Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.787734] BUG: Bad rss-counter state mm:00000000c8125934 type:MM_FILEPAGES val:33 [ 23.789137] BUG: Bad rss-counter state mm:00000000c8125934 type:MM_ANONPAGES val:22 [ 23.825697] ================================================================== [ 23.826716] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.827668] Read of size 8 at addr ffff888014324c20 by task sshd/218 [ 23.828722] [ 23.829000] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.829889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.831011] Call Trace: [ 23.831337] [ 23.831625] dump_stack_lvl+0x91/0xf0 [ 23.832228] print_report+0xcc/0x620 [ 23.832798] ? __virt_addr_valid+0x102/0x340 [ 23.833461] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.834092] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.834722] kasan_report+0xbe/0xf0 [ 23.835240] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.835858] vma_interval_tree_remove+0xc75/0xec0 [ 23.836681] vma_prepare+0xc54/0x11a0 [ 23.837168] __split_vma+0x5af/0x950 [ 23.837649] ? __pfx___split_vma+0x10/0x10 [ 23.838188] ? find_held_lock+0x2c/0x110 [ 23.838728] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.839330] ? lock_is_held_type+0x9f/0x120 [ 23.839876] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.840488] ? mtree_range_walk+0x632/0x900 [ 23.841039] ? mas_walk+0x5c7/0x7c0 [ 23.841520] do_vmi_munmap+0x1f1/0x2b0 [ 23.842016] mmap_region+0x1f9/0x2660 [ 23.842502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.843035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.843761] ? __pfx_lock_acquire+0x10/0x10 [ 23.844293] ? __pfx_mmap_region+0x10/0x10 [ 23.844835] ? security_mmap_addr+0x7d/0xa0 [ 23.845363] ? get_unmapped_area+0x1f5/0x3f0 [ 23.845921] do_mmap+0x854/0xf00 [ 23.846364] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.846885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.847452] ksys_mmap_pgoff+0x3af/0x500 [ 23.847964] do_syscall_64+0x3f/0x90 [ 23.848442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.849098] RIP: 0033:0x7fdbac6b0d82 [ 23.849564] 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 [ 23.851736] RSP: 002b:00007ffdc13244e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.852647] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbac6b0d82 [ 23.853503] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbabaea000 [ 23.854363] RBP: 00007fdbabaea000 R08: 0000000000000009 R09: 0000000000001000 [ 23.855222] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a731585ec0 [ 23.856080] R13: 00007ffdc1324500 R14: 00007ffdc1324530 R15: 00007ffdc1324890 [ 23.856940] [ 23.857236] [ 23.857457] Allocated by task 211: [ 23.857885] kasan_save_stack+0x22/0x50 [ 23.858391] kasan_set_track+0x25/0x30 [ 23.858918] __kasan_slab_alloc+0x59/0x70 [ 23.859446] kmem_cache_alloc+0x16b/0x370 [ 23.859962] vm_area_dup+0x20/0x160 [ 23.860419] __split_vma+0x170/0x950 [ 23.860887] split_vma+0xc6/0x110 [ 23.861325] mprotect_fixup+0x8d2/0xb30 [ 23.861834] do_mprotect_pkey+0x87e/0xd40 [ 23.862353] __x64_sys_mprotect+0x78/0xc0 [ 23.862885] do_syscall_64+0x3f/0x90 [ 23.863357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.864012] [ 23.864229] Freed by task 211: [ 23.864618] kasan_save_stack+0x22/0x50 [ 23.865119] kasan_set_track+0x25/0x30 [ 23.865611] kasan_save_free_info+0x2b/0x50 [ 23.866137] __kasan_slab_free+0x10a/0x190 [ 23.866671] kmem_cache_free+0x10d/0x4d0 [ 23.867180] rcu_core+0x8c8/0x2860 [ 23.867590] __do_softirq+0x1b7/0x7d4 [ 23.868060] [ 23.868271] Last potentially related work creation: [ 23.868870] kasan_save_stack+0x22/0x50 [ 23.869371] __kasan_record_aux_stack+0x8e/0xa0 [ 23.869946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.870596] remove_vma+0x139/0x170 [ 23.871059] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.871614] do_vmi_munmap+0x1f1/0x2b0 [ 23.872098] __vm_munmap+0x138/0x3a0 [ 23.872569] __x64_sys_munmap+0x59/0x80 [ 23.873063] do_syscall_64+0x3f/0x90 [ 23.873535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.874175] [ 23.874390] The buggy address belongs to the object at ffff888014324bc8 [ 23.874390] which belongs to the cache vm_area_struct of size 168 [ 23.875893] The buggy address is located 88 bytes inside of [ 23.875893] freed 168-byte region [ffff888014324bc8, ffff888014324c70) [ 23.877295] [ 23.877513] The buggy address belongs to the physical page: [ 23.878181] page:00000000ebd15263 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14324 [ 23.879284] memcg:ffff8880158bee01 [ 23.879711] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.880416] page_type: 0xffffffff() [ 23.880873] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 23.881789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158bee01 [ 23.882857] page dumped because: kasan: bad access detected [ 23.883513] [ 23.883727] Memory state around the buggy address: [ 23.884307] ffff888014324b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.885168] ffff888014324b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.886021] >ffff888014324c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.886886] ^ [ 23.887409] ffff888014324c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 23.888262] ffff888014324d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 23.889104] ================================================================== [ 23.890194] Disabling lock debugging due to kernel taint [ 26.522727] BUG: Bad rss-counter state mm:00000000b2a13838 type:MM_FILEPAGES val:33 [ 26.523847] BUG: Bad rss-counter state mm:00000000b2a13838 type:MM_ANONPAGES val:22 [ 27.110554] BUG: Bad rss-counter state mm:00000000bc1a87c1 type:MM_FILEPAGES val:33 [ 27.111705] BUG: Bad rss-counter state mm:00000000bc1a87c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14613' (ECDSA) to the list of known hosts. 2023/06/21 08:12:24 fuzzer started 2023/06/21 08:12:24 dialing manager at localhost:36067 2023/06/21 08:12:25 checking machine... 2023/06/21 08:12:25 checking revisions... [ 27.856683] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:12:25 testing simple program... [ 27.907474] cgroup: Unknown subsys name 'net' [ 27.963211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:12:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=ffffffff864bce01 RDX=1ffff1100d9c1384 RSI=ffffffff8451349f RDI=ffff88806ce09b6c RBP=ffff88806ce09c20 RSP=ffff88806ce09a78 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800981bc60 RIP=ffffffff813ad547 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 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=0000561d9f5f7038 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=00007f8772ee5510000055f94b624790 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=0000000000000000 RBX=00007f9224f022fd RCX=0000000000000000 RDX=ffff888014339b40 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=00007f9224f022fd RSP=ffff88800d99f380 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800d99f488 R13=0000000000000000 R14=ffff888014339b40 R15=ffff888019da2e40 RIP=ffffffff811fc7d5 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 00007f9224638900 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=00007f54e08e5650 CR3=000000000de40000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=25829431b5e7c75f00000000000ae988 XMM05=395cfb5b8bdcdea00000000000132978 XMM06=751b9502027dc0b900000000001314c0 XMM07=fb795ef6d65770560000000000121650 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000