Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.338383] BUG: Bad rss-counter state mm:00000000a59ee063 type:MM_FILEPAGES val:33 [ 35.339434] BUG: Bad rss-counter state mm:00000000a59ee063 type:MM_ANONPAGES val:22 [ 35.496522] ================================================================== [ 35.497423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.498360] Read of size 8 at addr ffff88800e5daa50 by task sshd/220 [ 35.499125] [ 35.499340] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.500329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.501294] Call Trace: [ 35.501615] [ 35.501899] dump_stack_lvl+0x91/0xf0 [ 35.502397] print_report+0xcc/0x620 [ 35.502893] ? __virt_addr_valid+0x102/0x340 [ 35.503442] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.504073] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.504692] kasan_report+0xbe/0xf0 [ 35.505167] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.505796] vma_interval_tree_remove+0xc75/0xec0 [ 35.506395] vma_prepare+0xc54/0x11a0 [ 35.506882] __split_vma+0x5af/0x950 [ 35.507349] ? __pfx___split_vma+0x10/0x10 [ 35.507879] ? find_held_lock+0x2c/0x110 [ 35.508404] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.508962] ? lock_is_held_type+0x9f/0x120 [ 35.509507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.510117] ? mtree_range_walk+0x632/0x900 [ 35.510669] ? mas_walk+0x5c7/0x7c0 [ 35.511139] do_vmi_munmap+0x1f1/0x2b0 [ 35.511630] mmap_region+0x1f9/0x2660 [ 35.512127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.512640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.513362] ? __pfx_lock_acquire+0x10/0x10 [ 35.513895] ? __pfx_mmap_region+0x10/0x10 [ 35.514418] ? security_mmap_addr+0x7d/0xa0 [ 35.514952] ? get_unmapped_area+0x1f5/0x3f0 [ 35.515522] do_mmap+0x854/0xf00 [ 35.515969] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.516480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.517035] ksys_mmap_pgoff+0x3af/0x500 [ 35.517544] do_syscall_64+0x3f/0x90 [ 35.518022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.518676] RIP: 0033:0x7f5b7d89cd82 [ 35.519135] 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 [ 35.521269] RSP: 002b:00007ffc212e1228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.522174] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b7d89cd82 [ 35.523024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b7ccd6000 [ 35.523869] RBP: 00007f5b7ccd6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.524736] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe62678d90 [ 35.525588] R13: 00007ffc212e1240 R14: 00007ffc212e1270 R15: 00007ffc212e15d0 [ 35.526436] [ 35.526728] [ 35.526943] Allocated by task 213: [ 35.527370] kasan_save_stack+0x22/0x50 [ 35.527874] kasan_set_track+0x25/0x30 [ 35.528375] __kasan_slab_alloc+0x59/0x70 [ 35.528905] kmem_cache_alloc+0x16b/0x370 [ 35.529425] vm_area_dup+0x20/0x160 [ 35.529890] __split_vma+0x170/0x950 [ 35.530358] split_vma+0xc6/0x110 [ 35.530800] mprotect_fixup+0x8d2/0xb30 [ 35.531307] do_mprotect_pkey+0x87e/0xd40 [ 35.531828] __x64_sys_mprotect+0x78/0xc0 [ 35.532353] do_syscall_64+0x3f/0x90 [ 35.532825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.533464] [ 35.533683] Freed by task 213: [ 35.534072] kasan_save_stack+0x22/0x50 [ 35.534575] kasan_set_track+0x25/0x30 [ 35.535064] kasan_save_free_info+0x2b/0x50 [ 35.535599] __kasan_slab_free+0x10a/0x190 [ 35.536146] kmem_cache_free+0x10d/0x4d0 [ 35.536649] rcu_core+0x8c8/0x2860 [ 35.537091] __do_softirq+0x1b7/0x7d4 [ 35.537568] [ 35.537784] Last potentially related work creation: [ 35.538368] kasan_save_stack+0x22/0x50 [ 35.538877] __kasan_record_aux_stack+0x8e/0xa0 [ 35.539450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.540094] remove_vma+0x139/0x170 [ 35.540546] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.541101] do_vmi_munmap+0x1f1/0x2b0 [ 35.541597] __vm_munmap+0x138/0x3a0 [ 35.542067] __x64_sys_munmap+0x59/0x80 [ 35.542570] do_syscall_64+0x3f/0x90 [ 35.543063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.543736] [ 