Hello, syzbot found the following issue on: HEAD commit: 1343433ed389 Add linux-next specific files for 20250630 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1243e3d4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c1ce97baf6bd6397 dashboard link: https://syzkaller.appspot.com/bug?extid=6246a83e7bd9f8a3e239 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b1b88c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c3387c64e9ec/disk-1343433e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/abf15e85d8dd/vmlinux-1343433e.xz kernel image: https://storage.googleapis.com/syzbot-assets/081c344403bc/bzImage-1343433e.xz The issue was bisected to: commit 8b877c5aaaaf9b5170928d0e033ea9b0c538fc94 Author: Suren Baghdasaryan <surenb@xxxxxxxxxx> Date: Tue Jun 24 19:33:59 2025 +0000 mm/maps: execute PROCMAP_QUERY ioctl under per-vma locks bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16095770580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=15095770580000 console output: https://syzkaller.appspot.com/x/log.txt?x=11095770580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6246a83e7bd9f8a3e239@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 8b877c5aaaaf ("mm/maps: execute PROCMAP_QUERY ioctl under per-vma locks") BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 6032, name: syz.0.16 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 2 locks held by syz.0.16/6032: #0: ffffffff8e13bee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e13bee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e13bee0 (rcu_read_lock){....}-{1:3}, at: query_vma_setup+0x18/0x110 fs/proc/task_mmu.c:499 #1: ffff888076dbe308 (vm_lock){++++}-{0:0}, at: lock_next_vma+0x146/0xdc0 mm/mmap_lock.c:220 CPU: 1 UID: 0 PID: 6032 Comm: syz.0.16 Not tainted 6.16.0-rc4-next-20250630-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __might_resched+0x495/0x610 kernel/sched/core.c:8687 might_alloc include/linux/sched/mm.h:321 [inline] slab_pre_alloc_hook mm/slub.c:4131 [inline] slab_alloc_node mm/slub.c:4209 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kmalloc_noprof+0xbc/0x4f0 mm/slub.c:4377 kmalloc_noprof include/linux/slab.h:909 [inline] do_procmap_query fs/proc/task_mmu.c:690 [inline] procfs_procmap_ioctl+0x877/0xd10 fs/proc/task_mmu.c:748 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f107ed8e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffd594c468 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f107efb5fa0 RCX: 00007f107ed8e929 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007f107ee10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f107efb5fa0 R14: 00007f107efb5fa0 R15: 0000000000000003 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
