[ 23.864063] BUG: Bad rss-counter state mm:000000003301d308 type:MM_FILEPAGES val:33 [ 23.864640] BUG: Bad rss-counter state mm:000000003301d308 type:MM_ANONPAGES val:22 [ 23.983230] ================================================================== [ 23.983938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.984660] Read of size 8 at addr ffff88801bc2aa50 by task sshd/219 [ 23.985259] [ 23.985426] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.986089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.986980] Call Trace: [ 23.987230] [ 23.987448] dump_stack_lvl+0x91/0xf0 [ 23.987824] print_report+0xcc/0x620 [ 23.988193] ? __virt_addr_valid+0x102/0x340 [ 23.988619] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.989132] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.989656] kasan_report+0xbe/0xf0 [ 23.989932] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.990278] vma_interval_tree_remove+0xc75/0xec0 [ 23.990613] vma_prepare+0xc54/0x11a0 [ 23.990879] __split_vma+0x5af/0x950 [ 23.991141] ? __pfx___split_vma+0x10/0x10 [ 23.991441] ? find_held_lock+0x2c/0x110 [ 23.991728] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.992049] ? lock_is_held_type+0x9f/0x120 [ 23.992352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.992688] ? mtree_range_walk+0x632/0x900 [ 23.993002] ? mas_walk+0x5c7/0x7c0 [ 23.993266] do_vmi_munmap+0x1f1/0x2b0 [ 23.993546] mmap_region+0x1f9/0x2660 [ 23.993812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.994103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.994504] ? __pfx_lock_acquire+0x10/0x10 [ 23.994799] ? __pfx_mmap_region+0x10/0x10 [ 23.995091] ? security_mmap_addr+0x7d/0xa0 [ 23.995391] ? get_unmapped_area+0x1f5/0x3f0 [ 23.995700] do_mmap+0x854/0xf00 [ 23.995939] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.996217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.996536] ksys_mmap_pgoff+0x3af/0x500 [ 23.996822] do_syscall_64+0x3f/0x90 [ 23.997092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.997468] RIP: 0033:0x7fdefd2f3d82 [ 23.997718] 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 [ 23.998888] RSP: 002b:00007ffd0bc75a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.999390] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdefd2f3d82 [ 23.999862] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdefc72d000 [ 24.000339] RBP: 00007fdefc72d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.000814] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b8c8a8b20 [ 24.001295] R13: 00007ffd0bc75aa0 R14: 00007ffd0bc75ad0 R15: 00007ffd0bc75e30 [ 24.001771] [ 24.001932] [ 24.002049] Allocated by task 207: [ 24.002287] kasan_save_stack+0x22/0x50 [ 24.002568] kasan_set_track+0x25/0x30 [ 24.002839] __kasan_slab_alloc+0x59/0x70 [ 24.003127] kmem_cache_alloc+0x16b/0x370 [ 24.003412] vm_area_dup+0x20/0x160 [ 24.003664] __split_vma+0x170/0x950 [ 24.003920] split_vma+0xc6/0x110 [ 24.004165] mprotect_fixup+0x8d2/0xb30 [ 24.004449] do_mprotect_pkey+0x87e/0xd40 [ 24.004736] __x64_sys_mprotect+0x78/0xc0 [ 24.005028] do_syscall_64+0x3f/0x90 [ 24.005296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.005648] [ 24.005771] Freed by task 207: [ 24.005987] kasan_save_stack+0x22/0x50 [ 24.006265] kasan_set_track+0x25/0x30 [ 24.006540] kasan_save_free_info+0x2b/0x50 [ 24.006839] __kasan_slab_free+0x10a/0x190 [ 24.007135] kmem_cache_free+0x10d/0x4d0 [ 24.007422] rcu_core+0x8c8/0x2860 [ 24.007670] __do_softirq+0x1b7/0x7d4 [ 24.007940] [ 24.008061] Last potentially related work creation: [ 24.008381] kasan_save_stack+0x22/0x50 [ 24.008659] __kasan_record_aux_stack+0x8e/0xa0 [ 24.008992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.009350] remove_vma+0x139/0x170 [ 24.009595] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.009904] do_vmi_munmap+0x1f1/0x2b0 [ 24.010173] __vm_munmap+0x138/0x3a0 [ 24.010435] __x64_sys_munmap+0x59/0x80 [ 24.010707] do_syscall_64+0x3f/0x90 [ 24.010979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.011339] [ 24.011461] The buggy address belongs to the object at ffff88801bc2a9f8 [ 24.011461] which belongs to the cache vm_area_struct of size 168 [ 24.012278] The buggy address is located 88 bytes inside of [ 24.012278] freed 168-byte region [ffff88801bc2a9f8, ffff88801bc2aaa0) [ 24.013070] [ 24.013191] The buggy address belongs to the physical page: [ 24.013549] page:0000000026ba464a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc2a [ 24.014150] memcg:ffff88801a385701 [ 24.014388] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.014748] page_type: 0xffffffff() [ 24.014995] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.015506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a385701 [ 24.016006] page dumped because: kasan: bad access detected [ 24.016363] [ 24.016487] Memory state around the buggy address: [ 24.016808] ffff88801bc2a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.017283] ffff88801bc2a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.017759] >ffff88801bc2aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.018222] ^ [ 24.018601] ffff88801bc2aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.019067] ffff88801bc2ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.019544] ================================================================== [ 24.020049] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.930169] BUG: Bad rss-counter state mm:00000000cc42ddd6 type:MM_FILEPAGES val:33 [ 25.931422] BUG: Bad rss-counter state mm:00000000cc42ddd6 type:MM_ANONPAGES val:22 [ 26.406068] BUG: Bad rss-counter state mm:000000002e81dd3c type:MM_FILEPAGES val:33 [ 26.407066] BUG: Bad rss-counter state mm:000000002e81dd3c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45419' (ECDSA) to the list of known hosts. 2023/06/20 19:46:02 fuzzer started 2023/06/20 19:46:03 dialing manager at localhost:36067 2023/06/20 19:46:03 checking machine... 2023/06/20 19:46:03 checking revisions... [ 27.142142] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:46:03 testing simple program... [ 27.191511] cgroup: Unknown subsys name 'net' [ 27.236651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:46:02 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=00007f365a758da0 CR3=000000000d762000 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=aaffdb565d4b2ebd29438dd9a0b46d2c XMM02=000000000011a1e8eff9b2d0a8fce9cb XMM03=000000000011a2b82c67c8bc2e329bc3 XMM04=715284169cf7546900000000000ae988 XMM05=dfcdbad4f1609c370000000000130bf0 XMM06=496eec17508fa0ea000000000012f660 XMM07=e042d86d42eb936e0000000000121350 XMM08=f920b18f67fd275b000000000011a2b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018e09b40 RCX=ffff88800fb20000 RDX=ffff88806cf09a70 RSI=ffff888018e09b40 RDI=ffff88806cf09a20 RBP=ffff88806cf09a70 RSP=ffff88806cf099e0 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806cf09a70 R11=00000000000b6a61 R12=ffff88806cf09a20 R13=ffff88806cf09a98 R14=ffff88806cf09ab8 R15=ffff88806cf09a70 RIP=ffffffff8450e096 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 00007f7c20bd8900 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=00007ffc63c62000 CR3=000000000f618000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000