35.543957] Second to last potentially related work creation: [ 35.544684] kasan_save_stack+0x22/0x50 [ 35.545201] __kasan_record_aux_stack+0x8e/0xa0 [ 35.545794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.546451] remove_vma+0x139/0x170 [ 35.546918] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.547496] do_vmi_munmap+0x1f1/0x2b0 [ 35.548001] __vm_munmap+0x138/0x3a0 [ 35.548506] elf_map+0x26f/0x310 [ 35.548962] load_elf_binary+0x3417/0x5030 [ 35.549510] bprm_execve+0x803/0x1940 [ 35.549995] do_execveat_common+0x734/0x8e0 [ 35.550539] __x64_sys_execve+0x93/0xc0 [ 35.551035] do_syscall_64+0x3f/0x90 [ 35.551507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.552148] [ 35.552360] The buggy address belongs to the object at ffff88800e5da9f8 [ 35.552360] which belongs to the cache vm_area_struct of size 168 [ 35.553824] The buggy address is located 88 bytes inside of [ 35.553824] freed 168-byte region [ffff88800e5da9f8, ffff88800e5daaa0) [ 35.555236] [ 35.555449] The buggy address belongs to the physical page: [ 35.556119] page:000000000d004ad5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5da [ 35.557188] memcg:ffff88800ce42c01 [ 35.557625] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.558314] page_type: 0xffffffff() [ 35.558779] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.559710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce42c01 [ 35.560629] page dumped because: kasan: bad access detected [ 35.561283] [ 35.561495] Memory state around the buggy address: [ 35.562070] ffff88800e5da900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.562908] ffff88800e5da980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.563748] >ffff88800e5daa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.564592] ^ [ 35.565279] ffff88800e5daa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.566131] ffff88800e5dab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.566988] ================================================================== [ 35.567957] Disabling lock debugging due to kernel taint [ 37.567215] BUG: Bad rss-counter state mm:00000000893ee24c type:MM_FILEPAGES val:33 [ 37.568419] BUG: Bad rss-counter state mm:00000000893ee24c type:MM_ANONPAGES val:22 [ 38.034583] BUG: Bad rss-counter state mm:00000000093c73f3 type:MM_FILEPAGES val:33 [ 38.035571] BUG: Bad rss-counter state mm:00000000093c73f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11177' (ECDSA) to the list of known hosts. 2023/06/19 18:23:33 fuzzer started 2023/06/19 18:23:33 dialing manager at localhost:44161 2023/06/19 18:23:33 checking machine... 2023/06/19 18:23:33 checking revisions... [ 38.760209] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:23:33 testing simple program... [ 38.817013] cgroup: Unknown subsys name 'net' [ 38.890864] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:23:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860d68f6 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860d68fa R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ba8 R15=ffff88806ce09a70 RIP=ffffffff81131153 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 00007fbb03f71900 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=000055be6702b768 CR3=000000000cbbe000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e2d72707b25d23ef00000000000ae988 XMM05=bb23101888b660ce00000000001363e0 XMM06=19e9129bd510f23500000000001351b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888008c11a40 RCX=ffffffff818e8a7f RDX=ffffed100118236b RSI=0000000000000008 RDI=ffff888008c11b50 RBP=0000000000000003 RSP=ffff888016af7eb0 R8 =0000000000000001 R9 =ffffed100118236a R10=ffff888008c11b57 R11=0000000000000000 R12=ffff888008c11b50 R13=ffff888008c11aa0 R14=0000000000000003 R15=0000000000000000 RIP=ffffffff818e8a84 RFL=00000247 [---Z-PC] 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 00007f8660d18900 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=00007f86612cd650 CR3=00000000147e2000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000