syzkaller login: [ 29.857329] BUG: Bad rss-counter state mm:00000000e54f8017 type:MM_FILEPAGES val:33 [ 29.858521] BUG: Bad rss-counter state mm:00000000e54f8017 type:MM_ANONPAGES val:22 [ 29.974450] ================================================================== [ 29.975363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.976310] Read of size 8 at addr ffff88801aae6df0 by task sshd/221 [ 29.977088] [ 29.977379] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.978260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.979231] Call Trace: [ 29.979633] [ 29.979988] dump_stack_lvl+0x91/0xf0 [ 29.980568] print_report+0xcc/0x620 [ 29.981134] ? __virt_addr_valid+0x102/0x340 [ 29.981790] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.982511] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.983236] kasan_report+0xbe/0xf0 [ 29.983796] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.984603] vma_interval_tree_remove+0xc75/0xec0 [ 29.985388] vma_prepare+0xc54/0x11a0 [ 29.986030] __split_vma+0x5af/0x950 [ 29.986635] ? __pfx___split_vma+0x10/0x10 [ 29.987198] ? find_held_lock+0x2c/0x110 [ 29.987735] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.988316] ? lock_is_held_type+0x9f/0x120 [ 29.988868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.989494] ? mtree_range_walk+0x632/0x900 [ 29.990082] ? mas_walk+0x5c7/0x7c0 [ 29.990566] do_vmi_munmap+0x1f1/0x2b0 [ 29.991076] mmap_region+0x1f9/0x2660 [ 29.991570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.992105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.992841] ? __pfx_lock_acquire+0x10/0x10 [ 29.993400] ? __pfx_mmap_region+0x10/0x10 [ 29.993973] ? security_mmap_addr+0x7d/0xa0 [ 29.994518] ? get_unmapped_area+0x1f5/0x3f0 [ 29.995075] do_mmap+0x854/0xf00 [ 29.995523] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.996041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.996619] ksys_mmap_pgoff+0x3af/0x500 [ 29.997144] do_syscall_64+0x3f/0x90 [ 29.997632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.998316] RIP: 0033:0x7fc594b23d82 [ 29.998789] 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 [ 30.001007] RSP: 002b:00007ffcb0474098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.001950] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc594b23d82 [ 30.002827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc593f5d000 [ 30.003705] RBP: 00007fc593f5d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.004565] R10: 0000000000000812 R11: 0000000000000206 R12: 000056402fdb6ec0 [ 30.005441] R13: 00007ffcb04740b0 R14: 00007ffcb04740e0 R15: 00007ffcb0474440 [ 30.006351] [ 30.006646] [ 30.006874] Allocated by task 214: [ 30.007318] kasan_save_stack+0x22/0x50 [ 30.007835] kasan_set_track+0x25/0x30 [ 30.008342] __kasan_slab_alloc+0x59/0x70 [ 30.008881] kmem_cache_alloc+0x16b/0x370 [ 30.009413] vm_area_dup+0x20/0x160 [ 30.009898] __split_vma+0x170/0x950 [ 30.010383] split_vma+0xc6/0x110 [ 30.010843] mprotect_fixup+0x8d2/0xb30 [ 30.011363] do_mprotect_pkey+0x87e/0xd40 [ 30.011907] __x64_sys_mprotect+0x78/0xc0 [ 30.012440] do_syscall_64+0x3f/0x90 [ 30.012934] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.013595] [ 30.013842] Freed by task 214: [ 30.014248] kasan_save_stack+0x22/0x50 [ 30.014766] kasan_set_track+0x25/0x30 [ 30.015277] kasan_save_free_info+0x2b/0x50 [ 30.015824] __kasan_slab_free+0x10a/0x190 [ 30.016357] kmem_cache_free+0x10d/0x4d0 [ 30.016869] rcu_core+0x8c8/0x2860 [ 30.017307] __do_softirq+0x1b7/0x7d4 [ 30.017784] [ 30.018000] Last potentially related work creation: [ 30.018573] kasan_save_stack+0x22/0x50 [ 30.019076] __kasan_record_aux_stack+0x8e/0xa0 [ 30.019661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.020318] remove_vma+0x139/0x170 [ 30.020781] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.021365] do_vmi_munmap+0x1f1/0x2b0 [ 30.021888] __vm_munmap+0x138/0x3a0 [ 30.022376] __x64_sys_munmap+0x59/0x80 [ 30.022889] do_syscall_64+0x3f/0x90 [ 30.023384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.024052] [ 30.024276] The buggy address belongs to the object at ffff88801aae6d98 [ 30.024276] which belongs to the cache vm_area_struct of size 168 [ 30.025812] The buggy address is located 88 bytes inside of [ 30.025812] freed 168-byte region [ffff88801aae6d98, ffff88801aae6e40) [ 30.027276] [ 30.027497] The buggy address belongs to the physical page: [ 30.028186] page:000000003b9f2a02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aae6 [ 30.029315] memcg:ffff88800f65e801 [ 30.029760] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.030426] page_type: 0xffffffff() [ 30.030890] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.031841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f65e801 [ 30.032780] page dumped because: kasan: bad access detected [ 30.033465] [ 30.033699] Memory state around the buggy address: [ 30.034302] ffff88801aae6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.035187] ffff88801aae6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.036073] >ffff88801aae6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.036952] ^ [ 30.037794] ffff88801aae6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.038676] ffff88801aae6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.039556] ================================================================== [ 30.040946] Disabling lock debugging due to kernel taint [ 32.199024] BUG: Bad rss-counter state mm:0000000091415831 type:MM_FILEPAGES val:33 [ 32.200224] BUG: Bad rss-counter state mm:0000000091415831 type:MM_ANONPAGES val:22 [ 32.690913] BUG: Bad rss-counter state mm:0000000041979568 type:MM_FILEPAGES val:33 [ 32.692478] BUG: Bad rss-counter state mm:0000000041979568 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5297' (ECDSA) to the list of known hosts. 2023/06/20 13:47:40 fuzzer started 2023/06/20 13:47:41 dialing manager at localhost:36067 2023/06/20 13:47:41 checking machine... 2023/06/20 13:47:41 checking revisions... [ 33.409189] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:47:41 testing simple program... [ 33.467202] cgroup: Unknown subsys name 'net' [ 33.510631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:47:40 Registers: info registers vcpu 0 RAX=ffff88800da31720 RBX=ffff88800da31720 RCX=ffff88806ca620b8 RDX=0000000000000000 RSI=ffff88800da31720 RDI=ffff88800844f780 RBP=ffff88800844f780 RSP=ffff888008d9fcd8 R8 =0000000023c0916b R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea0000368c40 R14=ffffffff813782f8 R15=ffff88800da317a0 RIP=ffffffff818106b1 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 0000000000000000 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=00007ffc8c737658 CR3=0000000005482000 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=00007f32ef7ac5100000558540f0f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e37d18 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37c01 RSI=ffff888008e37cd0 RDI=ffff888008e37cd0 RBP=ffff888008e379b0 RSP=ffff888008e378e0 R8 =0000000000000001 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020db7 R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37cd0 R15=ffff888008e37958 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 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=00007f96dc217618 CR3=000000000eb96000 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=563412feff00545000000000000080fe 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