[ 38.876719] BUG: Bad rss-counter state mm:00000000bd011fe8 type:MM_FILEPAGES val:33 [ 38.877462] BUG: Bad rss-counter state mm:00000000bd011fe8 type:MM_ANONPAGES val:22 [ 39.025897] ================================================================== [ 39.026827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.027444] Read of size 8 at addr ffff88800c948d08 by task sshd/226 [ 39.027906] [ 39.028018] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.028465] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.029002] Call Trace: [ 39.029194] [ 39.029350] dump_stack_lvl+0x91/0xf0 [ 39.029613] print_report+0xcc/0x620 [ 39.029907] ? __virt_addr_valid+0x102/0x340 [ 39.030247] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.030570] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.030923] kasan_report+0xbe/0xf0 [ 39.031204] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.031519] vma_interval_tree_remove+0xc75/0xec0 [ 39.031856] vma_prepare+0xc54/0x11a0 [ 39.032132] __split_vma+0x5af/0x950 [ 39.032383] ? __pfx___split_vma+0x10/0x10 [ 39.032666] ? find_held_lock+0x2c/0x110 [ 39.032974] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.033309] ? lock_is_held_type+0x9f/0x120 [ 39.033746] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.034335] ? mtree_range_walk+0x632/0x900 [ 39.034805] ? mas_walk+0x5c7/0x7c0 [ 39.035231] do_vmi_munmap+0x1f1/0x2b0 [ 39.035497] mmap_region+0x1f9/0x2660 [ 39.035776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.036071] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.036461] ? __pfx_lock_acquire+0x10/0x10 [ 39.036747] ? __pfx_mmap_region+0x10/0x10 [ 39.037048] ? security_mmap_addr+0x7d/0xa0 [ 39.037335] ? get_unmapped_area+0x1f5/0x3f0 [ 39.037618] do_mmap+0x854/0xf00 [ 39.037889] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.038184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.038573] ksys_mmap_pgoff+0x3af/0x500 [ 39.038928] do_syscall_64+0x3f/0x90 [ 39.039267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.039690] RIP: 0033:0x7f15086ccd82 [ 39.040009] 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 [ 39.041426] RSP: 002b:00007ffd5c599688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.042043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15086ccd82 [ 39.042635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1507b06000 [ 39.043216] RBP: 00007f1507b06000 R08: 0000000000000009 R09: 0000000000001000 [ 39.043788] R10: 0000000000000812 R11: 0000000000000206 R12: 000055646a534ec0 [ 39.044372] R13: 00007ffd5c5996a0 R14: 00007ffd5c5996d0 R15: 00007ffd5c599a30 [ 39.044971] [ 39.045171] [ 39.045316] Allocated by task 215: [ 39.045600] kasan_save_stack+0x22/0x50 [ 39.045961] kasan_set_track+0x25/0x30 [ 39.046333] __kasan_slab_alloc+0x59/0x70 [ 39.046701] kmem_cache_alloc+0x16b/0x370 [ 39.047063] vm_area_dup+0x20/0x160 [ 39.047374] __split_vma+0x170/0x950 [ 39.047689] split_vma+0xc6/0x110 [ 39.048004] mprotect_fixup+0x8d2/0xb30 [ 39.048343] do_mprotect_pkey+0x87e/0xd40 [ 39.048696] __x64_sys_mprotect+0x78/0xc0 [ 39.049070] do_syscall_64+0x3f/0x90 [ 39.049407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.049855] [ 39.050015] Freed by task 215: [ 39.050311] kasan_save_stack+0x22/0x50 [ 39.050661] kasan_set_track+0x25/0x30 [ 39.051013] kasan_save_free_info+0x2b/0x50 [ 39.051393] __kasan_slab_free+0x10a/0x190 [ 39.051761] kmem_cache_free+0x10d/0x4d0 [ 39.052112] rcu_core+0x8c8/0x2860 [ 39.052418] __do_softirq+0x1b7/0x7d4 [ 39.052749] [ 39.052918] Last potentially related work creation: [ 39.053312] kasan_save_stack+0x22/0x50 [ 39.053656] __kasan_record_aux_stack+0x8e/0xa0 [ 39.054160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.054624] remove_vma+0x139/0x170 [ 39.054944] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.055341] do_vmi_munmap+0x1f1/0x2b0 [ 39.055668] __vm_munmap+0x138/0x3a0 [ 