[ 30.478601] BUG: Bad rss-counter state mm:0000000043fdb15c type:MM_FILEPAGES val:33 [ 30.479785] BUG: Bad rss-counter state mm:0000000043fdb15c type:MM_ANONPAGES val:22 [ 30.516910] ================================================================== [ 30.518025] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.519136] Read of size 8 at addr ffff888015e68df0 by task sshd/222 [ 30.520060] [ 30.520284] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.521341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.522575] Call Trace: [ 30.522911] [ 30.523242] dump_stack_lvl+0x91/0xf0 [ 30.523797] print_report+0xcc/0x620 [ 30.524303] ? __virt_addr_valid+0x102/0x340 [ 30.524920] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.525623] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.526337] kasan_report+0xbe/0xf0 [ 30.526874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.527572] vma_interval_tree_remove+0xc75/0xec0 [ 30.528256] vma_prepare+0xc54/0x11a0 [ 30.528777] __split_vma+0x5af/0x950 [ 30.529301] ? __pfx___split_vma+0x10/0x10 [ 30.529911] ? find_held_lock+0x2c/0x110 [ 30.530499] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.531150] ? lock_is_held_type+0x9f/0x120 [ 30.531739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.532423] ? mtree_range_walk+0x632/0x900 [ 30.533044] ? mas_walk+0x5c7/0x7c0 [ 30.533581] do_vmi_munmap+0x1f1/0x2b0 [ 30.534075] mmap_region+0x1f9/0x2660 [ 30.534640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.535207] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.535924] ? __pfx_lock_acquire+0x10/0x10 [ 30.536451] ? __pfx_mmap_region+0x10/0x10 [ 30.536974] ? security_mmap_addr+0x7d/0xa0 [ 30.537524] ? get_unmapped_area+0x1f5/0x3f0 [ 30.538164] do_mmap+0x854/0xf00 [ 30.538600] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.539087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.539783] ksys_mmap_pgoff+0x3af/0x500 [ 30.540401] do_syscall_64+0x3f/0x90 [ 30.540887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.541648] RIP: 0033:0x7fb602313d82 [ 30.542196] 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 [ 30.544548] RSP: 002b:00007ffd6cf02128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.545448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb602313d82 [ 30.546292] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb60174d000 [ 30.547139] RBP: 00007fb60174d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.547975] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617a33e8ec0 [ 30.548809] R13: 00007ffd6cf02140 R14: 00007ffd6cf02170 R15: 00007ffd6cf024d0 [ 30.549664] [ 30.549955] [ 30.550169] Allocated by task 214: [ 30.550605] kasan_save_stack+0x22/0x50 [ 30.551099] kasan_set_track+0x25/0x30 [ 30.551583] __kasan_slab_alloc+0x59/0x70 [ 30.552094] kmem_cache_alloc+0x16b/0x370 [ 30.552603] vm_area_dup+0x20/0x160 [ 30.553116] __split_vma+0x170/0x950 [ 30.553594] split_vma+0xc6/0x110 [ 30.554032] mprotect_fixup+0x8d2/0xb30 [ 30.554522] do_mprotect_pkey+0x87e/0xd40 [ 30.555030] __x64_sys_mprotect+0x78/0xc0 [ 30.555552] do_syscall_64+0x3f/0x90 [ 30.556028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.556682] [ 30.556897] Freed by task 214: [ 30.557288] kasan_save_stack+0x22/0x50 [ 30.557801] kasan_set_track+0x25/0x30 [ 30.558289] kasan_save_free_info+0x2b/0x50 [ 30.558820] __kasan_slab_free+0x10a/0x190 [ 30.559347] kmem_cache_free+0x10d/0x4d0 [ 30.559848] rcu_core+0x8c8/0x2860 [ 30.560282] __do_softirq+0x1b7/0x7d4 [ 30.560750] [ 30.560963] Last potentially related work creation: [ 30.561584] kasan_save_stack+0x22/0x50 [ 30.562082] __kasan_record_aux_stack+0x8e/0xa0 [ 30.562655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.563288] remove_vma+0x139/0x170 [ 30.563738] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.564288] do_vmi_munmap+0x1f1/0x2b0 [ 30.564772] __vm_munmap+0x138/0x3a0 [ 30.565237] __x64_sys_munmap+0x59/0x80 [ 30.565736] do_syscall_64+0x3f/0x90 [ 30.566208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.566846] [ 30.567064] The buggy address belongs to the object at ffff888015e68d98 [ 30.567064] which belongs to the cache vm_area_struct of size 168 [ 30.568534] The buggy address is located 88 bytes inside of [ 30.568534] freed 168-byte region [ffff888015e68d98, ffff888015e68e40) [ 30.569929] [ 30.570141] The buggy address belongs to the physical page: [ 30.570799] page:0000000007618fae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e68 [ 30.571885] memcg:ffff888015e69001 [ 30.572307] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.572945] page_type: 0xffffffff() [ 30.573394] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.574359] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e69001 [ 30.575258] page dumped because: kasan: bad access detected [ 30.575929] [ 30.576146] Memory state around the buggy address: [ 30.576724] ffff888015e68c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.577588] ffff888015e68d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.578448] >ffff888015e68d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.579516] ^ [ 30.580319] ffff888015e68e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.581182] ffff888015e68e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.582101] ================================================================== [ 30.583023] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.610399] BUG: Bad rss-counter state mm:000000005dd05bc2 type:MM_FILEPAGES val:33 [ 32.611488] BUG: Bad rss-counter state mm:000000005dd05bc2 type:MM_ANONPAGES val:22 [ 33.136449] BUG: Bad rss-counter state mm:000000004b6a98cb type:MM_FILEPAGES val:33 [ 33.137595] BUG: Bad rss-counter state mm:000000004b6a98cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54411' (ECDSA) to the list of known hosts. 2023/06/21 03:06:10 fuzzer started 2023/06/21 03:06:10 dialing manager at localhost:36067 2023/06/21 03:06:10 checking machine... 2023/06/21 03:06:10 checking revisions... [ 33.750549] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:06:10 testing simple program... [ 33.802906] cgroup: Unknown subsys name 'net' [ 33.845800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:06:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888013f77568 RCX=0000000000000001 RDX=1ffff110027eeec1 RSI=ffffffff81f39b70 RDI=ffff888013f77574 RBP=ffff888013f77608 RSP=ffff888013f77480 R8 =0000000000000001 R9 =ffff888013f774e0 R10=0000000000038001 R11=000000000001c270 R12=ffff888013f77568 R13=0000000000000000 R14=ffff888006891b40 R15=ffff888018f4bbe0 RIP=ffffffff813ad549 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 00007fa4a97b8900 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=00007ff1cc40a650 CR3=000000000d698000 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=52fe003cf15dfe9f51414e73b188adc6 XMM02=000000000011a8b0d59e07bde36eea69 XMM03=000000000011a9d8ec2efd57dc4c00df XMM04=4c26c5a917200d5700000000000ae988 XMM05=a8e81d3ea5455d6400000000001326b0 XMM06=00c3ffa147b8d8570000000000131130 XMM07=fb795ef6d657705600000000001216c0 XMM08=2c67c8bc2e329bc3000000000011a9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd0c27a908 CR3=000000000dde2000 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=2039303a36303a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a36303a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000