syzkaller login: [ 68.844348] BUG: Bad rss-counter state mm:00000000bde19930 type:MM_FILEPAGES val:33 [ 68.845565] BUG: Bad rss-counter state mm:00000000bde19930 type:MM_ANONPAGES val:22 [ 68.881541] ================================================================== [ 68.882583] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.883706] Read of size 8 at addr ffff888018465228 by task sshd/228 [ 68.884559] [ 68.884780] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.885837] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.886818] Call Trace: [ 68.887144] [ 68.887434] dump_stack_lvl+0x91/0xf0 [ 68.887952] print_report+0xcc/0x620 [ 68.888449] ? __virt_addr_valid+0x102/0x340 [ 68.889016] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.889637] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.890274] kasan_report+0xbe/0xf0 [ 68.890754] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.891383] vma_interval_tree_remove+0xc75/0xec0 [ 68.891988] vma_prepare+0xc54/0x11a0 [ 68.892474] __split_vma+0x5af/0x950 [ 68.892954] ? __pfx___split_vma+0x10/0x10 [ 68.893485] ? find_held_lock+0x2c/0x110 [ 68.894027] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.894603] ? lock_is_held_type+0x9f/0x120 [ 68.895150] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.895757] ? mtree_range_walk+0x632/0x900 [ 68.896318] ? mas_walk+0x5c7/0x7c0 [ 68.896800] do_vmi_munmap+0x1f1/0x2b0 [ 68.897296] mmap_region+0x1f9/0x2660 [ 68.897805] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.898322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.899052] ? __pfx_lock_acquire+0x10/0x10 [ 68.899591] ? __pfx_mmap_region+0x10/0x10 [ 68.900125] ? security_mmap_addr+0x7d/0xa0 [ 68.900660] ? get_unmapped_area+0x1f5/0x3f0 [ 68.901207] do_mmap+0x854/0xf00 [ 68.901655] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.902165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.902730] ksys_mmap_pgoff+0x3af/0x500 [ 68.903240] do_syscall_64+0x3f/0x90 [ 68.903721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.904376] RIP: 0033:0x7f63ab02ad82 [ 68.904834] 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 [ 68.906997] RSP: 002b:00007ffea68b39f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.907913] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63ab02ad82 [ 68.908762] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63aa464000 [ 68.909612] RBP: 00007f63aa464000 R08: 0000000000000009 R09: 0000000000001000 [ 68.910630] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f87dffec0 [ 68.911479] R13: 00007ffea68b3a10 R14: 00007ffea68b3a40 R15: 00007ffea68b3da0 [ 68.912364] [ 68.912658] [ 68.912877] Allocated by task 221: [ 68.913305] kasan_save_stack+0x22/0x50 [ 68.913823] kasan_set_track+0x25/0x30 [ 68.914318] __kasan_slab_alloc+0x59/0x70 [ 68.914845] kmem_cache_alloc+0x16b/0x370 [ 68.915364] vm_area_dup+0x20/0x160 [ 68.915819] __split_vma+0x170/0x950 [ 68.916289] split_vma+0xc6/0x110 [ 68.916731] mprotect_fixup+0x8d2/0xb30 [ 68.917237] do_mprotect_pkey+0x87e/0xd40 [ 68.917776] __x64_sys_mprotect+0x78/0xc0 [ 68.918306] do_syscall_64+0x3f/0x90 [ 68.918783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.919426] [ 68.919643] Freed by task 221: [ 68.920038] kasan_save_stack+0x22/0x50 [ 68.920545] kasan_set_track+0x25/0x30 [ 68.921043] kasan_save_free_info+0x2b/0x50 [ 68.921587] __kasan_slab_free+0x10a/0x190 [ 68.922141] kmem_cache_free+0x10d/0x4d0 [ 68.922656] rcu_core+0x8c8/0x2860 [ 68.923109] __do_softirq+0x1b7/0x7d4 [ 68.923588] [ 68.923809] Last potentially related work creation: [ 68.924394] kasan_save_stack+0x22/0x50 [ 68.924904] __kasan_record_aux_stack+0x8e/0xa0 [ 68.925479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.926132] remove_vma+0x139/0x170 [ 68.926581] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.927141] do_vmi_munmap+0x1f1/0x2b0 [ 68.927630] __vm_munmap+0x138/0x3a0 [ 68.928096] __x64_sys_munmap+0x59/0x80 [ 68.928596] do_syscall_64+0x3f/0x90 [ 68.929078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.929727] [ 68.929959] The buggy address belongs to the object at ffff8880184651d0 [ 68.929959] which belongs to the cache vm_area_struct of size 168 [ 68.931428] The buggy address is located 88 bytes inside of [ 68.931428] freed 168-byte region [ffff8880184651d0, ffff888018465278) [ 68.932854] [ 68.933071] The buggy address belongs to the physical page: [ 68.933735] page:000000007726c430 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18465 [ 68.934822] memcg:ffff888018466001 [ 68.935251] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.935895] page_type: 0xffffffff() [ 68.936346] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.937265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018466001 [ 68.938187] page dumped because: kasan: bad access detected [ 68.938849] [ 68.939062] Memory state around the buggy address: [ 68.939662] ffff888018465100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.940539] ffff888018465180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.941393] >ffff888018465200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.942233] ^ [ 68.942777] ffff888018465280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 68.943619] ffff888018465300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 68.944464] ================================================================== [ 68.945397] Disabling lock debugging due to kernel taint [ 70.453888] BUG: Bad rss-counter state mm:00000000093b7f58 type:MM_FILEPAGES val:33 [ 70.455065] BUG: Bad rss-counter state mm:00000000093b7f58 type:MM_ANONPAGES val:22 [ 70.884889] BUG: Bad rss-counter state mm:000000006914f562 type:MM_FILEPAGES val:33 [ 70.886370] BUG: Bad rss-counter state mm:000000006914f562 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27149' (ECDSA) to the list of known hosts. 2023/06/21 06:04:00 fuzzer started 2023/06/21 06:04:00 dialing manager at localhost:36067 2023/06/21 06:04:00 checking machine... 2023/06/21 06:04:00 checking revisions... [ 71.599385] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:04:00 testing simple program... [ 71.652217] cgroup: Unknown subsys name 'net' [ 71.704317] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:04:00 Registers: info registers vcpu 0 RAX=000000000000000d RBX=ffffed100300fe86 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3d350 RBP=ffff888008fae000 RSP=ffff88801807f430 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00000000000128c0 R13=00000000000128c0 R14=00000000000128c0 R15=00000000000128c0 RIP=ffffffff813ad740 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 00007f61eed4d900 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=00007f61ef304618 CR3=000000000cc06000 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=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=00007fa4e2ac9430 CR3=000000000ca8a000 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=2039353a33303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33303a3630203132 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000