Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.459936] BUG: Bad rss-counter state mm:000000006c717324 type:MM_FILEPAGES val:33 [ 37.460651] BUG: Bad rss-counter state mm:000000006c717324 type:MM_ANONPAGES val:22 [ 37.677818] ================================================================== [ 37.678421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.679011] Read of size 8 at addr ffff88800e5bf5c8 by task sshd/218 [ 37.679745] [ 37.679898] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 37.684888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.685786] Call Trace: [ 37.686100] [ 37.686391] dump_stack_lvl+0x91/0xf0 [ 37.686825] print_report+0xcc/0x620 [ 37.687271] ? __virt_addr_valid+0x102/0x340 [ 37.687738] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.688278] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.688738] kasan_report+0xbe/0xf0 [ 37.689061] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.689509] vma_interval_tree_remove+0xc75/0xec0 [ 37.689864] vma_prepare+0xc54/0x11a0 [ 37.690188] __split_vma+0x5af/0x950 [ 37.690474] ? __pfx___split_vma+0x10/0x10 [ 37.690799] ? find_held_lock+0x2c/0x110 [ 37.691107] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.691484] ? lock_is_held_type+0x9f/0x120 [ 37.691876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.692287] ? mtree_range_walk+0x632/0x900 [ 37.692667] ? mas_walk+0x5c7/0x7c0 [ 37.692944] do_vmi_munmap+0x1f1/0x2b0 [ 37.693297] mmap_region+0x1f9/0x2660 [ 37.693584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.693918] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.694384] ? __pfx_lock_acquire+0x10/0x10 [ 37.694699] ? __pfx_mmap_region+0x10/0x10 [ 37.695008] ? security_mmap_addr+0x7d/0xa0 [ 37.695397] ? get_unmapped_area+0x1f5/0x3f0 [ 37.695757] do_mmap+0x854/0xf00 [ 37.696036] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.696419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.696792] ksys_mmap_pgoff+0x3af/0x500 [ 37.697106] do_syscall_64+0x3f/0x90 [ 37.697488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.697918] RIP: 0033:0x7fd6820e2d82 [ 37.698277] 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 [ 37.701083] RSP: 002b:00007ffe01df5bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.701740] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6820e2d82 [ 37.702306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd68151c000 [ 37.702810] RBP: 00007fd68151c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.703392] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b199c2ec0 [ 37.703927] R13: 00007ffe01df5bf0 R14: 00007ffe01df5c20 R15: 00007ffe01df5f80 [ 37.704534] [ 37.704717] [ 37.704854] Allocated by task 211: [ 37.705139] kasan_save_stack+0x22/0x50 [ 37.705571] kasan_set_track+0x25/0x30 [ 37.705932] __kasan_slab_alloc+0x59/0x70 [ 37.706369] kmem_cache_alloc+0x16b/0x370 [ 37.706746] vm_area_dup+0x20/0x160 [ 37.707069] __split_vma+0x170/0x950 [ 37.707421] split_vma+0xc6/0x110 [ 37.707730] mprotect_fixup+0x8d2/0xb30 [ 37.708051] do_mprotect_pkey+0x87e/0xd40 [ 37.708409] __x64_sys_mprotect+0x78/0xc0 [ 37.708735] do_syscall_64+0x3f/0x90 [ 37.709019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.709462] [ 37.709592] Freed by task 19: [ 37.709817] kasan_save_stack+0x22/0x50 [ 37.710130] kasan_set_track+0x25/0x30 [ 37.710477] kasan_save_free_info+0x2b/0x50 [ 37.710788] __kasan_slab_free+0x10a/0x190 [ 37.711100] kmem_cache_free+0x10d/0x4d0 [ 37.711474] rcu_core+0x8c8/0x2860 [ 37.711782] __do_softirq+0x1b7/0x7d4 [ 37.712084] [ 37.712296] Last potentially related work creation: [ 37.712712] kasan_save_stack+0x22/0x50 [ 37.713082] __kasan_record_aux_stack+0x8e/0xa0 [ 37.713602] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.714128] remove_vma+0x139/0x170 [ 37.714491] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.714858] do_vmi_munmap+0x1f1/0x2b0 [ 37.715230] __vm_munmap+0x138/0x3a0 [ 37.715606] __x64_sys_munmap+0x59/0x80 [ 37.715961] do_syscall_64+0x3f/0x90 [ 37.716364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.716806] [ 37.716956] The buggy address belongs to the object at ffff88800e5bf570 [ 37.716956] which belongs to the cache vm_area_struct of size 168 [ 37.717996] The buggy address is located 88 bytes inside of [ 37.717996] freed 168-byte region [ffff88800e5bf570, ffff88800e5bf618) [ 37.719000] [ 37.719210] The buggy address belongs to the physical page: [ 37.719677] page:0000000005eb19fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5bf [ 37.720468] memcg:ffff888009902d01 [ 37.720763] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.721328] page_type: 0xffffffff() [ 37.721645] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f6c00 dead000000000009 [ 37.722335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009902d01 [ 37.722952] page dumped because: kasan: bad access detected [ 37.723460] [ 37.723642] Memory state around the buggy address: [ 37.724043] ffff88800e5bf480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.724690] ffff88800e5bf500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 37.725742] >ffff88800e5bf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.726398] ^ [ 37.726862] ffff88800e5bf600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.727522] ffff88800e5bf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.728760] ================================================================== [ 37.731616] Disabling lock debugging due to kernel taint [ 40.152374] BUG: Bad rss-counter state mm:000000000bb20f8f type:MM_FILEPAGES val:33 [ 40.153195] BUG: Bad rss-counter state mm:000000000bb20f8f type:MM_ANONPAGES val:22 [ 40.478895] BUG: Bad rss-counter state mm:0000000054af5f80 type:MM_FILEPAGES val:33 [ 40.479461] BUG: Bad rss-counter state mm:0000000054af5f80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44053' (ECDSA) to the list of known hosts. 2023/06/21 00:07:51 fuzzer started 2023/06/21 00:07:51 dialing manager at localhost:36067 2023/06/21 00:07:51 checking machine... 2023/06/21 00:07:51 checking revisions... [ 41.280176] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:07:51 testing simple program... [ 41.331073] cgroup: Unknown subsys name 'net' [ 41.419057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:07:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00005611c5d5fc78 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=00007f8a7b04b51000005611c5d5d790 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=0000000080000000 RBX=ffff888018275640 RCX=0000000080000000 RDX=ffff888010071b40 RSI=ffffffff83674672 RDI=ffffffff85ba4bc0 RBP=ffffffff83860ae0 RSP=ffff888014507ac8 R8 =0000000000000001 R9 =ffffed10011e7842 R10=ffff888008f3c213 R11=00000000000b6a61 R12=ffff888018275698 R13=ffff888018275640 R14=0000000000000090 R15=0000000000000001 RIP=ffffffff814c0871 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 00007f0056360900 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=00007fff1482e000 CR3=00000000180c4000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000