39.055995] __x64_sys_munmap+0x59/0x80 [ 39.056330] do_syscall_64+0x3f/0x90 [ 39.056664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.057121] [ 39.057272] The buggy address belongs to the object at ffff88800c948cb0 [ 39.057272] which belongs to the cache vm_area_struct of size 168 [ 39.058282] The buggy address is located 88 bytes inside of [ 39.058282] freed 168-byte region [ffff88800c948cb0, ffff88800c948d58) [ 39.059247] [ 39.059398] The buggy address belongs to the physical page: [ 39.059846] page:0000000098f234ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc948 [ 39.060582] memcg:ffff88801588d401 [ 39.060892] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.061330] page_type: 0xffffffff() [ 39.061638] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c4880 dead000000000008 [ 39.062306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801588d401 [ 39.062931] page dumped because: kasan: bad access detected [ 39.063383] [ 39.063533] Memory state around the buggy address: [ 39.063941] ffff88800c948c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.064519] ffff88800c948c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.065113] >ffff88800c948d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.065681] ^ [ 39.065996] ffff88800c948d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.066628] ffff88800c948e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.067209] ================================================================== [ 39.068102] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.175732] BUG: Bad rss-counter state mm:000000007f2ed9f7 type:MM_FILEPAGES val:33 [ 44.176395] BUG: Bad rss-counter state mm:000000007f2ed9f7 type:MM_ANONPAGES val:22 [ 44.828471] BUG: Bad rss-counter state mm:000000003321aa1c type:MM_FILEPAGES val:33 [ 44.829105] BUG: Bad rss-counter state mm:000000003321aa1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15486' (ECDSA) to the list of known hosts. 2023/06/21 08:22:05 fuzzer started 2023/06/21 08:22:05 dialing manager at localhost:36067 2023/06/21 08:22:05 checking machine... 2023/06/21 08:22:05 checking revisions... [ 45.771172] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:22:05 testing simple program... [ 45.811545] cgroup: Unknown subsys name 'net' [ 45.904104] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:22:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180803b RCX=0000000000000001 RDX=1ffff11001e83ea8 RSI=ffff88800f41f850 RDI=ffffffff8180803b RBP=ffffffff8180803b RSP=ffff88800f41f490 R8 =0000000000000001 R9 =ffff88800f41f528 R10=0000000000038001 R11=0000000000020de5 R12=0000000000000001 R13=0000000000000000 R14=ffff888019b251c0 R15=0000000000092cc0 RIP=ffffffff811fc771 RFL=00000283 [--S---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 00007fcaf4287900 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=00007efdb4724fd0 CR3=000000000e7b8000 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=e93f9a00d8d554ad7541160d6d7d47e8 XMM02=2c67c8bc2e329bc3000000000011dda0 XMM03=fb795ef6d65770560000000000121968 XMM04=fd3e4dc999a4ca1100000000000ae988 XMM05=07c8bb74b6c04a440000000000132628 XMM06=ec6105b35098fbc90000000000131860 XMM07=e042d86d42eb936e0000000000121c40 XMM08=331f6421672b12d6000000000011de00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc32 RBX=ffffffff85dfe190 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe180 RSP=ffff88800dbaf220 R8 =ffffffff86139066 R9 =ffff88800dbaf318 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe1a4 R13=ffffffff85dfe158 R14=ffffffff85dfe17c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 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=00007fab180df028 CR3=000000000e772000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e7061727762696c2f756e672d78 XMM02=00302e6f732e7061727762696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000