free_info+0x2b/0x50 [ 40.073209] __kasan_slab_free+0x10a/0x190 [ 40.073745] kmem_cache_free+0x10d/0x4d0 [ 40.074250] rcu_core+0x8c8/0x2860 [ 40.074692] __do_softirq+0x1b7/0x7d4 [ 40.075170] [ 40.075386] Last potentially related work creation: [ 40.075970] kasan_save_stack+0x22/0x50 [ 40.076473] __kasan_record_aux_stack+0x8e/0xa0 [ 40.077054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.077698] remove_vma+0x139/0x170 [ 40.078160] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.078737] do_vmi_munmap+0x1f1/0x2b0 [ 40.079252] __vm_munmap+0x138/0x3a0 [ 40.079751] __x64_sys_munmap+0x59/0x80 [ 40.080279] do_syscall_64+0x3f/0x90 [ 40.080773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.081464] [ 40.081691] Second to last potentially related work creation: [ 40.082416] kasan_save_stack+0x22/0x50 [ 40.082950] __kasan_record_aux_stack+0x8e/0xa0 [ 40.083546] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.084231] remove_vma+0x139/0x170 [ 40.084699] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.085295] do_vmi_munmap+0x1f1/0x2b0 [ 40.085805] mmap_region+0x1f9/0x2660 [ 40.086303] do_mmap+0x854/0xf00 [ 40.086756] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.087270] ksys_mmap_pgoff+0x3af/0x500 [ 40.087786] do_syscall_64+0x3f/0x90 [ 40.088272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.088955] [ 40.089182] The buggy address belongs to the object at ffff88800c7272b8 [ 40.089182] which belongs to the cache vm_area_struct of size 168 [ 40.090718] The buggy address is located 88 bytes inside of [ 40.090718] freed 168-byte region [ffff88800c7272b8, ffff88800c727360) [ 40.092176] [ 40.092401] The buggy address belongs to the physical page: [ 40.093108] page:0000000067250414 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc727 [ 40.094245] memcg:ffff88800c94a501 [ 40.094690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.095420] page_type: 0xffffffff() [ 40.095893] raw: 0100000000000200 ffff88800879fc80 ffffea0000381680 dead000000000005 [ 40.096864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c94a501 [ 40.097819] page dumped because: kasan: bad access detected [ 40.098512] [ 40.098742] Memory state around the buggy address: [ 40.099344] ffff88800c727200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 40.100242] ffff88800c727280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.101150] >ffff88800c727300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.102043] ^ [ 40.102536] ffff88800c727380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.103441] ffff88800c727400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.104344] ================================================================== [ 40.105456] Disabling lock debugging due to kernel taint [ 42.292954] BUG: Bad rss-counter state mm:00000000b626beab type:MM_FILEPAGES val:33 [ 42.294141] BUG: Bad rss-counter state mm:00000000b626beab type:MM_ANONPAGES val:22 [ 42.781716] BUG: Bad rss-counter state mm:000000004219f904 type:MM_FILEPAGES val:33 [ 42.782360] BUG: Bad rss-counter state mm:000000004219f904 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54922' (ECDSA) to the list of known hosts. 2023/06/19 22:00:27 fuzzer started 2023/06/19 22:00:27 dialing manager at localhost:44161 2023/06/19 22:00:27 checking machine... 2023/06/19 22:00:27 checking revisions... [ 43.491707] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:00:28 testing simple program... [ 43.545637] cgroup: Unknown subsys name 'net' [ 43.596178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:00:18 Registers: info registers vcpu 0 RAX=00000000d4663e82 RBX=00000000838cbee6 RCX=ffff88800eeefaa8 RDX=000000000000000c RSI=0000000000000006 RDI=000000000e27419e RBP=ffff8880087b6500 RSP=ffff88800eeef9f8 R8 =000000005977332f R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000cc0 R14=ffff88800eeefa60 R15=000000000000000c RIP=ffffffff82270eb2 RFL=00000a83 [-OS---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 00007fe821e42900 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=00007fe8223fa0b0 CR3=000000001c48c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f432d593f50 CR3=000000000f230000 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=abd5bcdb5b45059ec94f5b8ec09d91cb XMM02=000000000011c9d8ec2efd57dc4c00df XMM03=0000000000123be02dc4b7ccdc34a787 XMM04=f49f099b3dd3e68a00000000000ae988 XMM05=19e9129bd510f2350000000000134d58 XMM06=4fda316b135da52b0000000000134be0 XMM07=e042d86d42eb936e0000000000123e60 XMM08=2dc4b7ccdc34a787000000000011ca38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000