[ 30.875951] BUG: Bad rss-counter state mm:00000000df68afde type:MM_FILEPAGES val:33 [ 30.877910] BUG: Bad rss-counter state mm:00000000df68afde type:MM_ANONPAGES val:22 [ 31.035582] ================================================================== [ 31.036529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.037467] Read of size 8 at addr ffff88800d0ad058 by task sshd/220 [ 31.038245] [ 31.038469] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.039579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.040573] Call Trace: [ 31.040903] [ 31.041182] dump_stack_lvl+0x91/0xf0 [ 31.041688] print_report+0xcc/0x620 [ 31.042172] ? __virt_addr_valid+0x102/0x340 [ 31.042723] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.043382] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.043989] kasan_report+0xbe/0xf0 [ 31.044464] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045089] vma_interval_tree_remove+0xc75/0xec0 [ 31.045684] vma_prepare+0xc54/0x11a0 [ 31.046168] __split_vma+0x5af/0x950 [ 31.046636] ? __pfx___split_vma+0x10/0x10 [ 31.047157] ? find_held_lock+0x2c/0x110 [ 31.047697] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.048275] ? lock_is_held_type+0x9f/0x120 [ 31.048811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.049412] ? mtree_range_walk+0x632/0x900 [ 31.049959] ? mas_walk+0x5c7/0x7c0 [ 31.050438] do_vmi_munmap+0x1f1/0x2b0 [ 31.050926] mmap_region+0x1f9/0x2660 [ 31.051429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.051944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.052648] ? __pfx_lock_acquire+0x10/0x10 [ 31.053175] ? __pfx_mmap_region+0x10/0x10 [ 31.053703] ? security_mmap_addr+0x7d/0xa0 [ 31.054245] ? get_unmapped_area+0x1f5/0x3f0 [ 31.054789] do_mmap+0x854/0xf00 [ 31.055250] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.055748] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.056326] ksys_mmap_pgoff+0x3af/0x500 [ 31.056830] do_syscall_64+0x3f/0x90 [ 31.057310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.057957] RIP: 0033:0x7fe1c3897d82 [ 31.058412] 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 [ 31.060567] RSP: 002b:00007ffd8e8635e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.061479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1c3897d82 [ 31.062332] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1c2cd1000 [ 31.063181] RBP: 00007fe1c2cd1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.064039] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bcfc9f8d90 [ 31.064882] R13: 00007ffd8e863600 R14: 00007ffd8e863630 R15: 00007ffd8e863990 [ 31.065729] [ 31.066027] [ 31.066247] Allocated by task 213: [ 31.066674] kasan_save_stack+0x22/0x50 [ 31.067181] kasan_set_track+0x25/0x30 [ 31.067693] __kasan_slab_alloc+0x59/0x70 [ 31.068221] kmem_cache_alloc+0x16b/0x370 [ 31.068737] vm_area_dup+0x20/0x160 [ 31.069197] __split_vma+0x170/0x950 [ 31.069667] split_vma+0xc6/0x110 [ 31.070106] mprotect_fixup+0x8d2/0xb30 [ 31.070612] do_mprotect_pkey+0x87e/0xd40 [ 31.071137] __x64_sys_mprotect+0x78/0xc0 [ 31.071662] do_syscall_64+0x3f/0x90 [ 31.072141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072784] [ 31.073012] Freed by task 213: [ 31.073402] kasan_save_stack+0x22/0x50 [ 31.073901] kasan_set_track+0x25/0x30 [ 31.074396] kasan_save_free_info+0x2b/0x50 [ 31.074926] __kasan_slab_free+0x10a/0x190 [ 31.075467] kmem_cache_free+0x10d/0x4d0 [ 31.075975] rcu_core+0x8c8/0x2860 [ 31.076414] __do_softirq+0x1b7/0x7d4 [ 31.076891] [ 31.077107] Last potentially related work creation: [ 31.077685] kasan_save_stack+0x22/0x50 [ 31.078185] __kasan_record_aux_stack+0x8e/0xa0 [ 31.078756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.079416] remove_vma+0x139/0x170 [ 31.079864] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.080504] do_vmi_munmap+0x1f1/0x2b0 [ 31.080986] __vm_munmap+0x138/0x3a0 [ 31.081467] __x64_sys_munmap+0x59/0x80 [ 31.081964] do_syscall_64+0x3f/0x90 [ 31.082440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083081] [ 31.083309] The buggy address belongs to the object at ffff88800d0ad000 [ 31.083309] which belongs to the cache vm_area_struct of size 168 [ 31.084757] The buggy address is located 88 bytes inside of [ 31.084757] freed 168-byte region [ffff88800d0ad000, ffff88800d0ad0a8) [ 31.086165] [ 31.086380] The buggy address belongs to the physical page: [ 31.087039] page:00000000e1533d36 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd0ad [ 31.088145] memcg:ffff88800d401901 [ 31.088574] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.089214] page_type: 0xffffffff() [ 31.089670] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388bc0 dead000000000008 [ 31.090578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d401901 [ 31.091484] page dumped because: kasan: bad access detected [ 31.092143] [ 31.092360] Memory state around the buggy address: [ 31.092932] ffff88800d0acf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.093789] ffff88800d0acf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.094639] >ffff88800d0ad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.095505] ^ [ 31.096226] ffff88800d0ad080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.097082] ffff88800d0ad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.097931] ================================================================== [ 31.098891] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.883243] BUG: Bad rss-counter state mm:000000005a6446f8 type:MM_FILEPAGES val:33 [ 33.884255] BUG: Bad rss-counter state mm:000000005a6446f8 type:MM_ANONPAGES val:22 [ 34.377177] BUG: Bad rss-counter state mm:00000000473cf2b2 type:MM_FILEPAGES val:33 [ 34.378188] BUG: Bad rss-counter state mm:00000000473cf2b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64599' (ECDSA) to the list of known hosts. 2023/06/21 01:40:57 fuzzer started 2023/06/21 01:40:57 dialing manager at localhost:36067 2023/06/21 01:40:57 checking machine... 2023/06/21 01:40:57 checking revisions... [ 35.134689] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:40:57 testing simple program... [ 35.182204] cgroup: Unknown subsys name 'net' [ 35.222615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:40:56 Registers: info registers vcpu 0 RAX=000000000000000c RBX=000000008a34d48f RCX=ffff88806c66a478 RDX=0000000000000012 RSI=ffffffff81af9b83 RDI=000000009c007e4b RBP=ffff88800ebf06a0 RSP=ffff888016dc7588 R8 =00000000cff049aa R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888016dc75f0 R15=0000000000000012 RIP=ffffffff82270500 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 00007f57adc03700 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=00007ffc1ccd8e38 CR3=000000000d8c4000 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=2036353a30343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09e10 RDI=ffffffff81809add RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801a14fa10 RIP=ffffffff811303b2 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 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=00007f744e083000 CR3=0000000013a96000 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=fccc7694ce64d88b434f0c3551b5de7e XMM02=2c67c8bc2e329bc3000000000011b208 XMM03=fb795ef6d65770560000000000121bc8 XMM04=c989be65d158c26300000000000ae988 XMM05=19e9129bd510f23500000000001316d8 XMM06=96ec5f7e2764438c00000000001308b0 XMM07=e042d86d42eb936e0000000000121ea0 XMM08=3e9c17b566fed6cc000000000011b268 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000