[ 25.579523] BUG: Bad rss-counter state mm:000000004a0dae7c type:MM_FILEPAGES val:33 [ 25.581051] BUG: Bad rss-counter state mm:000000004a0dae7c type:MM_ANONPAGES val:22 [ 25.733542] ================================================================== [ 25.734908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.736208] Read of size 8 at addr ffff88801a245df0 by task sshd/220 [ 25.737271] [ 25.737573] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.738762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.740117] Call Trace: [ 25.740556] [ 25.740948] dump_stack_lvl+0x91/0xf0 [ 25.741632] print_report+0xcc/0x620 [ 25.742305] ? __virt_addr_valid+0x102/0x340 [ 25.743078] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.743927] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.744786] kasan_report+0xbe/0xf0 [ 25.745452] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.746348] vma_interval_tree_remove+0xc75/0xec0 [ 25.747255] vma_prepare+0xc54/0x11a0 [ 25.747948] __split_vma+0x5af/0x950 [ 25.748628] ? __pfx___split_vma+0x10/0x10 [ 25.749396] ? find_held_lock+0x2c/0x110 [ 25.750151] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.750982] ? lock_is_held_type+0x9f/0x120 [ 25.751756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.752628] ? mtree_range_walk+0x632/0x900 [ 25.753421] ? mas_walk+0x5c7/0x7c0 [ 25.754102] do_vmi_munmap+0x1f1/0x2b0 [ 25.754849] mmap_region+0x1f9/0x2660 [ 25.755548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.756261] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.757261] ? __pfx_lock_acquire+0x10/0x10 [ 25.758004] ? __pfx_mmap_region+0x10/0x10 [ 25.758741] ? security_mmap_addr+0x7d/0xa0 [ 25.759503] ? get_unmapped_area+0x1f5/0x3f0 [ 25.760235] do_mmap+0x854/0xf00 [ 25.760788] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.761413] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.762118] ksys_mmap_pgoff+0x3af/0x500 [ 25.762753] do_syscall_64+0x3f/0x90 [ 25.763389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.764214] RIP: 0033:0x7fadc8529d82 [ 25.764783] 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 [ 25.767487] RSP: 002b:00007ffdd52c4de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.768620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadc8529d82 [ 25.769689] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadc7963000 [ 25.770787] RBP: 00007fadc7963000 R08: 0000000000000009 R09: 0000000000001000 [ 25.771847] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560229d50980 [ 25.772933] R13: 00007ffdd52c4e00 R14: 00007ffdd52c4e30 R15: 00007ffdd52c5190 [ 25.774024] [ 25.774391] [ 25.774662] Allocated by task 213: [ 25.775226] kasan_save_stack+0x22/0x50 [ 25.775818] kasan_set_track+0x25/0x30 [ 25.776329] __kasan_slab_alloc+0x59/0x70 [ 25.776876] kmem_cache_alloc+0x16b/0x370 [ 25.777410] vm_area_dup+0x20/0x160 [ 25.777879] __split_vma+0x170/0x950 [ 25.778368] split_vma+0xc6/0x110 [ 25.778822] mprotect_fixup+0x8d2/0xb30 [ 25.779347] do_mprotect_pkey+0x87e/0xd40 [ 25.779884] __x64_sys_mprotect+0x78/0xc0 [ 25.780415] do_syscall_64+0x3f/0x90 [ 25.780908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.781592] [ 25.781817] Freed by task 213: [ 25.782234] kasan_save_stack+0x22/0x50 [ 25.782757] kasan_set_track+0x25/0x30 [ 25.783294] kasan_save_free_info+0x2b/0x50 [ 25.783851] __kasan_slab_free+0x10a/0x190 [ 25.784400] kmem_cache_free+0x10d/0x4d0 [ 25.784920] rcu_core+0x8c8/0x2860 [ 25.785381] __do_softirq+0x1b7/0x7d4 [ 25.785878] [ 25.786099] Last potentially related work creation: [ 25.786720] kasan_save_stack+0x22/0x50 [ 25.787260] __kasan_record_aux_stack+0x8e/0xa0 [ 25.787862] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.788533] remove_vma+0x139/0x170 [ 25.789001] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.789579] do_vmi_munmap+0x1f1/0x2b0 [ 25.790096] __vm_munmap+0x138/0x3a0 [ 25.790581] __x64_sys_munmap+0x59/0x80 [ 25.791108] do_syscall_64+0x3f/0x90 [ 25.791605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.792261] [ 25.792483] The buggy address belongs to the object at ffff88801a245d98 [ 25.792483] which belongs to the cache vm_area_struct of size 168 [ 25.794006] The buggy address is located 88 bytes inside of [ 25.794006] freed 168-byte region [ffff88801a245d98, ffff88801a245e40) [ 25.795398] [ 25.795613] The buggy address belongs to the physical page: [ 25.796281] page:000000006fe8851c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a245 [ 25.797361] memcg:ffff88800e139e01 [ 25.797787] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.798424] page_type: 0xffffffff() [ 25.798880] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.799787] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e139e01 [ 25.800691] page dumped because: kasan: bad access detected [ 25.801351] [ 25.801564] Memory state around the buggy address: [ 25.802135] ffff88801a245c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.803014] ffff88801a245d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.803869] >ffff88801a245d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 25.804723] ^ [ 25.805516] ffff88801a245e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 25.806357] ffff88801a245e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.807204] ================================================================== [ 25.808203] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.096585] BUG: Bad rss-counter state mm:00000000bf24bbfc type:MM_FILEPAGES val:33 [ 28.097773] BUG: Bad rss-counter state mm:00000000bf24bbfc type:MM_ANONPAGES val:22 [ 28.497886] BUG: Bad rss-counter state mm:00000000183574ea type:MM_FILEPAGES val:33 [ 28.499566] BUG: Bad rss-counter state mm:00000000183574ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59588' (ECDSA) to the list of known hosts. 2023/06/19 13:51:11 fuzzer started 2023/06/19 13:51:11 dialing manager at localhost:44161 2023/06/19 13:51:11 checking machine... 2023/06/19 13:51:11 checking revisions... [ 29.269907] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:51:11 testing simple program... [ 29.329153] cgroup: Unknown subsys name 'net' [ 29.389321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:51:09 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001e0ef5b RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff844f895f RDI=ffff888017f0ba74 RBP=0000000000000012 RSP=ffff88800f077ad0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000012 R11=00000000000b6996 R12=ffff888008f92798 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff814c07eb RFL=00000293 [--S-A-C] 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 00007f881d49d900 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=00007f881da52650 CR3=0000000009474000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055d1bbb18350 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=000055d1bbb3f180 RBP=00007f881d49d6f8 RSP=00007ffd1fa0b440 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000004000 R11=0000000000000246 R12=0000000000000006 R13=00007f881d4789f9 R14=00007ffd1fa0b4a0 R15=000000000000000a RIP=00007f881dfc84eb RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f881d49d900 00000000 00000000 GS =0000 0000000000000000 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=000055d1bbb1a218 CR3=0000000009474000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000