[ 31.156570] BUG: Bad rss-counter state mm:000000001f460672 type:MM_FILEPAGES val:33 [ 31.157831] BUG: Bad rss-counter state mm:000000001f460672 type:MM_ANONPAGES val:22 [ 31.306824] ================================================================== [ 31.307733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.308653] Read of size 8 at addr ffff88801bcc8058 by task sshd/218 [ 31.309412] [ 31.309631] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.310650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.311614] Call Trace: [ 31.311933] [ 31.312316] dump_stack_lvl+0x91/0xf0 [ 31.312810] print_report+0xcc/0x620 [ 31.313296] ? __virt_addr_valid+0x102/0x340 [ 31.313862] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.314463] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.315072] kasan_report+0xbe/0xf0 [ 31.315540] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.316158] vma_interval_tree_remove+0xc75/0xec0 [ 31.316756] vma_prepare+0xc54/0x11a0 [ 31.317228] __split_vma+0x5af/0x950 [ 31.317699] ? __pfx___split_vma+0x10/0x10 [ 31.318216] ? find_held_lock+0x2c/0x110 [ 31.318729] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.319290] ? lock_is_held_type+0x9f/0x120 [ 31.319822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.320426] ? mtree_range_walk+0x632/0x900 [ 31.320967] ? mas_walk+0x5c7/0x7c0 [ 31.321447] do_vmi_munmap+0x1f1/0x2b0 [ 31.321962] mmap_region+0x1f9/0x2660 [ 31.322435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.322956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.323664] ? __pfx_lock_acquire+0x10/0x10 [ 31.324199] ? __pfx_mmap_region+0x10/0x10 [ 31.324725] ? security_mmap_addr+0x7d/0xa0 [ 31.325261] ? get_unmapped_area+0x1f5/0x3f0 [ 31.325840] do_mmap+0x854/0xf00 [ 31.326287] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.326792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.327380] ksys_mmap_pgoff+0x3af/0x500 [ 31.327911] do_syscall_64+0x3f/0x90 [ 31.328408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.329074] RIP: 0033:0x7f6ea3a57d82 [ 31.329543] 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 [ 31.331764] RSP: 002b:00007ffe7c0807f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.332701] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ea3a57d82 [ 31.333581] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ea2e91000 [ 31.334465] RBP: 00007f6ea2e91000 R08: 0000000000000009 R09: 0000000000001000 [ 31.335345] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597e7ae5f60 [ 31.336224] R13: 00007ffe7c080810 R14: 00007ffe7c080840 R15: 00007ffe7c080ba0 [ 31.337110] [ 31.337417] [ 31.337655] Allocated by task 209: [ 31.338106] kasan_save_stack+0x22/0x50 [ 31.338623] kasan_set_track+0x25/0x30 [ 31.339137] __kasan_slab_alloc+0x59/0x70 [ 31.339683] kmem_cache_alloc+0x16b/0x370 [ 31.340219] vm_area_dup+0x20/0x160 [ 31.340691] __split_vma+0x170/0x950 [ 31.341173] split_vma+0xc6/0x110 [ 31.341611] mprotect_fixup+0x8d2/0xb30 [ 31.342116] do_mprotect_pkey+0x87e/0xd40 [ 31.342640] __x64_sys_mprotect+0x78/0xc0 [ 31.343154] do_syscall_64+0x3f/0x90 [ 31.343622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.344262] [ 31.344473] Freed by task 202: [ 31.344862] kasan_save_stack+0x22/0x50 [ 31.345358] kasan_set_track+0x25/0x30 [ 31.345852] kasan_save_free_info+0x2b/0x50 [ 31.346377] __kasan_slab_free+0x10a/0x190 [ 31.346899] kmem_cache_free+0x10d/0x4d0 [ 31.347395] rcu_core+0x8c8/0x2860 [ 31.347832] __do_softirq+0x1b7/0x7d4 [ 31.348299] [ 31.348513] Last potentially related work creation: [ 31.349088] kasan_save_stack+0x22/0x50 [ 31.349587] __kasan_record_aux_stack+0x8e/0xa0 [ 31.350161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.350791] remove_vma+0x139/0x170 [ 31.351233] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.351874] do_vmi_munmap+0x1f1/0x2b0 [ 31.352350] __vm_munmap+0x138/0x3a0 [ 31.352819] __x64_sys_munmap+0x59/0x80 [ 31.353304] do_syscall_64+0x3f/0x90 [ 31.353777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.354417] [ 31.354633] The buggy address belongs to the object at ffff88801bcc8000 [ 31.354633] which belongs to the cache vm_area_struct of size 168 [ 31.356077] The buggy address is located 88 bytes inside of [ 31.356077] freed 168-byte region [ffff88801bcc8000, ffff88801bcc80a8) [ 31.357453] [ 31.357682] The buggy address belongs to the physical page: [ 31.358334] page:0000000011c5b25e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bcc8 [ 31.359396] memcg:ffff888016d0a401 [ 31.359816] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.360446] page_type: 0xffffffff() [ 31.360886] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.361794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d0a401 [ 31.362684] page dumped because: kasan: bad access detected [ 31.363333] [ 31.363544] Memory state around the buggy address: [ 31.364111] ffff88801bcc7f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.364950] ffff88801bcc7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.365798] >ffff88801bcc8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.366630] ^ [ 31.367342] ffff88801bcc8080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.368184] ffff88801bcc8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.369017] ================================================================== [ 31.370008] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.208162] BUG: Bad rss-counter state mm:000000001c0cc838 type:MM_FILEPAGES val:33 [ 33.209007] BUG: Bad rss-counter state mm:000000001c0cc838 type:MM_ANONPAGES val:22 [ 33.664115] BUG: Bad rss-counter state mm:000000007aab9a5b type:MM_FILEPAGES val:33 [ 33.665255] BUG: Bad rss-counter state mm:000000007aab9a5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32215' (ECDSA) to the list of known hosts. 2023/06/19 12:19:02 fuzzer started 2023/06/19 12:19:02 dialing manager at localhost:44161 2023/06/19 12:19:02 checking machine... 2023/06/19 12:19:02 checking revisions... [ 34.303558] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:19:02 testing simple program... [ 34.350733] cgroup: Unknown subsys name 'net' [ 34.421064] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:18:55 Registers: info registers vcpu 0 RAX=ffffffff86137009 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85dfc6a4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137004 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a7e 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 00007f6943652700 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=00007f88bafb20b0 CR3=0000000009ac2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84506c7f RBX=ffffffff813ad420 RCX=ffffffff863b1c01 RDX=1ffff11002c4ef10 RSI=ffffffff84506c7f RDI=ffff8880162778f0 RBP=ffff8880162778c0 RSP=ffff888016277820 R8 =ffffffff863b1c9a R9 =ffff888016277868 R10=0000000000038001 R11=000000000008a977 R12=ffff8880162778f0 R13=0000000000000000 R14=ffff888015a93680 R15=0000000000092cc0 RIP=ffffffff84532440 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 00007f88ba9fa900 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=00007f88bafb1618 CR3=000000000e1de000 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