[ 23.872975] BUG: Bad rss-counter state mm:00000000af238c3d type:MM_FILEPAGES val:33 [ 23.874162] BUG: Bad rss-counter state mm:00000000af238c3d type:MM_ANONPAGES val:22 [ 24.032473] ================================================================== [ 24.033451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.034448] Read of size 8 at addr ffff88800eb57058 by task sshd/218 [ 24.035339] [ 24.035577] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.036490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.037526] Call Trace: [ 24.037865] [ 24.038165] dump_stack_lvl+0x91/0xf0 [ 24.038681] print_report+0xcc/0x620 [ 24.039192] ? __virt_addr_valid+0x102/0x340 [ 24.039799] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.040453] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.041107] kasan_report+0xbe/0xf0 [ 24.041607] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.042263] vma_interval_tree_remove+0xc75/0xec0 [ 24.042900] vma_prepare+0xc54/0x11a0 [ 24.043407] __split_vma+0x5af/0x950 [ 24.043924] ? __pfx___split_vma+0x10/0x10 [ 24.044484] ? find_held_lock+0x2c/0x110 [ 24.045035] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.045633] ? lock_is_held_type+0x9f/0x120 [ 24.046208] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.046853] ? mtree_range_walk+0x632/0x900 [ 24.047437] ? mas_walk+0x5c7/0x7c0 [ 24.047952] do_vmi_munmap+0x1f1/0x2b0 [ 24.048473] mmap_region+0x1f9/0x2660 [ 24.048985] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.049528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.050294] ? __pfx_lock_acquire+0x10/0x10 [ 24.050861] ? __pfx_mmap_region+0x10/0x10 [ 24.051422] ? security_mmap_addr+0x7d/0xa0 [ 24.052004] ? get_unmapped_area+0x1f5/0x3f0 [ 24.052585] do_mmap+0x854/0xf00 [ 24.053052] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.053576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.054173] ksys_mmap_pgoff+0x3af/0x500 [ 24.054713] do_syscall_64+0x3f/0x90 [ 24.055219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.055913] RIP: 0033:0x7ff29f70fd82 [ 24.056397] 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 [ 24.058668] RSP: 002b:00007ffe27089cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.059649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff29f70fd82 [ 24.060552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff29eb49000 [ 24.061454] RBP: 00007ff29eb49000 R08: 0000000000000009 R09: 0000000000001000 [ 24.062356] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f242fdec0 [ 24.063257] R13: 00007ffe27089ce0 R14: 00007ffe27089d10 R15: 00007ffe2708a070 [ 24.064186] [ 24.064495] [ 24.064722] Allocated by task 211: [ 24.065178] kasan_save_stack+0x22/0x50 [ 24.065711] kasan_set_track+0x25/0x30 [ 24.066237] __kasan_slab_alloc+0x59/0x70 [ 24.066792] kmem_cache_alloc+0x16b/0x370 [ 24.067338] vm_area_dup+0x20/0x160 [ 24.067830] __split_vma+0x170/0x950 [ 24.068325] split_vma+0xc6/0x110 [ 24.068788] mprotect_fixup+0x8d2/0xb30 [ 24.069321] do_mprotect_pkey+0x87e/0xd40 [ 24.069873] __x64_sys_mprotect+0x78/0xc0 [ 24.070426] do_syscall_64+0x3f/0x90 [ 24.070929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.071627] [ 24.071856] Freed by task 211: [ 24.072271] kasan_save_stack+0x22/0x50 [ 24.072802] kasan_set_track+0x25/0x30 [ 24.073322] kasan_save_free_info+0x2b/0x50 [ 24.073886] __kasan_slab_free+0x10a/0x190 [ 24.074451] kmem_cache_free+0x10d/0x4d0 [ 24.074990] rcu_core+0x8c8/0x2860 [ 24.075459] __do_softirq+0x1b7/0x7d4 [ 24.075982] [ 24.076209] Last potentially related work creation: [ 24.076836] kasan_save_stack+0x22/0x50 [ 24.077367] __kasan_record_aux_stack+0x8e/0xa0 [ 24.077974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.078654] remove_vma+0x139/0x170 [ 24.079132] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.079743] do_vmi_munmap+0x1f1/0x2b0 [ 24.080258] __vm_munmap+0x138/0x3a0 [ 24.080751] __x64_sys_munmap+0x59/0x80 [ 24.081277] do_syscall_64+0x3f/0x90 [ 24.081787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.082467] [ 24.082694] Second to last potentially related work creation: [ 24.083424] kasan_save_stack+0x22/0x50 [ 24.083974] __kasan_record_aux_stack+0x8e/0xa0 [ 24.084581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.085260] remove_vma+0x139/0x170 [ 24.085737] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.086326] do_vmi_munmap+0x1f1/0x2b0 [ 24.086839] mmap_region+0x1f9/0x2660 [ 24.087350] do_mmap+0x854/0xf00 [ 24.087816] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.088333] ksys_mmap_pgoff+0x3af/0x500 [ 24.088870] do_syscall_64+0x3f/0x90 [ 24.089373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.090053] [ 24.090280] The buggy address belongs to the object at ffff88800eb57000 [ 24.090280] which belongs to the cache vm_area_struct of size 168 [ 24.091868] The buggy address is located 88 bytes inside of [ 24.091868] freed 168-byte region [ffff88800eb57000, ffff88800eb570a8) [ 24.093372] [ 24.093600] The buggy address belongs to the physical page: [ 24.094305] page:00000000264f0487 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb57 [ 24.095457] memcg:ffff88800ec83301 [ 24.095919] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.096609] page_type: 0xffffffff() [ 24.097094] raw: 0100000000000200 ffff88800879fc80 ffffea0000385040 dead000000000002 [ 24.098071] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec83301 [ 24.099035] page dumped because: kasan: bad access detected [ 24.099755] [ 24.099989] Memory state around the buggy address: [ 24.100608] ffff88800eb56f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 24.101519] ffff88800eb56f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.102430] >ffff88800eb57000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.103335] ^ [ 24.104124] ffff88800eb57080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.105039] ffff88800eb57100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.105952] ================================================================== [ 24.107049] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.724345] BUG: Bad rss-counter state mm:000000005aa142c7 type:MM_FILEPAGES val:33 [ 26.725910] BUG: Bad rss-counter state mm:000000005aa142c7 type:MM_ANONPAGES val:22 [ 27.273500] BUG: Bad rss-counter state mm:00000000c1a16c18 type:MM_FILEPAGES val:33 [ 27.274668] BUG: Bad rss-counter state mm:00000000c1a16c18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23905' (ECDSA) to the list of known hosts. 2023/06/19 11:36:13 fuzzer started 2023/06/19 11:36:13 dialing manager at localhost:44161 2023/06/19 11:36:13 checking machine... 2023/06/19 11:36:13 checking revisions... [ 27.938420] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:36:14 testing simple program... [ 27.985522] cgroup: Unknown subsys name 'net' [ 28.026598] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:13 Registers: info registers vcpu 0 RAX=1ffffffff0bb783e RBX=ffffffff85dbc1f4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff888008f77928 R8 =ffffffff860d68c0 R9 =ffff888008f77a20 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1f4 R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f50a309c900 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=00007f50a3651650 CR3=000000000ffde000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=0000561154fad748 CR3=000000001805a000 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=2033313a36333a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36333a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000