syzkaller login: [ 40.427336] BUG: Bad rss-counter state mm:0000000001833fee type:MM_FILEPAGES val:33 [ 40.428541] BUG: Bad rss-counter state mm:0000000001833fee type:MM_ANONPAGES val:22 [ 40.466937] ================================================================== [ 40.467842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.468800] Read of size 8 at addr ffff8880199fbed8 by task sshd/220 [ 40.469617] [ 40.469878] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.470764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.471743] Call Trace: [ 40.472063] [ 40.472353] dump_stack_lvl+0x91/0xf0 [ 40.472853] print_report+0xcc/0x620 [ 40.473338] ? __virt_addr_valid+0x102/0x340 [ 40.473895] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.474520] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.475152] kasan_report+0xbe/0xf0 [ 40.475632] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.476270] vma_interval_tree_remove+0xc75/0xec0 [ 40.476868] vma_prepare+0xc54/0x11a0 [ 40.477348] __split_vma+0x5af/0x950 [ 40.477820] ? __pfx___split_vma+0x10/0x10 [ 40.478347] ? find_held_lock+0x2c/0x110 [ 40.478884] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.479447] ? lock_is_held_type+0x9f/0x120 [ 40.479982] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.480589] ? mtree_range_walk+0x632/0x900 [ 40.481139] ? mas_walk+0x5c7/0x7c0 [ 40.481613] do_vmi_munmap+0x1f1/0x2b0 [ 40.482108] mmap_region+0x1f9/0x2660 [ 40.482601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.483112] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.483824] ? __pfx_lock_acquire+0x10/0x10 [ 40.484365] ? __pfx_mmap_region+0x10/0x10 [ 40.484892] ? security_mmap_addr+0x7d/0xa0 [ 40.485430] ? get_unmapped_area+0x1f5/0x3f0 [ 40.485977] do_mmap+0x854/0xf00 [ 40.486418] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.486937] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.487501] ksys_mmap_pgoff+0x3af/0x500 [ 40.488010] do_syscall_64+0x3f/0x90 [ 40.488492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.489136] RIP: 0033:0x7f6abbc15d82 [ 40.489590] 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 [ 40.491705] RSP: 002b:00007ffe6c729628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.492613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6abbc15d82 [ 40.493469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6abb04f000 [ 40.494331] RBP: 00007f6abb04f000 R08: 0000000000000009 R09: 0000000000001000 [ 40.495209] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea227b2ec0 [ 40.496074] R13: 00007ffe6c729640 R14: 00007ffe6c729670 R15: 00007ffe6c7299d0 [ 40.496955] [ 40.497258] [ 40.497474] Allocated by task 213: [ 40.497902] kasan_save_stack+0x22/0x50 [ 40.498422] kasan_set_track+0x25/0x30 [ 40.498933] __kasan_slab_alloc+0x59/0x70 [ 40.499471] kmem_cache_alloc+0x16b/0x370 [ 40.499992] vm_area_dup+0x20/0x160 [ 40.500452] __split_vma+0x170/0x950 [ 40.500931] split_vma+0xc6/0x110 [ 40.501384] mprotect_fixup+0x8d2/0xb30 [ 40.501907] do_mprotect_pkey+0x87e/0xd40 [ 40.502447] __x64_sys_mprotect+0x78/0xc0 [ 40.503008] do_syscall_64+0x3f/0x90 [ 40.503498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.504161] [ 40.504385] Freed by task 213: [ 40.504792] kasan_save_stack+0x22/0x50 [ 40.505317] kasan_set_track+0x25/0x30 [ 40.505830] kasan_save_free_info+0x2b/0x50 [ 40.506381] __kasan_slab_free+0x10a/0x190 [ 40.506951] kmem_cache_free+0x10d/0x4d0 [ 40.507484] rcu_core+0x8c8/0x2860 [ 40.507945] __do_softirq+0x1b7/0x7d4 [ 40.508445] [ 40.508667] Last potentially related work creation: [ 40.509277] kasan_save_stack+0x22/0x50 [ 40.509802] __kasan_record_aux_stack+0x8e/0xa0 [ 40.510394] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.511077] remove_vma+0x139/0x170 [ 40.511555] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.512132] do_vmi_munmap+0x1f1/0x2b0 [ 40.512636] __vm_munmap+0x138/0x3a0 [ 40.513127] __x64_sys_munmap+0x59/0x80 [ 40.513641] do_syscall_64+0x3f/0x90 [ 40.514132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.514815] [ 40.515037] The buggy address belongs to the object at ffff8880199fbe80 [ 40.515037] which belongs to the cache vm_area_struct of size 168 [ 40.516564] The buggy address is located 88 bytes inside of [ 40.516564] freed 168-byte region [ffff8880199fbe80, ffff8880199fbf28) [ 40.518026] [ 40.518250] The buggy address belongs to the physical page: [ 40.518955] page:00000000d85fe119 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199fb [ 40.520090] memcg:ffff88800e5dfa01 [ 40.520533] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.521204] page_type: 0xffffffff() [ 40.521669] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.522647] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5dfa01 [ 40.523602] page dumped because: kasan: bad access detected [ 40.524290] [ 40.524511] Memory state around the buggy address: [ 40.525116] ffff8880199fbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.526007] ffff8880199fbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 40.526917] >ffff8880199fbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.527801] ^ [ 40.528560] ffff8880199fbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.529449] ffff8880199fbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.530336] ================================================================== [ 40.531661] Disabling lock debugging due to kernel taint [ 42.989797] BUG: Bad rss-counter state mm:000000005a46d5a6 type:MM_FILEPAGES val:33 [ 42.991000] BUG: Bad rss-counter state mm:000000005a46d5a6 type:MM_ANONPAGES val:22 [ 43.344537] BUG: Bad rss-counter state mm:000000002ca40574 type:MM_FILEPAGES val:33 [ 43.345248] BUG: Bad rss-counter state mm:000000002ca40574 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46319' (ECDSA) to the list of known hosts. 2023/06/19 21:33:11 fuzzer started 2023/06/19 21:33:12 dialing manager at localhost:44161 2023/06/19 21:33:12 checking machine... 2023/06/19 21:33:12 checking revisions... [ 44.050692] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:33:12 testing simple program... [ 44.106827] cgroup: Unknown subsys name 'net' [ 44.145701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:33:02 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007fef1deac477 RCX=0000000080000001 RDX=ffff8880196a1b40 RSI=ffffffff813a0ab6 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88801686f8c0 R8 =0000000000000006 R9 =00007fef1deac477 R10=ffffffffffffffff R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff8880196a1b40 R15=0000000000000dc0 RIP=ffffffff814c07f1 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 00007fef1d9b9900 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=00007ffde8804000 CR3=000000000e340000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f148b4252a0 CR3=000000000d5f0000 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=b6b7a041da4c7385804d7ae4a1c2eb3e XMM02=2c67c8bc2e329bc3000000000011df98 XMM03=fb795ef6d65770560000000000124c68 XMM04=fdc4b3e206361b5100000000000ae988 XMM05=e4cb8bb95a7664b60000000000134768 XMM06=e38ac25c5213bc9600000000001335d0 XMM07=e042d86d42eb936e0000000000124ee8 XMM08=c1c46b6e3eaaa0d2000000000011dff8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000