[ 55.275673] BUG: Bad rss-counter state mm:000000008d322d07 type:MM_FILEPAGES val:33 [ 55.276675] BUG: Bad rss-counter state mm:000000008d322d07 type:MM_ANONPAGES val:22 [ 55.313009] ================================================================== [ 55.314043] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.314983] Read of size 8 at addr ffff88800c60ddf0 by task sshd/219 [ 55.315996] [ 55.316214] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.317221] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.318239] Call Trace: [ 55.318557] <TASK> [ 55.318865] dump_stack_lvl+0x91/0xf0 [ 55.319368] print_report+0xcc/0x620 [ 55.319859] ? __virt_addr_valid+0x102/0x340 [ 55.320425] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.321043] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.321663] kasan_report+0xbe/0xf0 [ 55.322140] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.322784] vma_interval_tree_remove+0xc75/0xec0 [ 55.323385] vma_prepare+0xc54/0x11a0 [ 55.323863] __split_vma+0x5af/0x950 [ 55.324335] ? __pfx___split_vma+0x10/0x10 [ 55.324861] ? find_held_lock+0x2c/0x110 [ 55.325377] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.325943] ? lock_is_held_type+0x9f/0x120 [ 55.326479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.327090] ? mtree_range_walk+0x632/0x900 [ 55.327635] ? mas_walk+0x5c7/0x7c0 [ 55.328107] do_vmi_munmap+0x1f1/0x2b0 [ 55.328597] mmap_region+0x1f9/0x2660 [ 55.329085] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.329594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.330304] ? __pfx_lock_acquire+0x10/0x10 [ 55.330866] ? __pfx_mmap_region+0x10/0x10 [ 55.331392] ? security_mmap_addr+0x7d/0xa0 [ 55.331923] ? get_unmapped_area+0x1f5/0x3f0 [ 55.332474] do_mmap+0x854/0xf00 [ 55.332911] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.333411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.333964] ksys_mmap_pgoff+0x3af/0x500 [ 55.334469] do_syscall_64+0x3f/0x90 [ 55.334965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.335608] RIP: 0033:0x7f2ade131d82 [ 55.336074] 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 [ 55.338205] RSP: 002b:00007ffdf85fbae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.339117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ade131d82 [ 55.339961] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2add56b000 [ 55.340801] RBP: 00007f2add56b000 R08: 0000000000000009 R09: 0000000000001000 [ 55.341640] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7eb2d2ec0 [ 55.342482] R13: 00007ffdf85fbb00 R14: 00007ffdf85fbb30 R15: 00007ffdf85fbe90 [ 55.343359] </TASK> [ 55.343647] [ 55.343870] Allocated by task 212: [ 55.344301] kasan_save_stack+0x22/0x50 [ 55.344810] kasan_set_track+0x25/0x30 [ 55.345308] __kasan_slab_alloc+0x59/0x70 [ 55.345837] kmem_cache_alloc+0x16b/0x370 [ 55.346350] vm_area_dup+0x20/0x160 [ 55.346805] __split_vma+0x170/0x950 [ 55.347276] split_vma+0xc6/0x110 [ 55.347712] mprotect_fixup+0x8d2/0xb30 [ 55.348213] do_mprotect_pkey+0x87e/0xd40 [ 55.348732] __x64_sys_mprotect+0x78/0xc0 [ 55.349247] do_syscall_64+0x3f/0x90 [ 55.349714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.350351] [ 55.350565] Freed by task 212: [ 55.350979] kasan_save_stack+0x22/0x50 [ 55.351480] kasan_set_track+0x25/0x30 [ 55.351970] kasan_save_free_info+0x2b/0x50 [ 55.352509] __kasan_slab_free+0x10a/0x190 [ 55.353097] kmem_cache_free+0x10d/0x4d0 [ 55.353682] rcu_core+0x8c8/0x2860 [ 55.354134] __do_softirq+0x1b7/0x7d4 [ 55.354605] [ 55.354827] Last potentially related work creation: [ 55.355409] kasan_save_stack+0x22/0x50 [ 55.355909] __kasan_record_aux_stack+0x8e/0xa0 [ 55.356475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.357120] remove_vma+0x139/0x170 [ 55.357634] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.358186] do_vmi_munmap+0x1f1/0x2b0 [ 55.358697] __vm_munmap+0x138/0x3a0 [ 55.359167] __x64_sys_munmap+0x59/0x80 [ 55.359660] do_syscall_64+0x3f/0x90 [ 55.360137] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.360774] [ 55.360993] The buggy address belongs to the object at ffff88800c60dd98 [ 55.360993] which belongs to the cache vm_area_struct of size 168 [ 55.362456] The buggy address is located 88 bytes inside of [ 55.362456] freed 168-byte region [ffff88800c60dd98, ffff88800c60de40) [ 55.363851] [ 55.364066] The buggy address belongs to the physical page: [ 55.364717] page:00000000fad0f5d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc60d [ 55.365800] memcg:ffff88800e66cd01 [ 55.366233] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.366894] page_type: 0xffffffff() [ 55.367342] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6000 dead000000000006 [ 55.368263] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e66cd01 [ 55.369168] page dumped because: kasan: bad access detected [ 55.369827] [ 55.370041] Memory state around the buggy address: [ 55.370626] ffff88800c60dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 55.371480] ffff88800c60dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 55.372343] >ffff88800c60dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 55.373189] ^ [ 55.373990] ffff88800c60de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 55.374849] ffff88800c60de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.375696] ================================================================== [ 55.376671] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.406597] BUG: Bad rss-counter state mm:00000000b1729e22 type:MM_FILEPAGES val:33 [ 57.407802] BUG: Bad rss-counter state mm:00000000b1729e22 type:MM_ANONPAGES val:22 [ 57.819538] BUG: Bad rss-counter state mm:00000000cd1d3066 type:MM_FILEPAGES val:33 [ 57.821025] BUG: Bad rss-counter state mm:00000000cd1d3066 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64479' (ECDSA) to the list of known hosts. 2023/06/20 01:26:02 fuzzer started 2023/06/20 01:26:02 dialing manager at localhost:44161 2023/06/20 01:26:02 checking machine... 2023/06/20 01:26:02 checking revisions... [ 58.590162] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:26:02 testing simple program... [ 58.647663] cgroup: Unknown subsys name 'net' [ 58.705107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:26:01 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcf9e5a798 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=00007fe574e1e510000055c894713790 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=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001e00e5c RSI=ffff88800f007568 RDI=ffff88800f0072e0 RBP=ffff888008442140 RSP=ffff88800f007220 R8 =0000000000000001 R9 =ffff88800f0072d0 R10=0000000000038001 R11=0000000000020cf8 R12=ffff88800f0072f0 R13=ffff88800f0072d8 R14=ffff88800f007568 R15=ffff88800f007290 RIP=ffffffff81131266 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 00007f7f4e74a900 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=00007f7f4ed01618 CR3=000000000e674000 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=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