[ 23.745188] BUG: Bad rss-counter state mm:000000005583f0e6 type:MM_FILEPAGES val:33 [ 23.746569] BUG: Bad rss-counter state mm:000000005583f0e6 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.896077] ================================================================== [ 23.897149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.898254] Read of size 8 at addr ffff88800e5ab140 by task sshd/220 [ 23.899211] [ 23.899434] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.900292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.901266] Call Trace: [ 23.901584] [ 23.901863] dump_stack_lvl+0x91/0xf0 [ 23.902354] print_report+0xcc/0x620 [ 23.902835] ? __virt_addr_valid+0x102/0x340 [ 23.903390] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.904003] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.904615] kasan_report+0xbe/0xf0 [ 23.905109] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.905756] vma_interval_tree_remove+0xc75/0xec0 [ 23.906384] vma_prepare+0xc54/0x11a0 [ 23.906886] __split_vma+0x5af/0x950 [ 23.907383] ? __pfx___split_vma+0x10/0x10 [ 23.907940] ? find_held_lock+0x2c/0x110 [ 23.908480] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.909092] ? lock_is_held_type+0x9f/0x120 [ 23.909665] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.910297] ? mtree_range_walk+0x632/0x900 [ 23.910866] ? mas_walk+0x5c7/0x7c0 [ 23.911372] do_vmi_munmap+0x1f1/0x2b0 [ 23.911891] mmap_region+0x1f9/0x2660 [ 23.912399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.912952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.913697] ? __pfx_lock_acquire+0x10/0x10 [ 23.914256] ? __pfx_mmap_region+0x10/0x10 [ 23.914818] ? security_mmap_addr+0x7d/0xa0 [ 23.915378] ? get_unmapped_area+0x1f5/0x3f0 [ 23.915953] do_mmap+0x854/0xf00 [ 23.916423] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.916952] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.917547] ksys_mmap_pgoff+0x3af/0x500 [ 23.918081] do_syscall_64+0x3f/0x90 [ 23.918584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.919259] RIP: 0033:0x7f82b1f0ed82 [ 23.919737] 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 [ 23.922023] RSP: 002b:00007ffde24f7d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.922965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82b1f0ed82 [ 23.923855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82b1348000 [ 23.924745] RBP: 00007f82b1348000 R08: 0000000000000009 R09: 0000000000001000 [ 23.925661] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d29baa0d90 [ 23.926549] R13: 00007ffde24f7db0 R14: 00007ffde24f7de0 R15: 00007ffde24f8140 [ 23.927460] [ 23.927770] [ 23.927994] Allocated by task 213: [ 23.928444] kasan_save_stack+0x22/0x50 [ 23.928978] kasan_set_track+0x25/0x30 [ 23.929493] __kasan_slab_alloc+0x59/0x70 [ 23.930056] kmem_cache_alloc+0x16b/0x370 [ 23.930597] vm_area_dup+0x20/0x160 [ 23.931079] __split_vma+0x170/0x950 [ 23.931569] split_vma+0xc6/0x110 [ 23.932040] mprotect_fixup+0x8d2/0xb30 [ 23.932575] do_mprotect_pkey+0x87e/0xd40 [ 23.933132] __x64_sys_mprotect+0x78/0xc0 [ 23.933684] do_syscall_64+0x3f/0x90 [ 23.934189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.934864] [ 23.935086] Freed by task 213: [ 23.935498] kasan_save_stack+0x22/0x50 [ 23.936020] kasan_set_track+0x25/0x30 [ 23.936531] kasan_save_free_info+0x2b/0x50 [ 23.937117] __kasan_slab_free+0x10a/0x190 [ 23.937686] kmem_cache_free+0x10d/0x4d0 [ 23.938213] rcu_core+0x8c8/0x2860 [ 23.938687] __do_softirq+0x1b7/0x7d4 [ 23.939193] [ 23.939415] Last potentially related work creation: [ 23.940022] kasan_save_stack+0x22/0x50 [ 23.940555] __kasan_record_aux_stack+0x8e/0xa0 [ 23.941162] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.941836] remove_vma+0x139/0x170 [ 23.942311] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.942900] do_vmi_munmap+0x1f1/0x2b0 [ 23.943414] __vm_munmap+0x138/0x3a0 [ 23.943908] __x64_sys_munmap+0x59/0x80 [ 23.944429] do_syscall_64+0x3f/0x90 [ 23.944944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945629] [ 23.945855] The buggy address belongs to the object at ffff88800e5ab0e8 [ 23.945855] which belongs to the cache vm_area_struct of size 168 [ 23.947408] The buggy address is located 88 bytes inside of [ 23.947408] freed 168-byte region [ffff88800e5ab0e8, ffff88800e5ab190) [ 23.948906] [ 23.949134] The buggy address belongs to the physical page: [ 23.949827] page:00000000aa5a81bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ab [ 23.950975] memcg:ffff8880144ddd01 [ 23.951424] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.952158] page_type: 0xffffffff() [ 23.952631] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.953603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144ddd01 [ 23.954553] page dumped because: kasan: bad access detected [ 23.955251] [ 23.955477] Memory state around the buggy address: [ 23.956090] ffff88800e5ab000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.956997] ffff88800e5ab080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.957898] >ffff88800e5ab100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.958800] ^ [ 23.959472] ffff88800e5ab180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.960380] ffff88800e5ab200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.961292] ================================================================== [ 23.962290] Disabling lock debugging due to kernel taint [ 25.909520] BUG: Bad rss-counter state mm:00000000b1e195b4 type:MM_FILEPAGES val:33 [ 25.910572] BUG: Bad rss-counter state mm:00000000b1e195b4 type:MM_ANONPAGES val:22 [ 26.380510] BUG: Bad rss-counter state mm:00000000ba1ed303 type:MM_FILEPAGES val:33 [ 26.381505] BUG: Bad rss-counter state mm:00000000ba1ed303 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44071' (ECDSA) to the list of known hosts. 2023/06/20 15:01:01 fuzzer started 2023/06/20 15:01:01 dialing manager at localhost:36067 2023/06/20 15:01:01 checking machine... 2023/06/20 15:01:01 checking revisions... [ 27.170694] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:01:02 testing simple program... [ 27.218446] cgroup: Unknown subsys name 'net' [ 27.255707] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:01:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002c12f97 RCX=0000000000000000 RDX=ffff88800fe451c0 RSI=00007ffc16ac86c0 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888016097cb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff888016097e60 R14=00007ffc16ac86c0 R15=0000000000000000 RIP=ffffffff836405ca 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 00007f0741b11900 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=00007f07420c8618 CR3=000000000e1f4000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f84172614d0 CR3=000000000c946000 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=8af928beeb06c8aa684c39ae2a831f75 XMM02=000000000011fce8eff9b2d0a8fce9cb XMM03=000000000011fdb82c67c8bc2e329bc3 XMM04=eb0df62a613debbd00000000000ae988 XMM05=1773d8a577bdd4980000000000132a10 XMM06=4fda316b135da52b0000000000132098 XMM07=e042d86d42eb936e00000000001226a0 XMM08=9d9156d911c4f510000000000011fdb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000