syzkaller login: [ 31.685078] BUG: Bad rss-counter state mm:00000000437ea764 type:MM_FILEPAGES val:33 [ 31.686168] BUG: Bad rss-counter state mm:00000000437ea764 type:MM_ANONPAGES val:22 [ 31.859059] ================================================================== [ 31.859928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.860809] Read of size 8 at addr ffff888018ffc228 by task sshd/221 [ 31.861631] [ 31.861839] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.862655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.863570] Call Trace: [ 31.863876] [ 31.864144] dump_stack_lvl+0x91/0xf0 [ 31.864607] print_report+0xcc/0x620 [ 31.865065] ? __virt_addr_valid+0x102/0x340 [ 31.865603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.866187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.866773] kasan_report+0xbe/0xf0 [ 31.867230] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.867813] vma_interval_tree_remove+0xc75/0xec0 [ 31.868386] vma_prepare+0xc54/0x11a0 [ 31.868839] __split_vma+0x5af/0x950 [ 31.869296] ? __pfx___split_vma+0x10/0x10 [ 31.869843] ? find_held_lock+0x2c/0x110 [ 31.870363] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.870925] ? lock_is_held_type+0x9f/0x120 [ 31.871461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.872062] ? mtree_range_walk+0x632/0x900 [ 31.872599] ? mas_walk+0x5c7/0x7c0 [ 31.873073] do_vmi_munmap+0x1f1/0x2b0 [ 31.873577] mmap_region+0x1f9/0x2660 [ 31.874054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.874568] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.875273] ? __pfx_lock_acquire+0x10/0x10 [ 31.875801] ? __pfx_mmap_region+0x10/0x10 [ 31.876327] ? security_mmap_addr+0x7d/0xa0 [ 31.876848] ? get_unmapped_area+0x1f5/0x3f0 [ 31.877395] do_mmap+0x854/0xf00 [ 31.877851] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.878341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.878904] ksys_mmap_pgoff+0x3af/0x500 [ 31.879404] do_syscall_64+0x3f/0x90 [ 31.879880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.880561] RIP: 0033:0x7f1948c56d82 [ 31.881028] 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 [ 31.883131] RSP: 002b:00007ffe09068ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.884032] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1948c56d82 [ 31.884876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1948090000 [ 31.885721] RBP: 00007f1948090000 R08: 0000000000000009 R09: 0000000000001000 [ 31.886547] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a618e9f70 [ 31.887391] R13: 00007ffe09068f00 R14: 00007ffe09068f30 R15: 00007ffe09069290 [ 31.888238] [ 31.888519] [ 31.888731] Allocated by task 214: [ 31.889157] kasan_save_stack+0x22/0x50 [ 31.889666] kasan_set_track+0x25/0x30 [ 31.890159] __kasan_slab_alloc+0x59/0x70 [ 31.890679] kmem_cache_alloc+0x16b/0x370 [ 31.891201] vm_area_dup+0x20/0x160 [ 31.891653] __split_vma+0x170/0x950 [ 31.892122] split_vma+0xc6/0x110 [ 31.892552] mprotect_fixup+0x8d2/0xb30 [ 31.893053] do_mprotect_pkey+0x87e/0xd40 [ 31.893588] __x64_sys_mprotect+0x78/0xc0 [ 31.894110] do_syscall_64+0x3f/0x90 [ 31.894593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.895226] [ 31.895442] Freed by task 214: [ 31.895836] kasan_save_stack+0x22/0x50 [ 31.896330] kasan_set_track+0x25/0x30 [ 31.896822] kasan_save_free_info+0x2b/0x50 [ 31.897349] __kasan_slab_free+0x10a/0x190 [ 31.897894] kmem_cache_free+0x10d/0x4d0 [ 31.898397] rcu_core+0x8c8/0x2860 [ 31.898840] __do_softirq+0x1b7/0x7d4 [ 31.899315] [ 31.899524] Last potentially related work creation: [ 31.900108] kasan_save_stack+0x22/0x50 [ 31.900603] __kasan_record_aux_stack+0x8e/0xa0 [ 31.901174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.901833] remove_vma+0x139/0x170 [ 31.902279] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.902834] do_vmi_munmap+0x1f1/0x2b0 [ 31.903324] __vm_munmap+0x138/0x3a0 [ 31.903787] __x64_sys_munmap+0x59/0x80 [ 31.904273] do_syscall_64+0x3f/0x90 [ 31.904736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.905383] [ 31.905606] The buggy address belongs to the object at ffff888018ffc1d0 [ 31.905606] which belongs to the cache vm_area_struct of size 168 [ 31.907068] The buggy address is located 88 bytes inside of [ 31.907068] freed 168-byte region [ffff888018ffc1d0, ffff888018ffc278) [ 31.908454] [ 31.908667] The buggy address belongs to the physical page: [ 31.909323] page:00000000c89e2c87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ffc [ 31.910414] memcg:ffff888008efa001 [ 31.910846] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.911488] page_type: 0xffffffff() [ 31.911936] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.912852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008efa001 [ 31.913756] page dumped because: kasan: bad access detected [ 31.914406] [ 31.914622] Memory state around the buggy address: [ 31.915200] ffff888018ffc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.916048] ffff888018ffc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.916897] >ffff888018ffc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.917749] ^ [ 31.918295] ffff888018ffc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.919138] ffff888018ffc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.919971] ================================================================== [ 31.920952] Disabling lock debugging due to kernel taint [ 33.694780] BUG: Bad rss-counter state mm:00000000d59bd767 type:MM_FILEPAGES val:33 [ 33.695974] BUG: Bad rss-counter state mm:00000000d59bd767 type:MM_ANONPAGES val:22 [ 34.138894] BUG: Bad rss-counter state mm:000000007f1284fd type:MM_FILEPAGES val:33 [ 34.140074] BUG: Bad rss-counter state mm:000000007f1284fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34387' (ECDSA) to the list of known hosts. 2023/06/19 12:43:39 fuzzer started 2023/06/19 12:43:39 dialing manager at localhost:44161 2023/06/19 12:43:39 checking machine... 2023/06/19 12:43:39 checking revisions... [ 34.861730] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:43:39 testing simple program... [ 34.914946] cgroup: Unknown subsys name 'net' [ 34.959476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:43:38 Registers: info registers vcpu 0 RAX=1ffffffff0bb783c RBX=ffffffff85dbc1e4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1cc RSP=ffff88806ce099e0 R8 =ffffffff860d68c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1cc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fbcea4f2900 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=00007ff549631650 CR3=000000000c7c2000 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=cabface5f8cdd58f2b4106b503307456 XMM02=0000000000120d40d59e07bde36eea69 XMM03=0000000000120e68ec2efd57dc4c00df XMM04=41809eaf2f93a3c100000000000ae988 XMM05=7cee28ff7a79a7110000000000135390 XMM06=e4cb8bb95a7664b600000000001341f0 XMM07=fb795ef6d65770560000000000124660 XMM08=2c67c8bc2e329bc30000000000120e68 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=00007ffd81e46c58 CR3=0000000018c9c000 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=2039333a33343a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a33343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000