syzkaller login: [ 41.491921] BUG: Bad rss-counter state mm:00000000ca394acf type:MM_FILEPAGES val:33 [ 41.493508] BUG: Bad rss-counter state mm:00000000ca394acf type:MM_ANONPAGES val:22 [ 41.661644] ================================================================== [ 41.662938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.664192] Read of size 8 at addr ffff88800d7f0798 by task sshd/219 [ 41.665210] [ 41.665534] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.666690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.667980] Call Trace: [ 41.668412] [ 41.668799] dump_stack_lvl+0x91/0xf0 [ 41.669451] print_report+0xcc/0x620 [ 41.670026] ? __virt_addr_valid+0x102/0x340 [ 41.670600] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.671224] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.671851] kasan_report+0xbe/0xf0 [ 41.672338] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.672965] vma_interval_tree_remove+0xc75/0xec0 [ 41.673601] vma_prepare+0xc54/0x11a0 [ 41.674093] __split_vma+0x5af/0x950 [ 41.674577] ? __pfx___split_vma+0x10/0x10 [ 41.675116] ? find_held_lock+0x2c/0x110 [ 41.675645] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.676216] ? lock_is_held_type+0x9f/0x120 [ 41.676757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.677371] ? mtree_range_walk+0x632/0x900 [ 41.677923] ? mas_walk+0x5c7/0x7c0 [ 41.678403] do_vmi_munmap+0x1f1/0x2b0 [ 41.678902] mmap_region+0x1f9/0x2660 [ 41.679395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.679918] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.680655] ? __pfx_lock_acquire+0x10/0x10 [ 41.681189] ? __pfx_mmap_region+0x10/0x10 [ 41.681743] ? security_mmap_addr+0x7d/0xa0 [ 41.682279] ? get_unmapped_area+0x1f5/0x3f0 [ 41.682829] do_mmap+0x854/0xf00 [ 41.683278] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.683779] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.684348] ksys_mmap_pgoff+0x3af/0x500 [ 41.684864] do_syscall_64+0x3f/0x90 [ 41.685345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.686015] RIP: 0033:0x7fdf4488ad82 [ 41.686481] 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 [ 41.688641] RSP: 002b:00007fffd1efc298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.689560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf4488ad82 [ 41.690418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf43cc4000 [ 41.691283] RBP: 00007fdf43cc4000 R08: 0000000000000009 R09: 0000000000001000 [ 41.692141] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623a52cbf60 [ 41.693009] R13: 00007fffd1efc2b0 R14: 00007fffd1efc2e0 R15: 00007fffd1efc640 [ 41.693888] [ 41.694193] [ 41.694417] Allocated by task 212: [ 41.694855] kasan_save_stack+0x22/0x50 [ 41.695373] kasan_set_track+0x25/0x30 [ 41.695876] __kasan_slab_alloc+0x59/0x70 [ 41.696404] kmem_cache_alloc+0x16b/0x370 [ 41.696940] vm_area_dup+0x20/0x160 [ 41.697402] __split_vma+0x170/0x950 [ 41.697870] split_vma+0xc6/0x110 [ 41.698320] mprotect_fixup+0x8d2/0xb30 [ 41.698828] do_mprotect_pkey+0x87e/0xd40 [ 41.699351] __x64_sys_mprotect+0x78/0xc0 [ 41.699883] do_syscall_64+0x3f/0x90 [ 41.700380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.701032] [ 41.701251] Freed by task 212: [ 41.701654] kasan_save_stack+0x22/0x50 [ 41.702160] kasan_set_track+0x25/0x30 [ 41.702670] kasan_save_free_info+0x2b/0x50 [ 41.703213] __kasan_slab_free+0x10a/0x190 [ 41.703759] kmem_cache_free+0x10d/0x4d0 [ 41.704275] rcu_core+0x8c8/0x2860 [ 41.704750] __do_softirq+0x1b7/0x7d4 [ 41.705240] [ 41.705459] Last potentially related work creation: [ 41.706068] kasan_save_stack+0x22/0x50 [ 41.706579] __kasan_record_aux_stack+0x8e/0xa0 [ 41.707169] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.707829] remove_vma+0x139/0x170 [ 41.708277] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.708830] do_vmi_munmap+0x1f1/0x2b0 [ 41.709312] __vm_munmap+0x138/0x3a0 [ 41.709787] __x64_sys_munmap+0x59/0x80 [ 41.710282] do_syscall_64+0x3f/0x90 [ 41.710751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.711386] [ 41.711600] The buggy address belongs to the object at ffff88800d7f0740 [ 41.711600] which belongs to the cache vm_area_struct of size 168 [ 41.713052] The buggy address is located 88 bytes inside of [ 41.713052] freed 168-byte region [ffff88800d7f0740, ffff88800d7f07e8) [ 41.714462] [ 41.714677] The buggy address belongs to the physical page: [ 41.715329] page:0000000027049dd0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7f0 [ 41.716402] memcg:ffff88800f086301 [ 41.716819] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.717456] page_type: 0xffffffff() [ 41.717907] raw: 0100000000000200 ffff88800879fc80 ffffea0000406040 dead000000000004 [ 41.718808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f086301 [ 41.719702] page dumped because: kasan: bad access detected [ 41.720359] [ 41.720570] Memory state around the buggy address: [ 41.721142] ffff88800d7f0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.721999] ffff88800d7f0700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.722843] >ffff88800d7f0780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.723693] ^ [ 41.724182] ffff88800d7f0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.725029] ffff88800d7f0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.725875] ================================================================== [ 41.726886] Disabling lock debugging due to kernel taint [ 44.081552] BUG: Bad rss-counter state mm:00000000c2ae770b type:MM_FILEPAGES val:33 [ 44.083472] BUG: Bad rss-counter state mm:00000000c2ae770b type:MM_ANONPAGES val:22 [ 44.632258] BUG: Bad rss-counter state mm:00000000083218e1 type:MM_FILEPAGES val:33 [ 44.633423] BUG: Bad rss-counter state mm:00000000083218e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22728' (ECDSA) to the list of known hosts. 2023/06/19 11:24:49 fuzzer started 2023/06/19 11:24:49 dialing manager at localhost:44161 2023/06/19 11:24:49 checking machine... 2023/06/19 11:24:49 checking revisions... [ 45.365141] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:24:49 testing simple program... [ 45.421321] cgroup: Unknown subsys name 'net' [ 45.471854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:46 Registers: info registers vcpu 0 RAX=ffffffff813782a8 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffffffff813782a8 RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000002296b R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888017de0000 R15=ffff88800f0cf200 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007f0d4d94b900 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=00007f0d4df02618 CR3=000000001c566000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000002 RDX=ffffffff87b86c40 RSI=ffffffff848ff060 RDI=ffff88800fb05980 RBP=0000000000001000 RSP=ffff88800ef5f4a8 R8 =ffff88800ef5f470 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f6f2000 R13=0000000000000000 R14=ffff88800fb059c8 R15=ffff88800fb05980 RIP=ffffffff812dfb76 RFL=00000246 [---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 00007f0d4d94b900 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=00005621de111f18 CR3=000000001c566000 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=2038343a34323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a34323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000